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UFGS 26 42 17.00 10 Cathodic Protection System

1. shall be routed to a test station Each valve shall have a minimum of 2 4 1 kg 9 lb magnesium anodes routed through a test station Sections of metallic pipe 6 1m 20 foot long when used where force mains are within 3 m 10 feet of the water pipe shall have a minimum of 4 7 7 kg 17 1b anodes 4 MISCELLANEOUS INSTALLATION kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The cathodic protection system will fail SECTION 26 42 17 00 10 Page 31 24 12 Preformed Sheaths Preformed sheaths for encapsulating electrical wire splices to be buried underground shall fit the insulated wires entering the spliced joint sA t3 Epoxy Potting Compound Epoxy potting compound for encapsulating electrical wire splices to be buried underground shall be a two package system made for the purpose 4 14 Backfill Shields Backfill shields shall consist of approved pipeline wrapping or fiberglass reinforced coal tar impregnated tape or plastic weld caps specifically made for the purpose 4 15 Electrical Tape Pressure sensitive vinyl plastic electrical tape shall conform to UL 510 4 16 Cable Marker Tap Traceable marker tape shall be manufactured for the purpose and clearly labeled Cathodic Protection Cable Buried Below ALT Electrically Isolating Pipe Joints kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
2. 21 IMPRESSED CURRENT ANODES PAA Bare High Silicon Cast Iron Anodes Ze Led EN Chemical Composition Nominal 2 Lily Electrical Resistivity Prev LaS Physical Properties Nominal Zale a Bare Graphite Anodes Pama eas Canister Contained Anodes 2 1 4 Anode Connecting Cables 2215 5 Mixed Metal Oxide Anodes Zio gL Conductive Material Biel gS 2 Anode Life Test 2 38 Canister Contained Mixed Metal Oxide Anodes Ze LDA Anode Connecting Cables 2413 D9 Canister Connection Cables 2h Ltt 6 Deep Anode Connection Cables n ECTION 26 42 17 00 10 Page 1 3 2 2 4 Anode Requirements Anode sizes spacing number of anodes depth of well and other details shall be as shown E PAE Anode Lead Wire Each anode shall have a separate continuous wire extending from the anode to the junction box at the well head Se 22s 6 Anode Cables Anode cables shall terminate in a nearby junction box equipped with individual anode current shunts Where full length casing is used two wire connections from casing shall terminate in the junction box BeZe2eT Anode and Cable Installation If the method of installation utilizes backfill support for anodes and cable provide slack in the cable near each anode and increase the cabl insulation in thickness from 2 8 to 4 0 mm 7 64 to 5 32 inch utilizing an approved composite of plastic and elastomeric materials B24 28 Backfill Backfill the well with calc
3. Each test and measurement will be witnessed by the Contracting Officer Notify the Contracting Officer a minimum of 5 working days prior to each test After backfill of the pipe tank and anodes is completed but before the anodes are connected to the pipe tank the static potential to soil of the pipe tank shall be measured The locations of these measurements shall be identical to the locations specified for pipe tank to referenc lectrode potential measurements 262 Isolation Testing Before the anode system is connected to the pipe tank an isolation test shall be made at each isolating joint or fitting This test shall demonstrate that no metallic contact or short circuit exists between the two isolated sections of the pipe tank Any isolating fittings installed and found to be defective shall be reported to the Contracting Officer Gi Zer Insulation Checker Use a Model 601 insulation checker as manufactured by Gas Electronics or an approved equal for isolating joint flange electrical testing in accordance with manufacturer s operating instructions An isolating joint that is good will read full scale on the meter if an isolating joint is shorted the meter pointer will be deflected at near zero on the meter scale Location of the fault shall be determined from the instructions and the joint shall be repaired If an isolating joint is located inside
4. including permanent Cu Cu S04 reference cells and test returns shall be installed as indicated Pavement inserts shall be nonmetallic and shall allow Cu Cu S04 referenc lectrode to contact the electrolyte beneath the pavement surface Abbreviations shall not be used Welding of electrical connections shall be as follows Exothermic welds shall be CADweld Thermo weld or approved equal Use and selection of these materials and welding equipment shall be in accordance with the manufacturer s recommendations 4 9 Calibrated Shunts Install shunts calibrated in current per potential e g mA V between the lead or header wire connected to the anode and the current collector lead connected to the structure The calibration of the shunt shall be clearly marked and installed to be visible 4 10 Sealing and Dielectric Compound Sealing and dielectric compound shall be a black rubber based compound that is soft permanently pliable tacky moldable and unbacked Apply compound as recommended by the manufacturer but not less than 3 mm 1 8 inch thick 4 11 Protective Covering Except as otherwise specified protective covering for underground metallic SECTION 26 42 17 00 10 Page 21 explosion proof or dust ignition proof housing as appropriate Transformer tap adjusters will be provided in cases where an automatic system is not provided kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
5. 5 400 I feet The Contractor may use a continuous pipe to soil potential profile in lieu of 0 75 m 2 5 ft interval pipe to soil potential measurements Additional measurements shall be made at each distribution service riser with the referenc lectrode placed directly over the service line adjacent to the riser Potentials shall be plotted versus distance to an approved scale Locations where potentials do not meet or exceed the criteria shall be identified and reported to the Contracting Officer Or Dia Underground Tanks For underground tanks make a minimum of three measurements taken from the referenc lectrode located SECTION 26 42 17 00 10 Page 37 a Directly over the center of the tank b At a point directly over the tank and midway between each pair of anodes c At each end of the tank 6 6 Casing Tests Before final acceptance of the installation the electrical separation of carrier pipe from casings shall be tested and any short circuits corrected set Interference Testing kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Adverse effects may be caused by the foreign pipeline kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Before final acceptance of the installation interference tests shall be made with respect to any foreign pipes tanks in cooperation with the owner of the foreign pipes tanks A full report of
6. Provide anodes in packaged form with the anode surrounded by specially prepared quick wetting backfill and contained in a cloth or paper sack Anodes shall be centered in the backfill material The backfill material shall have the following composition unless otherwise indicated Material Percent by Weight Gypsum 75 Bentonite 20 Sodium Sulfate 5 woes Lead Wires Anode lead wires shall consist of No 10 solid copper wire with TW insulation Lead wires shall be not less than 3 m 10 feet in length without splices 5 4 Connection Wires Wires shall consist of No 10 solid copper wire with RHW USE or polyethylene insulation ow Insulation Type RHW USE insulation shall comply with NFPA 70 Polyethylene insulation shall comply with ASTM D1248 high molecular weight polyethylene shall be Type I Class C Grade E5 high density polyethylene shall be Type III Class C Grade E3 ti 5 6 Conduit Steel Conduit steel shall conform to UL 6 and ANSI C80 1 ied Tape Pressure sensitive vinyl plastic electrical tape shall conform to UL 510 Aponte Backfill Shields Provide shields consisting of approved wrapping of reinforced fiberglass coal tar impregnated tape or plastic weld caps specifically made for the purpose and installed in accordance with the manufacturer s recommendations When joint bonds are required due to the use of mechanical joints the entire joint shall
