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UFGS 23 70 01.00 10 Central Steam-Generating System, Coal

1. 2 SBD G9 Interconnecting Cable Requirements 24825310 Buffered Output Signals OILER ROOM PANELS AND INSTRUMENTS Instrument Control Panel Indicators Recorders Panel Display Panel Piping and Wiring Pilot Lights Clock Alarm Annunciator Panel Combustion Control Components 10 Steam and Feedwater Flow Measurement 11 Flue Gas Opacity Monitor 12 Sample Cooler Ps Oxygen Analyzer 14 Continuous Blowdown 15 Continuous Emissions Monitoring WASTE HEAT RECOVERY EQUIPMENT 1 Economizers a2 Air Preheaters DRAFT FANS zl Draft Fan Control 22 Draft Fan Drives ATR DUCTS BREECHING STACKS BLOWOFF TANK PUMPS al Boiler Feed Pumps 16 1 1 Casings 16 1 2 Base 16 1 3 Couplings 16 1 4 Automatic Recirculation L625 Turbines 16 1 6 Electric Motors Poel Shop Hydrostatic Testing 22 Condensate Pumps CONDENSATE TANK AND ACCESSORIES cL Condensate Tank 2 Feedwater Makeup Valve HEAT EXCHANGERS DEAERATING FEEDWATER HEATER STEAM TRAPS 1 Bucket Traps 2 Impact Operated Traps 3 Thermostatic Traps 4 Float and Thermostatic Traps PRESSURE GAUGES THERMOMETERS WATER METER CHEMICAL TREATMENT AND WATER SOFTENING EQUIPMENT 1 Chemical Feeder ed Water Softening Equipment 24 2 1 Water Analysis 24 2 2 Zeolite 24 2 3 Reactor Tank 24 2 4 Softening System eA AS Water Test Kit n ECTION 23 70 01 00 10 Page 4 2 2 25 2225 2 NM NMNN NH 2 25 220 2 26 NNN DN NH NMNNNMNDN N
2. 220 2 Instrument Air Compressors kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The designer should determine if two redundant full size instrument air compressors will be required as loss of air will cause unit shutdown unless other provisions are made such as crossties to the soot blower service air system Delete paragraph if not required kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk An electric motor driven oil fr automatic air compressor unit and a refrigerating drying unit shall be provided The air compressor shall be capable of delivering at a pressure of Pa psig not less than 0 00472 standard cubic meters second 10 scfm dry air at an atmospheric dew point of 23 degrees C 10 degrees F with entering air at 35 degrees C 95 degrees F saturated The air compressor unit shall be sized to run not more than 60 percent of the time when all controls are in service The air compressor unit shall be complete with all necessary accessories including automatic pressure control equipment relief valves check valves air filters moisture traps and a receiver with ample capacity for emergency operation of the controls for 15 minutes after compressor shutdown The receiver shall be of vertical construction in accordance ASME BPVC SEC VIII D1 with relief valve and drain fittings The air dryer shal
3. SECTION 23 70 01 00 10 Page 91 2 30 18 Trackmobile Trackmobile shall be provided with a liter cubic inch industrial gasoline engine for moving switching rail cars on the track and hauling carts and other portable vehicles while traveling on its road wheels The trackmobile shall be designed to ride on mm inch gauge track Rail wheels shall be heat treated cast steel keyed on tapered axles solidly mounted suspension system Road wheels shall be heavy duty ply by tires roller bearing mounted wheels with retractable suspension The coupler shall be heavy duty cast steel remotely controlled from cab Maximum speed shall be provided on rail km hour mph low high on road low high Jz The trackmobile shall be able to operate on a maximum grade of percent and minimum curve of m foot radius Trackmobile shall be also equipped with air brakes self energizing drum and shoe type hydraulic service cab heater and defroster sanders electric horn air horn strobe light front and rear lights backup alarm enclosed cab open cab with windshield wipers radio remote control and power steering 23 0 19 En Masse Chain Conveyors These conveyors shall move materials horizontally and or vertically with multiple discharge points and in a dust tight and completely enclosed unit Conveyors shall have a length as
4. rate shall vary in not less than 10 equal increments Electric motor shall be totally enclosed fan cooled type for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with general purpose dust tight explosion proof enclosure s423 33 Hoppers Hoppers shall be constructed of steel plates not less than 6 4 mm 1 4 inch thick shall have a capacity of not less than kg pounds and shall SECTION 23 70 01 00 10 Page 36 be provided with suitable cleanout doors Coal feed to the hoppers shall be fitted with concave type transitions to ensure the proper distribution of coal and coal fines across the width of the hoppers Stoker frame shall be constructed of cast iron cast steel or forgings and all parts of the stoker except the grates shall be properly cooled or otherwise protected from the furnace heat to prevent damage by warping or undue expansion Furnace arrangement and shape shall be as recommended by the stoker manufacturer to ensure proper combustion of the fuel Stoker front plate shall form the front of the boiler for the full width of the boiler and extend from the firing floor to some point above the stoker where it shall connect to the boiler structural framing Front shall be cast iron or steel plate refractory lined with cleanout doors of refractory lined cast
5. Det e2 Optional Counterflashing As alternates to caulking and sealing the annular space between the pip and flashing or metal jacket covered insulation and flashing counterflashing may be accomplished by one of the following methods a Standard roof coupling for threaded pipe up to 150 mm 6 inches in diameter b Lead flashing sleeve for dry vents and turning the sleeve down into the n ECTION 23 70 01 00 10 Page 102 3 pipe to form a waterproof joint c A tack welded or banded metal rain shield around the pipe and sealing as indicated 5 2 Pipe Joints Joints between sections of pipe and fittings shall be welded or flanged Except as otherwise specified fittings 25 mm 1 inch and smaller shall be threaded fittings 32 mm 1 1 4 inches up to but not including 65 mm 2 1 2 inches may b ither threaded or welded and fittings 65 mm 2 1 2 inches and larger shall be either flanged or welded Pipe and fittings 32 mm 1 1 4 inches and larger installed in inaccessible conduits or trenches beneath concrete floor slabs shall be welded Connections to equipment shall be made with black malleable iron unions for pipe 50 mm 2 inches or smaller in diameter and with flanges for pipe 65 mm 2 1 2 inches or larger in diameter ECE Threaded Joints Threaded joints shall be made with tapered threads properly cut and shall be made perfectly tight with a stiff mixture of graphite and oil or
6. Materials of of all carbon steel with the exception of the tubes which should typically be specified as stainless stress relief ann steel in accordance with Fuel oil d after bending aled temper with the heaters shall have carbon steel tubes in accordance with ASTM A179 A179M and be furnished in the stress relief annealed temper with the U bends stress relieved after bending F full diame dwater heaters shall be of all welded construction with bolted ter channel covers to facilitate tube maintenanc as required The channel barrel shall be integral with the tubesheet and have an internal pass partition bolted cover design that shall be readily removable when the c construction shall be material shall material is required required shall be i hannel cover is removed gasketed groove in the channel cover are prohibited SECTION 23 70 01 00 10 all carbon steel Pass partitions that are sealed with a Materials of xcept th be in accordance with ASTM A516 A516M Grade C tubes Pressure boundary when plate or ASTM A350 A350M when forging material is Shroud plate material for desuperheating and subcooling zones n accordance with ASTM A285 A285M Grade C stainless steel in accordance with ASTM A688 A688M Grade TP 304 Tubes shall be stress Page 65 Qe relief annealed temper with the U bends stress relieved after bending T
7. TABLE II FITTINGS on Br Service Size mm inches Title Materials Specification Gauge pipe All Flared or Cast or wrought ASME B16 18 soldered bronze ASME B16 26 Note 1 Conform to ASME B31 1 for wall thickness atch requirements for steam piping Note 2 Conform to ASME B31 1 for wall thickness except minimum shall be extra 10 MANUFACTURERS FIELD SERVICES Provide the services of a manufacturer s representative who is experienced in the installation adjustment and operation of th quipment specified The representative shall supervise the installing adjusting and testing of the equipment 11 FIELD TRAINING Provide a field training course for designated operating staff members Training shall be provided for a total period of hours of normal working time and shall start after the system is functionally complete but prior to final acceptance tests Field training shall cover all of the items contained in the approved operating and maintenance instructions as well as demonstrations of routine maintenance operations Contracting Officer shall be notified at least 14 days prior to date of proposed conduction of the training course s12 FRAMED INSTRUCTIONS Submit proposed diagrams instructions and other sheets before posting Post framed instructions under glass or in laminated plastic including wiring and control diagrams sh
8. SECTION 23 70 01 00 10 Page 54 Pressure Indicator Recorder Point ain steam header X X Boiler drum X Feedwater X X Instrument air X Draft Indicator Recorder Point Windbox X Furnace X Boiler gas outlet X ID fan inlet X Temperature Indicator Recorder Point Main steam xX Boiler gas outlet X Windbox X Feedwater x Level Indicator Recorder Point Boiler drum x Bunker or silo X Flow Indicator Recorder Point ain steam including X totalizer Feedwater x Air X Fuel X Analyzers Indicator Recorder Point Flue gas opacity X Flue gas oxygen X wn ECTION 23 70 01 00 10 Page 2 9 25 Panel Piping and Wiring High pressure and high temperature values shall be pneumatically or electrically transmitter or both to the panel Pneumatic signals shall be 21 to 103 kPa 3 to 15 psig Piping connectors to indicators shall be 6 mm 1 4 inch OD copper tubing conforming to ASTM B68 B68M Flow signals shall be transmitted either pneumatically or electrically to the panel mounted receiver Copper tubing connections and electric wiring shall be run to a terminal block located on the inside of the panel front near the bottom Wiring shall be terminated at an identified terminal strip Wiring shall be suitable for boiler room requirements and installed according to NFPA 70
9. vlon bed Casings Pumps shall have integrally cast suction and discharge flanges that shall be drilled to meet the design pressure of the application The maximum operating temperature for design purposes of any feedpump shall not be less than 204 degrees C 400 degrees F Casings shall be drilled tapped and provided with vent and drain connections Pumps designed for this service shall not require cooling at ratings below 375 kW 500 bhp This applies to both frame cooling or seal cooling Below 375 kW 500 bhp pumps shall employ antifriction radial and thrust bearings lubricated by flinger rings in a sealed housing Seals shall be mechanical and air cooled flush piping conforming to API Std 610 Plan 23 Above 375 kW 500 bhp pumps shall employ a single cooling circuit for both cooling the oil being delivered by a forced oil system to sleeve radial bearings and a floating Ss b b 1 hoe thrust bearing coupled with the seal coolers for both stuffing oxes Mechanical seals shall also be provided In both cases stuffing oxes shall be site convertible to a packed box Leakage shall be no more han 25 mm hour 25 cc hr for a seal life of no less than 25 000 hours Bearing rating shall be not less than 100 000 hours L 10 life at the point of maximum load as defined by ABMA 9 a hbn 3 2 Base Pumps shall be supported on structural steel bases that do not require grouting in order to impart stre
10. 2a Palko Thermostatic Regulating Valves kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE If a hot water generator is not installed this subparagraph will be deleted kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Valves of the self contained type to control water temperature within the domestic hot water generator by regulating the steam supplied to the heating coil shall be installed in the steam supply line to each generator Thermostatic regulating valves shall be designed for a steam working pressure of 1 4 MPa 200 psig and shall operate at the pressure shown The valves shall be adjustable within an operating range of approximately 38 to 71 degrees C 100 to 160 degrees F and shall maintain the desired water temperature within plus or minus 3 degrees C 5 degrees F 22270166 Back Pressure Relief Valves Valves shall have cast iron or steel bodies and shall be equipped with SECTION 23 70 01 00 10 Page 79 corrosion resistant trim and valve seats The valves shall be properly guided and shall be positive closing to prevent leakage Adjustment of the desired back pressure shall cover a range between 34 to 103 kPa 5 to 15 psig The adjustment shall b ffected externally and any shafts extending through the valve body shall be provided with adjustable stuffing boxes having renewable packing 2b Sheed Boiler Automatic Feedwater Recirculating Contr
11. A rack and pinion gate shall be provided at each hopper outlet and shall be a self cleaning type Hand Motor operated sliding plate shall be 9 5 SECTION 23 70 01 00 10 Page 86 mm 3 8 inch thick carbon steel formed into the shape of a winged U The gate plate surface shall be completely protected by an overlapping liner of 3 2 mm 1 8 inch thick ASTM A167 Type 304 stainless steel The gate body material except for the dust cover shall be of 4 5 mm 3 16 inch thick ASTM A167 Type 304L stainless steel where in contact with coal flow 2307 62 Hopper Feeders The vibrating or belt feeders of manufacturer s standard design shall be provided for the service required Motor shall be totally enclosed nonventilated totally enclosed fan cooled type totally enclosed fFan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with weather resistant dust tight explosion proof enclosure 30 8 Truck Hoppers Truck hoppers shall be of standard double hopper design with a belt or vibrating type feeder as indicated The hoppers shall have a capacity of approximately metric tons tons and shall be constructed of 9 5 mm 3 8 inch thick Type 304L stainless steel plates minimum with slopes of at least 55 degr
12. double unit automatic water softener system shall be provided as indicated The system shall be designed for a working pressure of Pa psig The system shall be complete with raw and regenerate water distribution under drain inlet and outlet connection in upper and lower header respectively resin removal connecting pipe legs control valve for service backwash regenerate and rinse water meters pressure gauges brine storage and measuring tank and controls for automatic SECTION 23 70 01 00 10 Page 70 2 8 9 a dei2 Adverse Electrical Conditions Equipment shall be capable of operating as specified and without damage within the electrical environment of the plant This environment includes high voltage high frequency surges caused by electromechanical equipment energy coupled between conductors by capacitance and mutual inductance and imperfect grounds Input and output isolation shielding separation of circuits surge suppression or other measures which may be required to meet these provisions shall be provided Inputs outputs and other connections shall meet the surge to withstand requirements of IEEE C37 90 woeOwe System Design The burner control system shall be compatible in all respects with the boiler and auxiliary equipment The system design shall meet the requirements specified in NFPA 85 The burner control system shall incorporate a continuous purge of the furnace to insure that the boiler
13. 19 DEAERATING F EDWATER HEATER kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Economizer or preheater will be selected to be compatible with pollution control equipment being utilized kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Deaerating feedwater heater shall be installed where indicated and shall be size and capacity indicated Shell shall be cast iron steel plate Tray system for unit shall be cast iron corrosion resistant steel Floats shall be of copper controlled overflow trap type Heater shall be provided with a pressure relief valve thermometers pressure gauge and oil separator A combination temperature pressur recorder shall be installed for each feedwater heater Steam pressure readings shall be taken from the shell and the temperature bulb shall be so placed as to indicate record the temperature of the feedwater after it passes over the trays and sprays An alarm shall be provided to turn on a red pilot signal lamp and to sound a bell gong in the event that water level in the feedwater heater storage tank falls to 300 mm 12 inches above the bottom of the tank The system shall be operated by an approved type of external electric float switch connected to the tank The signal lamp and bell shall be mounted where directed The deaerating fee
14. 62 3 Water Level Stability Test Water level stability test first shall be conducted by use of the manual bypass around the feedwater regulator Test then shall be repeated using the automatic feedwater regulator Boiler shall maintain specified water level stability under both conditions End of Section n ECTION 23 70 01 00 10 Page 116
15. Class 125 2 Sizes 80 mm 3 inches through 1200 mm 48 inches cast iron MSS SP 70 Type I Class 125 Design OT or OF OS amp Y bronze trim b Valves for 150 pound class steel piping shall conform to the following 1 Sizes 65 mm 2 1 2 inches and less bronze MSS SP 80 Type 1 or 2 Class 150 minimum 2 Sizes 80 mm 3 inches through 600 mm 24 inches steel ASME B16 34 Class 150 minimum flanged ends c Valves for system operating pressure greater than 1 4 MPa 200 psi shall be split wedge disc type outside screw and yoke steel and shall be suitable for specified operating steam pressure but not less than Class 300 300 pound class Valves 50 mm 2 inch and smaller shall be forged steel with socket welded ends Valves 65 mm 2 1 2 inches and larger shall be steel and shall have butt welded ends 2eQle hed Globe Valves and Angle Valves Globe type valves shall have outside screw and yoke with bolted bonnets stainless steel trim and flat seats but shall not be the reversed cup type The stuffing boxes shall be large and deep Valves shall be installed with the stem horizontal or above a Valves for 125 pound class steel piping shall conform to the following 1 Sizes 65 mm 2 1 2 inches and less bronze MSS SP 80 Type 1 2 Or 3yo Class 125 2 Sizes 80 mm 3 inches through 300 mm 12 inches cast iron MSS SP 85 Type III and Type IV Class 125 b Valves for 150 pound class steel piping shal
16. The conveying air shall be considered part of the combustion air Coal feed shall be crushed to approximately 6 4 mm 1 4 inch and shall be capable of being used with fluidizing velocities ranging from 1 2 to 3 7 m second 4 to 12 fps For these systems sorbent may be mixed with the coal in the appropriate proportion and fed with the fuel However a separate sorbent feed system is acceptable Over bed feed systems shall be designed to provide even distribution over th ntire bed Heavy duty standard production spreader injector feeders shall be provided for dispersing the specified fuels into the boiler The spreader feeders shall be the chain type or equal as approved by the Contracting Officer The feeder portion shall be of the chain type with infinitely adjustable feed rate from 0 to 100 percent of rated capacity The spreaders shall consist of adjustable rotating paddles on a shaft designed to disperse the specified coals into the boiler at the required locations and to minimize side throw into adjacent bed compartments which may not be in operation The spreaders shall be capable of rotating at variable rates of speed The spreader feeders shall have overfire capability to th xtent required by the design for use in compensating for a spreader feeder out of service For spreader stoker coal feed systems sorbent feed shall be by separat systems These systems shall consist of a method to feed the correct proportion of sorbent over the load range to
17. a self cleaning type Hand Motor operated sliding plate shall be 9 5 mm 3 8 inch thick carbon steel formed into the shape of a winged U The gate plate surface shall be completely protected by an overlapping liner of 3 2 mm 1 8 inch thick ASTM A167 Type 304 stainless steel The gate body material except for the dust cover shall be of 4 5 mm 3 16 inch thick ASTM A167 Type 304L stainless steel where in contact with coal flow 3008 42 Hopper Feeders The vibrating or belt feeders complete with control of manufacturer s standard design for the service required shall be provided Motor shall be totally enclosed nonventilated totally enclosed fan cooled totally enclosed fan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with weather resistant dust tight explosion proof enclosure 309 Vibrator Vibrator shall be electromagnetic type with variable power control that SECTION 23 70 01 00 10 Page 87 exceed 9000 at the pump s best efficiency point BEP The guaranteed NPSH requirements shall reflect 3 percent breakdown criteria The pump s head capacity H Q curve shall be constantly rising to shutoff with no point of inflection There shall be no restriction to operation at any point from minimum continuous flow to design flow
18. metric tons hour tons hour of ash weighing approximately kg cubic meter pcf The tonnage shall be based on average handling rate and not on the instantaneous rate 231 1 4 2 Combination Vacuum Pressure Systems Vacuum pressur quipment shall be commercially produced for this particular type of service and shall include a pressure vessel equipped with a filter section at the top and an aeration ring at the bottom Material shall be drawn into the unit by vacuum with the air separated from the material in the top filter section and exhausted through a Silencer A high level indicator within the vessel shall then reverse th action of the vacuum pressure pump by aspirating air through a silencer and filter unit and discharging the pressurized air into the vessel Part of the air shall be utilized to clean the filter and part of the air shall pass through the aeration ring of the vessel to pick up material and convey it under pressure to the storage silo The unit shall be furnished complete with all automatic air control valves to control air flow to and from the vessel continuously through the two modes of the operating cycle Unit operation shall continue automatically until switched off at the control cabinet All automatic valves interconnecting piping and the vacuum pressure vessel shall be skid mounted Vacuum pressure pump shall be mounted separately The control cabinet may be mounted separately or skid mounted on the vacuum
19. operating pressures test pressures pipe size and thermal conditions In case of a conflict the most stringent requirements shall govern SOR RORMES Curing of Field Bonded Joints All field bonded epoxy cemented joints regardless of ambient temperatures shall be cured with a self regulating thermostatically controlled electrical heating blanket for the time and temperature recommended by the manufacturer for the applicable size and type of joint or by an alternate approved heating method The joined sections shall not be moved during heating or before the joint has cooled to 27 degrees C 80 degrees F or to ambient temperature whichever is higher 65 D4 Metal to FRP Connections Metal to FRP connections shall be made with flanged connections Steel flanges for bolting to FRP flanges shall be flat faced type Wher raised face steel flanges are used spacer rings shall be utilized to provide a flat face seat for FRP flanges A full face Buna N gasket 3 2 mm 1 8 inch thick with a shore hardness of 50 to 60 shall be used between n ECTION 23 70 01 00 10 Page 109 all flanged connections The FRP flange shall have raised sealing rings Flat washers shall be used under all nuts and bolts on FRP flanges Bolts and nuts shall be of noncorrosive metal and torqued to not more than 135 newton meters 100 ft lbs Flanges shall not be buried A concrete pit shall be provided for al
20. pipes in accurate alignment to direct the expansion movement and to prevent buckling swaying and undue strain All piping subjected to vertical movement when operating temperatures exceed ambient temperatures shall be supported by variable spring hangers and supports or by constant support hangers Pipe hanger loads suspended from steel joist between panel points shall not exceed 23 kg 50 pounds Loads exceeding 23 kg 50 pounds shall be suspended from panel points S252 822 Seismic Requirements kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE Provide seismic requirements if a Government designer either Corps office or A E is the Engineer of Record and show on the drawings Delete the bracketed phrase if seismic details are not included Pertinent portions of UFC 3 310 04 and Sections 13 48 00 and 13 48 00 00 10 properly n ECTION 23 70 01 00 10 Page 104 edited must be included in the contract documents kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkxkk Seismic Requirements for Pipe Supports and Structural Bracing All piping and attached valves shall be supported and braced to resist seismic loads as specified under UFC 3 310 04 and Sections 13 48 00 SEISMIC PROTECTION FOR MISCELLANEOUS EQUIPMENT and 13 48 00 00 10 SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT as shown Structural steel required for reinforcement to properly support pip
21. polytetrafluoroethylene tape or equal applied to the male threads only and in no case to the fittings SP oe Welded Joints Welded joints shall be fusion welded in accordance with ASME B31 1 unless otherwise required Changes in direction of piping shall be made with welding fittings only mitering or notching pipe to form elbows and tees or other similar type construction will not be acceptable Branch connections may be made with either welding tees or forged branch outlet fittings either being acceptable without size limitation Branch outlet fittings where used shall be forged flared for improvement flow where attached to the run reinforced against external strains and designed to withstand full pipe bursting strength POD 2rd Beveling Field and shop bevels shall be in accordance with the recognized standards and shall be done by mechanical means or flame cutting Where beveling is done by flame cutting surfaces shall be cleaned of scale and oxidation before welding Olea Leste Alignment Parts to be welded shall be aligned so that no strain is placed on the weld when finally positioned Height shall be so aligned that no part of the pipe wall is offset by more than 20 percent of the wall thickness Flanges and branches shall be set true This alignment shall be preserved during the welding operation Tack welds shall be of the same quality and made by the same procedure as the completed weld otherwise tack
22. tubesheet wit pressure head design sha N b tubesheets channels and bonnets n operating conditions do not impose a large differential cannot be readily accommodated with a simple thin wall For larger differentials lantern ring is acceptable up to 1 03 MPa 150 psig design For pressures above 1 03 MPa 150 psig a split ring floati 1 used xcept th hall be stainless steel in accordance the remainder of the tube side shall the water quality permits with ASTM A249 A24o be all carbon steel water is known to contain chloride levels harmful to the tubes shall be 90 10 Copper Nickel servic 706 the remainder of th in accordance with water side shall be monel clad steel monel Heat water or other f the steam in the with bolted full required The flange and shall have construction shall be ASTM A688 A688M U bends stress r liev Grade TP 304 The exchangers shal channel covers Fixed tubesh xchangers using steam to heat domes luids such as glycol water mixtures or fuel oil shall shell side carbon steel t designs are metal a packed floating ng tic have ll be of U tube designs diameter channel covers to facil tubesheet shall be the ful ll diameter to match the shel sufficient threaded bolt holes so that a shell test may be applied without the channel in place litate tube maintenance as 1 hydro
23. with a minimum thickness of 13 mm 1 2 inch and 300 BHN All welds shall be ground smooth The necessary track guide angles hold down angles and carbon steel chain protectors shall be provided The minimum depth of water in the upper trough shall be m feet The return chain bottom trough shall be dry constructed of 9 5 mm 3 8 inch thick steel plate stiffened and braced with structural shapes and shall be water tight Chain track angles shall be provided with a minimum 13 mm 1 2 inch thick steel replaceable wear flats with a minimum 300 BHN Wear strips shall be also provided under the return flights minimum 13 mm 1 2 inch thick and 50 mm 2 inch wide The conveyor chain shall be a double strand round link or ship type chain case hardened corrosion and abrasion resistant chrome nickle alloy annealed and carburized with surface hardness between 500 600 BHN Design strength and pitch shall be based on operating conditions The conveyor flights hall be mm inches deep by mm inches thick T 1 steel plates ttached on both ends to the chain The flight shall be provided with top S a wear pads and bottom wear strips of abrasion resistant steel plate of 300 BHN minimum A chain tensioner shall be provided at the tail end of SDCC for maintaining proper tension in both strands of the chain The assembly shall include cast iron idler wheel bearings shaft guide block and b d T S earing h
24. 85 decibels at 914 4 mm 3 foot station Fan bearings shall be air cooled or water cooled and backward curved fan blade type with bearings not requiring water cooling may be of the self aligning antifriction type Scroll sheets and rotor blades shall have liners 221 1 Draft Fan Control kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Variable speed control inlet vane control and inlet damper control are in descending order of efficiency capable of control draft fan conditions The choice is based on economics However in erosive services inlet vane control is not desirable kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Forced draft centrifugal fans shall have inlet vane controls variable speed control where indicated Induced draft centrifugal fans shall have inlet vane control inlet damper control variable speed control Axial propeller fans shall have variable propeller pitch control Inlet vanes or dampers shall be suitable for use with combustion control equipment 2011 2 Draft Fan Drives kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkxk NOTE Where motor starters for mechanical equipment are provided in motor control centers delete the reference to motor starters SECTION 23 70 01 00 10 Page 60 accordance with NFPA 70 electric motor connected to the eccentric shaft by V belt
25. A E is the Engineer of Record and show on the drawings Delete the bracketed phrase if seismic details are not included Pertinent portions of UFC 3 310 04 and Sections 13 48 00 and 13 48 00 00 10 properly n ECTION 23 70 01 00 10 Page 104 edited must be included in the contract documents kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkxkk Seismic Requirements for Pipe Supports and Structural Bracing All piping and attached valves shall be supported and braced to resist seismic loads as specified under UFC 3 310 04 and Sections 13 48 00 SEISMIC PROTECTION FOR MISCELLANEOUS EQUIPMENT and 13 48 00 00 10 SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT as shown Structural steel required for reinforcement to properly support piping headers and equipment but not shown shall be provided under this section Material used for supports shall be as specified under Section 05 12 00 STRUCTURAL STEEL FA 3 02333 Structural Attachments Structural steel brackets required to support piping headers and equipment but not shown shall be provided under this section Material used for supports shall be as specified under Section 05 12 00 STRUCTURAL STEEL 3 5 4 Anchors Anchors shall be provided wherever necessary or indicated to localize expansion or prevent undue strain on piping Anchors shall consist of heavy steel collars with
26. Cover and skim coat material shall be comparable to those meeting the requirements of the RMA IP 1 for impact and abrasion resistance The weight sensor shall be a heavy duty industrial electronic force transducer flexure mounted to the force collection system Each sensor shall have a remote indicating meter and a six digit totalizing counter located installed and connected in the boiler control panel Unit frame shall provide rigid support for the material load belt and idlers The unit shall be shop assembled complete with drive and all appurtenances and shall be dust tight in operation 2307 Track Hoppers Track hoppers shall be standard double hopper design with a belt or vibrating type feeder as indicated The hoppers shall have a capacity of approximately metric tons tons and shall be constructed of not less than 9 5 mm 3 8 inch thick Type 304L stainless steel plates with slopes of not less than 55 degrees and shall be stiffened with angles The hoppers may also be of ASTM A36 A36M mild steel minimum 6 4 mm 1 4 inch thick with replaceable liners 6 4 mm 1 4 inch thick ASTM A167 Type 304L stainless steel All rivets and field bolts inside the hopper shall have flat heads The hopper shall be suspended from the track girders by heavy bolts and cast washers or the sides shall be carried to the bottom of the track and supported
27. High temperature block and mineral wool blanket insulation shall be provided between the refractory backup and steel casing or between an inner and outer casing and shall be of sufficient thickness to limit the maximum casing temperature in the furnace area to 54 degrees C 130 degrees F with a surface air velocity of 508 0 mm second 100 fpm and an ambient air temperature of 27 degrees C 80 degrees F when operating at full capacity When boilers are provided with double casings the inner casing shall be constructed of not thinner than 1 897 mm 14 gauge steel sheets Alloy steel conforming to ASTM A568 A568M shall be used where temperatures over 370 degrees C 700 degrees F occur of welded wall construction The width of the fins shall be limited to 19 mm 3 4 inch to prevent overheating of the fins under all operating conditions Designs exceeding 19 mm 3 4 inch may only be used when provided with supporting calculations and subject to the approval of the Contracting Officer Tubes shall be seamless type The fin to tube weld shall be continuous and on both the front fireside and back side of the fin The fin shall not be less than 6 4 mm 1 4 inch thick The construction shall form a pressure tight structure capable of transferring a maximum amount of heat to the tube All welded joints and openings shall be checked by a pressure test Any casing leakage shall be repaired and made pressure tight The maximum deflection of the reinforced p
28. NOTE The designer shall determine if electrical facilities are sufficient to provide the power requirements of electric car heaters or if gas fired heaters must be used The designer will determine if the location and climatic conditions will require Sidecar panels or undercar heaters or a combination of both types of heaters kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk g0 10 22 Gas Fired Heaters Gas fired heaters shall be the infrared radiant type and shall be located between rails and along the walls of the shed Heater shall have an input of approximately 90 kW 300 000 Btuh Heater shall have perforated heavy gauge stainless steel cover that is not affected by water or coal falling from the car Burner shall have windproof pilot main gas solenoid valve and safety switch to interrupt gas supply to burner if pilot is not burning and shall be furnished with manual cutoff valves and pressure regulator Heater shall be supplied with electric blower for furnishing combustion air to the burner and with all other controls and accessories as recommended by the heater manufacturer for a complete installation and shall comply with ANSI 283 19 CSA 2 35 and UL 795 230 10 2 Electric Infrared Radiant Heaters Electric infrared radiant heaters shall be weatherproof car thawing equipment with radiating surfaces of alloy tubing enclosing electrically insulated conductors The equipment shall
29. Pressure gauges shall be heavy duty industrial type with phenolic case solid front rear blowout threaded ring shatterproof glass and 13 mm 1 2 inch NPT bottom connection suitable for specified pressure or vacuum with minimum 114 3 mm 4 1 2 inch diameter dial except as other wise specified Pressure gauges shall be installed on the low pressure side of each pressure reducing valve on the suction and discharge side of each pump on inlets and outlets of heat exchangers on the feedwater heater and where shown or required for proper operation Pressure gauge shall be installed on each boiler and shall have a 254 0 mm 10 inch dial 304 8 mm 12 inch dial face Gauges shall be installed so as to be accessible and easily read from the operating floor Gauges shall be equipped with integral or separate siphons and pulsation dampeners and shall be connected by brass pipe and fittings with shutoff cocks Where pressure reducing valves are used upstream and downstream gauges shall be placed close to the pressure reducing assembly but connected approximately 3 m 10 feet therefrom The operating ranges of the gauges shall be approximately twice the normal operating pressure Zee THERMOMETERS Thermometers shall be bimetallic type with stainless steel case and stem separable stem separable thermowells and temperature range suitable for the use encountered Thermometers shall be installed in the f
30. all dust in unloading ash and dust from the ash storage silo No water shall be added to the ashes in the conveyor or in the storage bin The dustless unloader shall add water to the ash in controlled quantities so that no SECTION 23 70 01 00 10 Page 96 surplus water runs or drips from the ash after discharge The discharged ash shall be muddy but loose and free flowing Water valve shall open only when drive motor is running Unloader shall have a capacity of not less than 27 metric tons 30 tons of conditioned ash per hour The rotating unit shall be designed so that all bearings are located on the outside and not in contact with the material handled Platform shall be provided for access to unit and shall have a handrail and a safety ladder to grade Motor shall be totally enclosed type for outdoor operation Motor starter shall be manual magnetic across the line reduced voltage start type with weather resistant water tight dust tight enclosure 2 311356 Conveyor Type Ash Handling System kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE When specifying boilers with capacity greater than 4 1 Megawatts 14 million Btuh per boiler the following paragraphs will be edited kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk Ash pits shall be funnel shaped constructed of 6 2 mm 1 4 inch steel plate minimum and covered with a he
31. are present Comments suggestions and recommended changes for this guide specification are welcome and should be submitted as a Criteria Change Request CCR kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkxkk PART 1 GENERAL 1 1 REFERENCES kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This paragraph is used to list the publications cited in the text of the guide specification The publications are referred to in the text by basic designation only and listed in this paragraph by organization designation date and title Use the Reference Wizard s Check Reference feature when you add a RID outside of the Section s Reference Article to automatically place the reference in the Reference Article Also use the Reference Wizard s Check Reference feature to update the issue dates n ECTION 23 70 01 00 10 Page 8 References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk The publications listed below form a part of this specification to the xtent referenced The publications are referred to within the text by the basic designation only ACOUSTICAL SOCIETY OF AMERICA ASA ASA S1 13 2005 R 2010 Methods for the Measureme
32. based on the following Boilers having output capacities of 3 5 Megawatts 12 000 000 Btuh or more will be equipped with mechanically driven grates operating continuously or intermittently Dump grates will not be permitted in boilers in this size range Spreader stokers will be specified for watertube boilers using bituminous coal with ash content on a dry basis in excess of 8 percent or ash fusion temperature lower than 1204 degrees C 2200 degrees F Underfeed or pulsating grate stokers may be wn ECTION 23 70 01 00 10 Page 30 2 6 5 Coal and Sorbent Feed Systems All equipment required to provide a boiler feed system to convey coal and sorbent to the boiler injection inlets shall be furnished All components of these systems shall be sized to provide flow of fuel and sorbent based on MCR condition in the boiler and the design coal and sorbent specified The system shall be designed to minimize the segregation or generation of fines 262521 AFB Coal Feed System Coal feed systems for AFB may be either pneumatic under bed or spreader stoker over bed For pneumatic under bed feed systems a feed point every 1 7 to 2 3 square meters 18 to 24 square feet shall be provided The system shall consist of a complete integrated system including weigh belt feeder lock hoppers and or other components necessary for the pneumatic fuel injection system Rotary type feeders shall not be used as the primary pressure sealing device
33. be used in conjunction with an inverted bucket type steam trap previously described e Float and Thermostatic Trap These traps provide optimum performance on modulating systems at lowest first cost Where steam pressures modulate down to zero large amounts of air may be liberated They are ideal for dripping ends of steam risers heels of up feed steam risers bottoms of down feed steam risers These traps are also ideal for fan coil units and unit heaters f Any trap selected must be sized for the expected condensate load with an applicable safety factor applied for the particular type of equipment serviced Manufacturer s application manuals should be consulted to assist in sizing traps Safety factors vary from 2 1 to 10 1 An average 3 1 safety factor value will cover most applications wn ECTION 23 70 01 00 10 Page 67 Zin Sly We eS Pump Unit kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Where characteristics of the fly ash require additional treatment a water spray shall be incorporated in the filtering unit If not required delete the portion included in the brackets Air discharged to the atmosphere must meet the local air pollution standards kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Vacuum or vacuum pressure pump unit shall be sized to match system design requirements Pump unit shall be liquid ring type having round rotor with curved blad
34. by flanges fastened to concrete ledge continuously around the hopper with the concrete forming the top portion of hopper sides Track girders shall consist of wide flange beams conforming to the AREMA Eng Man for loading plus impact They shall be complete with bearing plates WF cross struts and rail clips Top of hopper shall be fitted with properly sized sections of grating made with steel bars sized by J mm inches and cross rods mm inches in diameter to form openings mm inches square 24 30 ba L Hopper Gates A rack and pinion gate shall be provided at each hopper outlet and shall be a self cleaning type Hand Motor operated sliding plate shall be 9 5 SECTION 23 70 01 00 10 Page 86 mm 3 8 inch thick carbon steel formed into the shape of a winged U The gate plate surface shall be completely protected by an overlapping liner of 3 2 mm 1 8 inch thick ASTM A167 Type 304 stainless steel The gate body material except for the dust cover shall be of 4 5 mm 3 16 inch thick ASTM A167 Type 304L stainless steel where in contact with coal flow 2307 62 Hopper Feeders The vibrating or belt feeders of manufacturer s standard design shall be provided for the service required Motor shall be totally enclosed nonventilated totally enclosed fan cooled type totally enclosed fFan cooled type suitable for installation in a Class II Division 1 Group
35. drive The motor starter shall be manual magnetic across the line reduced voltage start type with general purpose weather resistant water tight dust tight explosion proof enclosure 2 30 6 Gravimetric Weigh Feeder The weigh feeder shall be a metering belt type device designed to operate at a variable rate ranging from 10 percent of maximum capacity to metric tons hour tons hour Flow rate shall be automatic A silicon controlled rectifier dc drive shall automatically adjust the belt speed to maintain the rate of material flow as set on the controller The weigh feeders shall meet or exceed the requirements of NIST HB 44 Southern Eastern Western Weighing and Inspection Bureau They shall have an accuracy of 1 2 of 1 percent of flow rates over their total variable rated capacity The feeder shall be provided with a flexible boot for connecting the gate to the feeder inlet chute which in turn shall be flared to produce a feed opening tapering from wide to wide with the direction of flow of material The belts for feeders shall meet RMA IP 1 requirements conforming to the Conveyor and Elevator Belt Handbook fire resistant type conforming to the standards of Part 18 65 of the 30 CFR 1 Top belt cover thickness shall be 6 4 mm 1 4 inch with bottom cover 3 2 mm 1 8 inch thick Belt edges shall have minimum 25 mm 1 inch flanges and shall be sealed by carrying the cover around the carcass edges during manufacture
36. dust tight in operation 2307 Track Hoppers Track hoppers shall be standard double hopper design with a belt or vibrating type feeder as indicated The hoppers shall have a capacity of approximately metric tons tons and shall be constructed of not less than 9 5 mm 3 8 inch thick Type 304L stainless steel plates with slopes of not less than 55 degrees and shall be stiffened with angles The hoppers may also be of ASTM A36 A36M mild steel minimum 6 4 mm 1 4 inch thick with replaceable liners 6 4 mm 1 4 inch thick ASTM A167 Type 304L stainless steel All rivets and field bolts inside the hopper shall have flat heads The hopper shall be suspended from the track girders by heavy bolts and cast washers or the sides shall be carried to the bottom of the track and supported by flanges fastened to concrete ledge continuously around the hopper with the concrete forming the top portion of hopper sides Track girders shall consist of wide flange beams conforming to the AREMA Eng Man for loading plus impact They shall be complete with bearing plates WF cross struts and rail clips Top of hopper shall be fitted with properly sized sections of grating made with steel bars sized by J mm inches and cross rods mm inches in diameter to form openings mm inches square 24 30 ba L Hopper Gates
37. full width of the grate A manual adjustment shall be provided to regulate the fuel bed thickness Ashes shall be automatically and continuously discharged to the ash pit The area under the grates shall be divided into not less than four airtight zones for forced draft supply and shall have suitable zone control dampers with external indicating operating and locking devices 4 4 1 Grates Grates shall be either air cooled or water cooled with grate bars in intimate contact with the watertubes Grates shall have individually replaceable sections of iron or steel suitable for the temperatures encountered Pressure parts including watertubes headers and valves shall be suitable for boiler pressure specified and shall be constructed in accordance with ASME BPVC SEC I Grate sections shall be properly designed for even air distribution over th ntire grate area 4 4 2 Stoker Controls Stoker controls shall be designed for connection to the combustion control system to accurately regulate the coal feed rate and shall be arranged for manual operation independent of the combustion control system Variation of coal feed rate shall be accomplished by changing the length of time of vibrations Vibration generator shall be belt connected or gear connected to the electric motor Unit shall be free of any vibration that may damage SECTION 23 70 01 00 10 Page 37 paragraphs will be deleted kkkkkkkk
38. gauge metal fiber or other approved material Sleeves shall be accurately located on center with the piping and shall be securely fastened in place The space between the sleeves and the pipe shall be caulked and filled with bituminous plastic cement or mechanical caulking units designed for such use n ECTION 23 70 01 00 10 Page 108 3 6 5 Fiberglass Reinforced Plastic FRP Pipe Field assembly of the pipe shall be done in conformance with the manufacturer s written instructions and installation procedures Several pipe joints having interference fit type couplings may be field bonded and cured simultaneously However the pipe shall not be moved nor shall additional joints be made until the previously laid joints are completely cured Joints not having interference fit type couplings shall be fitted with a clamp which shall hold the joint rigidly in place until the joint cement has completely cured The clamps shall have a protective material on the inner surface to prevent damage to the plastic pipe when the clamp is tightened in place The pipe shall be provided with a device or method to determine when the joint is pulled against the pipe stop A gauge provided by the pipe manufacturer shall be used to measure the diameter of the spigot ends to insure the diameter conforms to the tolerances specified by the manufacturer Al
39. inches Title Materials Specification Steam 1 Under 80 mm 3 Threaded Malleable iron ASME B16 3 inches Under 80 mm 3 Threaded Steel ASME B16 11 inches 80 mm 3 inches Flanged Steel ASME B16 5 and larger 80 mm or larger Buttwelded Steel ASME B16 9 Condensate return Under 80 mm 3 Threaded Cast iron ASME B16 4 inches Black Class 250 Under 80 mm 3 Threaded Malleable iron ASME B16 3 inches Class 300 Under 80 mm 3 Threaded Bronze ASME B16 15 inches 80 mm 3 inches Buttwelded Steel ASME B16 9 and larger Vent pipe Under 80 mm 3 Threaded Malleable iron ASME B16 3 inches 80 mm or larger Buttwelded Steel ASME B16 9 Exhaust pipe Under 80 mm 3 Threaded Zinc coated ASME B16 3 inches malleable iron 80 mm 3 inches Buttwelded Steel ASME B16 9 and larger Boiler feed 2 Under 80 mm 3 Threaded Malleable iron ASME B16 3 inches 80 mm 3 inches Buttwelded Steel ASME B16 9 and larger Feedwater pipe Under 80 mm 3 Threaded Malleable iron ASME B16 3 inches 80 mm 3 inches Buttwelded Steel ASME B16 9 and larger Blowoff lines 2 Al1 Buttwelded Steel ASME B16 9 Socket welded Steel ASME B16 11 Flanged with Steel ASME B16 5 long radius elbows Water column Under 80 mm 3 Threaded Malleable iron ASME B16 3 piping 2 inches Fuel oil All Threaded Malleable iron ASME B16 3 Flared or brazed Cast or wrought ASME B16 18 bronze ASME B16 26 n Plastic ECTION 23 70 01 00 10 FRP Page 112 Compatible with pipe API Spec 15LR
40. inspection doors giving access to the drive sprocket cleaner and wear surfaces Chain tension is achieved by a screw take up Each discharge opening shall be provided with rack and pinion operated gates with hand wheels motor operated air operated Motor shall drive conveyor through a speed reduction unit which is either direct connected or roller chain connected to the drive shaft Motor shall be totally enclosed nonventilated type totally enclosed fan cooled type totally enclosed fan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with general purpose weather resistant water tight dust tight explosion proof enclosure Conveyor frame shall be constructed essentially as indicated with support and additional bracing as required for rigidity Integral size motors shall be the SECTION 23 70 01 00 10 Page 92 premium efficiency type in accordance with NEMA MG 1 peor ASH HANDLING SYSTEM edb Boiler Room Ash Handling System kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE When specifying boilers with capacity of 4 1 MW 14 000 000 Btuh per boiler or less this paragraph and subsequent paragraphs will be deleted except applic
41. installed to permit free expansion without placing undue stress on the boiler or refractory Insulation and jacket shall provide a casing temperature not exceeding 77 degrees C 170 degrees F in an ambient temperature of 38 degrees C 100 degrees F with a surface wind velocity not exceeding 254 0 mm second 50 fpm while operating at full load PAP ROTTS AES Watertube Waterwall Type kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE On watertube type boilers that will be used intermittently welded wall construction is recommended to minimize corrosion In other applications or with fuels containing not more than 0 5 percent sulfur a casing type enclosure is suitable kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Boiler walls shall be steel encased wall construction with fabrication details as recommended by the boiler manufacturer Boiler wall and boiler roof lining shall consist of a continuous screen of closely spaced finned tangent or intermittent watertubes Steel encased walls shall have casing constructed of not thinner than 3 416 mm 10 gauge black steel sheets either bolted or welded Casing shall be gas tight and shall be reinforced with structural steel to provide rigidity and prevent buckling Provision shall be made for expansion and contraction Refractory behind the waterwall tubes shall be high duty refractory not less than 63 5 mm 2 1 2 inches thick
42. iron Structural framing as required shall support the stoker and its components from the boiler foundation or boiler room floor At the end of the grate the ash shall be discharged into a bunker or pit as indicated The bunker shall have a dust tight enclosure made of steel plates not less than 15 9 mm 5 8 inch thick properly protected with firebrick where exposed to the furnace shall be fitted with cast iron refractory lined inspection and access doors and shall have provisions for ash removal 4 4 Vibrating Grate Stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Any paragraphs describing stoker equipment not necessary for the system specified will be deleted kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Vibrating grate stokers shall be the grate level feed forced draft type with the vibrating action of the grate used to feed the coal from the hopper through the furnace and discharge the ashes into the ash pit Stokers shall be complete with hopper feed gate grate drive mechanism and all necessary auxiliary equipment Coal shall be automatically fed from the hopper onto the grate and shall be evenly distributed across the full width of the grate A manual adjustment shall be provided to regulate the fuel bed thickness Ashes shall be automatically and continuously discharged to the ash pit The area under the grates s
43. is free of any accumulation of combustibles The burner control system shall also supervise the operation of the fuel air equipment associated with the pulverizer and fuel oil burners The system shall accept operator commands and if the required permissives are met perform the required operation Equipment shall be continuously monitored and any deviation shall be alarmed while the system either corrects the deviation or shuts down equipment as necessary to avoid hazardous furnace conditions or equipment damage The system shall monitor the operation of the fuel equipment and if the equipment fails to respond to commands from the burner control system th quipment trip sequence shall be initiated Indications shall be provided to allow the operator to determine th quipment which initiated a trip of fuel equipment Tripped equipment shall be successfully shut down before reset of the trip is permitted The burner control system shall include a fuel safety subsystem which shall include a master fuel trip MFT system ignitor fuel trip system and pulverizer mill trip systems Each system shall include a hardwired relay which may be directly operated from the operator insert panel Inputs to the MFT shall include in addition to those associated with the burner control those that are required to provide overall boiler protection Also the system shall interface with the combustion control system to position and monitor devices for startup and shutdo
44. k k oO Zak Fuel Flow Air Flow Type Combustion Control kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This paragraph will be used for spreader stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Fuel flow air flow type combustion control equipment shall be the proportioning and reset type and shall position the fuel feed or air flow and then adjust one to the other by a ratio controller operating from air flow and fuel feed The controls shall include fuel flow measuring elements and air flow measuring elements Separate fuel feed and air flow controllers shall be panel mounted along with a fuel to air ratio controller The air flow index shall be set by a measuring element in the air stream Systems controlling fuel and air by line shafting and mechanical connections will not be acceptable S ee Two Element Steam Pressure Steam Flow kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE If underfeed traveling grate or vibrating grate stokers are specified use this paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Two element steam pressure steam flow combustion control equipment shall be the proportioning and reset type and shall control the fuel feed or air flow either in parallel or series The controls shall include measuring
45. keep the sulfur oxides emission in compliance These systems shall feed over bed or in bed and may be gravity pneumatic or a combination Under bed coal feed systems shall be provided with coal dryers unless approved 2 02 5102 CFB Coal Feed Systems For CFB systems feed systems capable of providing the appropriate coal feed over the load range shall be provided These systems shall include weigh belt feeders rotary feeders screw conveyors or air swept feeders or gravity feed metered by weigh belt Rotary type feeders shall not be used as the primary pressure sealing device The fluidizing velocity in systems ranges from 4 3 to 9 1 m second 14 to 30 fps The design shall permit maintenance of full load with loss of a single feed point Screw conveyors shall be designed to operate continuously Sorbent feed for CFB systems shall be capable of providing the required proportion of sorbent over the load range These systems shall consist of a sorbent metering device weigh belt feeder and be fed by gravity pneumatic injection or air swept feeder The sorbent shall be fed in bed under bed or over bed and shall be fed separately from the fuel SECTION 23 70 01 00 10 Page 44 6 6 Fluidized Bed Combustion Area Parts subject to severe wear or deterioration shall be replaceable with a minimum of dismantling The fluid bed combustor shal
46. lugs and bolts for clamping and attaching anchor braces unless otherwise indicated Anchor braces shall be installed in the most effective manner to secure the desired results using turnbuckles where required Supports anchors or stays shall not be attached where they will injure the structure or adjacent construction during installation or by the weight of expansion of the pipeline FID Pipe Expansion Ie Bs SL Expansion Loops kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE Wherever possible provision for expansion of steam supply and return pipes will be made by changes in the direction of the run of the pipe or by field fabricated expansion bends kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Expansion loops shall provide adequate expansion of the main straight runs of the system within the stress limits specified in ASME B31 1 The loop shall be cold sprung and installed where indicated Pipe guides shall be provided as indicated Except where otherwise indicated expansion loops and bends shall be utilized to absorb and compensate for expansion and contraction instead of expansion joints 30 Oa 2 Expansion Joints kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE If expansion joints are not required this paragraphs will be deleted Where space limitations prevent such provisions for ex
47. mm 0 025 inch thick corrosion resistant steel or sheet brass with enough small perforations to provide a net free area through the basket of at least 3 30 times that of the diameter of the entering pipe 27 10 Pipe Hangers Inserts and Supports Pipe hangers inserts and supports shall conform to MSS SP 58 except as modified herein a Types 5 12 and 32 shall not be used b Type 3 shall not be used on insulated pipe which has a vapor barrier Type 3 may be used on insulated pipe that does not have a vapor barrier if clamped directly to the pipe and if the clamp bottom does not extend through the insulation and the top clamp attachment does not contact the insulation during pipe movement c Type 18 inserts shall be secured to concrete forms before concrete is placed Continuous inserts which allow more adjustment may be used if they otherwise meet the requirements for Type 18 inserts SECTION 23 70 01 00 10 Page 80 d Type 19 and 23 C clamps shall be torqued in accordance with MSS SP 69 and have both locknuts and retaining devices furnished by the manufacturer Field fabricated C clamp bodies or retaining devices are not acceptable e Type 20 attachments used on angles and channels shall be furnished with an added malleable iron heel plate or adaptor f Type 24 may be used only on trapeze hanger systems or on fabricated frames g Where Type 39 saddle or Type 40 shield is permitted for a particular pipe a
48. of absorbing the normal operating axial lateral or angular movements or combination thereof The ball type joint shall be designed and constructed in accordance with ASME B31 1 and EJMA Stds where applicable Flanges shall conform to the diameter and drilling provisions of ASME B16 5 Molded gaskets furnished shall be suitable for the service intended a Zale Valves Valves shall be installed at indicated locations where specified and where required for proper functioning and servicing of the system Valves shall be of the pressure class shown Motor operated valves shall be capable of closing speeds of 2 5 to 5 1 mm sec 6 to 12 inches minute Motor operators shall be equipped with position indicators valve stem protectors above the motor operating units and auxiliary handwheels for manual operation of the valves in the event of power failure Motors shall be suitable for operation on the electrical current characteristics indicated 227 TEL Check Valves kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The designer shall indicate the type of valves vertical lift or horizontal on the drawings kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk a Valves for 125 pound class steel piping shall conform to the following 1 Sizes 65 mm 2 1 2 inches and less bronze MSS SP 80 Type 3 or 4 Class 125 2 Sizes 80 mm 3 inches throu
49. pneumatically electrically or electronically Pneumatic control systems shall conform to CAGI B19 1 Air filter regulator sets shall be installed at each control valve and transmitter in the system The master air filter regulator set on the control panel shall be of the dual type where one side can be cleaned and repaired while the other is in operation Exterior control air piping and devices shall be protected from freezing by use of a regenerative desiccant dryer Each system shall be provided with a selector switch or other means of manual control of the firing rate when required Electrical control devices shall be rated at 120 volts and shall be connected as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM Operating and limit controls shall be wired to interrupt the ungrounded circuit conductor Steam and energy generating equipment shall include instrumentation and sufficient metering for accountability interface with a future Energy Monitoring and Control System EMCS 8 1 Positioning Type Positioning type combustion control equipment shall be capable of maintaining boiler steam pressure within plus or minus 2 percent of the set pressure over the complete range of boiler operation The system shall maintain excess air within plus or minus 10 percent of the original control setting The efficiency will be maintained without appr
50. ppm Silica as SiO 2 ppm Calcium as Ca ppm Magnesium as Mg ppm Iron and aluminum oxides as Fe 2 O 3 Al 2 0 3 ____ ppm Bicarbonates as HCO 3 ___d s ppm Carbonates as CO 3 _ ppm Hydroxides as OH _____ dsoppm Sulphates as SO 4 gt ppm Chlorides as C1 ppm Phosphates as PO 4 ppm Carbon Dioxide free CO 2 ppm Total hardness as Caco 3 ppm Total solids in solution c l ppr Volatile and organic matter ppm Suspended matter ppm Free acid ppm Color a pH Ee wn ECTION 23 70 01 00 10 Page 71 Constituents Numbers in parentheses are subscripts 2 24 2 2 Zeolite Zeolite shall be the high capacity polystyrene base sulphonic synthetic type Not less than cubic meter feet of zeolite shall be provided with each reactor tank Dian 2B Reactor Tank Reactor tank sizes shall be based on allowing a freeboard above the zeolit bed of not less than 50 percent of the zeolite bed depth and a maximum flow rate of 11 3 mL square meters per second one gallon square foot per minute for each 111 mm 4 3 8 inches of zeolite bed depth 2 24 2 4 Softening System The softening system shall be complete with all piping control and power wiring A complete initial charge of rock salt shall be installed in the brine tank as recommended by the softene
51. sediment basket The basket shall be not less than 0 63 mm 0 025 inch thick corrosion resistant steel or sheet brass with enough small perforations to provide a net free area through the basket of at least 3 30 times that of the diameter of the entering pipe 27 10 Pipe Hangers Inserts and Supports Pipe hangers inserts and supports shall conform to MSS SP 58 except as modified herein a Types 5 12 and 32 shall not be used b Type 3 shall not be used on insulated pipe which has a vapor barrier Type 3 may be used on insulated pipe that does not have a vapor barrier if clamped directly to the pipe and if the clamp bottom does not extend through the insulation and the top clamp attachment does not contact the insulation during pipe movement c Type 18 inserts shall be secured to concrete forms before concrete is placed Continuous inserts which allow more adjustment may be used if they otherwise meet the requirements for Type 18 inserts SECTION 23 70 01 00 10 Page 80 d Type 19 and 23 C clamps shall be torqued in accordance with MSS SP 69 and have both locknuts and retaining devices furnished by the manufacturer Field fabricated C clamp bodies or retaining devices are not acceptable e Type 20 attachments used on angles and channels shall be furnished with an added malleable iron heel plate or adaptor f Type 24 may be used only on trapeze hanger systems or on fabricated frames g Where Type 39 saddl
52. shown but not to exceed 75 m 250 feet Conveyor capacity shall be metric tons hour tons hour when handling coal with approximate weight of 800 kg cubic meter 50 pcf and with maximum lump size of mm inches diameter Maximum capacity shall be based on a chain speed not to exceed 813 mm second 160 fpm Chain shall be drop forged case hardened steel alloy of the single strand type with flights welded to the chain links or integral chain and flights type The hardness of the links shall be 500 600 BHN The conveyor casing shall be dust tight and shall be of 6 4 mm 1 4 inch thick ASTM A242 A242M high strength low alloy steel with 3 416 mm No 10 gauge cover of the same material The casing shall be provided with T 1 steel ASTM A514 A514M Type B removable liners The liners shall be 19 mm 3 4 inch thick on the bottom and 13 mm 1 2 inch thick on the sides 19 mm 3 4 inch T 1 steel wear bars shall be provided for the empty run of the conveyor Liners and wear bars shall be attached to the casing using countersunk stainless steel bolts with stainless steel nuts and washers Drive sprocket shall be heat treated induction hardened to a minimum depth of 6 4 mm 1 4 inch Drive shaft shall be heat treated designed and sized based on ANSI AGMA 6113 ANSI AGMA 6013 requirements Bearings shall be spherical double roller bearings A dust seal shall be provided where the drive shaft ends go through the casing The conveyor shall have inlet and outlet spouts
53. syste L of each component instrumentation to observe the removal mergency control for individual control ffectiv point for local manual instrumentation accordance with rating including control panels and devices tubed include controls for handling system Suitable safety inter permissive conditions L operat and tested to the maximum practical fully automatic and sequential operation of the ash These controls shall be designed so such as continuous monitoring and regulation of major system components portion thereof shall monitoring and control following functions ngle panel The operation of Override of the automatic control sequences ither remotely from the control center or local Emergency shutdown on a unit or system basis a b Selection of operating components lobe control panel and locally d Manual operation e fi The automatic controls for bo specified monitoring of the ash This equipment may be operated manuall have NEMA 12 rating in All outdoor components s will no Locks shall be incorporated to assure that proper have been met prior to changing the operating status Shutdown of the ash handling system L be automatically initiated unsafe conditions arise during operation of the system panel shall have pu m and also push butt The panel shall have suffic l operations and controls to perm Loc
54. units where condensate must be lifted to return lines located above the equipment They operate best at near full load conditions where loads do not vary over a wide range Before operation traps must be primed by filling them with water b Vertical Open Top Bucket Trap Trap construction is more complex than inverted bucket type but is suitable for applications having wide variation of load and pressure and is recommended for constant pressure systems Bucket sinks into condensate when condensate reaches top of trap and the discharge port opens After discharge the bucket floats on incoming condensate keeping the discharge port closed c Impact Operated Traps These traps depend on steam velocity to keep the disc closed As steam velocity decreases the disc lifts off the seat and allows flow of condensate These traps allow some steam leakage and do not vent air at low pressure They are not recommended for service lower than 70 kPa 10 psig or where back pressure may exceed 50 percent of inlet pressure These traps are less expensive and have poor performance in the presence of dirt d Thermostatic Traps These traps are bellows actuated and contraction of bellows at a few degrees below saturated steam pressure allows condensate air and noncondensable gases to be discharged As steam reaches the bellows the expansion of the bellows closes the discharge port These traps can also be utilized to vent air froma steam system and can
55. wide strip of sealant shall be run vertically along the inside of the longitudinal joint of the metal jacket from a point below the backup material to a minimum of 900 mm 36 inches above the roof If the pipe turns from vertical to horizontal the sealant strip shall be run to a point just beyond the first elbow When penetrating waterproofing membrane for floors the metal jacket shall extend from a point below the backup material to a minimum distance of 50 mm 2 inches above the flashing For other areas the metal jacket shall extend from a point below the backup material to a point 300 mm 12 inches above floor or when passing through walls above grade jacket shall extend at least 100 mm 4 inches beyond each side of the wall eon Del Pipes Passing Through Waterproofing Membranes In addition to the pipe sleeves referred to above pipes passing through roof or floor waterproofing membrane shall be provided with a 1 8 kg 4 pound lead flashing or a 448 g 16 ounce copper flashing each within an integral skirt or flange Flashing shall be suitably formed and the skirt or flange shall extend not less than 200 mm 8 inches from the pipe and shall set over the roof or floor membrane in a troweled coating of bituminous cement The flashing shall extend up the pipe a minimum of 250 mm 10 inches above the roof or floor The annular space between the flashing and the bare pipe or between the flashing and the metal jacket covered i
56. wiring valves piping and other appurtenances Wiring and piping within the panel shall be color coded or otherwise identified 29 2 Indicators Indicator shall be flush mounted with a vertical scale of 100 to 150 mm 4 to 6 inch length Indicators may be either electronic or pneumatic with zero adjustment receiving standard signals form locally mounted transmitters Scales shall be in engineering units with an accuracy of plus or minus 1 percent 2923 Recorders Recorders shall be servo mechanism type or multiple pen type Circular Strip chart type shall be provided Minimum chart width is 100 mm 4 inches Accuracy shall be plus or minus 0 5 percent Each pen shall have a separate scale calibrated in engineering units Chart drive shall be 120 volts ac One year s supply of chart paper shall be provided 9 4 Panel Display kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Steam flow meters will be specified for boilers having a continuous steam capacity of 4 540 kg 10 000 pounds or more per hour and shall be integrating type where indicated Feedwater meter will be provided on individual boilers not having steam flow meter kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk As a minimum the following parameters shall be displayed on the panel
57. 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be magnetic across the line reduced voltage start type with general purpose dust tight explosion proof enclosure Stoker controls shall be for connection to the combustion control system to accurately regulate the coal feed rate Manual setting of the coal feed rate shall be possible without disconnecting linkage with variation of stoker feed as required to maintain any desired capacity between 25 and 110 percent of boiler capacity in 10 or more equal increments Regulation of the coal feed rate shall be by varying the time increments between strokes of the ram A throw out release shall protect the coal feeding mechanism from injury in case foreign materials obstruct normal operation SECTION 23 70 01 00 10 Page 34 2 An Del 3 Hoppers Hoppers shall be constructed of steel plates not less than 6 4 mm 1 4 inch thick and shall have a capacity of not less than kg pounds Hoppers shall be provided with clean out doors Stoker front plate shall form the front of the boiler for the full width of the boiler and extend from the firing floor to some point above the stoker where it shall connect to the boiler structural framing Front shall be cast iron or steel plate refractory lined with auxiliary firing doors and clean out doors of refractory lined cast iron Structural framing as required shall support the stoker and its com
58. 3 410 01 or UFC 3 410 02 If water softening is not required delete the paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk A single double unit automatic water softener system shall be provided as indicated The system shall be designed for a working pressure of Pa psig The system shall be complete with raw and regenerate water distribution under drain inlet and outlet connection in upper and lower header respectively resin removal connecting pipe legs control valve for service backwash regenerate and rinse water meters pressure gauges brine storage and measuring tank and controls for automatic SECTION 23 70 01 00 10 Page 70 operation Brine tank shall b ither hot dipped galvanized after fabrication or polypropylene Brine piping shall be either all copper pipe and fittings or Schedule 80 PVC The equipment shall have a total capacity between regenerations of not less than liters gallons of water of grams grains hardness when operating at a sustained softening rate of L second gpm The system shall be based on the data below Test sets shall be provided for pH comparator for the range TOEO sulfite comparator and phosphate comparator 24 Aw Water Analysis The source of the raw water is The analysis of the water is approximately as follows Constituents Sodium as Na
59. 301 4 4 Silo Level Controls A normal high level and emergency high level control switch shall be mounted at the top of the silo to shut off the feeding system when the silo is full of coal A low level switch shall be furnished at the low level of the silo s live storage shelf as indicated to signal by light that coal is at a low level in the live storage compartment Switches shall also be furnished near the bottom of the silo as indicated to signal by light that coal is at a low level in the reserve storage compartment Switches shall be for Class II Division 1 Group F hazardous location in accordance with NFPA 70 30 15 Coal Crusher kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The designer shall select the appropriate type of crusher based on the throughput requirements and an economic analysis kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Coal crusher shall be roll crusher hammermill granulator impactor designed to reduce run of mine or lump coal to a maximum lump size of mm inches Crusher shall have a minimum capacity of metric tons hour tons hour when handling average size bituminous coal Housings shall be made of heavy castings or welded heavy steel plate Interior of the housing shall have replaceable liners constructed of abrasion resistant steel Breaker plate grates rolling rings swing hammers and other parts of