7. Qik General Requirements a Provide a complete operating impressed current cathodic protection system in accordance with NFPA 70 the applicable federal state and local regulations and the requirements of this contract In addition to the minimum requirements of these specifications construction of gas pipelines and associated cathodic protection systems shall be in compliance with 49 CFR 192 and construction of hazardous liquid pipelines and associated cathodic protection system shall be in compliance with 49 CFR 195 and construction and installation of underground fuel storage tanks and associated cathodic protection system shall be in compliance with 40 CFR 280 n ECTION 26 42 17 00 10 Page 7 2 a2 The The system includes planning inspecting the installation adjusting and testing cathodic protection and test system using rectifiers and impressed current anodes supplemented with sacrificial anodes as needed for utilities and equipment shown The cathodic protection system shall also include cables connectors splices corrosion protection test stations ace power panels and any other equipment required for a complete operating system providing the specified protection The cathodic protection system includes a calculations for rectifier anodes and any recommendations for supplementing or changing the minimum design criteria to provide the specified potentials and b equipment wiring and wiring
8. a trench excavated for the purpose at depths spacing and locations as shown Anodes shall be completely surrounded by the backfill at bottom sides and top for a distance of not less than 100 mm 4 inch Backfill shall be compacted sire hr Vertically Buried Bare Anodes Vertically buried bare anodes shall be installed in vertical holes in the ground having a depth spacing and location shown The holes in the SECTION 26 42 17 00 10 Page 28 3 2 2 4 Anode Requirements Anode sizes spacing number of anodes depth of well and other details shall be as shown E PAE Anode Lead Wire Each anode shall have a separate continuous wire extending from the anode to the junction box at the well head Se 22s 6 Anode Cables Anode cables shall terminate in a nearby junction box equipped with individual anode current shunts Where full length casing is used two wire connections from casing shall terminate in the junction box BeZe2eT Anode and Cable Installation If the method of installation utilizes backfill support for anodes and cable provide slack in the cable near each anode and increase the cabl insulation in thickness from 2 8 to 4 0 mm 7 64 to 5 32 inch utilizing an approved composite of plastic and elastomeric materials B24 28 Backfill Backfill the well with calcined petroleum coke breeze or metallurgical coke breeze surrounding the anodes by a method that does not leave voids or b
9. a vault the pipe shall be sleeved with insulator when entering and leaving the vault O22 Cathodic Protection Meter Use a Model B3A2 cathodic protection meter as manufactured by M C Miller or an approved equal using the continuity check circuit for isolating joint flange electrical testing Perform this test SECTION 26 42 17 00 10 Page 36 in addition to the Model 601 insulation checker Continuity is checked across the isolated joint after the test lead wire is shorted together and the meter adjusted to scale A full scale deflection indicates the system is shorted at some location The Model 601 verifies that the particular insulation under test is good and the Model B3A2 verifies that the system is isolated If the system is shorted further testing shall be performed to isolate the location of the short 64 3 Anode Output After the rectifier is energized the current output of the individual anode leads shall be measured by using an approved method This may be done with a shunt and MV meter a low resistance ammeter or a clamp on milliammeter The total current shall be measured and compared to the sum of all anode currents and to the rectifier output current If an individual anode output current meets or exceeds the recommended output for that anode the system shall be turned down or balancing resistors installed Calculation of the wattage of the resistors shall be suffi
10. are installed If a casing must be used it should be fiberglass reinforced plastic nonmetallic and should be located above the anode string kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Casing shall be mm inch outside diameter 3 mm 1 8 inch minimum wall thickness black steel pipe conforming to ASTM A53 A53M Type E or S Grade B The top casing shall be mm inch outside diameter 3 mm 1 8 inch minimum wall thickness black steel pipe conforming to ASTM A53 A53M Type E or S Grade B The metal casing shall extend no more than 1 5 Jem fS feet below the top of a well cap 74 48 Anode Centering Device for Deep Anode Ground Beds Anode centering device shall be nonmetallic and capable of maintaining centering in the hole without interfering with other anode lead wiring until coke breeze is packed in place 4 4 Conduit Nonmetallic conduit shall conform to NEMA TC 2 e405 Test Boxes and Junction Boxes Boxes shall be outdoor type conforming to UL 514A 4 6 Vent Pipes All deep wells shall be vented in anode zones Openings in the vent shall not be larger than 0 1524 mm 0 006 inch SECTION 26 42 17 00 10 Page 20 ee Polyethylene Insulation Polyethylene insulation shall comply with the requirements of ASTM D1248 and of the following types classes and grades v4 Tel High Molecular Weight Polyethylene GI ol High molecular weight polyethylene shall be Ty
11. be fusion welded or shall use UL 467 approved connectors e224 Cabinet Paint System The cabinet and mounting support shall be painted hot dipped galvanized aluminum stainless steel with the manufacturer s standard painting system The mounting support for the fiberglass cabinet shall be painted hot dipped galvanized aluminum stainless steel with the manufacturer s standard painting system SECTION 26 42 17 00 10 Page 17 environments kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Cable for anode header and distribution shall be No AWG stranded copper wire with type CP high molecular weight polyethylene 2 8 mm 7 64 inch thick insulation HMWPE protective jacketed cable with a fluorocopolymer inner or primary insulation 600 volt rating R OES Test Wires Test wires shall be No 12 AWG stranded copper wire with NFPA 70 Type TW or RHW or polyethylene insulation nE Resistance Wire Resistance wire shall be AWG No 16 or No 22 nickel chromium wire Be Deep Anode Ground Bed Casing kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE A metal casing should not be used except for a maximum of 1 5 meter 5 feet at the top for a well cap which also serves as a support for the suspension ropes The drilling mud on the sides of the hole will usually keep the hole open until the anodes and coke breeze