60. 69 36 Pilot Lights Pilot lights shall be assembled in a factory built cabinet suitable for flush mounting in cutouts in boiler control panel complete with extruded trim clamps and sheet metal rear housing and finished in baked black enamel Lens shall be white plastic and engraved in black ink Lettering shall be 19 mm 3 4 inch high and black Two lamps per pilot shall be provided and independently wired Lamps shall be 6 watts 24 volts dc S 6 incandescent type supplied with color caps one red and one green per pilot light Lens bezels shall be black unless otherwise indicated eed Clock The clock shall be electric synchronous motor type The clock shall be for surface mounting and suitable for operation on 115 volt 60 Hz single phase electric service The clock shall have a white dial easy to read black numerals black hands red sweep second hand and external manual reset knob at bottom of case The motor gear train shall be sealed ina permanent oil bath The clock dial shall be 381 0 mm 15 inch size 98 Alarm Annunciator Panel Layout of annunciator panel shall be as shown Panel shall consist of a flush mounted cabinet mounting trim with clamps removable rear cover and alarm modules Cabinet shall be finished with black baked enamel aluminum trim and black alarm bezels Nameplate size of alarm modules shall be nominal 70 mm 2 3 4 inches high by 75 mm 3 inches wide in translucent white acry
61. 95 degrees C 1 700 to 2 000 degrees F In addition to allow for expansion of the inner face a series of 3 2 mm 1 8 inch wide vertical openings spaced 1 8 m 6 feet apart shall be provided on the furnace side of the wall Proper provision shall be made for expansion and contraction between boiler foundation and floor 349 39 Firebrick Firebrick shall be laid up in air setting mortar Each brick shall be dipped in mortar rubbed shoved into its final place and then tapped with a wooden mallet until it touches the adjacent bricks Mortar thick enough to lay with a trowel will not be permitted Maximum mortar joint thickness shall not exceed 3 2 mm 1 8 inch and average joint thickness shall not exceed 1 6 mm 1 16 inch SECTION 23 70 01 00 10 Page 26 be provided with suitable cleanout doors Coal feed to the hoppers shall be fitted with concave type transitions to ensure the proper distribution of coal and coal fines across the width of the hoppers Stoker frame shall be constructed of cast iron cast steel or forgings and all parts of the stoker except the grates shall be properly cooled or otherwise protected from the furnace heat to prevent damage by warping or undue expansion Furnace arrangement and shape shall be as recommended by the stoker manufacturer to ensure proper combustion of the fuel Stoker front plate shall form the front of the boiler for the full width of the boiler and extend from the firi
62. ATIONS References are in agreement with UMRL dated October 2015 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk SECTION TABLE OF CONTENTS DIVISION 23 HEATING VENTILATING AND AIR CONDITIONING HVAC SECTION 23 70 01 00 10 CENTRAL STEAM GENERATING SYSTEM COAL FIRED 01 08 PART 1 GENERAL EFERENCES UBMITTALS UALITY ASSURANC Welding Use of Asbestos Products ELIVERY STORAGE AND HANDLING XTRA MATERIALS GI HINOJ 6a e a a a S H E aS E w PART 2 PRODUCTS GI MATERIALS AND EQUIPMENT sE Standard Products A Nameplates 23 Prevention of Rust Equipment Guards and Access ERS Capacity Electrical Equipment sI otor Ratings az otor Starters Boiler Design Requirements al Radiant Heating Heat Input Combustion Gas Ash Discharge Radiant Heating Surface Furnace Volume Boiler Operating Capacity Boiler Output Capacity Boiler Markings DETAILS 22 3 Packaged Steam Generating Units Qed PA ond Firebox Type for Boiler Capacities Less Than 2 9 Mega watts 10 000 000 Btuh PPP W e O 2 E NNNNNNN NN NNNNNNNNNNNN DN NH NNNNNNNNNWNHNDNDN EF HWWWWW WW WwW Ww N Ww wW O 7 VHoOOM IHD UAW WP n ECTION 23 70 01 00 10 Page 1 Type of Bucket Elevator Linear Velocity meters per second fpm Continuous bucket 0 508 0 686100 135
63. Equipment Ls Test for Steam Purity and Water Level Stability Bio 13651 Conductivity Tests for Boilers without Superheaters 8 13 6 2 Conductivity Test Boilers with or without Superheaters Bi 13 683 Water Level Stability Test End of Section Table of Contents n ECTION 23 70 01 00 10 Page 7 Expansion Loops Expansion Joints Valves ED PIPING INSTALLATION Protective Coating for Underground Steel Pipe Cleaning of Surfaces to be Coated Coating Materials pub Bituminous Pipe Coating T2 Polyethylene Pipe Coating 23 Tape Wrap Pipe Coating 4 Epoxy Coating System Bro Coating Inspection and Testing Installing Buried Piping Fiberglass Reinforced Plastic FRP Pipe ok Installation a2 Thrust Blocks 23 Curing of Field Bonded Joints 4 Metal to FRP Connections Buried Fuel Piping CATHODIC PROTECTION FIELD PAINTING CLEANING OF BOILERS AND PIPING FOR TESTING tok Boiler Cleaning 2 Boiler Water Conditioning 10 MANUFACTURERS FIELD SERVICES mae il FIELD TRAINING L2 FRAMED INSTRUCTIONS TESTS 1 Hydrostatic Tests 3 2 Efficiency and Operating Tests SaL Test of Fuel Burning Equipment 3313 4 Test of Deaerating Feedwater Heater 3 5 3 6 NO Fr wW Gq w an WWW OD W WW WW Ww w 3 3 5 5 DWWWWD DW WW WW DD DD DDDADHDUBPAAAAIAHAWNE Ww Ww WWW Oo nx7 WwW WWW Ww 36 LS x38 13 Test of Water Treatm
64. F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with weather resistant dust tight explosion proof enclosure 30 8 Truck Hoppers Truck hoppers shall be of standard double hopper design with a belt or vibrating type feeder as indicated The hoppers shall have a capacity of approximately metric tons tons and shall be constructed of 9 5 mm 3 8 inch thick Type 304L stainless steel plates minimum with slopes of at least 55 degrees and shall be stiffened with 6 4 mm 1 4 inch angles minimum The hopper may also be of ASTM A36 A36M mild steel minimum 6 4 mm 1 4 inch thick with replaceabl liners 6 4 mm 1 4 inch thick ASTM A167 Type 304L stainless steel Rivets and field bolts inside the hopper shall be flat head type The hopper shall be supported by a flange fastened to the concrete ledge continuously around the hopper with the concrete forming the top portion of hopper sides Top of hopper shall be fitted with properly sized section of bar grating made with by mm inch mild steel bars and mm inch diameter cross rods to form openings mm inches square A supporting beam not less than mm inches deep kg meter pounds foot in a wide flange member shall be provided under the grating ESLOS x Hopper Gates A rack and pinion gate shall be provided at each hopper outlet and shall be
65. H ee R N E E NNN N N J NNN NNN 530 Zz 2 2 30 2 2 3 2 30 2 30 2 2i Fan Regulation Steam Valve Regulation nsion Joints ts n Joints 24 2 6 Treated Water Storage Tank BUILDING HEATING EQUIPMENT sL Unit Heaters wore it General 256122 Propeller Type Unit Heater Zoe d eS Cabinet Unit Heaters 25 1 4 Heating Elements 25145 Manual Selection Switches 2596156 Automatic Operation 225 edie Qed Thermostatic Control by 2 206M OZ Thermostatic Control by 2 Radiator and Convector ATR COMPRESSOR UNITS 1 Service Air Compressors 2 Instrument Air Compressors PIPING 1 Pipe v2 Fittings 33 Nipples 4 Unions 5 Pipe Threads 6 Expansion Joints 27 6 1 Guided Slip Tube Type Expa 2162 Bellows Type Expansion Join 216 3 Flexible Ball Type Expansio SS Valves hed ad Check Valves Libs lg Gate Valves eZ basal 63 Globe Valves and Angle Valv LZ hw Steam Pressure Reducing Val Pad fared ee Thermostatic Regulating Val 27 7 6 Back Pressure Relief Valves 2067947 Boiler Automatic Feedwater 8 Exhaust Heads 39 Strainers 10 Pipe Hangers Inserts and Sup INSULATION TOOLS vel Tube Brush s2 Smoke Pipe Cleaner ars Firing Tools 4 Wrenches and Gaskets COAL HANDLING EQUIPMENT Sal Screw Conveyor Belt Conveyor Flight Conveyor Bucket Elevators Vibrating Conveyor Gravimetric Weigh Feeder Z Track Hoppers IO ere Hopper G
66. MA ENGIN T B T EUM INSTITUTE API 2001 R 2013 Specification for Low Pressure Fiberglass Line Pipe and Fittings 2010 Errata 2011 Centrifugal Pumps for Petroleum Petrochemical and Natural Gas Industries RING AND MAINTENANCE OF WAY ASSOCIATION 2012 Manual for Railway Engineering AMERICAN WATER WORKS ASSOCIATION AWWA C203 C213 C700 ASME INT ERNATIONAL B1 20 1 B1 20 2M ASM Gl 2008 Coal Tar Protective Coatings and Linings for Steel Water Pipelines Enamel and Tap Hot Applied 2015 Fusion Bonded Epoxy Coating for the Interior and Exterior of Steel Water Pipelines 2015 Standard for Cold Water Meters Displacement Type Bronze Main Case 2013 Pipe Threads General Purpose Inch 2006 R 2011 Pipe Threads 60 Deg General Purpose Metric 2011 Forged Fittings Socket Welding and Threaded 2013 Cast Copper Alloy Threaded Fittings Classes 125 and 250 2012 Cast Copper Alloy Solder Joint Pressure Fittings 2011 Nonmetallic Flat Gaskets for Pipe Flanges 2013 Standard for Cast Copper Alloy Fittings for Flared Copper Tubes 2011 Malleable Iron Threaded Fittings Classes 150 and 300 2013 Valves Flanged Threaded and Welding End 2014 Standard for Malleable Iron Threaded Pipe Unions Classes 150 250 and 300 SECTION 23 70 01 00 10 Pa
67. Minimum straight pipe runs shall be in accordance with AGA XR0603 Condensate pots shall be provided for steam service 2 9 11 Flue Gas Opacity Monitor A flue gas monitoring system shall provide continuous measurement indication and recording of smoke opacity from each boiler The stack units shall include a light source and a light detecting or receiving unit mounted in the stack or main breeching as recommended by the manufacturer The control or transmitter unit shall have electronic solid state circuitry and meter or digital type indicator and provide an output signal of 4 to 20 mA de for 0 to 100 percent opacity In addition the control unit shall have calibration and alarm adjustments for compliance with Federal State and local environmental regulations The control or transmitter unit and recorder shall have dust tight metal enclosure A purging air system shall be provided to clean light source lens and light detector lens The control unit shall have adjustable alarm output contacts for various smoke densities Zi De d2 Sample Cooler Sample cooler shall be a water cooled shell and tube or shell and coil type heat exchanger with stainless steel tubes and cast iron or steel shell suitable for cooling the blowoff before sampling The cooler shall be connected to a header and valved so that the operator can obtain a sample of properly cooled blowoff from any boiler as desired The cooler shall be properly
68. NDNDN EF HWWWWW WW WwW Ww N Ww wW O 7 VHoOOM IHD UAW WP n ECTION 23 70 01 00 10 Page 1 2 Sheds 2 Watertube Waterwall Type Boiler Capacities Over 2 9 Mega watts 10 000 000 Btuh 2 Watertube Boilers Drums Tubes Baffles Access Doors Miscellaneous Pipe Connections Superheater Design Boilers and Firing Equipment oiler Settings Boiler Material ik Firebrick Insulating Brick Castable Refractory Mortar Air Setting Refractory Brick Common 1 Galvanized Steel Sheets Ls cf Uncoated Steel Sheets and Strips Low Carbon Firebox Packaged Type Watertube Waterwall Type Boiler Roof Bridge Walls Settling Chamber Expansion Joints Firebrick Plastic Refractory Watertube Waterwall Packaged Type Unit oiler Fittings and Appurtenances Water column Water Gauge Low Water Cutoff Bypass Button Steam Gauge Feed and Check Valves Continuous Blowdown Valve Safety Valves Blowoff Valves 10 Steam Nonreturn Valve aLI Feedwater Regulator 12 Soot Blowers ER EQUIPMENT Spreader Stokers Spreader Stoker Grates Traveling Grates Vibrating Grate Stoker Controls Hoppers Over Fire Turbulence and Cinder and Dust Reinjection System nderfeed Stokers Single Retort Heavy Duty Ram Type Stokers SL Grate Surface 2 Ram Feed rac Hoppers Single Retort Screw Type Stokers onveyor Stokers Grates Grate Operation Hoppers NM NMNNN DN NH NWNNNNNNDNDN W Nos WN WWW WW Ww WWWWWWWWWWW WWW WwW WwW W
69. Positive discharge 0 610 120 Max with the shaft diameters in accordance with s ittings Foot shaft shall have screw tak u ct haft to prevent any backward motion of the manufacturers hafts shall be mounted in roller bearings with forced type standards he head shaft and foot shaft shall be constructed of cold rolled steel Both lubricating up with adjustment of not less lled on the head han 225 mm 9 inches An automatic backstop shall be insta chain Boot plates loading tor self supporting flat casing legs of continuous bucket elevator and bottom plate of stub discharge chute shall be 4 8 mm 3 16 inch thick minimum All other members shall be 2 657 mm 12 gauge steel thick minimum Corner ang stiffeners shall be provided to make the eleva addition the elevator shall be tied to the adjoining structure at cl enough spacing to increase the rigidity of the elevator les and In lose The boot section shall be provided with clean out doors as well as front and back removable panels An inspection door large enough to remove a bucket of the chain shall be provided in the intermediat level The elevator shall be driven by an el suitable housing at the top of the flight enclosed nonventilated totally enclosed enclosed fan cooled type suitable for installation in a Class II Motors shall be fan cooled type t
70. TE Steam driven boiler auxiliaries will not be used unless the exhaust steam can be utilized completely Reference to steam drives will be deleted if inapplicable for the equipment specified kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Grates for spreader stoker firing shall be of the high air resistant type especially designed and arranged for powered mechanical or compressed air SECTION 23 70 01 00 10 Page 31 2 3422 Tubes Tubes shall be not less than 50 mm 2 inches in diameter shall be electric welded or seamless steel and shall be connected to the drums and headers by expanding into bored tube seats Boilers shall have water cooled furnace walls of a design suitable for the application Lower header of sidewalls shall be round design with tubes welded to header stubs Each waterwall header shall have enough supply and riser tubes to ensure that no portion of the waterwalls will become water starved at maximum capacity 223 263 Baffles Baffles shall be arranged to bring the products of combustion into contact with the heating surfaces without excessive loss of draft Baffles shall be gas tight and shall b ither a refractory material or metal suitable for temperatures encountered 2 3 2 4 Access Doors Access doors in sufficient number of adequate size and properly located shall be provided for cleaning inspection and repair of all areas in the complete assembly Doors s
71. The test shall not commence until the procedure has been approved Submit complete plan for water treatment including proposed chemicals to be used and nationally recognized testing codes applicable to the system prior to system startup Piping shall be welded in accordance with qualified procedures using performance qualified welders and welding operators Procedures and welders shall be qualified in accordance with ASME BPVC SEC IX Welding procedures qualified by others and welders and welding operators qualified by another employer may be accepted as permitted by ASME B31 1 The Contracting Officer shall be notified 24 hours in advance of tests and the tests shall be performed at the work site if practicable The welder or welding operator shall apply his assigned symbol near each weld he makes as a permanent record Structural members shall be welded in accordance with Section 05 05 23 16 STRUCTURAL WELDING Welding and nondestructive testing procedures are specified in Section 40 05 13 96 WELDING PRESSURE PIPING 34 2 Use of Asbestos Products kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE The first clause in brackets should be used when it is known that substitutes are available for any asbestos products which might be included with the equipment The second clause in brackets should be used when it is possible or definitely known that asbestos produc
72. able portions kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk The ash handling system shall be the dry pneumatic type in stoker fired boilers This system shall gather ash from the boiler forward ash discharge grate hopper and from economizer air preheater ash discharge hopper and other filtration systems and shall discharge to the ash storage silo located outside of the building Th ntire system shall be coordinated to fit the equipment supplied Ash dust control conditioners shall be used to reduce fugitive dust emissions during discharge of ash from the storage silo Pio edyn L Ash Hopper Ash removal hopper for each boiler shall be constructed of 6 4 mm 1 4 inch thick steel plate minimum with suitable external structural steel supports for connection to boiler ash hopper and necessary internal anchors for holding refractory lining in place Refractory lining shall be 225 mm 9 inches thick on vertical walls and 150 mm 6 inches thick on feed plates Each hopper shall be furnished with a sliding ash gate Each boiler sliding gate unit shall be provided with an access compartment to allow gathering and cooling of ash A cast iron grate shall be provided along with a manually operated air tight inlet valve for feeding ash into the pneumatic gathering line A hinged steel access gate shall be provided at each compartment Spring loaded air intakes shall be provided at the end of each header The structural inte
73. al control statio ion shall also be provided switches shall be provided so tha test and maintenance purposes shall be controlled by a microprocessor based con programmable controller or an electromechanical system for location indoors shall NEMA ICS 1 in accordance with NEMA ICS 1 ns at each ash remov Local select y he bottom ash system rol system a solid All controls hall have NEMA 4 sh ons ient it al or for state and that manual step t be required or should Facilities fo with alarms Manual start of the automatic control operations both at the ash handl d All major equipment components shall be factory mounted prewir extent The system shall S E L of the ash handling system shall be provided for the ing ly Status monitoring at the ash handling control panel of the operation of the ash handling system and its components ttom ash collection transport shall operate as When a start command has been manually initiated the automatic ash collection and transport sequences for the unit shall progress through their complete cycles automatically shut down complete with audio and visual alarms panel and af The th ter completion of th system shall include an annunciator system as part of the ash handling control The annunciator system shall receive inputs from devices and system cycles logic which shall indicate any o
74. all be belt width plus 150 mm 6 inches Drive pulleys shall be provided with 19 mm 3 4 inch thick vulcanized and grooved lagging Snub pulleys shall be provided with 9 5 mm 3 8 inch vulcanized smooth lagging All conveyor pulley shaft assemblies shall be supported by two heavy duty antifriction bearings having a minimum life expectancy of 50 000 hours for 90 percent of bearings in accordance with ABMA 11 for roller bearings The pulley diameter shall be sufficiently large to meet the requirements of the duck weight and ply of the belt to permit flexing of the belt around the pulley circumference without damaging the belt or shortening the belt life The conveyor shall be driven by a totally enclosed nonventilated type totally enclosed fan cooled type totally enclosed fan cooled type suitable for installation in Class II Division 1 Group F hazardous location in conformance with NFPA 70 electric motor connected to a drive shaft mounted speed reducer unit by a roller chain drive V belt drive flexible coupling The motor starter shall be manual magnetic SECTION 23 70 01 00 10 Page 83 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk USACE NAVFAC AFCEC NASA UFGS 23 70 01 00 10 January 2008 Preparing Activity USACE Superseding UFGS 23 70 01 00 10 October 2007 UNIFIED FACILITIES GUIDE SPECIFIC
75. all prevent destructive vibration during normal operation The furnace shall be of the balanced draft type The ducts and equipment from the forced draft fan including the fluidized bed plenums shall be designed for pressures in accordance with NFPA 85 Access and observation doors shall be provided to permit access to compartments and the observation of critical portions of the furnace and fluid bed Door frames shall be securely anchored Doors shall have a suitable durable gasket a device which when closed will force the door to an air or gas tight seal and an interior design which will minimize erosion or deterioration of the inner surface from exposure to the internal conditions at that point Refractory shall be an integral part of approaches in size 450 mm 18 inch wide by 400 mm 16 inch high All he door A ccess doors shall be the manufacturer s standard that observation ports and lance doors shall be provided with sealing and aspirating air facilities g b Pp c The convection pass velocity shall not be reater than ased on max lus five pe onvection p designs wher P b asses ave tween th 15 2 m second 50 fps The convection pass velocity shall be imum guaranteed excess air at Maximum Continuous Rating MCR rcentage points i e if excess air is 20 percent the ass velocity shall be based on 25 percent excess air In CFB e convection surface exists in th
76. and Fuel Piping The burners and burner equipment shall be suitable for continuous service Parts subject to severe wear or deterioration shall be replaceable with a minimum of dismantling All valves or controls shall be mounted outside the boiler front and air housing The burner design shall provide positive and uniform mixing of the air and fuel at all loads and shall produce sufficient turbulence to preclude stratification The burner design shall permit the firing of No 2 fuel oil In duct over bed burners shall be of the air atomizing type The burners and or ignitors shall have an aggregate capacity capable of bringing a cold unit up to ignition temperature using either precalcined limestone or spent bed material in 4 hours for AFBs and 8 to 12 hours for CFBs depending upon refractory limitations Equipment for remote positioning shall be furnished if required of each burner gun at either the fully retracted or fully inserted position The positioning equipment shall be air operated shall include limit switches to indicate the position of the gun and all necessary drives linkages and mechanisms and shall automatically purge the fuel from the guns before retracting 6 9 Air Distribution System The air distribution system shall provide uniform air distribution to the fluid bed under any mode of operation The system must also meet the mechanical and structural requirements of the boiler such as bed ma
77. and trip valve reed tachometer constant pressure type governor insulation with removable metal jacket oil sight glasses with guards stainless steel steam strainer that is removable without disconnecting piping any special wrenches and tools required for servicing the turbine and a sentinel warning on the exhaust casings Turbines shall conform to NEMA SM 23 16 1 6 Electric Motors Electric motors shall be selected for continuous duty and non overloading characteristics suitable for the power characteristics available Motors shall be splashproof totally enclosed nonventilated totally enclosed fan cooled type totally enclosed fan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in accordance with the NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with general purpose weather resistant water tight dust tight explosion proof enclosure Integral size motors shall be the premium efficiency type in accordance with NEMA MG 1 wd Og deh Shop Hydrostatic Testing All pumps shall be subjected to shop hydrostatic testing One pump in each service shall be subjected to a complete shop performance test to demonstrate that at rated capacity head is within a margin of plus 3 percent and minus 0 percent of design efficiency is within a tolerance of minus 0 percent NPSH a
78. anels shall not exceed 1 360 of the length of the maximum span The structure tested shall be capable of holding a pressure of 1 5 times the predicted maximum furnace operating pressure kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE For personnel safety the design temperature of the casing surface should not exceed 66 degrees C 150 degrees F Should the designer wish to use a design surface temperature between 54 and 66 degrees SECTION 23 70 01 00 10 Page 25 C 130 and 150 degrees F an economic evaluation must be performed The evaluation must determine if the additional capital costs for insulation outweigh the cost savings due to reduced boiler radiation losses kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk EO eo Boiler Roof Boiler roof shall have a casing constructed of not thinner than 3 416 mm 10 gauge black steel sheet Refractory lining shall consist of 63 5 mm 2 1 2 inches minimum of high duty refractory backup behind the roof tubes and sufficient thickness of high temperature block insulation or mineral wool blanket to limit the maximum casing temperature in the furnace area to 54 degrees C 130 I degrees F with a surface air velocity of 508 0 mm second 100 fpm and an ambient air temperature of 27 degrees C 80 degrees F when operating at full capacity Exposed portions
79. ated with boiler draft and control requirements PART 3 EXECUTION 3 3 oe 1 EXAMINATION After becoming familiar with all details of the work verify all dimensions in the field and advise the Contracting Officer of any discrepancy before performing the work wd EARTHWORK Excavation and backfilling for tanks and piping shall be as specified in Section 31 00 00 EARTHWORK except backfill for fiberglass reinforced fuel tanks shall conform to the manufacturer s installation instructions 3 EQUIPMENT ERECTION Install boiler and auxiliary equipment as indicated and in accordance with manufacturers instructions Submit detail drawings consisting of schedules performance charts brochures diagrams drawings and instructions necessary for installation of the steam generating units and associated equipment Include drawings for piping pipe anchors wiring devices trenches and related foundations and setting plans certified by the boiler manufacturer and burner manufacturer including coal and ash handling equipment Drawings shall indicate clearances required for maintenance and operation and shall also contain complete wiring and schematic diagrams equipment layout and anchorage and any other details required to demonstrate that the system has been coordinated and will properly function as a unit Include manufacturer s written instructions indicating optimum pressures at all manometer conne
80. ates 30 7 2 Hopper Feeders 8 Truck Hoppers 30 8 1 Hopper Gates 30 8 2 Hopper Feeders ae Vibrator 10 Car Heaters 30 10 1 Gas Fired Heaters 30 10 2 Electric Infrared Radiant WA OO BUN n es ves ves Recirculating Control Valve ports Heaters ECTION 23 70 01 00 10 Page 5 Expansion Loops Expansion Joints Valves ED PIPING INSTALLATION Protective Coating for Underground Steel Pipe Cleaning of Surfaces to be Coated Coating Materials pub Bituminous Pipe Coating T2 Polyethylene Pipe Coating 23 Tape Wrap Pipe Coating 4 Epoxy Coating System Bro Coating Inspection and Testing Installing Buried Piping Fiberglass Reinforced Plastic FRP Pipe ok Installation a2 Thrust Blocks 23 Curing of Field Bonded Joints 4 Metal to FRP Connections Buried Fuel Piping CATHODIC PROTECTION FIELD PAINTING CLEANING OF BOILERS AND PIPING FOR TESTING tok Boiler Cleaning 2 Boiler Water Conditioning 10 MANUFACTURERS FIELD SERVICES mae il FIELD TRAINING L2 FRAMED INSTRUCTIONS TESTS 1 Hydrostatic Tests 3 2 Efficiency and Operating Tests SaL Test of Fuel Burning Equipment 3313 4 Test of Deaerating Feedwater Heater 3 5 3 6 NO Fr wW Gq w an WWW OD W WW WW Ww w 3 3 5 5 DWWWWD DW WW WW DD DD DDDADHDUBPAAAAIAHAWNE Ww Ww WWW Oo nx7 WwW WWW Ww 36 LS x38 13 Test of Water Treatment
81. avy grating with openings approximately 50 mm 2 inches square Ashes and clinkers shall be discharged from the boiler ash hoppers into ash pits located directly below the ash hopper doors A combination drag chain conveyor for horizontal conveying and an elevator conveyor for vertical conveying of ashes shall be arranged as indicated to take ashes from the bottom of the ash pits for discharge into the ash silo Conveyors shall have a capacity of not less than metric tons hour tons hour when handling ashes weighing approximately kg cubic meter pcf at a maximum speed of 508 mm sec 100 fpm Doors shall be provided for access to all parts as required Motor shall be totally enclosed nonventilated type totally enclosed fan cooled type totally enclosed fan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the lin reduced voltage start type with general purpos weather resistant water tight dust tight explosion proof enclosure Jie Salts eO l Drag Chain Conveyor Drag chain conveyor shall be of a single strand of wide heat treated high alloy drop forged rivetless drag chain with a mm inch pitch mm inch overall width and kg pounds working strength and shall have a hardness of 460 510 Brinell The upper strand of the chain shall convey the ash i
82. based on the following Boilers having output capacities of 3 5 Megawatts 12 000 000 Btuh or more will be equipped with mechanically driven grates operating continuously or intermittently Dump grates will not be permitted in boilers in this size range Spreader stokers will be specified for watertube boilers using bituminous coal with ash content on a dry basis in excess of 8 percent or ash fusion temperature lower than 1204 degrees C 2200 degrees F Underfeed or pulsating grate stokers may be wn ECTION 23 70 01 00 10 Page 30 specified for firebox packaged boilers when bituminous coal of any composition is used Underfeed stokers will be the screw feed type for boilers with capacity of less than 1635 kg 3600 pounds of steam per hour and the ram type for larger boilers Pulsating grate units will be water cooled and complete with automatic coal feed and continuous ash removal Conveyor stokers may be specified for watertube boilers if suitable for the type of coal available Chain or traveling grate may be specified by deletion of the inapplicable type of grate or the choice between the two types may be left to the Contractor by including both types in the description If steam drives are specified plant must have an auxiliary boiler or an alternate source of steam for startup The following is a general guide in determining which type of grates to investigate Size Steam rate of Type of Grate and Stoker boil
83. be in modular lengths suitable for both 45 and 90 metric tons 50 and 100 tons capacity cars and shall be designed for manual automatic disconnection of units not required during thawing operations Car heaters shall include sidecar or undercar heating banks or both capable of operating as independent units designed for maintaining a balanced thr phase distribution system Heaters shall have heating conductor units including factory assembled connections for attachment to water tight terminal boxes supported on corrosion resistant metal framing and shall have rust resistant steel reflectors with an approved coating Heaters and connections shall be wired using NEMA 4 enclosures in accordance with NEMA ICS 1 suitable for cleaning by hosing down with water 30 11 Coal Spouts Chutes Inlet Boxes and Outlet Hoppers Coal spouts chutes inlet boxes and outlet hoppers shall be constructed SECTION 23 70 01 00 10 Page 88 of ASTM A36 A36M steel members not lighter than 3 416 mm 10 gauge adequately reinforced and braced with angle frames and with all joints dust tight Slopes shall be as steep as possible but not less than 55 degrees off horizontal iners shall be stainless steel or ultra high molecular weight polyethylene UHMWP If UHMWP liners are used each side of chute at each floor level shall be provided with a warning sign DANGER DO NOT WELD FLAMMABLE PLASTIC LINER Impact liners shall also be used Access openi
84. boiler manufacturer and shall include finned tubes bare tubes baffles and headers and shall have provision for cleaning and tube bundle removal At maximum load economizer exit water shall not be within 17 degrees C 30 degrees F lower than saturation temperature Materials shall be capable of withstanding the maximum boiler exit gas temperature plus 28 degrees C 50 degrees F The tubes shall conform to ASME BPVC SEC I The overall design and installation shall preclude cold end corrosion under any load condition Economizer tube metal temperature shall be above the maximum flue gas dewpoint for the fuel being fired under all load conditions 2 10 2 Air Preheaters Air preheaters shall be a type normally provided by the boiler manufacturer and shall be the recuperative tube plate or regenerative type constructed of materials adequate to withstand the corrosion effects of the flue gases The overall installation shall preclude cold end corrosion of the air preheater under any load condition Temperatures of metals in contact with flue gas shall be above the flue gas maximum dewpoint temperature for the fuel being fired under all load conditions Control shall be by steam preheat or by automatic bypass and shall be integrated with the combustion control system SECTION 23 70 01 00 10 Page 59 2340 DRAFT FANS kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
85. bulence to preclude stratification The burner design shall permit the firing of No 2 fuel oil In duct over bed burners shall be of the air atomizing type The burners and or ignitors shall have an aggregate capacity capable of bringing a cold unit up to ignition temperature using either precalcined limestone or spent bed material in 4 hours for AFBs and 8 to 12 hours for CFBs depending upon refractory limitations Equipment for remote positioning shall be furnished if required of each burner gun at either the fully retracted or fully inserted position The positioning equipment shall be air operated shall include limit switches to indicate the position of the gun and all necessary drives linkages and mechanisms and shall automatically purge the fuel from the guns before retracting 6 9 Air Distribution System The air distribution system shall provide uniform air distribution to the fluid bed under any mode of operation The system must also meet the mechanical and structural requirements of the boiler such as bed material dead load support effective seal with the enclosure wall and nonsifting air nozzles 6 10 Mechanical Collector and Solids Recycle System for AFB Boilers A mechanical cyclone dust collector at the outlet of the boiler shall be SECTION 23 70 01 00 10 Page 45 provided The mechanical dust collector shall be of the high efficiency multicyclone type designed for maximum ope
86. cess Belts pulleys chains gears couplings projecting setscrews keys and other rotating parts exposed to personnel contact shall be fully enclosed or guarded High temperatur quipment and piping exposed to contact by personnel or where it creates a fire hazard shall be properly guarded or covered with insulation of a type specified Items such as catwalks operating platforms ladders and guardrails shall be provided where shown and shall be constructed in accordance with Section 05 50 13 MISCELLANEOUS METAL FABRICATIONS 05 51 33 METAL LADDERS a2 BOILERS kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE Specify steam outlet temperature in cases where the boiler includes a superheater kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk Each boiler shall have the capacity indicated Th quipment design and accessory installations shall permit accessibility for maintenance and service Boilers shall be designed for a maximum allowable working pressure of Pa psig with an operating pressure of Pa psig SECTION 23 70 01 00 10 Page 18 Design conditions shall be as follows Rated capacity kg hour pounds hour Steam outlet temperature degrees C degrees F Site elevation m feet Ambient air temperatures t i degrees C degrees F Reference air temperature 27 degrees C 80 degrees F The boiler
87. cification for High Strength Low Alloy Structural Steel 2014a Standard Specification for Welded Austenitic Steel Boiler Superheater Heat Exchanger and Condenser Tubes 2012 Standard Specification for Pressure Vessel Plates Carbon Steel Low and Intermediate Tensile Strength 2015 Standard Specification for Carbon SECTION 23 70 01 00 10 Page 11 Codes for Army projects using the Resident Management System RMS are AE for Architect Engineer DO for District Office Engineering Division or other organization in the District Office AO for Area Office RO for Resident Office and PO for Project Office Codes following the G typically are not used for Navy Air Force and NASA projects An S following a submittal item indicates that the submittal is required for the Sustainability Notebook to fulfill federally mandated sustainable requirements in accordance with Section 01 33 29 SUSTAINABILITY REPORTING Choose the first bracketed item for Navy Air Force and NASA projects or choose the second bracketed item for Army projects kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Government approval is required for submittals with a G designation submittals not having a G designation are for Contractor Quality Control approval information only When used a designation following the G designation identifies the office that will review the submittal for the Gover
88. ctors n ECTION 23 70 01 00 10 Page 100 3 3 4 STORAGE TANK INSTALLATION Install storage tank in accordance with Section 33 56 10 FACTORY FABRICAT FUEL STORAGE TANKS ea w iD PIPING INSTALLATION Pipe shall be cut accurately to measurements established at the jobsite shall be installed without cold springing and shall properly clear windows doors and other openings Cutting or other weakening of the building structure to facilitate piping installation will not be permitted Pipes shall be free of burrs oil grease and other foreign matter Pipes shall be installed to permit free expansion and contraction without damaging building structure pipe joints or hangers Changes in direction shall be made with fittings except that bending of pipe 100 mm 4 inches and smaller will be permitted provided a pipe bender is used and wide sweep bends are formed The centerline radius of bends shall not be less than 6 diameters of the pipe Bent pipe showing kinks wrinkles flattening or other malformations will not be accepted Carbon steel piping to be bent shall conform to ASTM A53 A53M Grade A standard or Grade B extra heavy weight Vent pipes shall be carried through the roof as directed and shall be properly flashed Unless otherwise indicated horizontal supply mains shall pitch down in the direction of flow with a grade of not less than 25 mm in 12 m 1 inch in 40 feet Open ends of pipelines an
89. d equipment shall be properly capped or plugged during installation to keep dirt or other foreign materials out of the systems Pipe not otherwise specified shall be uncoated Unless otherwise specified or shown connections to equipment shall be made with malleable iron unions for steel pipe 65 mm 2 1 2 inches or less in diameter and with flanges for pipe 80 mm 3 inches or more in diameter Unions for copper pipe or tubing shall be brass or bronze Connections between ferrous piping and copper piping shall be electrically isolated from each other with dielectric couplings or other approved methods Reducing fittings shall be used for changes in pipe sizes In horizontal steam lines reducing fittings shall be the eccentric type to maintain the top of the lines at the same level oven Pipe Sleeves Pipe passing through concrete or masonry walls or concrete floors or roofs shall be provided with pipe sleeves fitted into place at the time of construction A waterproofing clamping flange shall be installed as indicated Sleeves shall not be installed in structural members except where indicated or approved All rectangular and square openings shall be a fe s detailed Each sleeve shall extend through its specified wall floor r roof and shall be cut flush with each surface except that sleeves through floors and roofs shall extend above the top surfac
90. d of corrosion resistant material with hardened steel encased rubber bushings at articulation points The base shall be fabricated of steel channels or concrete foundations angles bolted directly to building support drive shall be through an eccentric shaft supported by a double row of The blocks Positive action motion self aligning ball or roller bearing pillow shall be imparted to the trough by a cast steel the trough by rubber bushed wristpin and securely locked by taper lock bushings The conveyor shall be driven by a nonventilated type totally enclosed fan cooled type suit installation in Class II Division 1 Group F hazardous location in SECTION 23 70 01 00 10 Page 85 totally enclosed able for connecting rod attached to accordance with NFPA 70 electric motor connected to the eccentric shaft by V belt drive The motor starter shall be manual magnetic across the line reduced voltage start type with general purpose weather resistant water tight dust tight explosion proof enclosure 2 30 6 Gravimetric Weigh Feeder The weigh feeder shall be a metering belt type device designed to operate at a variable rate ranging from 10 percent of maximum capacity to metric tons hour tons hour Flow rate shall be automatic A silicon controlled rectifier dc drive shall automatically adjust the belt speed to maintain the rate of material flow as set on the co
91. d valve Units shall be designed for the characteristics of the coal specified and shall be capable of handling bottom ash at a rate exceeding the conveying system capacity e o DORES Conveyor Piping Conveyor pipe and fittings shall be made of an abrasive resisting alloy metal cast by the sand spun process having a minimum Brinell hardness of 280 Wall thickness shall not be less than 13 mm 1 2 inch and pipe lengths shall not exceed 5 5 m 18 feet Joints shall be made with flanges or sleeve pipe couplings and shall be airtight Fittings shall have a Brinell hardness number of approximately 400 and shall be provided with removable wearbacks where applicable or shall be of the integral wearback type Ash inlet fittings shall be designed so that the ash cannot overload or clog the conveyor pipeline Suitable adjustable supports or hangers shall be provided Vacuum hose connections shall be provided as indicated Provide 4 6 meters 15 foot lengths of vacuum hose with quick connectors and four floor sweep up nozzles 31 1 4 Vacuum and Combination Vacuum Pressure Systems sade Deh l Vacuum System The ash conveying equipment shall be pneumatic suction type complete with vacuum pumps and all component parts necessary for complete and successful operation The ash conveying equipment shall be sized approximately twice the predicted accumulation rate The system shall have the capacity to convey and empty not less than
92. dwater heater shall have a capacity of pounds of water per hour at a discharge temperature of degrees F at the following inlet conditions Pressure kPa psig Temperature range Flow rate kg hr deg C deg F lb hr Condensate return High pressure trap returns Makeup water Heating steam 20 STEAM TRAPS kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The design engineer when designating steam using equipment or special steam applications will indicate the type of steam trap required in accordance with the following data a Inverted Bucket Traps This type of trap continuously vents air and carbon dioxide at steam temperature and is recommended for modulating loads The bucket floats on steam to close the outlet and sinks into condensate to open the condensate outlet Any trapped air is discharged first into the condensate return line and is followed by condensate discharge This type of trap has the longest life on systems under modulated control When large amounts of air are anticipated an external thermostatic air vent should be wn ECTION 23 70 01 00 10 Page 66 installed on a line bypassing the trap to bleed air from the steam line and discharge it to the condensate return line This system will give optimum performance at low steam pressures with maximum dependability These traps will handle condensate from fan coil
93. e 1326 2 Conductivity Tests for Boilers without Superheaters kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Delete the inapplicable paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Steam tests for boilers without superheaters not used for power generation or large turbine drive shall be made on steam sampled in accordance with ASTM D1066 using the conductivity method in ASTM D2186 The conductivity of the steam corrected for carbon dioxide and ammonia content shall not exceed 30 microhms at 18 degrees C65 degrees F J3 13 6 2 Conductivity Test Boilers with or without Superheaters The steam for boilers with or without superheat used for power generation or turbine drive for air conditioning equipment shall be sampled in accordance with ASTM D1066 and shall be tested in accordance with the conductivity method in ASTM D2186 with the conductivity of the steam corrected for carbon dioxide and ammonia content not to exceed 4 0 microhms at 18 degrees C65 degrees F 3 013 62 3 Water Level Stability Test Water level stability test first shall be conducted by use of the manual bypass around the feedwater regulator Test then shall be repeated using the automatic feedwater regulator Boiler shall maintain specified water level stability under both conditions End of Section n ECTION 23 70 01 00 10 Page 116 th xtended screw shall have
94. e associated structural member and shall be large enough to provide a minimum clear distance of 13 mm 1 2 inch between the pipe and sleeve except where otherwise indicated Sleeves through concrete may be 0 912 mm 20 gauge metal fiber or other approved material Sleeves shall be accurately located on center with the piping and shall be securely fastened in place The space between the sleeves and the pipe shall be caulked and filled with bituminous plastic cement or mechanical caulking units designed for such use n ECTION 23 70 01 00 10 Page 108 3 6 5 Fiberglass Reinforced Plastic FRP Pipe Field assembly of the pipe shall be done in conformance with the manufacturer s written instructions and installation procedures Several pipe joints having interference fit type couplings may be field bonded and cured simultaneously However the pipe shall not be moved nor shall additional joints be made until the previously laid joints are completely cured Joints not having interference fit type couplings shall be fitted with a clamp which shall hold the joint rigidly in place until the joint cement has completely cured The clamps shall have a protective material on the inner surface to prevent damage to the plastic pipe when the clamp is tightened in place The pipe shall be provided with a device or method to determine when the join
95. e at least 150 mm 6 inches for proper flashing or finishing Membrane clamping rings shall be provided where membranes are penetrated Unless otherwise indicated sleeves shall be sized to provide a minimum clearance of 6 mm 1 4 inch between bare pipe and sleeves or between jacket over insulation and sleeves Sleeves in bearing walls waterproofing membrane floors and wet areas shall be galvanized steel pipe Sleeves in nonbearing walls floors or ceilings may be galvanized steel pipe or galvanized sheet metal with lock type longitudinal seam Except in pipe chases or interior walls the annular space between pipe and sleeve or between jacket over insulation and sleeve in nonfire rated walls and floors shall be sealed as indicated and specified in Section 07 92 00 JOINT SEALANTS and in fire rated walls and floors shall be sealed as indicated and specified in Section 07 84 00 FIRESTOPPING Metal jackets for insulated pipes passing through exterior n ECTION 23 70 01 00 10 Page 101 walls firewalls fire partitions floors and roofs shall not be thinner than 0 15 mm 0 006 inch thick aluminum if corrugated and 0 41 mm 0 016 inch thick aluminum if smooth and shall be secured with aluminum or stainless steel bands not less than 9 5 mm 3 8 inch wide and not more than 200 mm 8 inches apart Where penetrating roofs before fitting the metal jacket into place a 13 mm 1 2 inch
96. e drop through the air distributor plate shall be 3 7 kPa 15 inches water gauge minimum The walls of the fluid bed combustor shall be constructed of water cooled tubes which form a part of the steam water circuit of the boiler These walls shall be of membrane wall type of construction The distributor shall be designated to assist with removal of large tramp material where expected ROPA Bed Material Letdown System The bed material letdown system shall be capable of removing and cooling solids from the bed including spent sorbent unfired fuel bottom ash rocks and debris The system shall be designed to operate continuously and to cool all the solids going to disposal to 135 degrees C 275 degrees F or less The system shall be sized to continuously remove at least 80 percent of the total solids generated from the boiler unless otherwise approved The design of the bed letdown system shall include personnel safety considerations such as prevention of spillage of hot bed material from the unit 6 8 Burners and Fuel Piping The burners and burner equipment shall be suitable for continuous service Parts subject to severe wear or deterioration shall be replaceable with a minimum of dismantling All valves or controls shall be mounted outside the boiler front and air housing The burner design shall provide positive and uniform mixing of the air and fuel at all loads and shall produce sufficient tur
97. e failure Boiler drains shall be furnished sufficient in size and number to completely drain the water from the entire unit in not more than 1 hour at kPa psig pressure separation 6 3 Forced Circulation System Boiler designs utilizing horizo provided with a forced circulation system pumps installed shall be such t maximum rating of the boiler ca addition loss of all pumps wi and orderly shutdown pumps shall be single stage ce Pumps shall be complete with all suction and discharge connections without fans hat with one pump out of service n be carried with complete safety th the unit at MCR without damage to the boiler ntrifugal necessary accessories Lubrication system The drum shall be equipped with internals for steam ntal in bed evaporating surfaces shall be The number and capacity of the the In shall allow for a safe The driven by constant speed motors including welded casing drain valves in duplicate and any necessary equipment The pumps shall wit operating pressures and tempera effects The casings shall withs them by the connecting piping wit successful operation of the pumpi as to permit inspection of the ro suction and discharge piping ns all loads either by themselves or in parallel furnished The pump suc valves shall be furnished around the pump isol operating temperature in the idle pumps and piping shall hav
98. e high solids circulation locity not greater than 4 6 m second 15 fps is permitted tubes based on 25 percent excess air The design of the equipment shall be such that the interior surfaces of all water filled pressure parts and superheater sections shall be capable of being chemically cleaned Furnish as required fill and drain connections Each header shall be drainable Provide the secondary air and flue gas system resistance curves 2 Ore Z Furnace and Boiler The boiler shall be of the water tube welded wall type having in bed tube surface for AFB offerings with natural and or forced circulation Tubes shall be seamless and all connections shall be welded Tubes of the electric resistance welding process where used shall be identified by the Contractor and shall be ultrasonically tested along their entire length by the Contractor Provide permanent thermocouples as required run to a terminal box outside the boiler casing As a minimum these thermocouples shall indicate SECTION 23 70 01 00 10 Page 42 risers etc a Water wall temperature in critical locations b Heat absorption rates cordial type t c c Air and gas temperatures d Water and steam temperatures Drums shall be fusion welded throughout and fitted with manholes and hinged covers at both ends monitored The hydrostatic test temperatur as indicated in paragraph TESTS to avoid britt shall be carefully
99. e impactor handwheels and with protecting strainers as required circulation to all parts of the boil auxiliary pumps tand the boiler heat exchangers or other tures without distortion tand the ng units tion valves shall be motor operated hout disturbing tating parts wit The pumps shall lugs for air motor drive shall be provided to assure adequate ler circuits st pressure and all binding or other forces and moments imposed upon the alignment or The construction shall be such hout dismantling the operate satisfactorily at with the other pumps Bypasses with ng valves to maintain The discharge valves Orifices ati All materials that may come in contact therewith shall be suitable to withstand acid and caustic boiler cleaning solutions Connecting lines with stop valves shall be provided between the main distributing header and the economizer inlet header for use as a circulating line to the economizer when the boiler is acid cleaned 6 4 In Bed Tube Surface AFB Designs In bed tube surface shall be provided as required to achieve steam generation or superheat temperature as defined in the data sheets The in bed tubes shall be completely clear of bed material when the fluid bed at the bed weight specified by slumped Alternatively the ma protected from overheating due the manufacturer at boiler MCR nufacturer shall ensure that t
100. e or Type 40 shield is permitted for a particular pipe attachment application the Type 39 saddle shall be used on all pipe 100 mm 4 inches and larger h Horizontal pipe supports shall be spaced as specified in MSS SP 69 and a support shall be installed not over 300 mm 1 foot from the pipe fitting joint at each change in direction of the piping Pipe supports shall be spaced not over 1 5 m 5 feet apart at valves In the support of multiple pipe runs on a common base member a clip or clamp shall be used where each pipe crosses the base support member Spacing of the base support members shall not exceed the hanger and support spacing required for any of the individual pipes in the multiple pipe run The clips or clamps shall be rigidly connected to the common base member A clearance of 3 mm 1 8 inch shall be provided between the pipe and clip or clamp for all piping which may be subjected to thermal expansion i Vertical pipe shall be supported at each floor except at slab on grade and at intervals of not more than 4 5 m 15 feet not more than 2 4 m 8 feet from end of risers and at vent terminations j Type 35 guides using steel reinforced polytetrafluoroethylene PTFE or graphite slides shall be provided where required to allow longitudinal pipe movement Lateral restraints shall be provided as required Slide materials shall be suitable for the system operating temperatures atmospheric conditions and beari
101. e the protective covering applied by hand preferably at the plant applying the covering to the pipe not be field applied until the piping has satisfactorily passed the leak or hydrostatic test All field joints shall be coated and wrapped by hand All hand coating and wrapping shall be done in a manner and with materials that will produce a covering equal in effectiveness to that of the mechanically applied covering 6 2 Cleaning of Surfaces to be Coated Coatings shall Steel surfaces shall be solvent washed to assure an oil and grease fr surface and blast cleaned to bare metal as specified in SSPC SP 6 NACE No 3 Areas that cannot be cleaned by blasting shall be cleaned to bare metal by powered wire brushing or other mechanical means The air supply for blasting shall be free from oil and moisture Following cleaning the surfaces shall be wiped with coal tar solvent naphtha and al llowed to dry The surfaces to be coated shall be free of all mill scale and foreign matter such as rust dirt grease oil and other deleterious substances r the cl Surfaces shall be coated as soon as practicable aft operation 6 3 Coating Materials aning Buried steel piping shall be coated with one of the following methods VOe Bituminous Pipe Coating kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE If coating system similar to coal tar coating and wrapp
102. e with stainless steel case and stem separable stem separable thermowells and temperature range suitable for the use encountered Thermometers shall be installed in the feedwater heater storage and steam areas boiler feed pump in the main condensate return line befor ntering the surge tank in the combustion air inlets and outlets of air preheaters water inlets and outlets of economizers in the suction and discharge of boiler feed pumps in air inlets to forced and induced draft fans in the flue gas inlets and outlets of economizers and air preheaters and elsewhere as indicated or specified Thermometers shall have a universal joint and shall be easily read from the operating floor Thermometers shall have 127 0 mm 5 inch scales except where 304 8 mm 12 inch scales are required for remote reading and plus or minus 1 percent accuracy 2223 WATER METER kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE For boilers having less than 4 540 kg 10 000 lbs per hour steaming capacity a mechanical type feedwater meter may be provided in accordance with this paragraph Plants having metered zeolite softeners used exclusively for boiler makeup purposes will not require an additional cold water makeup water meter Boilers over 4 540 kg 10 000 lbs per hour capacity will have indicating recording meters and they shall be integrating type where indicated kkkkkkkkkkkkkkkkkkkkk
103. eciable manual adjustment The system shall be capable of maintaining the specified pressure provided that the load does not exceed a 15 percent per minute change in capacity at any one time The master transmitter shall be connected to the main steam header where the steam pressure is to be controlled The signal transmitted from this point to the master controller shall be a function of steam pressure On multiple boiler installations a means shall be provided to base load on individual boilers SECTION 23 70 01 00 10 Page 47 while on automatic and each boiler unit shall be individually controlled Provision shall be made on the control system for adding on other boilers to the system with only minor wiring or piping changes on the panel The fuel to air ratio on this system shall be adjustable from one knob that indicates increase and decrease of air in proportion to fuel The range of this adjustment shall be limited to prevent operation below safe combustion limits 8 2 Metering Type Combustion Control Equipment kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This paragraph will be deleted if controls with oxygen compensation specified in paragraph COMBUSTION CONTROLS WITH OXYGEN TRIM are used KKK de He de He e He e He e He e He e He e He e He e He e He e He e He e He KK He He e He e He KKK He ke He ke He He He ke He ke e ke ke ke ke ke ke ke ke ke ke ke k k k kkk k k
104. ed at sling points with roofing felt or other approved heavy shielding material or shall be handled with canvas slings Damaged wrapping shall be repaired as specified Pipe in straight runs shall be wrapped spirally half lapping the tape as it is applied For pipe smaller than 100 mm 4 inches one layer half lapped shall be used For pipe 100 mm 4 inches and larger two layers half lapped shall be used with the second layer wrapped opposite hand to the first Joints coupling fittings and Similar units and damaged areas of wrapping shall be wrapped spirally beginning with one complete wrap 75 mm 3 inches back from each edge of the corresponding size of straight pipe On irregular surfaces such as valves and other accessories one layer half lapped and stretched sufficiently to conform to the surface shall be applied followed by a second layer half lapped and applied with tension as it comes off the roll h H 6 3 4 Epoxy Coating System The epoxy coating system shall conform to AWWA C213 Type II Fittings valves and joints shall be factory coated with materials identical to n ECTION 23 70 01 00 10 Page 107 those used on the pipe or may be field coated with a two part epoxy system recommended by the manufacturer of the pipe coating system Field protection may also be provided for joints and fittings with a coal tar tape hot applied over a compatible primer 673 25 Coa
105. eedwater heater storage and steam areas boiler feed pump in the main condensate return line befor ntering the surge tank in the combustion air inlets and outlets of air preheaters water inlets and outlets of economizers in the suction and discharge of boiler feed pumps in air inlets to forced and induced draft fans in the flue gas inlets and outlets of economizers and air preheaters and elsewhere as indicated or specified Thermometers shall have a universal joint and shall be easily read from the operating floor Thermometers shall have 127 0 mm 5 inch scales except where 304 8 mm 12 inch scales are required for remote reading and plus or minus 1 percent accuracy 2223 WATER METER kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE For boilers having less than 4 540 kg 10 000 lbs per hour steaming capacity a mechanical type feedwater meter may be provided in accordance with this paragraph Plants having metered zeolite softeners used exclusively for boiler makeup purposes will not require an additional cold water makeup water meter Boilers over 4 540 kg 10 000 lbs per hour capacity will have indicating recording meters and they shall be integrating type where indicated kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk SECTION 23 70 01 00 10 Page 69 Water meter including the thr valve bypass and connections shall be provided
106. ees and shall be stiffened with 6 4 mm 1 4 inch angles minimum The hopper may also be of ASTM A36 A36M mild steel minimum 6 4 mm 1 4 inch thick with replaceabl liners 6 4 mm 1 4 inch thick ASTM A167 Type 304L stainless steel Rivets and field bolts inside the hopper shall be flat head type The hopper shall be supported by a flange fastened to the concrete ledge continuously around the hopper with the concrete forming the top portion of hopper sides Top of hopper shall be fitted with properly sized section of bar grating made with by mm inch mild steel bars and mm inch diameter cross rods to form openings mm inches square A supporting beam not less than mm inches deep kg meter pounds foot in a wide flange member shall be provided under the grating ESLOS x Hopper Gates A rack and pinion gate shall be provided at each hopper outlet and shall be a self cleaning type Hand Motor operated sliding plate shall be 9 5 mm 3 8 inch thick carbon steel formed into the shape of a winged U The gate plate surface shall be completely protected by an overlapping liner of 3 2 mm 1 8 inch thick ASTM A167 Type 304 stainless steel The gate body material except for the dust cover shall be of 4 5 mm 3 16 inch thick ASTM A167 Type 304L stainless steel where in contact with coal flow 3008 42 Hopper Feeders The vibrating or belt feeders complete with control of manufacturer s standard design for the service
107. elements for steam flow fuel feed and air flow Separate steam pressure fuel flow and air flow controllers shall be panel mounted along with a fuel to air ratio controller The actual steam flow shall be measured by an orifice or other flow measuring device in the steam line The air flow shall be set by a measuring element in the combustion air stream Systems controlling fuel and air by line shafting and mechanical connections will not be acceptable Orci due Master Pressure Transmitter A master pressure transmitter shall be provided and connected to the main steam header at a point where the steam pressure is to be controlled The master controller which is located on the panel shall load the various individual boiler controllers according to steam pressure changes On multiple boiler installations an operator station shall be provided to base load or bias each individual boiler while keeping its fuel and air SECTION 23 70 01 00 10 Page 48 2 20 4 Float and Thermostatic Traps Float and thermostatic traps shall be designed for a steam working pressure of 103 kPa 15 psig but shall operate with the supply pressure indicated for the system The trap capacity shall be based on a pressure differential of 15 kPa 2 psi The inlet to each trap shall be provided with a brass or stainless steel strainer either separately or as an integral part of the trap 2324 PRESSURE GAUGES
108. enance Silo shall be provided with steel ladder and safety cage from the ground level to roof steel ladder inside storage bin and an angle railing around the roof perimeter Minimum plate thickness shall be 6 4 mm 1 4 inch Silo shall be complete with all accessories required for an operable installation including but not limited to high ash level detector roof manhole pressure and relief valve and other roof openings as necessary Interior coating shall be coal tar epoxy conforming to SSPC Paint 16 a Ash storage silo for vacuum system shall be provided with two stage separators and a tertiary bag filter The primary receiver shall be cylindrical and shall be constructed entirely of sectional steel or cast plates suitable for this special service The receiver shall be not less than 900 mm 3 feet in diameter Flanges and bolts shall be on the outside and the impact of ash shall be directed against heavy iron wear plates of abrasive resistant alloy The receiver shall be provided with an air tight discharge passage not less than 450 mm 18 inches in diameter for free flow of clinkers The receiver shall have means for positive periodic and automatic operation in dumping its entire contents into the silo in addition the system shall be so designed that all suction is positively shut off from the receiver during its dumping period so that no dust can be sucked out through the
109. endent testing laboratory of each instrument meter gauge and thermometer to be used in the tests The test shall not commence until the procedure has been approved Submit complete plan for water treatment including proposed chemicals to be used and nationally recognized testing codes applicable to the system prior to system startup Piping shall be welded in accordance with qualified procedures using performance qualified welders and welding operators Procedures and welders shall be qualified in accordance with ASME BPVC SEC IX Welding procedures qualified by others and welders and welding operators qualified by another employer may be accepted as permitted by ASME B31 1 The Contracting Officer shall be notified 24 hours in advance of tests and the tests shall be performed at the work site if practicable The welder or welding operator shall apply his assigned symbol near each weld he makes as a permanent record Structural members shall be welded in accordance with Section 05 05 23 16 STRUCTURAL WELDING Welding and nondestructive testing procedures are specified in Section 40 05 13 96 WELDING PRESSURE PIPING 34 2 Use of Asbestos Products kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE The first clause in brackets should be used when it is known that substitutes are available for any asbestos products which might be included with the equipment The
110. ent Equipment Ls Test for Steam Purity and Water Level Stability Bio 13651 Conductivity Tests for Boilers without Superheaters 8 13 6 2 Conductivity Test Boilers with or without Superheaters Bi 13 683 Water Level Stability Test End of Section Table of Contents n ECTION 23 70 01 00 10 Page 7 FOI I III Fe He e e e IO III III IO IO He e e IO III IOI IO ITO I ke ke ke kekk k k USACE NAVFAC AFCEC NASA UFGS 23 70 01 00 10 January 2008 Preparing Activity USACE Superseding UFGS 23 70 01 00 10 October 2007 UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated October 2015 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SECTION 23 70 01 00 10 CENTRAL STEAM GENERATING SYSTEM COAL FIRED 01 08 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This guide specification covers the requirements for coal fired central steam generating systems Adhere to UFC 1 300 02 Unified Facilities Guide Specifications UFGS Format Standard when editing this guide specification or preparing new project specification sections Edit this guide specification for project specific requirements by adding deleting or revising text For bracketed items choose applicable items s or insert appropriate information Remove information and requirements not required in respective project whether or not brackets
111. ent equipment shall meet the requirements specified as to capacity and quality of effluent Tests for ion exchange units shall cover at least two complete regenerations and capacity runs 3 13 6 Test for Steam Purity and Water Level Stability Test for steam purity in accordance with ASTM D1066 and water level Stability shall be simultaneous under the operating conditions specified Se 1326 2 Conductivity Tests for Boilers without Superheaters kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Delete the inapplicable paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Steam tests for boilers without superheaters not used for power generation or large turbine drive shall be made on steam sampled in accordance with ASTM D1066 using the conductivity method in ASTM D2186 The conductivity of the steam corrected for carbon dioxide and ammonia content shall not exceed 30 microhms at 18 degrees C65 degrees F J3 13 6 2 Conductivity Test Boilers with or without Superheaters The steam for boilers with or without superheat used for power generation or turbine drive for air conditioning equipment shall be sampled in accordance with ASTM D1066 and shall be tested in accordance with the conductivity method in ASTM D2186 with the conductivity of the steam corrected for carbon dioxide and ammonia content not to exceed 4 0 microhms at 18 degrees C65 degrees F 3 013
112. entation that the CEMS equipment has passed factory and field certification tests required by federal state and local regulations The investigation will determine if the reported values may be calculated or should be direct measurements Fill in the data to state what method of measurement or calculation will be utilized for the determination of the report variable Emerging flue gas flow monitor technologies are available The traditional differential pressure technique specified uses familiar equipment that can be maintained by plant personnel This type of measurement device has reliably satisfied regulatory requirements The possible use of other technologies should include a thorough investigation of flue gas flow monitor regulatory requirements and in house maintenance capabilities kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk a a Continuous emissions monitoring system CEMS equipment shal wn ECTION 23 70 01 00 10 Page 58 l be provided as a system by a single manufacturer A CEMS meeting the requirements of applicable federal regulations State of and local regulations shall be provided for each boiler in accordance with manufacturer s recommendations and under the direct supervision of the CEMS equipment manufacturer b The reported data shall include sulfur dioxide S02 oxides of nitrogen NOx carbon dioxide CO2 particulate matter PM and other information re
113. er kg hr lb hr 1 135 9 070 2 500 Single retort stationary grate 20 000 underfeed stoker 9 070 13 600 20 000 Single retort moving grate 30 000 underfeed stoker 2 270 34 020 5 000 Reciprocating grate front 75 000 continuous ash discharge stoker 2 270 45 360 5 000 Vibrating conveyor grate front 100 000 continuous ash discharge stoker kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Spreader stokers shall be the overfeed self feeding type suitable for burning a portion of the coal in suspension but sized assuming 100 percent combustion on the grate Coal shall be evenly distributed across the full width of the grate by not less than feeder units Unit shall be designed for operation of any feeder independently of the others or it shall be possible to operate all feeders simultaneously Feeders shall be capable of handling and uniformly distributing coal over the grate area Feeders shall be the mechanical rotating type shall have no moving parts within the combustion chamber and where moving parts are exposed to excessive heat such parts shall have all bearings protected by suitable water jackets Grease or oil lubrication shall be provided for all bearings Stoker shall be designed for readily adjustable feed distribution of coal on the grates 4 1 1 Spreader Stoker Grates kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NO
114. eration in a fixed location scraper and crossover handrail The traversing speed shall not exceed 127 mm sec 25 fpm tor shall include a motor brake The chute shall be one way center of the silo and shall slope at not less than 55 degrees hall be provided with all necessary components for installation e bunker silo slot Seal shall be of the plow type The tripper rovided with W hp motor all reversing and end travel ches cable reel and 14 No 12 AWG conductor cable 13 slip supports for the starter Two pushbutton stations shall be ne on each side of the tripper Both stations shall include forward reverse and tripper stop run pushbuttons The conveyor frame shall include a Reversing dogs to pe switches s extreme li furnished switches s Class II complete t carrying a ladder type cable tray to contain the cable from the reel switches shall be mounted on the tripper and be actuated by track rmit reversal of the tripper over each extreme silo Limit hall be mounted on the tripper to operate immediately beyond both mits of tripper reversal A plugged chute switch shall also be All tripper controls including limit switches and reversing hall be furnished in explosion proof enclosures approved for Division 1 Group F service in accordance with NFPA 70 The ripper shall also include pulley assemblies shafts bearings nd return idlers tripper framing and supports
115. erence shall not exceed the following values in each octave band at the midfrequency cycles per second SECTION 23 70 01 00 10 Page 72 Octave Bands 3 4 5 6 z Midfrequency in Hz 250 500 1000 2000 4000 Sound Power Level Office Space 54 50 47 45 43 Conference Rooms Communication Facilities 51 46 45 42 38 Shops Factories 69 62 61 58 57 The sound power level data for these units shall be based on tests conducted in accordance with ASA S1 13 25 S152 Propeller Type Unit Heater Heater shall be designed for suspension and arranged for horizontal or vertical discharge of air as indicated The casings shall be not lighter than 0 912 mm 20 gauge steel Suitable stationary or rotating air deflectors shall be provided to assure proper air and heat penetration at floor level Suspension from heating pipes will not be permitted Vertical discharge heaters shall operate at speeds not in excess of 1200 rpm except that units with 53 Megajoules 50 000 Btu output capacity or less may operate at speeds up to 1 800 rpm Horizontal discharge unit heaters shall have discharge or face velocities not greater than the following Unit Capacity Face Velocity Up to 0 472 cu m second 1 000 cuf minute 4 0 m per second800 feet per minute 0 472 to 1 4 cu m second1 001 to 3 000 4 6 m per second900 feet per minute cu f minute 1 4 and over cu m second3 001 a
116. es rotating in an elliptical casing Water alternately entering and leaving the chambers within the rotor vanes shall provide the required pumping action Water within the casing shall act as an air cleansing agent and the operation and maintenance of the unit shall not be affected by dust laden air Unit shall be base mounted with electric motor drive and all required heat exchangers separators and control valves The vacuum pump inlet piping shall be provided with a vacuum filter unit to remove the fly ash obtained from the economizer ash hopper The filter unit shall include a metal housing containing filter bags and an automatic air purge back washing system A water spray shall be incorporated into the filtering unit The filtering unit shall remove all fly ash before discharge to the atmosphere 2a Bld Control Cabinet Control cabinet for the complete operation of the system shall be supplied and shall include all running indicating lights as required A push button switch shall be conveniently located in the boiler house to start and stop the system A vacuum breaker operating automatically from a timer shall be provided in the bottom ash conveyor line to break the system vacuum 2231145 Controls Controls for a combination vacuum pressure system shall have a selector switch set to automatic position to start the unit in the vacuum cycle High level indicator in vacuum pressure vessel s
117. essive strength in accordance with Section 03 30 00 00 10 CAST IN PLACE CONCRETE Silo roof shall be reinforced concrete complete SECTION 23 70 01 00 10 Page 89 with 600 mm 24 inch square weatherproof hinged access door Handrail and steel toe board shall be provided all around the roof of the silo Live storage shelf for the silo shall be reinforced concrete sloped not less than 60 degrees from horizontal and supported by steel beams corbelled from the inside walls of the silo Live storage outlet hopper to chute and feeders shall be built of not lighter than 9 5 mm 3 8 inch steel Silo reserve storage floor shall be reinforced concrete sloped not less than 60 degrees and laid on well tamped fill material Reclaim outlet hopper to the chute feeding the flight feeder shall be built of not lighter than 9 5 mm 3 8 inch steel 30 14 2 Silo Interior Finish In a concrete stave silo the interior finish shall consist of a three coat concrete parget A brush coat scratch coat and a finish trowel coat shall be applied one after the other to produce a smooth monolithic finish The parget shall be worked into the vertical and horizontal grooves to permanently interlock the concrete staves 30 14 3 Silo Exterior Finish The exteriors of stave and concrete silos shall be covered with a brush coat of gray cement This coating shall be applied over all hoops lugs and staves to produce a homogeneous finish 2
118. eup Valve mergency f dwater makeup to connected to the surge tank and shall maintain a suitable minimum water level in the tank The f loat box shall be outside the tank and the connections shall be properly valved to permit blowdown and servicing 18 H EAT EXCHANGERS Heat exchangers shall be desig accordance with ASME BPVC SEC toth ned VILE DA 2 designs shall m designs shall meet th requirements of HEI 2623 requirements of HEI 2622 provided with relief valves as HEI Standards have the servic straight tube designs water inside the tubes with bol facilitate tube maint when there constructio shall refl n shall be ct th d Return servic nance as requir are no tubeside nozzle connections at the far end all carbon steel fabricated tested Additionally and stamped in heat exchanger d feedwater heater exchangers shall be Clos Heat required by ASME BPVC SEC VIII D1 and the Heat exchangers using service water shall be designed to The exchangers shall ted full diameter access channel be of covers to acceptabl Materials of service water side which bonnets ar water availabl When the tubes s Grade TP 304 When the servic stainless steels ASTM B111 B111M Alloy as follows lined with mo preferred wh movement that nel bellows expansion joint