12. be protected with kraft paper joint cover The joint cover shall be filled with poured hot coal tar enamel one Electrical Connections Electrical connections shall be done as follows a Exothermic welds shall be Cadweld or Burndy Thermo Weld or approved equal Use of these materials shall be in accordance with the SECTION 26 42 17 00 10 Page 26 manufacturer s recommendations b Electrical shielded arc welds on steel pipe shall be approved via shop drawing action c Other methods of welding shall be specifically approved for use by the pipe manufacturer 222 dee lO Anode Installation Anode configuration and size shall be as indicated A minimum of one two three ten 15 anodes are required to achieve minus 850 millivolts instant off potential and shall be required on the components or structure Details shown are indicative of the general type of material required and are not intended to restrict selection of materials or of any particular manufacturer The anode system shall be designed for a life of 25 years of continuous operation 2216 LEAD WIRE CONNECTIONS Lead wire to structure connections shall be by exothermic welding process Weld charges made specifically for use on cast iron shall be used on cast iron pipe A backfill shield filled with a pipeline mastic sealant or material compatible with the coating shall be placed over the weld connection and
13. mm 2 1 2 inch nominal size or larger s2 LA Circuit Breaker A single double three pole flush mounted fully magnetic properly rated non terminal type circuit breaker shall be installed in the primary circuit of the rectifier supply transformer EES Fuses Cartridge type fuses with suitable fuse holders shall be provided in each leg of the de circuit SECTION 26 42 17 00 10 Page 16 2 e222 Cabinet Construction Cabinet shall be constructed of not lighter than 1 56 mm 16 gauge steel hot dipped galvanized steel stainless steel aluminum molded fiberglass reinforced polyester and shall be provided with a full door The enclosure shall have oil resistant gasket The door shall be hinged and have a hasp that will permit the use of a padlock The cabinet shall be fitted with screened openings of the proper size to provide for adequate cooling Holes conduit knockouts or threaded hubs of sufficient size and number shall be conveniently located wiles iad Wiring Diagram A complete wiring diagram of the power unit showing both the ac supply and the dc connections to anodes shall be on the inside of the cabinet door All components shall be shown and labeled AVARI Grounding Provisions Grounding provisions shall be as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM comply with NFPA 70 and UL 467 including a ground terminal in the cabinet The grounding conductor from th
14. shall cover th xposed metal adequately PART 3 EXECUTION 3 01 CRIT Gl RIA OF PROTECTION Acceptance criteria for determining the adequacy of protection on a buried pipe tank shall be in accordance with NACE SP0169 and NACE RP0193 and as specified below T Zuil Iron and Steel kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE If the second method is used the requirement for obtaining measurements over 95 percent of the entire metallic area is required as in the first method Verification of the 100 millivolts decay of polarization should be achieved at points over 95 percent of the entire metallic area kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Use the following method a for testing cathodic protection voltages If more than one method is required use method b a A negative voltage of at least minus 850 millivolts as measured between the pipe tank specified underground component and a saturated copper copper sulphate referenc lectrode contacting the electrolyte earth directly over the pipe tank specified underground component Determination of this voltage shall be made with the cathodic protection system in operation Voltage drops shall be considered for valid interpretation of this voltage measurement A minimum of minus 850 millivolts instant off potential between the structure pipe tank
15. specified underground component being tested and the reference cell shall be achieved over 95 percent of the area of the structure Obtain adequate number of measurements over the SECTION 26 42 17 00 10 Page 27 3 entire structure pipe tank or other metallic component to verify and record achievement of minus 850 millivolts instant off This potential shall be obtained over 95 percent of the total metallic area without the instant off potential exceeding 1200 millivolts A minimum polarization voltage shift of 100 millivolts as measured between the pipe tank and a saturated copper copper sulphate f i ferenc lectrode contacting the earth directly over the pipe tank This polarization voltage shift shall be determined by nterrupting the protective current and measuring the polarization decay When the protective current is interrupted an immediate voltage shift will occur The voltage reading after the immediat shift shall be used as the base reading from which to measure polarization decay Measurements achieving 100 millivolts shall be made over 95 percent of the metallic surface T2 Aluminum Aluminum pipes tanks shall not be protected to a potential more negative than minus 1200 millivolts measured between the pipe tank and a saturated copper copper sulphate referenc lectrode contacting the earth directly over the pipe tank metallic componen
16. the tests giving all details shall be made 6 8 Holiday Test Repair any damage to the protective covering during transit and handling before installation After field coating and wrapping has been applied inspect th ntire pipe by an electric holiday detector with impressed current in accordance with NACE SP0188 using a full ring spring type coil lectrode The holiday detector shall be equipped with a bell buzzer or other type of audible signal which sounds when a holiday is detected Holidays in the protective covering shall be repaired upon detection Occasional checks of holiday detector potential will be made by the Contracting Officer to determine suitability of the detector Furnish labor materials and equipment necessary for conducting the inspection Inspect the coating system for holes voids cracks and other damage during installation 6 9 Recording Measurements Record all pipe tank to soil potential measurements including initial potentials where required Locate correct and report to Contracting Officer any short circuits to foreign pipes tanks encountered during checkout of the installed cathodic protection system Pipe Tank to soil potential measurements are required on as many pipes tanks as necessary to determine th xtent of protection or to locate short circuits End of Section SECTION 26 42 17 00 10 Page 38
17. Electrical Wire 4 10 1 Anode Connecting Wire Ard eZ Anode Header Cable 4 13 Test Wires 4 1 4 Resistance Wire 2 oo v s9 6 7 4 4 8 9 1 1 4 11 3 Inspection of Pipe Coatings 4 11 4 Above Ground Piping System 12 Preformed Sheaths 13 Epoxy Potting Compound 14 Backfill Shields 15 Electrical Tape 16 Cable Marker Tap 17 Electrically Isolating Pipe Joints 4 17 1 Threaded Fittings 4 17 2 Electrically Isolating Pipe Joints 18 Electrically Conductive Couplings 19 Joint and Continuity Bonds 4 19 1 Resistance Bonds 4 19 2 Stray Current Measurements 20 Electrical Isolation of Structures MAGNESIUM ANODES soel Ok Composition Packaged Anodes n ECTION 26 42 17 00 10 Page 2 DNNNNNNDN NH N avn U FrRrRoO OANA UO BW AD Lead Wires Connection Wires Insulation Conduit Steel Tape Backfill Shields Electrical Connections Anode Installation WIRE CONNECTIONS PART 3 WNWWWEHR m e w Ww BWW WW WwW WWW WwW C 1 22 3 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 WWWWWWWWWWN WW WWW WW DN WW PWW PB WywWwWWh RWB IRNE EXE RIT GROU PRP RPRPR PR By ile ete gee wy ee ce MNNNNNMNNNN NY were MAGN 1 22 23 4 MISC NN 4 4 CUTION ERIA OF PROTECTION Iron and Steel Aluminum Copper Piping ND BED INSTALLATION Shallow Ground Beds Horizontally Buried Bare Anodes
18. Vertically Buried Bare Anodes Horizontally Buried Canister Contained Anodes Vertically Buried Canister Contained Anodes Cable Protection Multiple Anode Systems Distributed Anode Systems eep Anode Ground Beds node Centering asing asing Insulation node Requirements node Lead Wire node Cables node and Cable Installation ackfill able Marker Tap Pavement Inserts ESIUM ANODE INSTALLATION Installation of Packaged Anodes Underground Metal Pipe Line Lead and Resistance Wire Splices Magnesium Anodes for Metallic Components ELLANEOUS INSTALLATION Rectifier Installation Wire Connections OMDAIAIDUOBWNHRPODONADUOBWNEH Qwrrrraae pes ap L Wire Splicing 2 Steel Surfaces Pipe Joints Electrical Continuity lectrical Isolation of Structures Zest Isolating Fittings s2 Gas Distribution Piping 23 Steam High Temperature Chilled Water Line upply and Return Piping Line Conduit 4 3 2 4 Fuel Gasoline Storage Tanks Fire Suppression Pre Copper Piping 62206 Underground Storage Tanks UST issimilar Metals Ferrous Valves 3 3 D n ECTION 26 42 17 00 10 Page 3 Brass or Bronze Valves Metal Pipe Junction Casing Test Stations RAINING COURSE ESTS AND MEASUREMENTS Baseline Potentials Isolation Testing ek Insulation Checker 2 Cathodic Protection Meter Anode Output Electrode Potential Measurements Location
19. aintenance operations including testing procedures included in the maintenance SECTION 26 42 17 00 10 Page 35 instructions are to be covered The field instructions shall cover all of the items contained in the operating and maintenance instructions as well as demonstrations of routine maintenance operations including testing procedures included in the maintenance instructions At least 14 days prior to date of proposed conduction of the training course submit the training course curriculum for approval along with the proposed training date Training shall consist of demonstration of test equipment providing forms for test data and the tolerances which indicate that the system works satisfactorily 56 TESTS AND MEASUREMENTS Submit test reports in booklet form tabulating field tests and measurements performed upon completion and testing of the installed system and including close interval potential survey casing and interference tests final system test verifying protection insulated joint and bond tests and holiday coating test Submit a certified test report showing that the connecting method has passed a 120 day laboratory test without failure at the place of connection wherein the anode is subjected to maximum recommended current output while immersed in a 3 percent sodium chloride solution Each test report shall indicate the final position of controls 6 1 Baseline Potentials
20. anister Contained Mixed Metal Oxide Anodes Ze LDA Anode Connecting Cables 2413 D9 Canister Connection Cables 2h Ltt 6 Deep Anode Connection Cables n ECTION 26 42 17 00 10 Page 1 NUNN NNN NNN NNN N V VEON MN NN NN O1 NM BRP DM DB SeN N A S HBA HD DBPDYO YM DYONHMHBRHBRHBR HHO DY HBB IAI BiB MO MH HNHM id ECTIFIERS AND ASSOCIATE 0 EQUIPMENT ro A A W ere ere Deep Anode Ground Bed Casing Anode Centering Device for Deep Anode Ground Beds Conduit Test Boxes and Junction Boxes Vent Pipes Polyethylene Insulation sl High Molecular Weight Polyethylene eh eZ High Density Polyethylene Test Stations Calibrated Shunts Sealing and Dielectric Compound Protective Covering el Pipeline Metallic Components 2 Field Joints R s2 Rectifier Unit PANPA ET Transformer 22 od 2 Rectifiers Pio eS Meters Bede dA Circuit Breaker Ve ae re Fuses S22 Cabinet Construction 22 282 01 Wiring Diagram 2 LL 2 Grounding Provisions Bede in SB Resistance to Ground 2 2 2 4 Cabinet Paint System 258 Wiring v2 4 Oil Immersed Enclosures COKE BREEZE a esa Calcined Petroleum Coke Breeze Dry 2 Sip dL Electrical Resistivity 223512 General Backfill Specifications e Metallurgical Coke Breeze Processed PEE Electrical Resistivity Nominal PE SAET General Backfill Specifications MISCELLANEOUS MATERIALS ui
21. approximately as follows SECTION 26 42 17 00 10 Page 24 TYPICAL MAGNESIUM ANODE SIZE Cross sections may be round square or D shaped Nominal Weight Approx Size mm Nominal Gross Weight Nominal Package Dimensions kg lbs inch kg lbs Packaged mm inch in Backfill 1 43 76 X 76 X 1273 X 3 X 5 3 68 133 X 133 X 2035 1 4 X 5 1 4 X 8 ZAMET 76 X 76 X 2033 X 3 X 8 54913 133 X 133 X 2865 1 4 X 5 1 4 X 11 1 4 4 19 76 X 76 X 3563 X 3 X 14 2 327 133 X 5085 1 4 X 20 S012 102 X 102 X 3054 X 4 X 14 532 191 X 4577 1 2 X 18 12 Terp 102 X 102 X 4324 X 4 X 20 545 191 X 6107 1 2 X 24 Li 14 532 127 X 127 X 5215 X 5 X 30 968 216 X 7118 1 2 X 28 20 1 2 224130 178 X 178 X 4067 X 7 X 45 5100 254 X 61010 X 24 16 Zoe Composition Anode shall be of high potential magnesium alloy made of primary magnesium obtained from sea water or brine and not from scrap metal Magnesium anodes shall conform to ASTM B843 and to the following analysis unless otherwise indicated Element Percent by Weight Aluminum 0 02 maximum Manganese 1 50 maximum Zinc 0 05 Silicon 0 10 maximum Copper 0 02 maximum Nickel 0 002 maximum Iron 0 03 maximum Impurities 0 30 maximum Magnesium Remainder Furnish spectrographic analyses on samples from each heat or batch of anodes used on this project wn ECTION 26 42 17 00 10 Page 25 2 5 2 Packaged Anodes
22. as shown Anodes shall be completely surrounded by the backfill at bottom sides and top for a distance of not less than 100 mm 4 inch Backfill shall be compacted sire hr Vertically Buried Bare Anodes Vertically buried bare anodes shall be installed in vertical holes in the ground having a depth spacing and location shown The holes in the SECTION 26 42 17 00 10 Page 28 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk USACE NAVFAC AFCEC NASA UFGS 26 42 17 00 10 November 2008 Preparing Activity USACE Superseding UFGS 26 42 17 00 10 April 2006 UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated October 2015 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SECTION TABLE OF CONTENTS DIVISION 26 ELECTRICAL T SECTION 26 42 17 00 10 CATHODIC PROTECTION SYSTEM IMPRESSED CURRENT 11 08 PART 1 GENERAL ToT REFERENCES Wg 2 SYSTEM DESCRIPTION 52g General Requirements 1 2 62 Contractor s Modifications 13 SUBMITTALS 1 4 QUALITY ASSURANCE 4 1 Services of Corrosion Expert 4 2 Isolators 1 4 3 Anodes and Bond Wires 1 4 4 Surge Protection 1 4 5 Sacrificial Anodes 4 6 Nonmetallic Pipe Systems 1 4 6 1 Coatings dg 4 6352 Tracer Wire es DELIVERY STORAGE AND HANDLING 1 6 EXTRA MATERIALS PART 2 PRODUCTS
23. be changed to clear obstructions when approved Install anodes in sufficient number and of the required type size and spacing to obtain a uniform current distribution surface on the structure Prepackaged anodes shall be installed as shown on the drawings SECTION 26 42 17 00 10 Page 30 om 3 gri Installation of Packaged Anodes Install packaged anodes completely dry lower them into holes by rope sling or by grasping the cloth gather The anode lead wire shall not be used in lowering the anodes Backfill the hole with fine soil in 150 mm 6 inch layers and each layer shall be hand tamped around the anode The tamper shall not strike the anode or lead wire If immediate testing is to be performed add water only after backfilling and tamping has been completed to a point 150 mm 6 inch above the anode Approximately 8 L 2 gallons of water shall be poured into the hole after the water is absorbed by the soil backfilling and tamping shall be completed to the top of the hole Anodes shall be installed as shown When rock is found prior to achieving specified depth anode may be installed horizontally to a depth at least as deep as the bottom of the pipe with the approval of the Contracting Officer SOA Underground Metal Pipe Line Install anodes 610 mm 2 feet below the line to be protected unless otherwise noted on the drawings To facilitate periodic electrical measurements during the life of the