119. exhaust while the discharge of the receiver is open or opening The air from the primary receiver shall enter an external secondary separator which shall remove 90 percent of the dust not collected by the primary receiver The combined efficiency of the primary and external secondary separators and tertiary bag filter shall be not less than 98 percent The secondary separator shall be similar to the primary receiver in construction but may be smaller and of lighter material No part of the discharger shall extend into the main storage bin A housing constructed of 6 2 mm 1 4 inch steel plate with a tight closing access door shall be provided as an enclosure for the discharger b The silo vent filter unit shall be mounted on top of the silo and shall act aS an air release unit to separate the air from the ash The ash shall drop into the silo Back cleaning of the bag filters shall be automatic utilizing plant air at approximately 690 to 860 kPa 100 to 125 psig Back cleaning unit shall be actuated whenever the ash handling system is in use Dust released from the filter bags in the back cleaning operation shall fall into the storage silo Housing shall be provided to allow the unit to operate exposed to the weather in ambient temperatures ranging from minus 40 to plus 55 degrees C minus 40 to plus 130 degrees F c A rotary dustless unloader shall be provided to eliminate
120. feed over the load range shall be provided These systems shall include weigh belt feeders rotary feeders screw conveyors or air swept feeders or gravity feed metered by weigh belt Rotary type feeders shall not be used as the primary pressure sealing device The fluidizing velocity in systems ranges from 4 3 to 9 1 m second 14 to 30 fps The design shall permit maintenance of full load with loss of a single feed point Screw conveyors shall be designed to operate continuously Sorbent feed for CFB systems shall be capable of providing the required proportion of sorbent over the load range These systems shall consist of a sorbent metering device weigh belt feeder and be fed by gravity pneumatic injection or air swept feeder The sorbent shall be fed in bed under bed or over bed and shall be fed separately from the fuel SECTION 23 70 01 00 10 Page 44 6 6 Fluidized Bed Combustion Area Parts subject to severe wear or deterioration shall be replaceable with a minimum of dismantling The fluid bed combustor shall be designed to insure that no combustion air entering the bed is allowed to bypass contact with bed solids Air distribution to the fluid bed will be through a number of nozzles located in the bed support plate Average superficial velocity above the bed at the point of fuel and limestone feed shall be between 1 2 to 3 7 m second 4 to 12 fps at bed temperature and mix zone pressure The pressur
121. ge 10 ASME ASME ASME ASME ASME ASME ASME ASME ASME ASTM ASTM ASTM ASTM ASTM ASTM ASTM B31 1 BPVC SEC I BPVC SEC IX BPVC SEC VIII D1 CSD 1 PTC 10 PIG 9 07 PTC 4 ASTM INTERNATIONAL A106 A106M A167 A179 A179M A242 A242M A249 A249M A285 A285M A350 A350M 2011 Standard for Gray Iron Threaded Fittings Classes 125 and 250 2013 Pipe Flanges and Flanged Fittings NPS 1 2 Through NPS 24 Metric Inch Standard 2012 Standard for Factory Made Wrought Steel Buttwelding Fittings 2014 INT 1 47 Power Piping 2010 BPVC Section I Rules for Construction of Power Boilers 2010 BPVC Section IX Welding and Brazing Qualifications 2010 BPVC Section VIII Rules for Construction of Pressure Vessels Division 1 2012 Control and Safety Devices for Automatically Fired Boilers 1997 R 2014 Performance Test Code on Compressors and Exhausters 2008 R 2013 Steam and Water Sampling Conditioning and Analysis in the Power Cycle 2013 Fired Steam Generators ASTM 2014 Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service 2011 Standard Specification for Stainless and Heat Resisting Chromium Nickel Steel Plate Sheet and Strip 1990 R 2012 Standard Specification for Seamless Cold Drawn Low Carbon Steel Heat Exchanger and Condenser Tubes 2013 Standard Spe
122. gh 600 mm 24 inches cast iron MSS SP 71 Type III or IV Class 125 b Valves for 150 pound class steel piping shall conform to the following 1 Sizes 65 mm 2 1 2 inches and less bronze MSS SP 80 Class 150 minimum 2 Sizes 80 mm 3 inches through 600 mm 24 inches steel ASME B16 34 Class 150 minimum flanged ends swing disc c Valves for system operating pressure greater than 1 4 MPa 200 psi shall be swing check or lift check valves having a steel body and shall be suitable for specified operating pressure but not less than Class 300 300 pound class Valves 40 mm 1 1 2 inches and smaller shall be cast or forged steel with socket welded ends Valves 50 mm 2 inch and larger shall be steel with butt welded ends Check valves shall have renewable composition discs or shall have metallic discs of the regrindable type which permits regrinding without removing valve from the line SECTION 23 70 01 00 10 Page 77 corrosion resistant trim and valve seats The valves shall be properly guided and shall be positive closing to prevent leakage Adjustment of the desired back pressure shall cover a range between 34 to 103 kPa 5 to 15 psig The adjustment shall b ffected externally and any shafts extending through the valve body shall be provided with adjustable stuffing boxes having renewable packing 2b Sheed Boiler Automatic Feedwater Recirculating Control Valve kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
123. grity of the hopper shall be based on the ash weight of 1120 kg cubic meter 70 pcf 3A ede Clinker Grinder kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Delete this paragraph if coal analysis indicates no possibility of slag formation kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Clinker grinder unit shall be provided with mm inch wide double roll for each hopper outlet gate housing The grinders shall have manganese steel rolls and cast iron housings with grinder shafts mounted on outboard bearings protected by a stuffing box and gland assembly Grinder shafts shall pass through stuffing boxes equipped with packing rings and lantern rings for seal water flow Clinker grinder shall be provided with a reversing mechanism to reverse direction of the grinder rolls should an obstruction stall the grinder A 9 5 mm 3 8 inch steel plate ejector feed hopper shall be furnished below each clinker grinder to feed the inlet of the pneumatic ash gathering system Fixed passages in the clinker grinders shall prevent discharge of particles too large to be handled by the pneumatic conveying system Each clinker grinder shall be driven by a totally enclosed type motor and shall be provided with a reversing starter pressure switch for seal water control diaphragm operated seal water SECTION 23 70 01 00 10 Page 93 valve and a solenoi
124. hall actuate necessary controls to cut off the vacuum gathering system and pressurize the vessel for pressure discharge of collected material A low pressure switch in the control panel shall sense the pressure drop in conveying pressure and shall return the unit to vacuum operation The unit shall operate continuously in this manner until manually shut down Setting selector switch in manual position shall shut the unit down after filling Discharge shall then be accomplished by pressing the manual discharge button A high vacuum switch with time delay shall be provided to shut the system down automatically in the event none of the inlet valves are actuated Switches and controls shall be heavy duty type in accordance with NEMA ICS 1 24 345 14 6 Automatic Air Valve Automatic air valve shall be provided at economizer or air preheater ash inlet hopper discharge slide gate to allow air into system without causing a vacuum within the boiler ash hopper Slide gate shall be provided as part of the ash system and shall be manually operated and interlocked to actuate the automatic air inlet valve SECTION 23 70 01 00 10 Page 95 2 20 4 Float and Thermostatic Traps Float and thermostatic traps shall be designed for a steam working pressure of 103 kPa 15 psig but shall operate with the supply pressure indicated for the system The trap capacity shall be based on a pressure differential of 15 kPa 2 psi The inlet t
125. hall be adjustable by positioning crank pin with micrometer setscrews Stroke length scale shall be divided in percentage graduations engraved on scale Cylinders shall be replaceable for increased or reduced pressure or capacity ranges Drive motors shall be suitable for the electrical power available and shall have drip proof enclosures Tanks shall be made of polypropylene and mounted on legs Tanks shall have filling and drain connections and gauge glass Each tank shall be furnished with one pump mounted and piped with black iron pipe and fittings with suction strainer and stainless steel screen and with 13 mm 1 2 inch relief valve with steel body and stainless steel trim Each tank shall have hinged cover Tank bottom shall be dished concave to a radius equal to the diameter of the tank Units shall be for phosphate or caustic feed and sulfite feeding Motor driven agitator shall be provided The pump shall be designed to feed the chemical solutions into the boiler feedwater system 24 2 Water Softening Equipment kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Need for softening equipment for makeup water will be as determined in accordance with UFC 3 410 01 or UFC 3 410 02 If water softening is not required delete the paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk A single
126. hall be divided into not less than four airtight zones for forced draft supply and shall have suitable zone control dampers with external indicating operating and locking devices 4 4 1 Grates Grates shall be either air cooled or water cooled with grate bars in intimate contact with the watertubes Grates shall have individually replaceable sections of iron or steel suitable for the temperatures encountered Pressure parts including watertubes headers and valves shall be suitable for boiler pressure specified and shall be constructed in accordance with ASME BPVC SEC I Grate sections shall be properly designed for even air distribution over th ntire grate area 4 4 2 Stoker Controls Stoker controls shall be designed for connection to the combustion control system to accurately regulate the coal feed rate and shall be arranged for manual operation independent of the combustion control system Variation of coal feed rate shall be accomplished by changing the length of time of vibrations Vibration generator shall be belt connected or gear connected to the electric motor Unit shall be free of any vibration that may damage SECTION 23 70 01 00 10 Page 37 lettering penetrating the black surface to expose the white Nameplates shall be mounted not more than 25 mm 1 inch below the instrument or gauge on the centerline The panel shall have continuous rapid start Fluorescent light fixtu
127. hall be gas tight and interior surfaces exposed to direct radiation and high temperatures shall be lined with approved refractory material to prevent excessive heat losses and warping of doors Doors too large or bulky for hand removal shall be hinged At least one observation port with cast iron cover shall be provided on the front and rear wall of the furnace Zig Dike d Miscellaneous Pipe Connections Miscellaneous pipe connections shall be provided for steam outlet safety valves feedwater feedwater regulator water column blowoff steam supply to soot blowers steam gauge and vent continuous blowdown continuous chemical feed and instrument connections Boilers shall be provided with necessary jets for furnace turbulence the number and arrangement of which shall be as recommended by the boiler manufacturer Soot blowers shall be provided if required by the manufacturer A suitable smoke outlet with steel frame damper and damper shaft shall be provided Damper shall have external high temperature roller or ball bearings at both ends of the shaft and shall have a suitable operating arm and rod 282 oO Superheater Design kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Delete if the boiler does not include a superheater kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk The design of the superheater shall be such that at any given
128. hall rest solidly on the pipe bed Piping connections to equipment shall be as indicated or as required by the equipment manufacturer Tank connections shall be made with two elbow swing joints or flexible connectors to allow for differential settlement The interior of the pipe shall be thoroughly cleaned of all foreign matter before being lowered into the trench and shall be kept clean during installation The pipe shall not be laid in water or when the trench or weather conditions are unsuitable When work is not in progress open ends of pipe and fittings shall be securely closed so that water earth or other substances cannot enter the pipe or fittings Any pipe fittings or appurtenances found defective after installation shall be replaced Threaded joints shall be made with tapered threads and shall be made perfectly tight with joint compound applied to the male threads only This requirement shall not apply for the gauging hatch or similar connections directly over the tank where the line terminates in a fitting within a cast iron manhole designed to allow for differential setting Where steel piping is to be anchored the pipe shall be welded to the structural steel member of the anchor and the abraded area shall be patched with protective coating or covering as specified Piping passing through concrete or masonry construction shall be fitted with sleeves Each sleeve shall be of sufficient length to pass through the entire thickness of th
129. he tubes are to contact with a slumped bed and or is maintenance problems due to moisture in a slumped bed SECTION 23 70 01 00 10 Page 43 2 6 5 Coal and Sorbent Feed Systems All equipment required to provide a boiler feed system to convey coal and sorbent to the boiler injection inlets shall be furnished All components of these systems shall be sized to provide flow of fuel and sorbent based on MCR condition in the boiler and the design coal and sorbent specified The system shall be designed to minimize the segregation or generation of fines 262521 AFB Coal Feed System Coal feed systems for AFB may be either pneumatic under bed or spreader stoker over bed For pneumatic under bed feed systems a feed point every 1 7 to 2 3 square meters 18 to 24 square feet shall be provided The system shall consist of a complete integrated system including weigh belt feeder lock hoppers and or other components necessary for the pneumatic fuel injection system Rotary type feeders shall not be used as the primary pressure sealing device The conveying air shall be considered part of the combustion air Coal feed shall be crushed to approximately 6 4 mm 1 4 inch and shall be capable of being used with fluidizing velocities ranging from 1 2 to 3 7 m second 4 to 12 fps For these systems sorbent may be mixed with the coal in the appropriate proportion and fed with the fuel However a separate sorbent feed system is acceptable O
130. ided between the drip pan elbow and the riser 3 4 9 Blowoff Valves Blowoff valves in tandem shall be provided at each point of blowdown as recommended by the boiler manufacturer Piping shall be extra heavy weight minimum steel pipe conforming to ASTM A106 A106M Grade B Blowoff valves shall be the balanced seatless type unless otherwise approved 23 34 70 Steam Nonreturn Valve Steam nonreturn valve of size and pressure rating shown shall be installed in the steam supply line from each boiler Valves shall be arranged to close automatically when there is a pressure differential of 34 5 kPa 5 psi between the boilers and steam headers and shall also be arranged to operate as stop valves Valves shall be set with the stem up either inclined or vertical and shall be of the rising stem type Valves shall be of the angle or straight way type and shall operate without chattering hammering or sticking Valves shall be cast steel 3 4 11 Feedwater Regulator Feedwater regulator sized for the application shall be connected complete with all necessary piping and accessories for automatic operation Valved bypass shall be provided around control valve Units shall be provided with device to lock regulator in existing position in case of power failure Units shall be provided with manual automatic selector panel located on instrument panel Feedwater control element shall be provided
131. in the cold water makeup line and in each boiler feedwater line Water meters shall be disk type with reinforced disk for hot water above 65 degrees C 150 degrees F and rubber or synthetic polymer disk for cold water and shall be constructed of bronze composition and cast iron protected by noncorrosive coating Moving parts subject to wear shall be easily removable Meters shall conform to the requirements of AWWA C700 24 CHEMICAL TREATMENT AND WATER SOFTENING EQUIPMENT kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Inapplicable type of chemical feeder will be deleted in accordance with the requirements of UFC 3 410 01 or UFC 3 410 02 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk 24L Chemical Feeder A feeder unit shall be provided for each boiler Chemical feeder shall be automatic proportioning shot or pump type All appurtenances necessary for satisfactory operation shall be provided Size and capacity of feeder shall be based upon local requirements and water analysis Chemical feed pumps and tanks shall be furnished as a package with the pumps mounted on and piping connected to the tank The pump cylinders plungers ball check valves and check valve bodies shall be of corrosion resistant materials suitable for the chemicals being pumped Volumetric accuracy of the pumps shall be within one percent over the range indicated Pump capacities s
132. ing headers and equipment but not shown shall be provided under this section Material used for supports shall be as specified under Section 05 12 00 STRUCTURAL STEEL FA 3 02333 Structural Attachments Structural steel brackets required to support piping headers and equipment but not shown shall be provided under this section Material used for supports shall be as specified under Section 05 12 00 STRUCTURAL STEEL 3 5 4 Anchors Anchors shall be provided wherever necessary or indicated to localize expansion or prevent undue strain on piping Anchors shall consist of heavy steel collars with lugs and bolts for clamping and attaching anchor braces unless otherwise indicated Anchor braces shall be installed in the most effective manner to secure the desired results using turnbuckles where required Supports anchors or stays shall not be attached where they will injure the structure or adjacent construction during installation or by the weight of expansion of the pipeline FID Pipe Expansion Ie Bs SL Expansion Loops kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE Wherever possible provision for expansion of steam supply and return pipes will be made by changes in the direction of the run of the pipe or by field fabricated expansion bends kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
133. ing is required using different materials this paragraph shall be rewritten If double wrap system is required the designer shall remove the brackets kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Bituminous protective system shall be a coal tar enamel and primer coating n ECTION 23 70 01 00 10 Page 106 system and shall consist of a coal tar priming coat a coal tar enamel coat a wrapper of coal tar saturated felt and a wrapper of kraft paper or a coat of water resistant whitewash applied in the order named and conforming to the requirements of AWWA C203 in all respects as to materials methods of application tests and handling except that an interior lining shall not be applied In addition wher xcessively corrosive soils are encountered the piping shall be given a second coating of coal tar enamel and a second wrapper of felt Joints and fittings shall be coated and wrapped 64 3 2 Polyethylene Pipe Coating Continuous extruded polyethylene coating and adhesive undercoat application procedure including surface preparation shall be a factory applied system conforming to NACE SP0185 Type A Joints valves flanges and other irregular surfaces shall be tape wrapped as outlined under the tape wrapping system except that the tape shall be applied half lapped and all extruded polyethylene coating and adhesive undercoat surfaces to be tape wrapped shall be primed with a c
134. inkages for hand operation from the front of the boiler Electric motor shall be belt connected to an efficient gear reduction unit which shall drive the feed screw and forced draft fan Gear reduction unit shall be immersed in oil ina dustproof housing Stoker controls shall be suitable for connection to the combustion control system to accurately regulate the coal feed rate Feed rate control shall allow manual setting for not less than three speeds and neutral in equal increments with speed changes possible while stoker is running A suitable release shall protect the coal feeding mechanism from injury in case foreign materials obstruct normal operation Motors shall be totally enclosed fan cooled type for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with general purpose dust tight explosion proof enclosure Hoppers shall be constructed of 6 4 mm 1 4 inch steel sheet minimum shall be reinforced and shall have a capacity of not less than kg pounds Hoppers shall be provided with suitable cleanout Feed screw shall be removable and conveyor compartment shall have cleanout Stoker shall rest on boiler room floor 2 4 3 Conveyor Stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
135. intermediate points on suitable tracks or skids v4n BAZ Grate Operation kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Steam driven boiler auxiliaries will not be used unless the exhaust steam can be utilized completely Reference to steam drives will be deleted if inapplicable for the equipment specified kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk Conveyor grate shall be driven by electric motor connected through a suitable speed reduction unit steam hydraulically operated variable speed drive Gears and chains required for the drive shall be enclosed in a dustproof and oil tight housing Main shafts for the grates shall have a forced system of lubrication with fittings located outside the casing or have self lubricating bearings If the forced lubrication system is supplied bearings shall be fitted with dust seals and easily accessible forced lubrication fittings Stoker controls shall be suitable for connection to the combustion control system to accurately regulate the coal feed rate Manual setting of the coal feed rate by varying stoker feed as required to maintain any desired capacity between 25 to 125 percent of boiler capacity shall be possible without disconnecting linkage Feed rate shall be changed by varying the speed of the grate Air volume shall automatically vary in direct proportion with the feed rate Possible feed
136. kkkkkkk NOTE Where fans are not protected by electrostatic precipitators or baghouse filters on boilers of 4540 kg per hour 10 000 pounds per hour and larger provide liners for scroll sheets and rotor blades Induced draft fan outlet dampers may not be required in single fan single boiler installations except to eliminate the stack effect during outages kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Centrifugal fans conforming to AMCA 801 Type I Type II forced draft and induced draft shall be furnished as an integral part of boiler design Fans shall be centrifugal with backward curved blades radial tip blades or axial flow type Each fan shall be sized for an output volume and static pressure rating sufficient for pressure losses excess air requirements at the burner or grate leakages temperature and elevation corrections for a dirty boiler with worst ambient conditions all at full combustion to meet net rated output at normal firing condition In addition fan sizing shall include margins of 10 percent volume and 21 percent static pressure plus margins of 5 degrees C 10 degrees F for forced draft fans and 22 degrees C 40 degrees F for induced draft fans Induced draft fans shall be designed for handling hot flue gas at the maximum boiler outlet temperature adjusted for boiler surface fouling Induced draft fans shall be provided with outlet dampers Noise levels for fans shall not exceed
137. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Expansion loops shall provide adequate expansion of the main straight runs of the system within the stress limits specified in ASME B31 1 The loop shall be cold sprung and installed where indicated Pipe guides shall be provided as indicated Except where otherwise indicated expansion loops and bends shall be utilized to absorb and compensate for expansion and contraction instead of expansion joints 30 Oa 2 Expansion Joints kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE If expansion joints are not required this paragraphs will be deleted Where space limitations prevent such provisions for expansion expansion joints will be installed and blanks will be filled as appropriate kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Expansion joints shall provide for either single or double slip of the n ECTION 23 70 01 00 10 Page 105 those used on the pipe or may be field coated with a two part epoxy system recommended by the manufacturer of the pipe coating system Field protection may also be provided for joints and fittings with a coal tar tape hot applied over a compatible primer 673 25 Coating Inspection and Testing After field coating of the pipe joints th ntire pipe shall be inspected with an electric holiday detector having an operating crest voltage of from 12 000 to 15 000 volts when using a fu
138. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SECTION 23 70 01 00 10 Page 57 will not exi t he combusti st CFB boilers may introduce as much as 40 to 50 percent of on air as secondary air in one or more stages at various locations above the distribution plate The boiler and boiler accessories S S Cc e hall be spe orbent Th oal and sor conomizer cifically designed to operate with the specified fuel and e boilers shall be complete with the required crushers dryers bent handling systems burners ignitors air preheater soot blowers boiler controls and instrumentation furnace ash handling system draft systems and superheater where required 6 1 General T he design materials and construction of equipment furnished shall conform to the applicable requirements of ASME BPVC SEC I and NFPA 85 Furnish the Manufacturer s Data Report required by ASME BPVC SEC I certified by the Authorized Inspector located in the manufacturer s shop Full provision shall be made so that each component can expand and contract under the operating cycle of temperatures without damage to itself or to any adjoining component and without the leakage of any contained fluid fe S b utwards or of air either inwards or outwards The design of the unit hall accommodate thermal movement without side effects such as tearing uckling di stortion or vibration The design of the unit sh
139. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Continuous blowdown valve shall be manual proportioning type fabricated of corrosion resistant steel The valve shall be equipped with a micrometer dial and pointer to indicate the proportional setting 3 4 8 Safety Valves Safety valves of proper size and of the required number and construction and set pressures shall be in accordance with of the ASME BPVC SEC I and shall be installed so that the exhaust steam will discharge through pipes extending through the roof Each exhaust riser shall have a drip pan elbow to prevent the accumulation of water on the valve A suitable slip joint shall be provided between the drip pan elbow and the riser 3 4 9 Blowoff Valves Blowoff valves in tandem shall be provided at each point of blowdown as recommended by the boiler manufacturer Piping shall be extra heavy weight minimum steel pipe conforming to ASTM A106 A106M Grade B Blowoff valves shall be the balanced seatless type unless otherwise approved 23 34 70 Steam Nonreturn Valve Steam nonreturn valve of size and pressure rating shown shall be installed in the steam supply line from each boiler Valves shall be arranged to close automatically when there is a pressure differential of 34 5 kPa 5 psi between the boilers and steam headers and shall also be arranged to operate as stop valves Valves shall be set with the stem up either inclined or
140. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk USACE NAVFAC AFCEC NASA UFGS 23 70 01 00 10 January 2008 Preparing Activity USACE Superseding UFGS 23 70 01 00 10 October 2007 UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated October 2015 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk SECTION TABLE OF CONTENTS DIVISION 23 HEATING VENTILATING AND AIR CONDITIONING HVAC SECTION 23 70 01 00 10 CENTRAL STEAM GENERATING SYSTEM COAL FIRED 01 08 PART 1 GENERAL EFERENCES UBMITTALS UALITY ASSURANC Welding Use of Asbestos Products ELIVERY STORAGE AND HANDLING XTRA MATERIALS GI HINOJ 6a e a a a S H E aS E w PART 2 PRODUCTS GI MATERIALS AND EQUIPMENT sE Standard Products A Nameplates 23 Prevention of Rust Equipment Guards and Access ERS Capacity Electrical Equipment sI otor Ratings az otor Starters Boiler Design Requirements al Radiant Heating Heat Input Combustion Gas Ash Discharge Radiant Heating Surface Furnace Volume Boiler Operating Capacity Boiler Output Capacity Boiler Markings DETAILS 22 3 Packaged Steam Generating Units Qed PA ond Firebox Type for Boiler Capacities Less Than 2 9 Mega watts 10 000 000 Btuh PPP W e O 2 E NNNNNNN NN NNNNNNNNNNNN DN NH NNNNNNNNNWNH
141. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk SECTION 23 70 01 00 10 Page 69 Water meter including the thr valve bypass and connections shall be provided in the cold water makeup line and in each boiler feedwater line Water meters shall be disk type with reinforced disk for hot water above 65 degrees C 150 degrees F and rubber or synthetic polymer disk for cold water and shall be constructed of bronze composition and cast iron protected by noncorrosive coating Moving parts subject to wear shall be easily removable Meters shall conform to the requirements of AWWA C700 24 CHEMICAL TREATMENT AND WATER SOFTENING EQUIPMENT kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Inapplicable type of chemical feeder will be deleted in accordance with the requirements of UFC 3 410 01 or UFC 3 410 02 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk 24L Chemical Feeder A feeder unit shall be provided for each boiler Chemical feeder shall be automatic proportioning shot or pump type All appurtenances necessary for satisfactory operation shall be provided Size and capacity of feeder shall be based upon local requirements and water analysis Chemical feed pumps and tanks shall be furnished as a package with the pumps mounted on and piping connected to the tank The pump cylinders plungers ball check valves and check valve bodies shall be of cor
142. kkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE If automatic recirculation valve is not utilized delete this paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Valve shall be the self contained self powered type The unit shall automatically program the recirculation flow when required and assume all functions for prevention of the backflow of the main feedwater flow for detection of low flow for cycling of the control valve and for the pressure reduction for liquid delivery to the low pressure feedwater heater The valve assembly shall be flanged type with flanged spools provided in both the main line and recirculation line for ease of disassembly E E Exhaust Heads Exhaust heads for the discharge of steam to atmosphere shall be one piece plate steel semisteel or cast iron construction with internal baffle arrangement for the removal of entrained condensate and oil and with provision for drain connection Flow area through unit shall be larger than connecting pipe 2T Strainers The strainer body connections shall be of the same size as the pipelines in which the connections are installed The strainer bodies shall be heavy and durable cast steel or gray cast iron The bodies shall have arrows clearly cast on the sides to indicate the direction of flow Each strainer shall be equipped with an easily removable cover and sediment basket The basket shall be not less than 0 63
143. kkkkkkkkkkkkxkkk NOTE Any paragraphs describing stoker equipment not necessary for the system specified will be deleted SECTION 23 70 01 00 10 Page 35 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Conveyor stokers shall be of the grate level feed forced draft chain grate traveling grate type with hoppers feed gate drive shaft sprocket wheels grate electric motor steam drive and all necessary auxiliary equipment Coal shall be fed automatically at a constant rate from the hopper onto the moving grate and shall be evenly distributed across the full width of the grate The stoker frame shall be provided with not less than four air tight zones for supply of forced draft and shall have suitable zone control dampers with external indicating operating and locking devices 24 3 1 Grates Grates shall have individual sections constructed of heavy duty heat resisting cast iron shall be fitted or cored for proper air distribution and shall be designed for easy replacement of individual sections Chain grates shall have staggered links connected by pins to form a continuous flat chain the full width of the furnace Traveling grates shall have grate blocks mounted on carrier bars which in turn shall be fastened to two or more drive chains to form a continuous flat grate surface the full width of the furnace Continuous grates shall be supported at the ends by suitable sprockets and at
144. l be a self contained refrigerated type complete with refrigeration compressor heat exchanger automatic controls and moisture removal trap or a regenerative desiccant type dryer as required The refrigeration unit shall be the hermetically sealed type capable of continuous operation at maximum load conditions SECTION 23 70 01 00 10 Page 75 eZee PIPING Unless otherwise specified herein pipe and fittings shall conform to ASME B31 1 e 2h Pipe 7 H Pipe material shall be as specified in TABLE alta 2 Fittings Pipe fittings shall be as specified in TABLE II e213 Nipples Nipples shall conform to ASTM A733 Type I or II as required to match adjacent piping 27 4 Unions Unions shall conform to ASME B16 39 type as required to match adjacent piping T 22155 Pipe Threads Pipe threads shall conform to ASME B1 20 2MASME B1 20 1 right or left hand tapered thread as required 27 6 Expansion Joints 627 661 Guided Slip Tube Type Expansion Joints kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Wherever possible provision for expansion of steam supply and return pipes will be made by changes in the direction of the run of the pipe or by field fabricated expansion bends If expansion joints are not required applicable paragraphs will be deleted Where space limitations prevent such provisi
145. l be base mounted with electric motor drive and all required heat exchangers separators and control valves The vacuum pump inlet piping shall be provided with a vacuum filter unit to remove the fly ash obtained from the economizer ash hopper The filter unit shall include a metal housing containing filter bags and an automatic air purge back washing system A water spray shall be incorporated into the filtering unit The filtering unit shall remove all fly ash before discharge to the atmosphere 2a Bld Control Cabinet Control cabinet for the complete operation of the system shall be supplied and shall include all running indicating lights as required A push button switch shall be conveniently located in the boiler house to start and stop the system A vacuum breaker operating automatically from a timer shall be provided in the bottom ash conveyor line to break the system vacuum 2231145 Controls Controls for a combination vacuum pressure system shall have a selector switch set to automatic position to start the unit in the vacuum cycle High level indicator in vacuum pressure vessel shall actuate necessary controls to cut off the vacuum gathering system and pressurize the vessel for pressure discharge of collected material A low pressure switch in the control panel shall sense the pressure drop in conveying pressure and shall return the unit to vacuum operation The unit
146. l be designed to insure that no combustion air entering the bed is allowed to bypass contact with bed solids Air distribution to the fluid bed will be through a number of nozzles located in the bed support plate Average superficial velocity above the bed at the point of fuel and limestone feed shall be between 1 2 to 3 7 m second 4 to 12 fps at bed temperature and mix zone pressure The pressure drop through the air distributor plate shall be 3 7 kPa 15 inches water gauge minimum The walls of the fluid bed combustor shall be constructed of water cooled tubes which form a part of the steam water circuit of the boiler These walls shall be of membrane wall type of construction The distributor shall be designated to assist with removal of large tramp material where expected ROPA Bed Material Letdown System The bed material letdown system shall be capable of removing and cooling solids from the bed including spent sorbent unfired fuel bottom ash rocks and debris The system shall be designed to operate continuously and to cool all the solids going to disposal to 135 degrees C 275 degrees F or less The system shall be sized to continuously remove at least 80 percent of the total solids generated from the boiler unless otherwise approved The design of the bed letdown system shall include personnel safety considerations such as prevention of spillage of hot bed material from the unit 6 8 Burners
147. l be furnished SECTION 23 70 01 00 10 Page 28 2 complete wi with the manufacturer s recommendations permanently mounted rotary type manual th necessary auxiliaries and shall be connected in accordance Soot blowers shall be ly operated by a single chain Valve shall be quick opening positive cl head external to the boiler furnace gases he element he operati Chains shall ng floors B be continuous ecommendations electrically operated losing type located in the blower with the working parts protected from the and valve shall be operated by the same chain that rotates extending to within easy reach of lowers shall be furnished complete with necessary uxiliaries and shall be connected in accordance with the manufacturer s rotary or retractable type except hat soot blowers exposed to e provided with a quick opening he blower head external to the boiler rom the furnace gases otates the element hall have either single mo dual rack and pinion drives protective steel housing starters and pushbutton sta tor driven tions 4 STOKER EQUIPMENT The boiler manufacturer shall certify that th Stokers shall be capable of satisfactory for the boiler design ue a ja flue gas temperatures over 815 degrees C 1 500 degrees F shall be retractable type only b E r S Rotary type soot blo