24. cells or varistors against over voltage surges and by current limiting devices against over current surges E E Meters Meters shall be accurate to within plus or minus 2 percent of full scale at 27 degrees C 80 degrees F and shall possess temperature stability above and below 27 degrees C 80 degrees F and shall possess temperature stability above and below 27 degrees C 80 degrees F of at least 1 percent per 5 degrees C 10 degrees F Separate meters shall be 63 5 mm 2 1 2 inch nominal size or larger s2 LA Circuit Breaker A single double three pole flush mounted fully magnetic properly rated non terminal type circuit breaker shall be installed in the primary circuit of the rectifier supply transformer EES Fuses Cartridge type fuses with suitable fuse holders shall be provided in each leg of the de circuit SECTION 26 42 17 00 10 Page 16 2 e222 Cabinet Construction Cabinet shall be constructed of not lighter than 1 56 mm 16 gauge steel hot dipped galvanized steel stainless steel aluminum molded fiberglass reinforced polyester and shall be provided with a full door The enclosure shall have oil resistant gasket The door shall be hinged and have a hasp that will permit the use of a padlock The cabinet shall be fitted with screened openings of the proper size to provide for adequate cooling Holes conduit knockouts or threaded hubs of sufficient size and number shall be conveniently locate
25. cient to handle the maximum load which will be encountered on the anode lead All measurements obtained the date time and locations of all measurements shall be recorded 6 4 Electrode Potential Measurements Upon completion of the installation and with the entire cathodic protection system in operation electrode potential measurements shall be made using a copper copper sulphate referenc lectrode and a potentiometer voltmeter or a direct current voltmeter having an internal resistance sensitivity of not less than 10 megohms per volt and a full scale of 10 volts The locations of these measurements shall be identical to the locations used for baseline potentials The values obtained and the date time and locations of measurements shall be recorded No less than 8 measurements shall be made over any length of line or component Additional measurements shall be made at each distribution service riser with the referenc lectrode placed directly over the service lin O25 Location of Measurements 625 1 Coated Piping or Conduit For coated piping or conduit take measurements from the reference electrode located in contact with the earth directly over the pipe Connection to the pipe shall be made at service risers valves test leads or by other means suitable for test purposes Pipe to soil potential measurements shall be made at intervals not exceeding 0 75 1 5 122 m 2 5
26. ctions and other types of welded connections to ferrous pipe and structures shall be approved before us 3 4 3 Pipe Joints kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This paragraph will be coordinated with and referenced in mechanical and electrical specifications kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 3 4 3 1 Electrical Continuity Underground pipe shall be electrically continuous except at places where electrically isolating joints are specified Pipe joined by means other than welding shall meet the following electrical continuity requirements a Mechanical joints that are not factory designed to provide electrical continuity shall be bonded by installing a metallic bond across the joint The bonding connections shall be made by the exothermic welding process wn ECTION 26 42 17 00 10 Page 33 b Mechanical joints designed to provide electrical continuity may be used 34 Sek Electrical Isolation of Structures Perform electrical isolation of structures as follows SE 423 2201 Isolating Fittings Install isolating flanges and couplings aboveground or within manholes wherever possible but an isolating device that electrically separates a pipeline shall not be installed in a confined area where a combustible atmosphere may collect unless precautions are taken to prevent arcing such as by means o
27. current The electrical isolation of underground facilities in accordance with acceptable industry practice shall be included under this section 4 4 Surge Protection Install approved zinc grounding cells or sealed weatherproof lightning arrestor devices across insulated flanges or fittings installed in underground piping as indicated on the drawings The arrestor shall be gapless self healing solid state type Zinc anode composition shall conform to ASTM B418 Type II Lead wires shall be number 6 AWG copper with high molecular weight polyethylene HMWPE insulation The zinc grounding cells shall not be prepackaged in backfill but shall be installed as detailed on the drawings Lightning arrestors or zinc grounding cells SECTION 26 42 17 00 10 Page 11 explosion proof or dust ignition proof housing as appropriate Transformer tap adjusters will be provided in cases where an automatic system is not provided kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Rectifier unit shall consist of a transformer rectifying elements transformer tap adjuster terminal block one dc output voltmeter one dc output ammeter one combination volt ammeter one toggle switch for each meter fuse holders with fuses for each dc circuit variable resistors an ac power supply circuit breaker lightning arresters for both input and output all wired and assembled in a weatherproof cabinet The overa
28. d wiles iad Wiring Diagram A complete wiring diagram of the power unit showing both the ac supply and the dc connections to anodes shall be on the inside of the cabinet door All components shall be shown and labeled AVARI Grounding Provisions Grounding provisions shall be as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM comply with NFPA 70 and UL 467 including a ground terminal in the cabinet The grounding conductor from the terminal to the earth grounding system shall be solid or stranded copper not smaller than No 6 AWG The earth grounding system shall consist of one or more ground rods Ground rods shall be of copper clad steel conforming to UL 467 zinc coated steel conforming to IEEE C135 30 solid stainless steel not less than 16 19 mm 5 8 3 4 inch in diameter by 2 4 3 1 m 8 10 feet in length Rods shall be driven full length into the earth Sectional type rods may be used e2i2e3 Resistance to Ground kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Remove this paragraph if not required in the project kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk The resistance to ground shall be measured using the fall of potential method described in IEEE 81 The maximum resistance of driven ground shall not exceed 25 ohms under normally dry conditions If this resistance cannot be obtained with a single r
29. devices necessary to produce a continuous flow of direct current from anodes in the soil electrolyte to the pipe surfaces c Submit 6 copies of Detail Drawings consisting of a complete list of equipment and material including manufacturer s descriptive and technical literature catalog cuts results of system design calculations including soil resistivity installation instructions and certified test data stating the maximum recommended anode current output density and the rate of gaseous production if any at that current density Detail drawings shall contain complete wiring and schematic diagrams and any other details required to demonstrate that the system has been coordinated and will function properly as a unit The installation shall meet the specified protection criteria for a 25 year life d Submit 6 copies of operating manual outlining the step by step procedures required for system startup operation adjustment of current flow and shutdown The manuals shall include the manufacturer s name model number service manual parts list and brief description of all equipment and their basic operating features e Submit 6 copies of maintenance manual listing routine maintenance procedures recommendation for maintenance testing possible breakdowns and repairs and troubleshooting guides The manuals shall include single line diagrams for the system as installed instructions in making pip
30. e tank to reference cell potential measurements and frequency of monitoring instructions for dielectric connections interference and sacrificial anode bonds instructions shall include precautions to ensure safe conditions during repair of pipe system Contractor s Modifications specified system is based on an impressed current system supplemented with magnesium anodes The Contractor may modify the cathodic protection system after review of the project site verification and analysis if the proposed modifications include the impressed current anodes and rectifiers and will provide better overall system performance a Submit 6 copies of detail drawings showing proposed changes in location scope or performance indicating any variations from additions to or clarifications of contract drawings The drawings shall show proposed changes in anode arrangement anode size and number anode materials and layout details conduit size wire size mounting details wiring diagram method for electrically isolating each pipe and any other pertinent information to the proper installation and performance of the system n ECTION 26 42 17 00 10 Page 8 Ta 3 The modifications shall be fully described shall be approved by the Contracting Officer and shall meet the following criteria The proposed system shall achieve a minimum pipe to soil Instant Off potential of minus 850 millivolts with
31. e done where determined during construction or testing or as directed Joint bonding shall include excavation and backfilling There shall be a minimum of 2 continuity bonds between each structure and other than welded or threaded joints Electrical continuity shall be tested across joints with other than welded or threaded joints and across metallic portions of sewage lift stations and water booster stations PE E E A Resistance Bonds Resistance bonds shall be adjusted for minimum interference while achieving the criteria of protection Alternate methods may be used when approved P EE Stray Current Measurements Perform stray current measurements as indicated Alternate methods may be used when approved The stray current test report shall indicate location of test type of pipes tested method of testing IRS 224 20 Electrical Isolation of Structures Isolating fittings including isolating flanges and couplings shall be installed above ground or in a concrete hand hole As a minimum isolating flanges or unions shall be provided at the following locations a Connection of new piping to existing pipes b Pressure piping under floor slab to a building Additionally isolation shall be provided between new pipe lines and foreign pipes that cross the new lines within 3 m 10 feet Zed MAGNESIUM ANODES Weights and dimensions of magnesium anodes shall be
32. e terminal to the earth grounding system shall be solid or stranded copper not smaller than No 6 AWG The earth grounding system shall consist of one or more ground rods Ground rods shall be of copper clad steel conforming to UL 467 zinc coated steel conforming to IEEE C135 30 solid stainless steel not less than 16 19 mm 5 8 3 4 inch in diameter by 2 4 3 1 m 8 10 feet in length Rods shall be driven full length into the earth Sectional type rods may be used e2i2e3 Resistance to Ground kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Remove this paragraph if not required in the project kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk The resistance to ground shall be measured using the fall of potential method described in IEEE 81 The maximum resistance of driven ground shall not exceed 25 ohms under normally dry conditions If this resistance cannot be obtained with a single rod additional rods not less than 1 8 m 6 feet on centers or if sectional type rods are used additional sections may be coupled and driven with the first rod In high ground resistance UL listed chemically charged ground rods may be used If the resultant resistance exceeds 25 ohms measured not less than 48 hours after rainfall the Contracting Officer shall be notified immediately Connections below grade shall be fusion welded Connections above grade shall
33. ed ole2 General Backfill Specifications Bulk Density 1044 to 1204 kg cubic meter 65 to 75 lbs cubic foot Fixed Carbon 99 0 percent or greater Volatiles 0 2 percent or less Sizing 100 percent less than 13 mm 1 2 inch 223 52 Metallurgical Coke Breeze Processed Breeze shall conform to the following requirements 2 3 2 1 Electrical Resistivity Nominal Nominal electrical resistivity shall be a 100 milliohm meter 10 ohm centimeter Max tightly compacted SECTION 26 42 17 00 10 Page 18 b 100 milliohm meter to 150 milliohm meter 10 to 15 ohm centimeter lightly compacted c 150 to 200 milliohm meter 15 to 20 ohm centimeter loose 2 3 2 2 General Backfill Specifications Bulk density 608 to 672 kg per cubic meter 38 to 42 pounds per cubic foot Fixed Carbon 80 percent or greater Sizing 100 percent less than 10 mm 3 8 inch 2 4 MISCELLANEOUS MATERIALS Within 30 45 days after receipt of notice to proceed submit an itemized list of equipment and materials including item number quantity and manufacturer of each item The list shall be accompanied by a description of procedures for each type of testing and adjustment including testing of coating for thickness and holidays Installation of materials and equipment shall not commence until this submittal is approved Dig Ave ih Electrical Wire 2 4 1 1 Anode Connecting Wire kkkkkkkkkkkkkkkkkkkkkkkkkkkk
34. el storage tanks and associated cathodic protection system shall be in compliance with 40 CFR 280 n ECTION 26 42 17 00 10 Page 7 1 NEMA TC 2 2013 Standard for Electrical Polyvinyl Chloride PVC Conduit NATIONAL FIRE PROTECTION ASSOCIATION NFPA NFPA 70 2014 AMD 1 2013 Errata 1 2013 AMD 2 2013 Errata 2 2013 AMD 3 2014 Errata 3 4 2014 AMD 4 6 2014 National Electrical Code U S NATIONAL ARCHIVES AND RECORDS ADMINISTRATION NARA 40 CFR 280 Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks UST 49 CFR 192 Transportation of Natural and Other Gas by Pipeline Minimum Federal Safety Standards 49 CFR 195 Transportation of Hazardous Liquids by Pipeline UNDERWRITERS LABORATORIES UL UL 467 2007 Grounding and Bonding Equipment UL 506 2008 Reprint Oct 2013 Specialty Transformers UL 510 2005 Reprint Jul 2013 Polyvinyl Chloride Polyethylene and Rubber Insulating Tape UL 514A 2013 Metallic Outlet Boxes UL 6 2007 Reprint Nov 2014 Electrical Rigid Metal Conduit Steel 22 SYSTEM DESCRIPTION Submit proof that the materials and equipment furnished under this section conform to the specified requirements contained in the referenced standards or publications The label or listing by the specified agency will be acceptabl vidence of such compliance we
35. f anodes shall be buried a minimum of 610 mm 2 feet and each anode lead wire shall be connected to an individual terminal in a test station The anode lead cable shall make contact with the structure only through a test station Resistance wire shall be installed between the anode lead cable and the pipe cable in the test station to reduce the current output if required 3 3 Lead and Resistance Wire Splices Lead wire splicing when necessary shall be made with copper split bolt connectors of proper size The joint shall be carefully wrapped with at least 3 layers of electrical tape Resistance wire connections shall be done with silver solder and the solder joints wrapped with a minimum of 3 layers of pressure sensitive tape 3 4 Magnesium Anodes for Metallic Components As a minimum each metallic component shall be protected with 2 4 1 7 7 kg 9 17 I lb magnesium anodes located on each side of the metallic component and routed through a test station Fire hydrant pipe component shall have a minimum of 2 3 4 3 Lar kg 9 17 lb magnesium anodes routed through a test station for each hydrant Pipe under concrete slab shall have a minimum of ESI pes eo IL kg 17 ___ 1b anodes for each location where metal pipe enters the building under the slab A permanent reference cell shall be provided adjacent to the pipe entrance to the slab Conductors