148. l be provided eal IGNITION OIL SYSTEM kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Wherever light oil is required as a support and or ignition fuel a complete ignition oil system must be provided The system should include two full size rail truck unloading pumps capable of unloading a rail shipment in one 8 hour shift or a truck shipment in 1 hour one ignition oil storage tank capable of storing either 88 hours continuous plant ignition fuel demand or one rail shipment whichever is larger two full size ignition oil supply pumps per boiler unit each capable of supplying the maximum ignition oil demand for each boiler unit and one ignition oil day tank per boiler unit capable of storing 8 hours of continuous boiler ignition oil demand Both the ignition oil transfer and boiler ignition supply pumps should be centrifugal type where allowed by suction conditions and discharge flow pressure requirements otherwise positive displacement pumps shall be used kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk ETa Ignition Oil Pumps Ignition oil pumps shall be furnished as duplex types assuring 100 percent standby Pumps shall be provided complete with coupling coupling guard and electric motor shop mounted and aligned on a common skid a T2 Burners Where indicated and specified each boiler shall be provided with oil fi
149. l conform to the following 1 Sizes 65 mm 2 1 2 inches and less bronze MSS SP 80 Type 1 2 or 3 Class 150 minimum 2 Sizes 80 mm 3 inches through 600 mm 24 inches steel ASME B16 34 Class 150 minimum flanged ends c Valves for system operating pressure greater than 1 4 MPa 200 psi shall be suitable for specified operating conditions but not less than 300 pound class Valves 50 mm 2 inch and smaller shall be forged steel with socket welded ends Valves 65 mm 2 1 2 inches and larger shall be steel and shall have butt welded ends Valves shall have renewable SECTION 23 70 01 00 10 Page 78 flat metal seats 2 27 7 4 Steam Pressure Reducing Valves kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Single seated valves should be used when a dead end shutoff of the steam is required When a thermostatically controlled valve is installed after and near the reducing valve in a manner to cut off the passage of steam the single seated valve should be used Double seated valves may be used where the low reduced pressure lines will condense enough steam to offset normal leakage through the valve Under conditions of widely varying initial pressure double seated valves usually give closer control of reduced pressure kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Reducing valves designed for the working pressure shown but not for less tha
150. l flanged connections 6 6 Buried Fuel Piping Buried fuel piping shall be in accordance with Section 33 56 10 FACTORY FABRICATED FUEL STORAGE TANKS at CATHODIC PROTECTION Cathodic protection shall be in accordance with Section 33 56 10 FACTORY FABRICATED FUEL STORAGE TANKS SS FIELD PAINTING kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Where identification of piping is required by the using service this paragraph will be amplified to include appropriate requirements either directly or by reference to a separate section Air Force requirements are covered in AFM 88 15 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk All ferrous metals not specified to be coated at the factory shall be cleaned prepared and painted as specified in Section 09 90 00 PAINTS AND COATINGS Exposed pipe covering shall be painted as specified in Section 09 90 00 PAINTS AND COATINGS Aluminum sheath over insulation shall not be painted 9 CLEANING OF BOILERS AND PIPING FOR TESTING 7922 Boiler Cleaning After the hydrostatic tests but before the operating tests the boilers shall be cleaned of foreign materials Wherever possible surfaces in contact with water shall be wire brushed to remove loose material The Contractor may use the following procedure or may submit his own standard procedure for review and approval by the Contracting Officer Boiler
151. l pipe ends shall be gauged FRP pipe shall be utilized for buried piping only No aboveground FRP pipe is allowed Cutting shall be done with a hacksaw or circular saw with an abrasive cutting wheel VOD e1 Installation Pipe shall be buried to the elevation shown on the profiles except that in no case shall pipe under roadways be buried less than 900 mm 36 inches Backfill shall not include large or sharp edged rocks of any size in direct contact with the pipe surfaces Compacting shall be done so as to avoid damage to the pipeline Conduits or sleeves of steel pipe at least 50 mm 2 inches in diameter larger than the FRP pipe size shall be provided under heavy traffic roadways Bending of pipe to follow ditch contours shall be limited to long trench curvatures and will not be permitted for abrupt changes in pipe direction Bend radii shall not be less than shown in the manufacturer s installation procedures PE o E Thrust Blocks Concrete thrust blocks shall be provided at all tees valves blind flanges reducers or whenever the pipe alignment changes direction They shall be sized in accordance with the pipe manufacturer s instructions to suit local soil conditions operating pressures test pressures pipe size and thermal conditions In case of a conflict the most stringent requirements shall govern SOR RORMES Curing of Field Bonded Joints All field bo
152. lic plexiglass and all nomenclature shall be engraved on front surface in black lettering Plug in alarm module shall include epoxy circuit board one reversible plug in relay one general purpose plug in relay relays with dust covers two selector switches for relay contact selection and two lamps wired in parallel at 24 volts dc 6 watts Flasher module shall be mounted and prewired with silence and test pushbuttons Alarm horn shall be remotely mounted and of general purpose construction Input voltage shall be 120 volts ac 60 cycle Power supply of 120 volts to 24 volts dc output of volt ampere capacity shall be provided to suit load Alarm sequences of panel shall provide for first alert sequence with manual reset and ringback sequences Annunciator panel shall be prewired internally to a rear terminal strip 9x9 Combustion Control Components Components shall conform to the requirements of paragraph COMBUSTION CONTROL EQUIPMENT SECTION 23 70 01 00 10 Page 56 2 9 10 Steam and Feedwater Flow Measurement Flow nozzles shall be provided to measure the steam flow from each boiler and each main steam header outlet Orifice plates shall be provided to measure feedwater flow to each boiler Nozzles and orifice plates shall be flange mounting type and made of stainless steel Orifice plates shall be of the square edge concentric paddle type designed for flange taps
153. ll be degrees C degrees F based on excess air of percent and carbon loss of percent at maximum continuous capacity Moisture in steam and boiler water concentrations shall be in accordance with ABMA Boiler 402 Ze lus 8 Boiler Output Capacity Output capacity of the boiler shall be based on tests of the boiler as a unit 22239 Boiler Markings kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE Delete brackets if the boiler does not include a superheater kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Each boiler shall be stamped with a Maximum continuous capacity in Watts Btuh b Radiant heating surface in square meters feet c Total heating surface in square meters feet d Furnace volume in cubic meters feet e Boiler unit design maximum allowable working pressure f Superheater final steam temperature in degrees C degrees F g Superheater heating surface in square meters feet 28 BOILER DETAILS 233 041 Packaged Steam Generating Units Submit manufacturer s design data and structural computations for walls roof foundations and other features for specialty type of construction Include design data for lateral forces that may be encountered due to wind loads and seismic forces Submit 6 complete copies of operating instructions prior to the training course outlining the step by step procedures re
154. ll be complete with m feet of 32 mm 1 1 4 inch diameter manila rope with a breaking strength of 60 kN 13 500 pounds minimum 19 mm 3 4 inch diameter marline covered standard steel wire rope with a breaking strength of 170 kN 37 600 pounds minimum and a steel car pulling hook with an allowable rope pull of 45 kN 10 000 pounds so fabricated as to be readily attachable to and removable from the car frames 2o0713 Coal Bunkers Suspension coal bunkers of size and capacity indicated shall be constructed of ASTM A36 A36M steel plate reinforced and braced as required and installed dust tight Bunkers shall be provided of a design optimized for coal flow not susceptible to rat holing or hangups Cylindrical or silo type bunkers to reduce stagnation shall be provided for each boiler each with conical discharge hoppers and slopes not less than 70 degrees The outlet cone shall be manufactured of or lined with ASTM A167 Type 304 stainless steel Bunkers shall be provided with rack and pinion type coal shutoff valves self cleaning and dust tight Valve materials exposed to flowing coal shall be of corrosion resistant steel An emergency diverter shall be provided for emptying the bunker 30 14 Coal Storage Silos 30 14 1 Silo Design Silo walls may be slip formed cast in place reinforced concrete precast concrete or other approved construction materials Concrete shall have a 28 day compr
155. ll be simplex type single stage double acting with water jacketed cylinder fitted with intake and discharge valves of the lightweight feather disc or plate type and shall be provided with necessary controls water cooled aftercooler moisture separator drive receiver relief valves and cooling water controls as indicated or required The compressor air intake shall be provided with a low drop type air suction filter silencer suitable for outdoor installation The aftercooler shall be the shell and tube type designed for air flow through the tubes with steel shell internal baffle plates and Admiralty metal tubes expanded into Muntz metal tube sheets The moisture separator shall be provided with an automatic water discharge trap and level gauge The air receiver shall be vertical type constructed in accordance ASME BPVC SEC VIII D1 for unfired pressure vessels for 1 4 MPa 200 psi working pressure and shall be equipped with flanged inlet and outlet connections valved drain connection 152 mm 6 inch dial pressure gauge pop safety valves and regulator connections Cooling water controls for regulating compressor cylinder water temperature and aftercooler water temperature shall be thermostatic valve type and shall be installed with a three valve bypass in the water outlet lines ahead of open sight drain funnels The compressor shall be equipped with adjustable pressure type unloader controls suitable for continuous compressor operation
156. ll ring spring type coil electrode The holiday detector shall be equipped with a bell buzzer or other audible signal which operates when a holiday is detected All detected holidays in the protective covering shall be repaired Occasional checks of holiday detector potential will be made by the Contracting Officer to determine suitability of the detector The inspection for holidays shall be performed just before covering the pipe with backfill and every precaution shall be taken during backfill to prevent damage to the protective covering Equipment and labor necessary for inspection shall be furnished by the Contractor 6 4 Installing Buried Piping Pipe and accessories shall be handled carefully to assure a sound undamaged condition Care shall be taken not to damage coating when lowering pipe into a trench and when backfilling Nonmetallic pipe shall be installed in accordance with pipe manufacturer s instructions Underground pipelines shall be laid with a minimum pitch of 25 mm per 15 m 1 inch per 50 feet Horizontal sections shall have a minimum coverage of 450 mm 18 inches Piping shall be free of traps and shall drain toward tank The full length of each section of underground pipe shall rest solidly on the pipe bed Piping connections to equipment shall be as indicated or as required by the equipment manufacturer Tank connections shall be made with two elbow swing joints or flexible connecto
157. load and to th xtent feasible all elements have the same outlet temperature Th superheater tube and support materials shall be chosen so that with any reasonably expectabl xcess air and the worst expected unbalance in air steam and fuel distribution there is an ample and conservative margin of safety to prevent damage by overheating or corrosion to the components Pad type permanent thermocouples shall be installed on superheater tubes in sufficient number and so located as to indicate the variation in and maximum value of the tube temperature across the furnace width The thermocouples shall be located outside of the gas stream The superheater outlet header shall be capable of absorbing the reactions from the main SECTION 23 70 01 00 10 Page 23 steam piping The superheater terminals shall be extended sufficiently clear of the boiler walls to facilitate connecting thereto Any superheater piping must b xtended beyond the boiler front wall line 900 mm 3 feet beyond casing Header penetrations through the casing shall be minimized Adequate superheater piping to mount the safety valves shall be provided The design shall be such as to minimize external corrosion on the superheater and reheater due to molten slag or fouling The location of headers in the gas stream shall be minimized Spray desuperheaters shall be complete with thermal sleeves of sufficient length to prevent droplets of water f
158. n 1 4 MPa 200 psig shall be provided wherever indicated or required Each reducing valve shall be adjusted to maintain the desired terminal pressure regardless of fluctuations in the initial pressure The valves shall be single seated doubled seated spring loaded quiet in operation and shall not stick internally Pilot operated valves or other controllers using steam or compressed air for operating medium shall be provided Valves 65 mm 2 1 2 inches and larger shall be cast steel cast iron or semisteel as required for the steam pressure Valves 50 mm 2 inches and smaller shall be bronze Valve trim for iron body valves shall be stainless steel nickel copper or other approved corrosion resisting material All parts subject to wear shall be readily renewable Valves shall have seats and plugs faced with a cobalt tungsten carbide mixture or made of heat treated stainless steel or a high chromium steel designed to resist erosion Seat and plug facing shall have a Brinell hardness of not less than 450 Each valve shall be installed with a strainer a three valve bypass and a safety relief valve as indicated Where pressure reducing valves are used for reducing the steam pressure to the deaerating heater the valves shall be the single seated type The sensing lines shall be connected to the steam space in the deaerator or at least 3 m 10 feet downstream of the pressure reducing valve
159. n a trough constructed of 9 5 mm 3 8 inch cast iron extending from mm inches in front of the foot shaft to mm inches behind the head shaft and set flush with the floor The return strand of chain shall be carried in angle runways set flush with the trench floor The drag chain conveyor shall be driven by a mm inch pitch roller chain and mm inch pitch diameter tooth sprocket on the drive shaft anda mm inch pitch diameter tooth sprocket on the elevator foot shaft PE R 52 Casing The casing shall be constructed of 2 656 mm 12 gauge thick steel minimum with 9 5 mm 3 8 inch thick boot plates The head end drive shall include a gear motor and steel roller chain complete with drive brackets guards and SECTION 23 70 01 00 10 Page 97 backstop 231 The instrumentation and system panel shall contain all are 62 Ash Handling Controls ash handling system control panel shall conta including selector switches ann ammeters required for monitoring and operatio The panel shall graphically display the necessary timers relays required for the control system Control and in all necessary unciators push butto n of the ash handling system In addition and terminal blocks The elevator shall be equipped with head end platform and ladder ns the that removal system shall be from a si buttons to start automatic operation of each
160. n one 8 hour shift or a truck shipment in 1 hour one ignition oil storage tank capable of storing either 88 hours continuous plant ignition fuel demand or one rail shipment whichever is larger two full size ignition oil supply pumps per boiler unit each capable of supplying the maximum ignition oil demand for each boiler unit and one ignition oil day tank per boiler unit capable of storing 8 hours of continuous boiler ignition oil demand Both the ignition oil transfer and boiler ignition supply pumps should be centrifugal type where allowed by suction conditions and discharge flow pressure requirements otherwise positive displacement pumps shall be used kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk ETa Ignition Oil Pumps Ignition oil pumps shall be furnished as duplex types assuring 100 percent standby Pumps shall be provided complete with coupling coupling guard and electric motor shop mounted and aligned on a common skid a T2 Burners Where indicated and specified each boiler shall be provided with oil fired burner or burners The burner assembly and control systems shall conform to UL 296 UL 726 and NFPA 85 except as otherwise specified Supervised manual semiautomatic and fully automatic combustion safety controls shall conform to NFPA 85 and ASME CSD 1 hed Aboveground Oil Storage Tanks Aboveground oil storage tanks and associated piping systems shall be in accordance with Sec
161. nances necessary for the motor starter specified Manual or automatic control and protective or Signal devices required for operation specified and any wiring required to such devices not shown on the electrical drawings shall be provided Where two speed or variable speed motors are indicated solid state variable speed controllers may be provided to accomplish the same function a3 Boiler Design Requirements a2 sak Radiant Heating kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The following is a guide to determine maximum radiant heat release Boiler Type Maximum kJ sq meter Btuh sq ft Controlled circulation 1 419 500 125 000 watertube boilers Natural circulation watertube 1 135 650 100 000 boilers Firetube boilers 1 135 650 100 000 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk The maximum effective radiant heating surface shall be limited to watt per square meter input Btu input per square foot per hour AES Heat Input The maximum heat input per cubic meter cubic foot of furnace volume shall be 931 5 Megajoules cubic meter 25 000 Btu cubic foot with spreader stokers 1 7 Gigajoules cubic meter 45 000 Btu cubic foot with underfeed stokers PS ES Combustion Gas The combustion gas temperature at the furnace exit shall be a minimum of 38 degrees C 100 degrees F less than the ash fusion softening temperature reducing atmo
162. nd over 5 1 m per second1 000 feet per minute cu f minute e2ory eS Cabinet Unit Heaters Heaters shall be centrifugal fan type arranged for floor or ceiling mounting as indicated The heating elements and fans shall be housed in steel cabinets with angle iron frames The cabinets shall be of not lighter than 0 912 mm 20 gauge steel Each unit heater fan discharge shall be provided with an approved cei Mnent for air diffusion and distribution The fans shall be mounted on a common shaft with one fan to each air outlet The fan shaft shall be equipped with self aligning ball or roller bearings accessible for lubrication The fan shaft shall be either directly connected to the driving motor or indirectly connected by adjustable V belt drive rated at 150 percent of motor capacity All exposed moving parts shall have guards All fans in any one unit heater shall be the same siz 25 1 4 Heating Elements Heating coils shall be copper and radiating fins may be copper aluminum SECTION 23 70 01 00 10 Page 73 weld before welding and the weld shall be finished before the materials cool to 0 degrees C 32 degrees F Sepa 2 24 Defective Welding Defective welds shall be removed and replaced Repairing of defective welds shall be in accordance with ASME B31 1 E PORTAAT Electrodes After filler metal has been removed from its original package it shall be protected or stored so that i
163. nded epoxy cemented joints regardless of ambient temperatures shall be cured with a self regulating thermostatically controlled electrical heating blanket for the time and temperature recommended by the manufacturer for the applicable size and type of joint or by an alternate approved heating method The joined sections shall not be moved during heating or before the joint has cooled to 27 degrees C 80 degrees F or to ambient temperature whichever is higher 65 D4 Metal to FRP Connections Metal to FRP connections shall be made with flanged connections Steel flanges for bolting to FRP flanges shall be flat faced type Wher raised face steel flanges are used spacer rings shall be utilized to provide a flat face seat for FRP flanges A full face Buna N gasket 3 2 mm 1 8 inch thick with a shore hardness of 50 to 60 shall be used between n ECTION 23 70 01 00 10 Page 109 2a27 122 Gate Valves Gate valves used as shutoff valves in the boiler leads to the steam headers and elsewhere as indicated shall be of the chain operated type with enough chain for easy operation from the operating floor or walkway Gate valves 200 mm 8 inches and larger used on high pressure steam lines and elsewhere as indicated shall be provided with a globe valve bypass a Valves for 125 pound class steel piping shall conform to the following 1 Sizes 65 mm 2 1 2 inches and less bronze MSS SP 80 Type 1 or 2
164. ng floor to some point above the stoker where it shall connect to the boiler structural framing Front shall be cast iron or steel plate refractory lined with cleanout doors of refractory lined cast iron Structural framing as required shall support the stoker and its components from the boiler foundation or boiler room floor At the end of the grate the ash shall be discharged into a bunker or pit as indicated The bunker shall have a dust tight enclosure made of steel plates not less than 15 9 mm 5 8 inch thick properly protected with firebrick where exposed to the furnace shall be fitted with cast iron refractory lined inspection and access doors and shall have provisions for ash removal 4 4 Vibrating Grate Stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Any paragraphs describing stoker equipment not necessary for the system specified will be deleted kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Vibrating grate stokers shall be the grate level feed forced draft type with the vibrating action of the grate used to feed the coal from the hopper through the furnace and discharge the ashes into the ash pit Stokers shall be complete with hopper feed gate grate drive mechanism and all necessary auxiliary equipment Coal shall be automatically fed from the hopper onto the grate and shall be evenly distributed across the
165. ng loads encountered 1 Where steel slides do not require provisions for restraint of lateral movement an alternate guide method may be used On piping 100 mm 4 inches and larger a Type 39 saddle may be welded to the pipe and freely rest on a steel plate On piping under 100 mm 4 inches a Type 40 protection shield may be attached to the pipe or insulation and freely rest on a steel slide plate 2 Where there are high system temperatures and welding to piping is not desirable then the Type 35 guide shall include a pipe cradle welded to the guide structure and strapped securely to the pipe The pipe shall be separated from the slide material by at least 100 mm 4 inches or by an amount adequate for the insulation whichever is greater k Pipe hangers on horizontal insulated pipes except for Type 3 shall be the size of the outside diameter of the insulation l Piping in trenches shall be supported as indicated SECTION 23 70 01 00 10 Page 81 S113 Test of Water Treatment Equipment Test of water treatment equipment shall meet the requirements specified as to capacity and quality of effluent Tests for ion exchange units shall cover at least two complete regenerations and capacity runs 3 13 6 Test for Steam Purity and Water Level Stability Test for steam purity in accordance with ASTM D1066 and water level Stability shall be simultaneous under the operating conditions specified S
166. ng the boiler tests are contained in ASME PTC 19 11 3 13 3 Test of Fuel Burning Equipment Test of fuel burning equipment shall demonstrate that equipment installed will meet the requirements of the specifications Oil burners shall meet the test requirements of UL 296 The accuracy range and smoothness of operation of the combustion controls shall be demonstrated by varying the demand throughout the entire firing range required by the turndown ratio specified for the burner and stoker and in the case of automatic sequenced burners by further varying the firing rate to require on off cycling The control accuracy shall be as specified The specified turndown ratio shall be verified by firing at the minimum firing rate The operation of the flame safeguard control shall be verified by simulated flame and ignition failures 3 13 4 Test of Deaerating Feedwater Heater Test of deaerating feedwater heater shall demonstrate that the equipment installed shall meet the requirements specified as to performance capacity and quality of effluent During the operating test of the boilers tests shall be conducted to determine oxygen content in accordance with ASTM D888 Method A Boilers shall be operated at varying loads up to maximum heater capacity while oxygen tests are being made n ECTION 23 70 01 00 10 Page 115 S113 Test of Water Treatment Equipment Test of water treatm
167. ngs and inspection openings with cover plates shall be provided as indicated and required Silo frames shall be constructed of heavy channel frames the full size of the silo opening and shall be provided with concealed steam pipe and coil around opening Outlet hoppers shall be provided with rack and pinion type gates and shall be lined with austenitic stainless steel mm inches thick conforming to ASTM A167 Type 304L Rack and pinion gates shall be of the type specified for track hoppers 30 812 Car Spotter Car spotter shall be electric motor driven having a capstan mounted vertically on a rigid housing that completely encloses the gears The gears shall include helical gears and worm gear the helical gears shall be fabricated of high grade steel accurately finished and splash lubricated and the worm gear shall be fabricated of bronze All of the mechanism shall be mounted on a steel base rigidly welded to maintain alignment The unit shall be coupled to and driven by a separate W hp totally enclosed nonventilated hoist type motor with a full load speed of 1720 rpm The coupling shall be roller chain flexible typ nclosed in a revolving casing and protected by a heavy steel guard The unit shall have a starting pull of 22 kN 5000 pounds a running pull of 11 kN 2500 pounds and an average rope speed not in excess of 230 mm sec 45 fpm The unit sha
168. ngth to the pump for static and dynamic loading from the piping system The bases shall be pitched to a low point drain The complete pump and motor assembly shall be shop aligned using shims on both the pump and the motor 56 13 Couplings All pumps shall be furnished with nonlubricated flexible disc couplings and a coupling guard furnished to OSHA requirements Couplings shall be spacer type to permit removal of the mechanical seals and limited end float type for pumps with sleeve bearings 2 6s 144 Automatic Recirculation kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE If automatic recirculation valve is utilized delete this paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk All pumps shall be furnished with a self contained automatic recirculation control valve that shall be sized for nominally 25 percent of the pump s BEP flow aker TS Turbines Steam turbines for boiler feed pump shall operate the pump properly in a steam pressure range of Pa psig with steam backpressure of Pa psig Turbines shall have horizontally split two piece centerlin supported casings water cooled bearing cases with ring oiled SECTION 23 70 01 00 10 Page 63 babitt lined bronze packed sleeve bearings Turbines shall also be equipped with a mechanical shaft speed governor and valve independent overspeed emergency governor
169. nment Submittals with an S are for inclusion in the Sustainability Notebook in conformance to Section 01 33 29 SUSTAINABILITY REPORTING Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES SD 02 Shop Drawings Steam Generating Units G Equipment Erection G SD 03 Product Data Steam Generating Units Spare Parts Framed Instructions Welding SD 06 Test Reports Tests SD 10 Operation and Maintenance Data Steam Generating Units G T3 QUALITY ASSURANCI GI 1320 Welding kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Where pipeline structural or other welding is required on the same project tests will be required accordingly Testing may be by the coupon method as prescribed in the welding code or by special radiographic methods If the need exists wn ECTION 23 70 01 00 10 Page 16 for more stringent requirements for weldments delete the first bracketed statement and delete the welding submittal kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Submit a copy of qualified procedures and a list of names and identification symbols of qualified welders and welding operators and a proposed performance test procedure 30 days prior to the proposed test date containing a complete description of the proposed test along with calibration curves or test results furnished by an indep
170. not require provisions for restraint of lateral movement an alternate guide method may be used On piping 100 mm 4 inches and larger a Type 39 saddle may be welded to the pipe and freely rest on a steel plate On piping under 100 mm 4 inches a Type 40 protection shield may be attached to the pipe or insulation and freely rest on a steel slide plate 2 Where there are high system temperatures and welding to piping is not desirable then the Type 35 guide shall include a pipe cradle welded to the guide structure and strapped securely to the pipe The pipe shall be separated from the slide material by at least 100 mm 4 inches or by an amount adequate for the insulation whichever is greater k Pipe hangers on horizontal insulated pipes except for Type 3 shall be the size of the outside diameter of the insulation l Piping in trenches shall be supported as indicated SECTION 23 70 01 00 10 Page 81 NOTE Continuous blowdown equipment will be provided if required by UFC 3 410 01 or UFC 3 410 02 If a firetube boiler is specified these paragraphs will be deleted Blowdown system will be deleted if not required for the project kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Package type blowdown system shall be rated as indicated The system shall automatically proportion blowdown to amount of makeup The unit shall includ the heat exchanger s flow control valve strainer sam
171. nsulation shall be sealed as indicated Pipes up to and including 250 mm 10 inches in diameter passing through roof or floor waterproofing membrane may be installed through a galvanized steel sleeve with caulking recess anchor lugs flashing clamp device and pressure ring with brass bolts Waterproofing membrane shall be clamped into place and sealant shall be placed in the caulking recess In lieu of a waterproofing clamping flange and caulking and sealing of annular space between pipe and sleeve or conduit and sleeve a modular mechanical type sealing assembly may be installed The seals shall consist of interlocking synthetic rubber links shaped to continuously fill the annular space between the pipe conduit and sleeve with corrosion protected carbon steel bolts nuts and pressure plates The links shall be loosely assembled with bolts to form a continuous rubber belt around the pipe with a pressure plate under each bolt head and each nut After the seal assembly is properly positioned in the sleeve tightening of the bolts shall cause the rubber sealing elements to expand and provide a water tight seal between the pipe conduit and the sleeve Each seal assembly shall be sized as recommended by the manufacturer to fit the pipe conduit and sleeve involved The Contractor electing to use the modular mechanical type seals shall provide sleeves of the proper diameters
172. nt of Sound Pressure Levels in Air ASA 118 AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL AMCA AMCA 801 2001 R 2008 Industrial Process Power Generation Fans Specification Guidelines AMERICAN BEARING MANUFACTURERS ASSOCIATION ABMA ABMA 11 2014 Load Ratings and Fatigue Life for Roller Bearings ABMA 9 2015 Load Ratings and Fatigue Life for Ball Bearings AMERICAN BOILER MANUFACTURERS ASSOCIATION ABMA BOIL ABMA Boiler 203 2002 A Guide to Clean and Efficient Operation of Coal Stoker Fired Boilers ABMA Boiler 402 2005 Boiler Water Quality Requirements and Associated Steam Quality for Industrial Commercial and Institutional Boilers AMERICAN GAS ASSOCIATION AGA AGA XR0603 2006 8th Ed AGA Plastic Pipe Manual for Gas Service T AMERICAN GEAR MANUFACTURERS ASSOCIATION AGMA ANSI AGMA 6013 2006A R 2011 Standard for Industrial Enclosed Gear Drives ANSI AGMA 6113 2006A R 2011 Standard for Industrial T Enclosed Gear Drives Metric Edition T AMERICAN NATIONAL STANDARDS INSTITUTE ANSI ANSI Z83 19 CSA 2 35 2009 Addenda A 2011 R 2014 Gas Fired High Intensity Infrared Heaters n ECTION 23 70 01 00 10 Page 9 API S API S AREMA AWWA AWWA AWWA ASME ASME ASME ASME ASME ASME ASME AMERICAN PETROLI pec 15LR td 610 AM Eng Man ERICAN RAILWAY ARE
173. ntroller The weigh feeders shall meet or exceed the requirements of NIST HB 44 Southern Eastern Western Weighing and Inspection Bureau They shall have an accuracy of 1 2 of 1 percent of flow rates over their total variable rated capacity The feeder shall be provided with a flexible boot for connecting the gate to the feeder inlet chute which in turn shall be flared to produce a feed opening tapering from wide to wide with the direction of flow of material The belts for feeders shall meet RMA IP 1 requirements conforming to the Conveyor and Elevator Belt Handbook fire resistant type conforming to the standards of Part 18 65 of the 30 CFR 1 Top belt cover thickness shall be 6 4 mm 1 4 inch with bottom cover 3 2 mm 1 8 inch thick Belt edges shall have minimum 25 mm 1 inch flanges and shall be sealed by carrying the cover around the carcass edges during manufacture Cover and skim coat material shall be comparable to those meeting the requirements of the RMA IP 1 for impact and abrasion resistance The weight sensor shall be a heavy duty industrial electronic force transducer flexure mounted to the force collection system Each sensor shall have a remote indicating meter and a six digit totalizing counter located installed and connected in the boiler control panel Unit frame shall provide rigid support for the material load belt and idlers The unit shall be shop assembled complete with drive and all appurtenances and shall be
174. o Section 01 33 29 SUSTAINABILITY REPORTING Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES SD 02 Shop Drawings Steam Generating Units G Equipment Erection G SD 03 Product Data Steam Generating Units Spare Parts Framed Instructions Welding SD 06 Test Reports Tests SD 10 Operation and Maintenance Data Steam Generating Units G T3 QUALITY ASSURANCI GI 1320 Welding kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Where pipeline structural or other welding is required on the same project tests will be required accordingly Testing may be by the coupon method as prescribed in the welding code or by special radiographic methods If the need exists wn ECTION 23 70 01 00 10 Page 16 for more stringent requirements for weldments delete the first bracketed statement and delete the welding submittal kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Submit a copy of qualified procedures and a list of names and identification symbols of qualified welders and welding operators and a proposed performance test procedure 30 days prior to the proposed test date containing a complete description of the proposed test along with calibration curves or test results furnished by an independent testing laboratory of each instrument meter gauge and thermometer to be used in the tests
175. o each trap shall be provided with a brass or stainless steel strainer either separately or as an integral part of the trap 2324 PRESSURE GAUGES Pressure gauges shall be heavy duty industrial type with phenolic case solid front rear blowout threaded ring shatterproof glass and 13 mm 1 2 inch NPT bottom connection suitable for specified pressure or vacuum with minimum 114 3 mm 4 1 2 inch diameter dial except as other wise specified Pressure gauges shall be installed on the low pressure side of each pressure reducing valve on the suction and discharge side of each pump on inlets and outlets of heat exchangers on the feedwater heater and where shown or required for proper operation Pressure gauge shall be installed on each boiler and shall have a 254 0 mm 10 inch dial 304 8 mm 12 inch dial face Gauges shall be installed so as to be accessible and easily read from the operating floor Gauges shall be equipped with integral or separate siphons and pulsation dampeners and shall be connected by brass pipe and fittings with shutoff cocks Where pressure reducing valves are used upstream and downstream gauges shall be placed close to the pressure reducing assembly but connected approximately 3 m 10 feet therefrom The operating ranges of the gauges shall be approximately twice the normal operating pressure Zee THERMOMETERS Thermometers shall be bimetallic typ
176. o the grate surface Dampers shall be arranged for operation from the front plate of the boiler Air distribution shall be such that the air pressure is greatest where the fuel bed is the thickest Air quantity shall vary in direct proportion with coal feed rate and shall be controlled automatically 24522161 Grate Surface Grate surface shall include the underfeed retort area air admitting tuyeres side combustion grates and the side dumping plates Retorts shall be sectional construction of large capacity and proper shape to distribute coal uniformly over th ntire grate surface with a minimum of moving parts within the furnace Stokers having total grate width of more than 2 1 m 7 feet shall have movable grates providing positive lateral feeding of the coal from the retort toward the dump plates Retort and grate sections shall be constructed of heavy duty heat resisting cast iron shall be cored for proper air distribution and shall be designed for asy replacement of individual sections Ash dump plates shall be provided with necessary levers and linkage for hand operation from the front of the boiler 2452 1 2 Ram Feed Ram feed shall be mechanical steam pneumatic or hydraulic driven by an electric motor connected through an efficient gear reduction unit crankshaft and connecting rod Motors shall be totally enclosed fan cooled type for installation in a Class II Division