36. f externally located surge arresters grounding cells or other means Isolating flanges and couplings in lines entering buildings shall be located at least 300 mm 12 inch above grade or floor level Pipelines entering buildings either below or above ground shall be electrically isolated from the structure wall with an electrically isolating gas tight wall sleeve wall sleeve 3 4 3 2 2 Gas Distribution Piping Provide electrical isolation at each building riser pipe to the pressure regulator at all points where a short circuit to another structure or to a foreign structure may occur and at other locations as indicated 3245 S223 Steam High Temperature Chilled Water Line Supply and Return Piping Line Conduit Provide electrical isolation at each building entrance and at other locations as indicated 3 4 3 2 4 Fuel Gasoline Storage Tanks Fire Suppression Provide electrical isolation in each pipe at the building at the tank as indicated 3A AAS Copper Piping Copper piping shall be electrically isolated at both ends of the pipe run wrapped with pipeline tape and electrically isolated at both ends 3 EAE S Underground Storage Tanks UST Electrically isolate tanks from other metallic structures Bond components protected with the tank such as pipes vents anchors and fill pipes to the tank 3 4 4 Dissimilar Metals kkkkkkkk
37. ge Tanks UST 49 CFR 192 Transportation of Natural and Other Gas by Pipeline Minimum Federal Safety Standards 49 CFR 195 Transportation of Hazardous Liquids by Pipeline UNDERWRITERS LABORATORIES UL UL 467 2007 Grounding and Bonding Equipment UL 506 2008 Reprint Oct 2013 Specialty Transformers UL 510 2005 Reprint Jul 2013 Polyvinyl Chloride Polyethylene and Rubber Insulating Tape UL 514A 2013 Metallic Outlet Boxes UL 6 2007 Reprint Nov 2014 Electrical Rigid Metal Conduit Steel 22 SYSTEM DESCRIPTION Submit proof that the materials and equipment furnished under this section conform to the specified requirements contained in the referenced standards or publications The label or listing by the specified agency will be acceptabl vidence of such compliance we Qik General Requirements a Provide a complete operating impressed current cathodic protection system in accordance with NFPA 70 the applicable federal state and local regulations and the requirements of this contract In addition to the minimum requirements of these specifications construction of gas pipelines and associated cathodic protection systems shall be in compliance with 49 CFR 192 and construction of hazardous liquid pipelines and associated cathodic protection system shall be in compliance with 49 CFR 195 and construction and installation of underground fu
38. he type of electrical isolating pipe joint to be used requires engineering design consideration In general the dielectric parts of an isolating joint will not withstand structural or environmental stresses as well as an all metal type of joint If the pipe on the cathodic protected side of the underground electrically isolating pipe joint including the joint is not effectively coated interference type corrosion may occur unless other measures are taken Factors to be considered include a Deflection stresses b Pull out stresses c Expansion contraction due to temperature changes d Is function as a union necessary e Is field assembly of critical parts practical f Hazardous locations to be avoided g Accessibility if above ground h Location of test box if below ground i Importance of coating the adjacent pipe if below ground j Vulnerability to short circuiting Factor of safety on pull out strength required has to be engineered for the specific conditions involved since no blanket provisions are fully applicable to all cases The requirement for isolating flanges or couplings should be based on a study of the conditions If the new piping is a short extension to an existing old piping system not wn ECTION 26 42 17 00 10 Page 32 under cathodic protection an isolating fitting should be installed at the point of connection Since the new piping will be anodic to the older system If the older system is under ca
39. il or submerged in fresh brackish or salt waters The CP high molecular weight polyethylene cable is also a direct buried and submergible type cable suitable for harsh environments but not as quiet as durable as the double insulated cable would be in the toughest of SECTION 26 42 17 00 10 Page 19 3 entire structure pipe tank or other metallic component to verify and record achievement of minus 850 millivolts instant off This potential shall be obtained over 95 percent of the total metallic area without the instant off potential exceeding 1200 millivolts A minimum polarization voltage shift of 100 millivolts as measured between the pipe tank and a saturated copper copper sulphate f i ferenc lectrode contacting the earth directly over the pipe tank This polarization voltage shift shall be determined by nterrupting the protective current and measuring the polarization decay When the protective current is interrupted an immediate voltage shift will occur The voltage reading after the immediat shift shall be used as the base reading from which to measure polarization decay Measurements achieving 100 millivolts shall be made over 95 percent of the metallic surface T2 Aluminum Aluminum pipes tanks shall not be protected to a potential more negative than minus 1200 millivolts measured between the pipe tank and a saturated copper copper sulphate referenc lectrode con
40. ined petroleum coke breeze or metallurgical coke breeze surrounding the anodes by a method that does not leave voids or bridging The recommended method is to pump the backfill from the bottom upward The well shall be over filled with coke breeze allowing for settlement so that the settled level after a number of days is as high as the level shown The number of days allowed for settling of the coke breeze will be determined by the Contracting Officer If the top level of coke breeze is below the level shown after settlement put additional coke breeze in the well The backfill used shall not require tamping The top portion of the well shall be sealed for 8 m 25 feet to prevent surface water run off All vents shall be vented above the high water mark and at a safe height B22 29 Cable Marker Tap Locate traceable marker tape in the same trench above cathodic protection cables including structure leads anode leads anode header cables test station leads bonding cables and rectifier electrical power cables 3 2 2 10 Pavement Inserts Install pavement inserts at a minimum of 30 m 100 foot intervals for pipelines The pavement inserts shall be installed directly over the structure being protected and tested 333 MAGNESIUM ANODE INSTALLATION Installation shall not proceed without the presence of the Contracting Officer unless otherwise authorized Anode locations may
41. ion 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 to Section 01 33 29 SUSTAINABILITY REPORTING Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES SD 02 Shop Drawings Detail Drawings G ____ Contractor s Modifications G ____ SD 03 Product Data Miscellaneous Materials G ____ Spare Parts SD 06 Test Reports Tests and Measurements Contractor s Modifications Gi 1 SD 07 Certificates Tests and Measurements Cathodic Protection System Services of Corrosion Expert G I SD 10 Operation and Maintenance Data Cathodic Protection System G ____ Training Course G ____ 4 QUALITY ASSURANC GI 4 1 Services of Corrosion Expert Obtain the services of a corrosion expert to supervise inspect the installation and performance of the cathodic pr