177. of the boiler drums shall be insulated with 75 mm 3 inches of suitable mineral wool blanket or block insulation Manholes and other inspection and access openings identification plates and stamps shall have insulation finished neatly against a metal ring provided for this purpose Re OaS AA Bridge Walls Bridge walls exposed on all sides to radiant heat and to the products of combustion shall be constructed of super duty refractory not less than 450 mm 18 inches thick conforming to the boiler manufacturer s requirements walls having only the front side exposed to radiant heat and to the products of combustion shall have front facing and cap constructed of 225 mm 9 inches of super duty refractory and a back facing of not less than 225 mm 9 inches of low duty firebrick Base of the wall shall be common brick AE S E NG Settling Chamber Settling chamber equipped with suitable means for frequent cleaning without shutting down the boilers shall be provided below the last pass of each boiler for the removal of fly ash ETO TA Expansion Joints Expansion joints shall be provided where indicated and else where as required to permit all brickwork to expand freely without interference with the boiler Joints shall be of adequate width tightly sealed against leakage and free from mortar with the outer 100 mm 4 inches sealed with resilient mineral wool suitable for 930 to 10
178. ol Valve kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE If automatic recirculation valve is not utilized delete this paragraph kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Valve shall be the self contained self powered type The unit shall automatically program the recirculation flow when required and assume all functions for prevention of the backflow of the main feedwater flow for detection of low flow for cycling of the control valve and for the pressure reduction for liquid delivery to the low pressure feedwater heater The valve assembly shall be flanged type with flanged spools provided in both the main line and recirculation line for ease of disassembly E E Exhaust Heads Exhaust heads for the discharge of steam to atmosphere shall be one piece plate steel semisteel or cast iron construction with internal baffle arrangement for the removal of entrained condensate and oil and with provision for drain connection Flow area through unit shall be larger than connecting pipe 2T Strainers The strainer body connections shall be of the same size as the pipelines in which the connections are installed The strainer bodies shall be heavy and durable cast steel or gray cast iron The bodies shall have arrows clearly cast on the sides to indicate the direction of flow Each strainer shall be equipped with an easily removable cover and
179. ompatible primer before application of tape The primer shall be as recommended by the tape manufacturer and approved by the applicator of the extruded polyethylene coating Damaged areas of extruded polyethylene coating shall be repaired by tape wrapping as described under the tape wrapping system except that any residual material from the extruded polyethylene coating shall be pressed into the break or shall be trimmed off All areas to be taped shall be primed and the tape shall be applied half lapped 16334 3 Tape Wrap Pipe Coating Cleaned surfaces shall be primed before applying tape as recommended by the manufacturer of the tape The tape shall be an approved pressure sensitive organic plastic tape with a minimum nominal thickness of 0 51 mm 0 020 inch The tape shall conform to ASTM G21 for fungus resistance Tape shall be applied to clean dry grease free and dust free surfaces only Weld beads shall be wire brushed All burrs and weld spatter shall be removed Weld beads shall be covered with one wrap of tape before spiral wrapping At each end of straight runs a double wrap of one full width of tape shall be applied at right angles to the axis of the spiral wrapping Kraft paper protective wrapping if any shall be removed from the pipe before the tape is applied Material which is wrapped before it is placed in its final position shall have the wrapping protect
180. ons for expansion expansion joints will be installed kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Guided slip tube expansion joints shall conform to EJMA Stds and ASME B31 1 End connections shall be flanged Anchor bases or support bases shall be provided as indicated or required The joints shall be designed for a steam working pressure not less than Pa psig Joints shall provide for either single or double slip of the connected pipes as indicated and for not less than the traverse indicated Service outlets shall be provided where indicated or required sA oar A Bellows Type Expansion Joints Bellows type joints shall be flexible guided expansion joints conforming to EJMA Stds and ASME B31 1 The expansion element shall be stainless steel Guiding of piping on both sides of expansion joint shall be in accordance with the published recommendations of the manufacturer of the expansion joint The joints shall be designed for the working temperature and pressure suitable for the application but design pressure shall not be SECTION 23 70 01 00 10 Page 76 less than 1 03 MPa 150 psig 212623 Flexible Ball Type Expansion Joints Flexible ball joints shall be stainless steel malleable iron ductile iron carbon steel bronze or other alloys as appropriate for the service intended The joints may be threaded flanged or welded end as required and shall be capable
181. op Sequences The operator shall start and stop the mill in three steps ignitor pulverizer feeder following fixed sequences The system shall be capable of transferring between the startup and shutdown sequences at any time Each mill shall be monitored and should any unsafe conditions occur that mill shall be tripped A mill first out indication shall be provided to indicate the initiating cause of trip The first out indication shall be deleted only upon reset of the mill trip relay Startup and shutdown sequence indications shall be provided to allow the operator to follow the progress of the mill startup or shutdown sequences These indications shall show the next step to be performed as well as the progress through the sequences 2 8 5 3 4 Ignitor Control An ignitor group consists of the ignitors associated with a pulverizer burner group Ignitors associated with a burner group shall be controlled from a separate electropneumatic ignitor control package Sequential starting of ignitors between burner groups shall be provided The ignitors associated with a burner group shall be started and stopped from the insert panel and local push buttons An ignitor fuel trip IFT first out indication shall be provided to indicate the initiating cause of the IFT This indication shall be extinguished only when the IFT relay is reset 28292329 Fuel Safety Subsystem The fuel safety subsystem comprises the MFT system IFT
182. operly installed and is in proper operating condition upon completion of the installation The action settings for all automatic controls in the form of a typed tabulated list indicating the type of control location setting and function alo Hydrostatic Tests Following erection each boiler shall be tested hydrostatically and proved tight under a gauge pressure of 1 1 2 times the working pressure specified Following the installation of piping and boiler house equipment but before the application of any insulation hydrostatic tests shall be made and the system proved tight under gauge pressures of 1 1 2 times the specified working pressure The boilers shall be tested and the piping connections inspected by a NBBI commissioned boiler inspector for determining compliance with all requirements in ASME BPVC SEC VIII D1 and the Contracting Officer shall be supplied with a certificate of approval for each boiler After flushing and operationally testing underground portions of oil containing piping systems shall be leak tested The test shall be the standpipe method buoyancy device type and shall conform to the requirements in NFPA 329 The test method shall not involve pressurization of the system in any way which could increase the rate of product escape through an established leak sl 32 Efficiency and Operating Tests Upon completion of installation the boiler plant shall be subjected to operating te
183. otally totally 1 Group F hazardous location in accordance with NFPA 70 shall be manual magnetic across the lin type with general purpos weather resistant water tight explosion proof enclosure A platform shall the motor for servicing the motor and equipment mounted in the hood Access to the platform shall be by an approved type of safety ladder From either run section at operating lectric motor installed ina Division Motor starter reduced voltage start dust tight be installed adjacent to Controls for the operation of the elevator shall be located as indicated enclosures shall be provided Dust control covers and inlet and discharge for each conveyor 3035 Vibrating Conveyor Vibrating conveyor shall be th lectric motor driven mechanical vibrating type with a capacity of metric tons hour tons hour when handling coal weighing approximately 800 kg cubic meter 50 pcf and with maximum lump size of mm inches in diameter Conveyor shall have a conveying length as shown The conveyor trough shall be fabricated of mm gauge steel mm inches in width and mm inches deep and provided with dust tight cover Conveyor pans of 9 5 mm 3 8 inch thick Type 304L solid stainless steel plate shall be provided The trough shall be mounted on vibrator bars torsion bars or coil springs attached to yoker legs of rigid cross brace construction and fabricate
184. ousing Idler assemblies for both troughs shall include heavy uty spherical roller type bearings with external lubrication fittings he chain drive assembly shall include cast iron wheels with removable urface hardened toothed segments drive shaft bearings The conveyor shall be driven by a hydrostatic drive unit coupled with a low speed high torque hydraulic motor built in torque limiting valves for preventing damage to load train or electric motor Speed regulation self lubrication internal cooling and dynamic braking shall be provided with this drive Inching capability shall be provided Hinged inspection doors windows and removable panels shall be provided along the conveyor to permit access and observation at critical points All inspection doors windows and removable panels in mild steel shall be provided with stainless steel hardware and must be made completely water tight Water cooling and drainage connections shall be provided through flanged connections to the conveyor trough Provision shall be made for continuous water flow into the top trough of the conveyor including two overflow connections one for normal level and one high level including high level alarm and an overflow weir box to prevent drain clogging Chain cleaning spray shall also be provided SECTION 23 70 01 00 10 Page 99 2 73124 Dense Phase Ash Handling The ash conveying system shall be pneuma
185. owing the complete layout of the entire system where directed Condensed operating instructions explaining preventive maintenance procedures methods of checking the system for normal safe operation and procedures for safely starting and stopping the system shall be prepared in typed form framed as specified above for the wiring and control diagrams and posted beside the diagrams The framed instructions shall be posted before acceptance testing of the systems 13 TESTS kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE Before occupancy of a facility the boilers shall be inspected in accordance with the Code of Boiler and Pressure Vessel Inspectors BPVI and the American Society of Mechanical Engineers ASME Inspectors must be certified in accordance with BPVI standards References to inapplicable types of boilers will be deleted kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Submit test reports in booklet form showing all field tests performed to adjust each component and all field tests performed to prove compliance with the specified performance criteria upon completion and testing of the installed system Each test report shall indicate the final position of n ECTION 23 70 01 00 10 Page 113 controls Submit a written statement from the manufacturer s representative certifying that combustion control equipment has been pr
186. pansion expansion joints will be installed and blanks will be filled as appropriate kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Expansion joints shall provide for either single or double slip of the n ECTION 23 70 01 00 10 Page 105 Bis 3 3 3 3 connected pipes as required and indicated Initial setting shall be made in accordance with the manufacturer s recommendations to allow for ambient temperature at time of installation Pipe alignment guides shall be but in any case shall except in lines 100 mm 4 inches or smaller where guides shall be installed not more than 600 mm 2 installed as recommended by the joint manufacturer not be more than 1 5 m 5 feet from expansion joint feet from the joint 536 Valves Gate or globe valves shall be installed with stems horizontal or upright piping with the cap or Swing check valves shall be installed in horizontal bonnet up or in vertical piping with the flow upward Lift or piston check valves shall be installed in horizontal piping with the cap or bonnet up 6 BURIED PIPING INSTALLATION sOrd Protective Coating for Underground Steel Pipe All steel pipe installed underground shall be given a protective covering mechanically applied in a factory or field plant especially equipped for the purpose Specials and other fittings which cannot be coated and wrapped mechanically shall hav
187. pl le cooler if required solenoid valve and surge tank An extra heavy bl heat exchanger shall be provided 1 removable tube bundle shall be provided with U tubes having bends lowdown Tubes shall be of stainless steel A twice the thickness of the tubing A rear baffle shall support all tubes at the return bend A sample cooler shall be installed so that shell and tubing can be removed without disturbing piping or mounting Continuous valve shall be the manual proportioning type fabricated of blowdown corrosion resistant steel The valve shall be equipped with a micrometer dial and pointer to indicate the proportional setting Pais al lo Continuous Emissions Monitoring kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE A continuous emissions monitoring system CEMS is required by the Clean Air Act Amendment CAAA of 1990 if the fuel utilized is oil or coal and the heat input is 3 megawatts 10 million BTU HR or greater A CEMS may also be required by state or local laws If a CEMS is necessary the designer shall review the CAAA and the relevant state or local law early in the project to allow time to incorporate the required CEMS specification and to determine which flue gas emissions will be included in the required reports Before acceptance of the installation the Contracting Officer shall be furnished a written test report which provides docum
188. ponents from the boiler foundation or boiler room floor Water spray pipes and nozzles shall be provided for quenching the ashes in the ash pit 2 4 2 2 Single Retort Screw Type Stokers Single retort heavy duty screw feed stokers shall be equipped with rectangular firepot side dump grates forced draft fan electric motor drive and all necessary auxiliary equipment Coal shall be fed from the hopper into the retort with a spiral worm conveyor designed to feed a constant amount of coal and to prevent coal from packing in the worm Dampers shall be provided between ash pits and main air chamber under stoker to permit control of air distribution to the grate surface Dampers shall be arranged to be operated manually from the front plate of the boiler The stoker shall be provided with an integral forced draft fan driven by the stoker motor Air quantity shall vary in direct proportion with the coal feed rate and shall be controlled automatically Retorts and grates shall be constructed of heavy duty heat resisting cast iron shall be cored for proper air distribution and shall be designed for easy replacement of individual sections Retorts shall be of proper size and shape to distribute coal uniformly over th ntire grate surface Stationary grates shall be provided on all sides of the retort as required to suit the firebox Ash dump grates shall be provided on each side of the retort complete with necessary levers and l
189. pressure vessel skid Capacity of the unit shall be approximately metric tons hour tons hour of ash weighing approximately kg cubic meter pcf Piping sizes for ash collection system shall be designed to fit the unit supplied The vacuum pressure system shall be used where storage silo is more than 150 m 500 feet from the boiler plant A vacuum system should be used for capacities of less than 45 metric tons hour 50 tons hour per system SECTION 23 70 01 00 10 Page 94 Zin Sly We eS Pump Unit kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Where characteristics of the fly ash require additional treatment a water spray shall be incorporated in the filtering unit If not required delete the portion included in the brackets Air discharged to the atmosphere must meet the local air pollution standards kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Vacuum or vacuum pressure pump unit shall be sized to match system design requirements Pump unit shall be liquid ring type having round rotor with curved blades rotating in an elliptical casing Water alternately entering and leaving the chambers within the rotor vanes shall provide the required pumping action Water within the casing shall act as an air cleansing agent and the operation and maintenance of the unit shall not be affected by dust laden air Unit shal
190. quired by federal state and local regulations SO2 reporting shall be based on analyzer measurement fuel flow and percent sulfur calculation daily heat input calculation Nitrous oxides carbon dioxide and particulate matter reporting shall be based on analyzers c The CEMS equipment shall include the central processing unit printer hard disk drive and floppy disk drive The floppy disk drive shall function as a recorder The manufacturer shall provide the software to generate the required reports in a format acceptable to the federal state and local regulatory agencies The operator interface to the CEMS equipment shall be via CRT screen 2 10 WASTE HEAT RECOVERY EQUIPMENT kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Economizer or preheater will be selected to be compatible with pollution control equipment being utilized kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Each boiler shall be equipped with an economizer an air preheater Units may be separate from or integral with the boiler and shall be complete with insulation and jackets casings supports and access doors and shall have provision for tube or tube bundle removal and for cleaning Soot blowers shall be provided as specified in paragraph BOILERS 2210151 Economizers Economizers shall be of a type normally provided by the
191. quired for system startup operation and shutdown The instructions shall include the manufacturer s name model number service manual parts list and brief description of all equipment and their basic operating features Submit SECTION 23 70 01 00 10 Page 21 Codes for Army projects using the Resident Management System RMS are AE for Architect Engineer DO for District Office Engineering Division or other organization in the District Office AO for Area Office RO for Resident Office and PO for Project Office Codes following the G typically are not used for Navy Air Force and NASA projects An S following a submittal item indicates that the submittal is required for the Sustainability Notebook to fulfill federally mandated sustainable requirements in accordance with Section 01 33 29 SUSTAINABILITY REPORTING Choose the first bracketed item for Navy Air Force and NASA projects or choose the second bracketed item for Army projects kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Government approval is required for submittals with a G designation submittals not having a G designation are for Contractor Quality Control approval information only When used a designation following the G designation identifies the office that will review the submittal for the Government Submittals with an S are for inclusion in the Sustainability Notebook in conformance t
192. r manufacturer 2 624 245 Water Test Kit A kit complete with test containers reagents and instructions for testing the raw and effluent water shall be provided in a strong carrying case 2 24 2 6 Treated Water Storage Tank Treated water storage tank shall be fabricated from steel plates not less than 4 7625 mm 0 1875 inch thick for shell and heads and shall be constructed in accordance with ASME BPVC SEC VIII D1 for unfired pressure vessels for a design working pressure of 517 kPa 75 psig Heads shall be dished concave to pressure to a radius equal to the diameter of the tank The tank shall be provided with the connections indicated an 203 2 mm 8 inch copper ball float level operated control valve valve bypass and accessories and a protected gauge glass The tank shall be the diameter shown and shall have a capacity of not less than liters gallons The tank shall be hydrostatically tested at the factory at not less than 690 kPa 100 psig Zero BUILDING HEATING EQUIPMENT 2 25 1 Unit Heaters Da2 a ee bers General The manufacturer of the unit heaters shall not select individual heaters with a capacity in excess of 125 percent of the value specified for the heater Orifice plates shall be provided to reduce the joule Btu output where required The noise level of each unit heater shall be appropriate for the space in which the heater is installed The sound power level decibels ref
193. r phase unless otherwise indicated Ratings shall be adequate for the duty imposed but shall not be less than indicated 22 2 2 Motor Starters kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Where motor starters for mechanical equipment are provided in motor control centers delete the reference to motor starters kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Where a motor starter is not shown in a motor control center on the electrical drawings a motor starter shall be provided Where required motor starters shall be provided complete with properly sized thermal overload protection and other equipment at the specified capacity SECTION 23 70 01 00 10 Page 19 paragraphs will be deleted kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Continuous blowdown valve shall be manual proportioning type fabricated of corrosion resistant steel The valve shall be equipped with a micrometer dial and pointer to indicate the proportional setting 3 4 8 Safety Valves Safety valves of proper size and of the required number and construction and set pressures shall be in accordance with of the ASME BPVC SEC I and shall be installed so that the exhaust steam will discharge through pipes extending through the roof Each exhaust riser shall have a drip pan elbow to prevent the accumulation of water on the valve A suitable slip joint shall be prov
194. r shall be of the trough type as shown Maximum incline of the belt conveyor shall not exceed 15 degrees The conveyor support frame shall have sufficient rigidity to maintain belt alignment at least 75 mm 3 inches clearance to prevent damage to the edge of the belt on its return run and adjustments for aligning shafts Decking to protect the return belt from coal sifting and to provide lateral stiffness shall be placed on top of the stringers Idlers shall be accurately made to provide a rigid framework that will maintain permanent alignment of well balanced smooth running easy turning idler rolls All idlers and return rolls shall be CEMA Belt Book Series C5 Pressure lubrication shall be provided to ball or roller bearings Idlers shall be 20 degree or 35 degree three roll type spaced on 1 2 m 4 foot centers except under loading points and skirts Return idlers shall be spaced on 3 m 10 foot centers The belting shall be Grade 2 as defined in RMA IP 1 The belting shall have field vulcanized splices Pulleys shall be designed in accordance with CEMA B105 1 shall be heavy welded steel true to diameter and accurately bored key seated and tightly fitted to the shafts Pulley face width for belts 1067 mm 42 inches wide and smaller that are 150 m 500 feet or more in length shall be belt width plus 100 mm 4 inches less than 150 m 500 feet in length shall be belt width plus 75 mm 3 inches Pulley face width for belts 1 2 m 48 inches and larger sh
195. rating temperatures encountered under all operating conditions The collectors shall be designed to resist erosion and minimize plugging shall be gas tight and shall have a collection efficiency of 85 to 95 percent on particles greater than 20 microns aerodynamic diameter depending upon the recycle rate selected by the manufacturer No refractory lining will be acceptable in the mechanical dust collector The collection hopper shall have a valley angle of at least 60 degrees below the horizontal The line carrying recycle solids back to the bed shall be fabricated of carbon steel with an allowance for wear and be installed at an angle of no less than 60 degrees below the horizontal The solids collection hopper and dipleg shall be provided with pressure differential measurement to indicate pluggage The design shall include provisions for sampling of recycle solids hopper contents The hopper shall be fabricated of material capable of enduring the conditions imposed by a flue gas atmosphere Provision for continuous disposal of ash from the recycle hoppers shall be provided eal IGNITION OIL SYSTEM kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Wherever light oil is required as a support and or ignition fuel a complete ignition oil system must be provided The system should include two full size rail truck unloading pumps capable of unloading a rail shipment i
196. red burner or burners The burner assembly and control systems shall conform to UL 296 UL 726 and NFPA 85 except as otherwise specified Supervised manual semiautomatic and fully automatic combustion safety controls shall conform to NFPA 85 and ASME CSD 1 hed Aboveground Oil Storage Tanks Aboveground oil storage tanks and associated piping systems shall be in accordance with Section 33 56 10 FACTORY FABRICATED FUEL STORAGE TANKS SECTION 23 70 01 00 10 Page 46 2 4 2 Underfeed Stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Any paragraphs describing stoker equipment not necessary for the system specified will be deleted kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk 4 2 1 Single Retort Heavy Duty Ram Type Stokers Single retort heavy duty ram type stokers shall be equipped with stationary or moving grates and side dump plates and shall be provided with steam electric motor drive and all necessary auxiliary equipment Dumping power cylinders shall be compressed air actuated Coal shall be fed from the hopper into the retort by means of a ram and shall be evenly distributed along the full length of the retort with auxiliary pusher blocks on a pusher rod located at the bottom of the retort and actuated by the coal ram Dampers shall be provided between ash pits and main air chamber under stoker to permit control of air distribution t
197. rently with the operating tests or separately at the option of the Contractor Efficiency shall be not less than specified Maximum moisture content of saturated steam leaving the boiler shall be as specified c The efficiency and general performance tests on the boilers shall be conducted by a qualified test engineer and observed by the Contracting Officer All testing apparatus shall be set up calibrated tested and ready for testing the boiler before the arrival of the Contracting Officer d Calibration curves or test results furnished by an independent testing laboratory of each instrument meter gauge and thermometer to be used in efficiency and capacity tests shall be furnished before the test A test report including logs heat balance calculations and tabulated results together with conclusions shall be delivered in quadruplicate An analysis of the fuel being burned on the test shall be submitted to the Contracting Officer e The analysis shall include all pertinent data tabulated in the ASME PTC 4 abbreviated efficiency test Necessary temporary test piping not less than 100 mm 4 inches in diameter and steam silencer to exhaust excess steam to atmosphere in th vent the boiler load is insufficient to meet the capacity specified shall be provided Control valve for exhausting excess steam to atmosphere shall be provided in a convenient location inside the boiler room Instruments required for conducti
198. required shall be provided Motor shall be totally enclosed nonventilated totally enclosed fan cooled totally enclosed fan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in accordance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with weather resistant dust tight explosion proof enclosure 309 Vibrator Vibrator shall be electromagnetic type with variable power control that SECTION 23 70 01 00 10 Page 87 produces mechanical pulsating motion The net weight of the vibrator shall be kg pounds and power input shall be watts amperes at volts ac Vibrator shall provide 3600 vibrations per minute or 7200 vibrations for heavy duty applications The vibrator shall be semi noiseless and shall be provided with mounting plates for welding to hoppers as indicated each complete with an eye bolt for attaching a safety chain The electric control suitable for separate wall mounting shall be complete with an electronic valve for changing alternating current to mechanical pulsating waves and a dial switch or rheostat to vary the power of vibration Vibrators shall be provided with Division I Class II Group F rating in the areas where coal dust is present in accordance with NFPA 70 730 510 Car Heaters kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
199. res mounted with reflectors providing suitable shielding to illuminate controls instruments gauges and meters Field piping connections shall terminate in one bulkhead mounted manifold located to conform with the installation requirements of the system Field electrical wiring shall terminate in a color coded terminal strip so located as to conform with the installation requirements of the system Electrical tubing or piping connections to controls instruments or other devices on the panel shall be inside the panel and not visible from the panel front A suitable plug in strip shall be provided in the rear of the panel for any required plug in electrical connections of the instruments Necessary transformers separate relays switches and fuses shall be installed in a fully enclosed junction box A fused safety switch shall serve the 120 volt power supply required for control circuits Ifa pneumatic control system is provided the panel shall include duplex air supply filter and regulator set mounted on the rear of the panel with properly identified pneumatic terminal blocks and low point drain No high pressure lines will be allowed to enter the panel If packaged boiler burner units with integral controls are furnished the control equipment may be mounted on a separate fr standing panel for each boiler Controllers and indicators specified or required shall be panel mounted and tested at the factory complete with relays transformers switches
200. rom coming in contact with the hot wall of the pipe The sleeves shall be arranged for attaching securely to the pipe but ina manner that will permit differential expansion ES ant Boilers and Firing Equipment Boilers and firing equipment shall be supported from the foundations with structural steel independent of all brickwork Boiler supports shall permit free expansion and contraction of each portion of the boiler without placing undue stress of any part of the boiler or setting MEIS Boiler Settings aoe Saad Boiler Material Materials shall conform to the following woe Oude Firebrick ASTM C27 class as recommended by the boiler manufacturer Pit seat ere aA Insulating Brick ASTM C155 13 23 1hs3 Castable Refractory ASTM C401 The minimum modulus of rupture for transverse strength shall not be less than 4 1 MPa 600 psi after being heat soaked for 5 hours or more at a temperature in excess of 1371 degrees C 2 500 degrees F ede Led Mortar Air Setting Refractory As recommended by the boiler manufacturer S355 Brick Common ASTM C62 oe Su 16 Galvanized Steel Sheets ASTM A659 A659M ASTM A653 A653M Gauges specified are manufacturer s standard gauge eet Uncoated Steel Sheets and Strips Low Carbon ASTM A36 A36M Gauges specified are manufacturer s standard gauge SECTION 23 70 01 00 10 Page 24 2 Be Se2 Firebox Packaged Type Boiler refractories and insulation shall be
201. rosion resistant materials suitable for the chemicals being pumped Volumetric accuracy of the pumps shall be within one percent over the range indicated Pump capacities shall be adjustable by positioning crank pin with micrometer setscrews Stroke length scale shall be divided in percentage graduations engraved on scale Cylinders shall be replaceable for increased or reduced pressure or capacity ranges Drive motors shall be suitable for the electrical power available and shall have drip proof enclosures Tanks shall be made of polypropylene and mounted on legs Tanks shall have filling and drain connections and gauge glass Each tank shall be furnished with one pump mounted and piped with black iron pipe and fittings with suction strainer and stainless steel screen and with 13 mm 1 2 inch relief valve with steel body and stainless steel trim Each tank shall have hinged cover Tank bottom shall be dished concave to a radius equal to the diameter of the tank Units shall be for phosphate or caustic feed and sulfite feeding Motor driven agitator shall be provided The pump shall be designed to feed the chemical solutions into the boiler feedwater system 24 2 Water Softening Equipment kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Need for softening equipment for makeup water will be as determined in accordance with UFC
202. rs to allow for differential settlement The interior of the pipe shall be thoroughly cleaned of all foreign matter before being lowered into the trench and shall be kept clean during installation The pipe shall not be laid in water or when the trench or weather conditions are unsuitable When work is not in progress open ends of pipe and fittings shall be securely closed so that water earth or other substances cannot enter the pipe or fittings Any pipe fittings or appurtenances found defective after installation shall be replaced Threaded joints shall be made with tapered threads and shall be made perfectly tight with joint compound applied to the male threads only This requirement shall not apply for the gauging hatch or similar connections directly over the tank where the line terminates in a fitting within a cast iron manhole designed to allow for differential setting Where steel piping is to be anchored the pipe shall be welded to the structural steel member of the anchor and the abraded area shall be patched with protective coating or covering as specified Piping passing through concrete or masonry construction shall be fitted with sleeves Each sleeve shall be of sufficient length to pass through the entire thickness of the associated structural member and shall be large enough to provide a minimum clear distance of 13 mm 1 2 inch between the pipe and sleeve except where otherwise indicated Sleeves through concrete may be 0 912 mm 20
203. s shall be filled with a solution consisting of the following proportional ingredients for every 3785 liters 1000 gallons of water and operated at approximately 207 to 350 kPa 30 to 50 psig for a period of 24 to 48 hours exhausting steam to the atmosphere 11 kg 24 pounds caustic soda 3 6 kg 8 pounds sodium nitrate 11 kg 24 pounds disodium phosphate 230 mg 1 2 pound approved wetting anhydrous agent Chemicals in the above proportions or as otherwise approved shall be thoroughly dissolved in the water before being placed in the boilers After the specified boiling period the boilers shall be allowed to cool and then drained and thoroughly flushed Piping shall be cleaned by operating the boilers for a period of approximately 48 hours wasting the condensate n ECTION 23 70 01 00 10 Page 110 S292 Boiler Water Conditioning Provide boiler water conditioning including chemical treatment and blowdown during periods of boiler operation to prevent scale and corrosion in boilers and in supply and return distribution systems from the initial startup of the system through the testing period and to final acceptance of the completed work but for at least 30 days of operation Approved chemicals and method of treatment shall be used TABLE I PIPE Service Pressure kPa Ma
204. s before the date of beneficial occupancy Include in the data a complete list of spare parts and supplies with current unit prices and source of supply and a list of the parts recommended by the manufacturer to be replaced after 1 and 3 years of service PART 2 PRODUCTS 2 2 1 MATERIALS AND EQUIPMENT Pet Standard Products Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture of the products and that essentially duplicate items that have been in satisfactory use for at least 2 years prior to bid opening Equipment shall be supported by a service organization that is in the opinion of the Contracting Officer reasonably convenient to the site vis 2 Nameplates Each major item of equipment shall have the manufacturer s name address type or style model or serial number and catalog number on a plate secured to the item of equipment Pl eee Prevention of Rust Unless otherwise specified surfaces of ferrous metal subject to corrosion shall be factory prime painted with a rust inhibiting coating and subsequently factory finish painted in accordance with the manufacturer s standard practice Equipment exposed to high temperature when in service shall be prime and finish painted with the manufacturer s standard heat resistant paint to a minimum thickness of 0 025 mm 1 mil 1 4 Equipment Guards and Ac
205. s deep Dust control covers of 3 416 mm No hick steel shall be provided for each unit Two Four r poke holes one two each side shall be provided with 6 4 mm hick No 304 stainless steel sliding covers All feeder parts contact with coal shall be made of or lined with Type 304 steel All feeders shall automatically compensate for material and weight effect to maintain a constant feed and must not damper out when operating under full silos or bins Slopes on pan shall not exceed 10 mounted an provided w above be nonventila installati degrees he vibratory feeders shall be foot suspension d shall be completed with supports Suspended feeders shall be ith safety cables The feeders shall have their drives located low trough The motors shall be totally enclosed ted type totally enclosed fan cooled type suitable for on in Class II Division I Group F hazardous location in accordance efficiency with NFPA 70 Integral size motors shall be the premium type in accordance with NEMA MG 1 E ONAT Tripper The trippe reversible bearings t clamps for walk with and the mo toward the Its seal s to suit th shall be p limit swit rings and mounted o r shall be of steel construction motor propelled automatically or manually controlled It shall be equipped with antifriction hroughout rolled or forged steel wheels hand operated rail optional op
206. second clause in brackets should be used when it is possible or definitely known that asbestos products for which no technically acceptable substitute exists may be included with the equipment kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Products which contain asbestos are prohibited This prohibition includes items such as packings or gaskets even though the item is encapsulated or the asbestos fibers are impregnated with binder material Except as provided below products which contain asbestos are prohibited This prohibition includes items such as packings and gaskets even though the item is encapsulated or the asbestos fibers are impregnated with binder material Asbestos products are acceptable only in exceptional cases where the Contractor states in writing that no suitable substitute material exists and in addition the Contractor furnishes to the Contracting Officer a copy of U S Department of Labor Occupational Safety and Health Administration Material Safety Data Sheet Form OSHA 20 completed by the asbestos manufacturer stating that the product is not an asbestos health hazard 4 DELIVERY STORAGE AND HANDLING Protect all equipment delivered and placed in storage from the weather humidity and temperature variation dirt and dust or other contaminants SECTION 23 70 01 00 10 Page 17 including an allowable service factor and other appurte
207. shall be capable of operating continuously at maximum specified capacity without damage or deterioration to the boiler setting firing equipment or auxiliaries The boiler shall be capable of automatically controlled operation while burning the fuel specified a2 ol Capacity Rated capacity shall be the capacity at which the boilers will operate continuously without exceeding the specified furnace heat release and transfer rates furnac xit temperature and gas exit temperature Boiler auxiliaries including fans motors drives and similar equipment shall be provided with at least 10 percent excess capacity to allow for field variations in settings and to compensate for any unforeseen increases in pressure losses in appurtenant piping and ductwork Stoker and grate capacities shall also be provided with 10 percent excess capacity to allow for variations in coal analysis e202 Electrical Equipment Electric motor driven equipment specified shall be provided complete with motors and necessary motor control devices Motors and motor control devices shall be in accordance with Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM including requirements for hazardous area locations Integral size motors of shall be premium efficiency type in accordance with NEMA MG 1 222d otor Ratings Motors shall be suitable for the voltage and frequency provided Motors 373 W 1 2 horsepower and larger shall be th
208. shall operate continuously in this manner until manually shut down Setting selector switch in manual position shall shut the unit down after filling Discharge shall then be accomplished by pressing the manual discharge button A high vacuum switch with time delay shall be provided to shut the system down automatically in the event none of the inlet valves are actuated Switches and controls shall be heavy duty type in accordance with NEMA ICS 1 24 345 14 6 Automatic Air Valve Automatic air valve shall be provided at economizer or air preheater ash inlet hopper discharge slide gate to allow air into system without causing a vacuum within the boiler ash hopper Slide gate shall be provided as part of the ash system and shall be manually operated and interlocked to actuate the automatic air inlet valve SECTION 23 70 01 00 10 Page 95 2 Sle lye5 Ash Silo The ash storage silo shall have a capacity of not less than metric tons tons of ash and fly ash considered to have an average weight of kg cubic meter pcf This capacity shall be based on a minimum of 24 hours 60 hours if ash cannot be removed on weekends The silo shall be made of welded steel with a cone bottom for truck filling and shall be supported on a structural steel tower All elements exposed to the exterior shall be designed for wind loads of kg square meter psf A 4 3 m 14 foot clearance shall be provided under the hopper outlet fitting or appurt
209. sphere of the coal specified 2 3 4 Ash Discharge Spreader stoker units with continuous or intermittent automatic mechanical ash discharge grates or one of the traveling grate type shall have a maximum loading of 2 2 Mega watts square meter 700 000 Btuh square foot of grate area Underfeed dumping grate units shall have a maximum loading 1 4 Mega watts square meter 450 000 Btuh square foot of grate assuming a 10 percent maximum ash content and 1205 degrees C 2 200 degrees F minimum ash softening temperature The area shall not include side dumping areas e235 Radiant Heating Surface Effective radiant heating surface shall be as specified in ASME BPVC SEC I For firetube steel firebox boilers it shall be the total water backed area within the furnace boundaries exposed to the flame The mean circumference shall be used for corrugated crown sheets SECTION 23 70 01 00 10 Page 20 24625366 Furnace Volume Furnace volume for watertube or firetube boilers is defined as the cubical volume between the top of the grate and the first plane of entry into or between the tubes If screen tubes are utilized they constitute the plane of entry PEIS Boiler Operating Capacity The boiler shall maintain continuous capacity within the specified range at the specified pressure with boiler feedwater at a temperature of approximately degrees C degrees F The flue gas outlet temperatur sha
210. stem Piping System ctor and Solids Recycle System for AFB Boilers s torage Tanks torage Tanks OMBUSTION CONTROL EQ UIPMENT Positioning Type Metering 1 Type Combustion Control Equipment Fuel Flow Ai Two Element 1 Master Pr 2 Fuel Fee 3 Air Flow 4 5 Automatic MNNNNNNE NNN ND DY Combustion Contro Boiler Limit Cont r Flow Type Combustion Control Steam Pressure Steam Flow essure Transmitter d Steam Flow Transmitter Transmitter Controller Power Units 2 2 6 Furnace D raft Controller ls with Oxygen Trim rols Burner Control Fuel Safety System 1 Design Requirements Diack L Maintenance and Reliability Requirements DeLEZ Adverse Electrical Conditions 2 System Design 3 System Functional Requirements Sie Sie L Operating Modes DBZ Furnace Purge and Boiler Monitor 5363 Mill Start Stop Sequences 5 3 4 Ignitor Control ORAIS Fuel Safety Subsystem J36 Flame Monitoring IGal Enclosures EIE PE Local Termination Boxes SECTION 23 70 01 00 10 Page 3 N NNNN NONNNNNNNNNNNNNDNB O NNNN NY PN UO OLO UO UO OUO O UO UO UO WOOO OO O Nu BWNs N H oy PNHNNNNNNE N ry 2c LT 18 LO 520 2 20 2 20 2 20 2 20 21 22 23 24 2 24 2 24 NNN NY OANA TAB WNE W oe
211. sts required to demonstrate satisfactory functional operation Adjust equipment and controls before the scheduled operating test A testing schedule shall be submitted to the Contracting Officer at least 15 days before the scheduled test Each operating test shall be conducted as directed by Contracting Officer a An efficiency and capacity test shall be run on one boiler of each size installed conducted in accordance with ASME PTC 4 abbreviated fficiency test utilizing the heat loss method except for use of measuring or metering devices properly calibrated before the test for the purpose of metering the water used and weighing the amount of fuel burned Water meter used in the test shall be suitable for hot water Instruments test equipment and test personnel required to properly conduct tests shall be provided by the Contractor The necessary fuel water and electricity will be furnished by the Government b The performance tests shall in each case cover the periods for the capacities tabulated below Percent of Capacity Time Minimum Waterwall and Watertube Firetube and Boilers Boilers First 1 hour 50 50 Next 1 hour 75 75 SECTION 23 70 01 00 10 Page 114 Percent of Capacity Time Minimum Waterwall and Watertube Firetube and Boilers Boilers Next 4 hours 100 100 Next 2 hours 110 The efficiency tests may be conducted either concur
212. supported and shall have a brass or bronze sampling cock with lever or compression handle A sampling glass container suitable for handling the water temperature to b ncountered and a hydrometer or equivalent device suitable for measuring the concentration of solids in the water and reading in parts per million shall be provided ZI l3 Oxygen Analyzer If oxygen compensation controls are furnished an oxygen analyzer shall be provided to indicate record and control the percentage of net excess oxygen in and the average temperature of the flue gas leaving the boiler The oxygen analyzer shall be of the direct probe type utilizing an in situ zirconium sensing element The element shall be inserted directly into the process flue gas stream and shall directly contact the process gases The sensing element shall be contained within a protective shield mounted to the ductwork by an adapter plate furnished by the manufacturer The analyzer shall be equipped to allow daily automatic calibration check without removing the analyzer from the process That is sample gases may be injected directly on the sensing element while the analyzer is in the process The analyzer shall include any temperature compensation of control required The output signal range shall be 4 to 20 mA dc and shall represent 0 to 10 percent as a linear function 2 9 14 Continuous Blowdown kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
213. system and pulverizer mill trip MT systems A mill trip system shall be provided for each mill Each fuel safety system shall provide the protection for its respective fuel and shall include a dedicated hardwired relay which may be directly operated from the operator insert panel The master fuel trip system shall provide overall boiler protection shall also include a dedicated hardwired relay and shall directly trip all other fuel safety system relays The system shall be designed to deenergize to trip 2830238 Flame Monitoring Individual self checking flame scanners are required for each burner Ignitor flame safety devices shall discriminate individually from any flame that may exist at other burner locations Burner flame shall be discriminated individually from the associated ignitor flame and any other flame that may exist in the furnace Ignitor and burner flame discrimination shall cover the range from startup to full load operation Blocking interlocks from closed valves in flame discrimination circuits to avoid false flame indication are not acceptable If required to obtain Satisfactory flame discrimination xtended tube scanners shall be SECTION 23 70 01 00 10 Page 52 22 Gre Service Air Compressors The service air requirements shall be as indicated with receivers sized as indicated The units shall be suitable for heavy duty service soot blowing The compressors sha
214. t is pulled against the pipe stop A gauge provided by the pipe manufacturer shall be used to measure the diameter of the spigot ends to insure the diameter conforms to the tolerances specified by the manufacturer All pipe ends shall be gauged FRP pipe shall be utilized for buried piping only No aboveground FRP pipe is allowed Cutting shall be done with a hacksaw or circular saw with an abrasive cutting wheel VOD e1 Installation Pipe shall be buried to the elevation shown on the profiles except that in no case shall pipe under roadways be buried less than 900 mm 36 inches Backfill shall not include large or sharp edged rocks of any size in direct contact with the pipe surfaces Compacting shall be done so as to avoid damage to the pipeline Conduits or sleeves of steel pipe at least 50 mm 2 inches in diameter larger than the FRP pipe size shall be provided under heavy traffic roadways Bending of pipe to follow ditch contours shall be limited to long trench curvatures and will not be permitted for abrupt changes in pipe direction Bend radii shall not be less than shown in the manufacturer s installation procedures PE o E Thrust Blocks Concrete thrust blocks shall be provided at all tees valves blind flanges reducers or whenever the pipe alignment changes direction They shall be sized in accordance with the pipe manufacturer s instructions to suit local soil conditions
215. t the pump s BEP and at the rated condition is within a margin of plus 0 percent and minus 10 percent Performance tests shall be in accordance with API Std 610 Procedures and results shall be subject to the approval of the Contracting Officer STEZ Condensate Pumps kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE If inadequate NPSH is available the designer shall give consideration to substituting either a double suction or positive displacement pump kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Condensate pumps shall be horizontal end suction single stage centrifugal motor driven pumps Pumps shall have stainless steel shafts and bronze impellers Pumps shall be provided with stuffing boxes Lubrication shall be by splash oil with oil level sightglass provided Pumps shall be subjected to the same tests specified for the Boiler Feedpumps adel CONDENSATE TANK AND ACCESSORIES Pe iy rae Condensate Tank Condensate tank shall be designed for a working pressure of 103 kPa 15 psig and shall conform to ASME BPVC SEC VIII Dl The tank shall have a storage capacity equal to or greater than indicated and shall be installed complete with piping and accessories SECTION 23 70 01 00 10 Page 64 Za Lhe F Float controlled valve shall be provided for be operated by a float control mechanism the tank The valve shall dwater Mak
216. terial dead load support effective seal with the enclosure wall and nonsifting air nozzles 6 10 Mechanical Collector and Solids Recycle System for AFB Boilers A mechanical cyclone dust collector at the outlet of the boiler shall be SECTION 23 70 01 00 10 Page 45 provided The mechanical dust collector shall be of the high efficiency multicyclone type designed for maximum operating temperatures encountered under all operating conditions The collectors shall be designed to resist erosion and minimize plugging shall be gas tight and shall have a collection efficiency of 85 to 95 percent on particles greater than 20 microns aerodynamic diameter depending upon the recycle rate selected by the manufacturer No refractory lining will be acceptable in the mechanical dust collector The collection hopper shall have a valley angle of at least 60 degrees below the horizontal The line carrying recycle solids back to the bed shall be fabricated of carbon steel with an allowance for wear and be installed at an angle of no less than 60 degrees below the horizontal The solids collection hopper and dipleg shall be provided with pressure differential measurement to indicate pluggage The design shall include provisions for sampling of recycle solids hopper contents The hopper shall be fabricated of material capable of enduring the conditions imposed by a flue gas atmosphere Provision for continuous disposal of ash from the recycle hoppers shal
217. terial Specification Type psig Steam 0 35000 500 Std wt black ASTM A53 A53M Type E Grade A steel Condensate return 0 17000 250 Extra strong ASTM A53 A53M Type E Grade A black steel Copper pipe ASTM B42 J Boiler feed amp 0 41000 600 Extra strong ASTM A53 A53 Type E Grade A blowoff lines black steel 2 Feedwater piping 0 8600 125 Std weight ASTM A53 A53 Type E Grade A black steel Water column 1 0 41000 600 Std weight ASTM A53 A53 Type E Grade A black steel 2 Vent amp exhaust 0 1700 25 Std weight ASTM A53 A53 Type E Grade A pipe black steel Compressed air 0 8600 125 Std weight ASTM A53 A53 Type E Grade A black steel Gauge piping 0 1700 25 Copper tubing ASTM B88MASTM B88 Type K or L Blask steel 2 ASTM A53 A53M Type E Grade A Fuel oil No 2 0 10000 150 Copper tubing ASTM B88MASTM B88 Type K or L Fiber API Spec 15LR reinforced plastic FRP buried service only Fuel oil Nos 4 0 10000 150 Std weight ASTM A53 A53M Type E Grade A 5 amp 6 black steel Control air 0 10000 150 Copper tubing ASTM B68 B68M Std weight ASTM A53 A53M Type E Grade A black steel Note 1 No bending of pipe will be permitted Crosses with pipe plugs at connections shall be provided Note 2 Extra strong XS minimum weight Conform to ASME B31 1 for wall thickness n ECTION 23 70 01 00 10 Page 111 TABLE II FITTINGS Service Size mm
218. terial requiring maintenance such as coils pumps control valves and other similar items 31033 Supports ERST Lk General kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Mechanical and electrical layout drawings and specifications for ceiling suspensions should contain notes indicating that hanger loads between panel points in excess of 23 kg 50 pounds shall have the excess hanger loads suspended from panel points kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Hangers used to support piping 50 mm 2 inches and larger shall be fabricated to permit adequate adjustment after erection while still supporting the load Pipe guides and anchors shall be installed to keep pipes in accurate alignment to direct the expansion movement and to prevent buckling swaying and undue strain All piping subjected to vertical movement when operating temperatures exceed ambient temperatures shall be supported by variable spring hangers and supports or by constant support hangers Pipe hanger loads suspended from steel joist between panel points shall not exceed 23 kg 50 pounds Loads exceeding 23 kg 50 pounds shall be suspended from panel points S252 822 Seismic Requirements kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE Provide seismic requirements if a Government designer either Corps office or
219. the unit subject to excessive wearing shall be replaceabl Crusher shall have provisions to trap and reject hard foreign objects without damaging the crusher Shafts shall be forged heat treated alloy steel with bearings mounted in dust tight housings Motor shall be totally enclosed nonventilated type totally enclosed fan cooled type totally enclosed fan cooled type suitable for installation ina Class II Division 1 Group F hazardous location in accordance with NFPA 70 SECTION 23 70 01 00 10 Page 90 Ja Motor voltage st dust tigh starter shall be manual magnetic across the line reduced art type with general purpose weather resistant water tight t explosion proof enclosure Integral size motors shall be the premium efficiency type in accordance with NEMA MG 1 30 16 Vibrating Feeders Vibrating input Bru tons hour pcf and wi pans ands inch thick feeder pan in length 10 gauge t rectangula 1 4 inch t coming in stainless headloads feeders shall be the electromagnetic electromechanical single te Force type with a capacity of 0 to metric tons hour when handling coal weighing approximately 800 kg cubic meter 50 th maximum lump size of mm inches in diameter Feeder kirts shall be replaceable 6 4 9 5 12 7 mm 1 4 3 8 1 2 Type 304 solid stainless steel plate without liners The shall be fabricated mm inches in width mm inches and mm inche
220. their flights mounted on the same pipe Th conveyor shall be provided with sectional supporting hanger bearings of the babbitted type Conveyor length between bearings shall not exceed 3 7 m 12 feet Trough ends shall be fabricated cast iron type with feet and fitted with babbitted bearings The drive shall be at the discharge end of the conveyor and shall consist of an electric gear motor and chain drive The chain drive from the motor to the reducer shall be enclosed in an oil tight casing Thrust in either direction shall be absorbed by the thrust bearings The motor may be mounted on top of the trough The trough conveyor housing shall be not less than 4 8 mm 3 16 inch steel with a 1 897 mm 14 gauge steel cover and shall be dust proof Discharge spout and coal gate shall be furnished as indicated An approved type of supporting saddle shall be provided Supports shall be spaced at not more than 3 m 10 foot intervals Motor enclosure shall be totally enclosed nonventilated totally enclosed fan cooled type suitable for installation in a Class II Division 1 Group F hazardous location in conformance with NFPA 70 Motor starter shall be manual magnetic across the line reduced voltage start type with weather resistant dust tight explosion proof enclosure Dust controlling covers and inlet and discharge enclosures shall be provided for each conveyor 23022 Belt Conveyor Belt conveyo
221. tic dense phase type complete with transfer vessels solenoid valves air receiver tank air producer and ash conveying piping The ash handling system shall be designed to handle metric tons hour tons hour of ash weighing approximately kg cubic meter pcf Each transport vessel shall be bolted to the hopper discharge flange where ash shall flow into the vessel by gravity until a level indicator indicates the vessel is full The transport vessel inlet valve then closes and transport air between 175 to 350 kPa 25 to 50 psi nters the vessel through a fluidizing unit located at the bottom of the vessel When the vessel has been brought to transport air pressure the transport line valve opens and a slug of fly ash is transported to the storage silo The transporting pipe shall be Schedule 40 standard black iron pipe mm inches diameter The material velocities in the transportation pipe shall be meters second fpm The system shall be provided with 210 to 410 kPa 30 to 60 psi compressed air to fluidize and transmit ash The conveying velocity shall not exceed 5 1 meters second 1000 fpm 31 09 Fly Ash Collectors Fly ash collectors shall be as specified in Section 44 10 00 AIR POLLUTION CONTROL Fly ash collectors shall be sized to handle total flue gas at maximum boiler load and stack temperature and shall be provided along with induced draft equipment Fly ash collector requirements shall be coordin
222. ting Inspection and Testing After field coating of the pipe joints th ntire pipe shall be inspected with an electric holiday detector having an operating crest voltage of from 12 000 to 15 000 volts when using a full ring spring type coil electrode The holiday detector shall be equipped with a bell buzzer or other audible signal which operates when a holiday is detected All detected holidays in the protective covering shall be repaired Occasional checks of holiday detector potential will be made by the Contracting Officer to determine suitability of the detector The inspection for holidays shall be performed just before covering the pipe with backfill and every precaution shall be taken during backfill to prevent damage to the protective covering Equipment and labor necessary for inspection shall be furnished by the Contractor 6 4 Installing Buried Piping Pipe and accessories shall be handled carefully to assure a sound undamaged condition Care shall be taken not to damage coating when lowering pipe into a trench and when backfilling Nonmetallic pipe shall be installed in accordance with pipe manufacturer s instructions Underground pipelines shall be laid with a minimum pitch of 25 mm per 15 m 1 inch per 50 feet Horizontal sections shall have a minimum coverage of 450 mm 18 inches Piping shall be free of traps and shall drain toward tank The full length of each section of underground pipe s
223. tion 33 56 10 FACTORY FABRICATED FUEL STORAGE TANKS SECTION 23 70 01 00 10 Page 46 e764 Underground Oil Storage Tanks Underground oil storage tanks and associated piping shall be in accordance with Section 33 56 10 FACTORY FABRICATED FUEL STORAGE TANKS 8 COMBUSTION CONTROL EQUIPMENT kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Subparagraphs describing inapplicable types of combustion control equipment will be deleted Positioning type combustion control equipment will be specified for boilers with capacity of 13 2 MW 45 000 000 Btuh or less Metering type equipment will be used for larger boilers Positioning type controls with oxygen compensation may be furnished for boilers with capacity of 13 2 MW 45 000 000 Btuh or more in lieu of metering type Oxygen compensated controls may be specified for boilers having output capacities of 7 3 MW 25 000 000 Btuh and greater if a life cycle cost analysis indicates it to be favorable kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Combustion control equipment shall be provided as a system by a single manufacturer An automatic combustion control system shall be installed for each boiler in accordance with the manufacturer s recommendations The controllers shall be located on the boiler room panel specified in paragraph BOILER ROOM PANELS AND INSTRUMENTS The equipment shall operate either
224. ts characteristics or welding properties are not affected Electrodes that have been wetted or that have lost any of their coating shall not be used 32 Dis 223 Flanges and Unions Flanges and unions shall be faced true and made square and tight Gaskets shall be nonasbestos compressed material in accordance with ASME B16 21 1 6 mm 1 16 inch thickness full face or self centering flat ring type The gaskets shall contain aramid fibers bonded with styrene butadiene rubber SBR or nitrile butadiene rubber NBR NBR binder shall be used for hydrocarbon service Union or flange joints shall be provided in each line immediately preceding the connection to each piece of equipment or material requiring maintenance such as coils pumps control valves and other similar items 31033 Supports ERST Lk General kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Mechanical and electrical layout drawings and specifications for ceiling suspensions should contain notes indicating that hanger loads between panel points in excess of 23 kg 50 pounds shall have the excess hanger loads suspended from panel points kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Hangers used to support piping 50 mm 2 inches and larger shall be fabricated to permit adequate adjustment after erection while still supporting the load Pipe guides and anchors shall be installed to keep
225. ts for which no technically acceptable substitute exists may be included with the equipment kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Products which contain asbestos are prohibited This prohibition includes items such as packings or gaskets even though the item is encapsulated or the asbestos fibers are impregnated with binder material Except as provided below products which contain asbestos are prohibited This prohibition includes items such as packings and gaskets even though the item is encapsulated or the asbestos fibers are impregnated with binder material Asbestos products are acceptable only in exceptional cases where the Contractor states in writing that no suitable substitute material exists and in addition the Contractor furnishes to the Contracting Officer a copy of U S Department of Labor Occupational Safety and Health Administration Material Safety Data Sheet Form OSHA 20 completed by the asbestos manufacturer stating that the product is not an asbestos health hazard 4 DELIVERY STORAGE AND HANDLING Protect all equipment delivered and placed in storage from the weather humidity and temperature variation dirt and dust or other contaminants SECTION 23 70 01 00 10 Page 17 25 EXTRA MATERIALS Submit spare parts data for each item of equipment specified after approval of the detail drawings and not later than I month
226. ttachment application the Type 39 saddle shall be used on all pipe 100 mm 4 inches and larger h Horizontal pipe supports shall be spaced as specified in MSS SP 69 and a support shall be installed not over 300 mm 1 foot from the pipe fitting joint at each change in direction of the piping Pipe supports shall be spaced not over 1 5 m 5 feet apart at valves In the support of multiple pipe runs on a common base member a clip or clamp shall be used where each pipe crosses the base support member Spacing of the base support members shall not exceed the hanger and support spacing required for any of the individual pipes in the multiple pipe run The clips or clamps shall be rigidly connected to the common base member A clearance of 3 mm 1 8 inch shall be provided between the pipe and clip or clamp for all piping which may be subjected to thermal expansion i Vertical pipe shall be supported at each floor except at slab on grade and at intervals of not more than 4 5 m 15 feet not more than 2 4 m 8 feet from end of risers and at vent terminations j Type 35 guides using steel reinforced polytetrafluoroethylene PTFE or graphite slides shall be provided where required to allow longitudinal pipe movement Lateral restraints shall be provided as required Slide materials shall be suitable for the system operating temperatures atmospheric conditions and bearing loads encountered 1 Where steel slides do
227. ut of specification or trip condition Recorders shall be furnished SECTION to provid 23 70 01 00 10 a permanent record of selected Page 98 system shall variables that relate to the ash handling system s performance and operation Control stations supplied with analog control loops shall provide bumpless transfer between the manual and automatic modes of operation The manual mode of operation shall provide direct control of the end device with no intervening analog control components unless those components are powered by the same source as the end device ol 3 Submerged Drag Chain Conveyor SDCC Submerged drag chain conveyor shall be designed to extract ash at normal capacity metric tons hour TPH and maximum capacity metric tons hour TPH based on a dry ash density of approximately kg cubic meter pcf The maximum chain speed shall be 76 mm second 15 fpm The SDCC shall be designed for continuous operation and shall have a storage capacity of cubic meter cu ft accumulation The SDCC shall have an upper compartment filled with water and a dry lower compartment The equipment shall be provided to maintain water temperature at approximately 60 degrees C 140 degrees F The dewatering slope shall be at an angle of degrees with the horizontal The top trough shall be not less than 9 5 mm 3 8 inch thick carbon steel plate welded construction lined with renewable abrasion resistant steel wear plates
228. ver bed feed systems shall be designed to provide even distribution over th ntire bed Heavy duty standard production spreader injector feeders shall be provided for dispersing the specified fuels into the boiler The spreader feeders shall be the chain type or equal as approved by the Contracting Officer The feeder portion shall be of the chain type with infinitely adjustable feed rate from 0 to 100 percent of rated capacity The spreaders shall consist of adjustable rotating paddles on a shaft designed to disperse the specified coals into the boiler at the required locations and to minimize side throw into adjacent bed compartments which may not be in operation The spreaders shall be capable of rotating at variable rates of speed The spreader feeders shall have overfire capability to th xtent required by the design for use in compensating for a spreader feeder out of service For spreader stoker coal feed systems sorbent feed shall be by separat systems These systems shall consist of a method to feed the correct proportion of sorbent over the load range to keep the sulfur oxides emission in compliance These systems shall feed over bed or in bed and may be gravity pneumatic or a combination Under bed coal feed systems shall be provided with coal dryers unless approved 2 02 5102 CFB Coal Feed Systems For CFB systems feed systems capable of providing the appropriate coal
229. vertical and shall be of the rising stem type Valves shall be of the angle or straight way type and shall operate without chattering hammering or sticking Valves shall be cast steel 3 4 11 Feedwater Regulator Feedwater regulator sized for the application shall be connected complete with all necessary piping and accessories for automatic operation Valved bypass shall be provided around control valve Units shall be provided with device to lock regulator in existing position in case of power failure Units shall be provided with manual automatic selector panel located on instrument panel Feedwater control element shall be provided with a drain valve The feedwater line shall be fitted with a thermometer well 3 4 12 Soot Blowers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Manually operated rotary soot blowers are normally supplied on boilers up to 6 Megawatts 20 million Btuh Delete the inappropriate type of soot blower kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Soot blowers shall be furnished as required to effectively clean all tube surfaces within the boiler Steam blowing pressure shall be adjustable Elements within the boiler shall be constructed of heat resisting alloys suitable for the flue gas temperature encountered and shall be removable without disturbing the boiler tubes Soot blowers shal
230. w DOP WNE ODANADUABWNHEPWBWWWWWWWNWWWWWWWrEWOADOUBWNE NNNNNNNNNNNDNDN W LN SS A H O A NANNNNNN PRP PR PRP DB BB Nb w De BeUOUBRNDNDNNBEND NBA BDA A HBRPNWWWWWWWWWWWWPBWNNNNNNWWNHNNNNNDND WWW WW WW WwW Ww WUNePEANNNN EGO BUNE NM NM NO Nb w n ECTION 23 70 01 00 10 Page 2 NNNNN WOW NM NMNNMNNN O NN ONNNNAINNN DN NH N NNN SA NNNNOOO OU DDDADADNNADAADAA DV OA awn a NN N N NONNNNNNNADAANNAUOBWNHNNNNNADAODONEFABWNHEREHFODMDTNDAHADUHBWNHEAOTOHOHOBWBNHE TDA BBB rope BS Vibrating Grate S al Grates Ze Stoker Contro 3 Hoppers VERIZED COAL BOILE T Coal Pulverizers Burners tokers ls RS Furnace Ash System Pulverizer Reject Control Systems Coal Master C Primary Air Flame Safety IZED BED COMBUST 1 2 Ro Air Temperatu 4 D 0 oe 8 R 1 Cc CO CO COO ON NM e S e rr E LE A a a oles Me ooooono Ww uo oO Ul E r VE S E e E E E a E General Furnace and Boile Forced Circulatio In Bed Tube Surfa Coal and Sorbent sal AFB Coal Feed 2 CFB Coal Feed S ontrol System re Control System ION BOILERS i n System ce AFB Designs Feed Systems System Systems Fluidized Bed Combustion Area Bed Material Letd Burners and Fuel Air Distribution Mechanical Colle GNITION OIL SYSTEM Ignition Oil Pump Burners Aboveground Oil S Underground Oil S own Sy
231. welds shall be removed during the final welding operation a Orta Li Erection Where the temperature of the component parts being welded reaches 0 degrees C 32 degrees F or lower the material shall be heated to approximately 38 degrees C 100 degrees F for a distance of 900 mm 3 feet on each side of the n ECTION 23 70 01 00 10 Page 103 weld before welding and the weld shall be finished before the materials cool to 0 degrees C 32 degrees F Sepa 2 24 Defective Welding Defective welds shall be removed and replaced Repairing of defective welds shall be in accordance with ASME B31 1 E PORTAAT Electrodes After filler metal has been removed from its original package it shall be protected or stored so that its characteristics or welding properties are not affected Electrodes that have been wetted or that have lost any of their coating shall not be used 32 Dis 223 Flanges and Unions Flanges and unions shall be faced true and made square and tight Gaskets shall be nonasbestos compressed material in accordance with ASME B16 21 1 6 mm 1 16 inch thickness full face or self centering flat ring type The gaskets shall contain aramid fibers bonded with styrene butadiene rubber SBR or nitrile butadiene rubber NBR NBR binder shall be used for hydrocarbon service Union or flange joints shall be provided in each line immediately preceding the connection to each piece of equipment or ma
232. wers shall positive closing type valve located in with the working parts protected and valve shall be operated by the same motor that Electrically operated retractable type soot blowers totally enclosed drive carriage with or dual motor electric drive enclosed in a Electrically operated soot blowers shall include stoker selected will be efficiently burning coal with fuel sizing conforming to ABMA Boiler 203 approximately content of mm inches in size with an approximate moisture percent and having the following analyses Proximate Analysis Percent Dry Moisture Cae Volatile Matter pe es Fixed Carbon a Ash n Ultimate Analysis Percent Dry Carbon a Hydrogen Lana Nitrogen Calc Sulfer aes Chlorine ae Ash ae Oxygen Diff a SECTION 23 70 01 00 10 Page 29 Btu lb as received Btu lb dry Grindability Raw Fuel Size Ash Analysis Percent Si0 2 Al 2 0 3 TiO 2 SO 3 Ash Fusion Temperatures Degrees C F Initial deformation temperature E Softening temperature Kac Fluid temperature EEEN 4 1 Spreader Stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Any paragraphs describing stoker equipment not necessary for the system specified will be deleted Stokers and stoking equipment selected will be
233. with a drain valve The feedwater line shall be fitted with a thermometer well 3 4 12 Soot Blowers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Manually operated rotary soot blowers are normally supplied on boilers up to 6 Megawatts 20 million Btuh Delete the inappropriate type of soot blower kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Soot blowers shall be furnished as required to effectively clean all tube surfaces within the boiler Steam blowing pressure shall be adjustable Elements within the boiler shall be constructed of heat resisting alloys suitable for the flue gas temperature encountered and shall be removable without disturbing the boiler tubes Soot blowers shall be furnished SECTION 23 70 01 00 10 Page 28 Btu lb as received Btu lb dry Grindability Raw Fuel Size Ash Analysis Percent Si0 2 Al 2 0 3 TiO 2 SO 3 Ash Fusion Temperatures Degrees C F Initial deformation temperature E Softening temperature Kac Fluid temperature EEEN 4 1 Spreader Stokers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Any paragraphs describing stoker equipment not necessary for the system specified will be deleted Stokers and stoking equipment selected will be
234. wn which are normally modulated during on line operation The burner control system shall be designed to operate reliably and to minimize the number of false trips 825 System Functional Requirements 839 S630 Operating Modes The operator shall have the responsibility for initiating the start and stop sequence listed below Once initiated the burner control system shall automatically place the mill or oil burner in service or remove it from service The steps each of which requires operator initiation are 1 Purge 2 Igniter control 3 Pulverizer control 4 Feeder control SECTION 23 70 01 00 10 Page 51 283 5 Sie2 Furnace Purge and Boiler Monitor The furnace purge control shall incorporate prelight off and post purges of the furnace to ensure that the boiler is free of any accumulation of combustibles Completion of the furnace purge shall be indicated to the operator after which the operator shall reset the master fuel trip relay A furnace purge shall be required on any master fuel trip The boiler monitor shall prevent starting any fuel equipment if the furnace firing permissives are not met The furnace purge control shall provide indications to the operator of the status and the progress of the furnace purge Permissive indications shall be extinguished when the MFT is reset 238 357 333 Mill Start St

UFGS 23 70 01.00 10 Central Steam-Generating System, Coal

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