42. isolating pipe joints shall be of a type that is in regular factory production SECTION 26 42 17 00 10 Page 23 2 4 18 Electrically Conductive Couplings Electrically conductive couplings shall be of a type that has a published maximum electrical resistance rating given in the manufacturer s literature Cradles and seals shall be of a type that is in regular factory production made for the purpose of electrically isolating the carrier pipe from the casing and preventing the incursion of water into the annular space 2 4 19 Joint and Continuity Bonds Provide bonds across joints or any electrically discontinuous connections in the piping and other pipes and structures with other than welded or threaded joints included in this cathodic protection system Unless otherwise specified bonds between structures and across joints in pipe with other than welded or threaded joints shall be with No 4 AWG stranded copper cable with polyethylene insulation Bonds between structures shall contain sufficient slack for any anticipated movement between structures Bonds across pipe joints shall contain a minimum of 100 mm 4 inch of slack to allow for pipe movement and soil stress Bonds shall be attached by exothermic welding Exothermic weld areas shall be insulated with coating compound and approved by the Contracting Officer Continuity bonds shall be installed as necessary to reduce stray current interference Additional joint bonding shall b
43. kkkkkkkkkkkkkkkkkkkk NOTE The cathodic protection system will fail unless full consideration is given to specifications for electrically isolating pipe joints electrically conductive pipe joints and casing cradles and seals Mechanical and electrical specifications should reference this paragraph and paragraph Electrically Conductive Couplings kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkkkkk Electrically isolating pipe joints for above or below ground use shall be flexible mechanical pipe couplings of an electrically isolating type consisting of bolted or compression design provided with electrically isolating joint harness if required to provide pull out strength flexible integral electrically isolating pipe couplings designed for field installation by means of a swaging system and providing pull out strength with a factor of safety nonflexible flanged type electrically isolating pipe joints to be field assembled nonflexible factory assembled electrically isolating pipe joints designed with stub ends for installation by welding and providing pull out strength with a factor of safety a Aed od Threaded Fittings Threaded typ lectrically isolating pipe joints shall have molded plastic screw threads and be used above ground only Machined plastic screw threads shall not be used As 17 22 Electrically Isolating Pipe Joints Electrically
44. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Rectifier unit shall consist of a transformer rectifying elements transformer tap adjuster terminal block one dc output voltmeter one dc output ammeter one combination volt ammeter one toggle switch for each meter fuse holders with fuses for each dc circuit variable resistors an ac power supply circuit breaker lightning arresters for both input and output all wired and assembled in a weatherproof cabinet The overall efficiency of the rectifier shall be not less than 65 percent when operated at nameplate rating and shall be capable of supplying continuous full rated output at an ambient temperature of 44 degrees C 112 degrees F in full sunlight with expected life in excess of 10 years oe aL Transformer Transformer shall conform to UL 506 S266 dae Rectifiers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Below about 500 volt amperes of dc rating output single phase selenium rectifiers cost less to acquire and operate than silicon rectifiers Above 1000 volt amperes silicon rectifiers are more economical for both single phase and three phase Silicon rectifiers are more economical to repair kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Rectifying elements shall be silicon diodes selenium cells connected to provide full wave rectification Silicon diodes shall be protected by selenium surge
45. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Any pinhole cut scratch or other damage to the anode cable exposing bare copper to the electrolyte will result in early failure of the cathodic protection system For this reason special extra heavy insulation is used on anode cable While it is often expedient to use the same type wire for the cathodic negative cable in order to avoid a mix up in the field the cathode cable is not subject to anodic failure and lesser insulation can be used kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxk Anode connecting wire shall be No 8 I AWG stranded copper wire with type CP high molecular weight polyethylene insulation 2 8 mm 7 64 inch thick 600 volt rating Cable to anode contact resistance shall be 0 003 ohms maximum Deep anode ground bed connecting wire shall be No 8 AWG stranded copper wire with an inner jacket of 1 mm 40 mils of Halar insulation covered by an outer jacket of 1 6 mm 65 mils CP high molecular weight polyethylene insulation 600 volt rating Cable to anode contact resistance shall be 0 02 ohms maximum 2246182 Anode Header Cable kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The double insulated fluorocopolymer cable is intended for use in very harsh environments such as deep anode bed installations where chlorine and hydrogen gases are generated This cable can be installed directly in so
46. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk USACE NAVFAC AFCEC NASA UFGS 26 42 17 00 10 November 2008 Preparing Activity USACE Superseding UFGS 26 42 17 00 10 April 2006 UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated October 2015 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SECTION TABLE OF CONTENTS DIVISION 26 ELECTRICAL T SECTION 26 42 17 00 10 CATHODIC PROTECTION SYSTEM IMPRESSED CURRENT 11 08 PART 1 GENERAL ToT REFERENCES Wg 2 SYSTEM DESCRIPTION 52g General Requirements 1 2 62 Contractor s Modifications 13 SUBMITTALS 1 4 QUALITY ASSURANCE 4 1 Services of Corrosion Expert 4 2 Isolators 1 4 3 Anodes and Bond Wires 1 4 4 Surge Protection 1 4 5 Sacrificial Anodes 4 6 Nonmetallic Pipe Systems 1 4 6 1 Coatings dg 4 6352 Tracer Wire es DELIVERY STORAGE AND HANDLING 1 6 EXTRA MATERIALS PART 2 PRODUCTS 21 IMPRESSED CURRENT ANODES PAA Bare High Silicon Cast Iron Anodes Ze Led EN Chemical Composition Nominal 2 Lily Electrical Resistivity Prev LaS Physical Properties Nominal Zale a Bare Graphite Anodes Pama eas Canister Contained Anodes 2 1 4 Anode Connecting Cables 2215 5 Mixed Metal Oxide Anodes Zio gL Conductive Material Biel gS 2 Anode Life Test 2 38 C
47. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk NOTE This paragraph will be coordinated with and referenced in mechanical and electrical specifications kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Buried piping of dissimilar metals including new and old steel piping excepting valves shall be electrically separated by means of electrically insulating joints at every place of connection The insulating joint SECTION 26 42 17 00 10 Page 34 including the pipes shall be coated with an underground type dielectric coating for a minimum distance of 10 diameters on each side of the joint 45 Ferrous Valves Dissimilar ferrous valves in a buried ferrous pipeline including the pipe shall be coated with an underground type dielectric coating for a minimum distance of 10 diameters on each side of the valve 4 6 Brass or Bronze Valves Brass or bronze valves shall not be used in a buried ferrous pipeline Ach Metal Pipe Junction If the dissimilar metal pipe junction including valves is not buried and is exposed to atmosphere only the connection or valve including the pipe shall be coated with an underground type dielectric coating for a minimum distance of 3 diameters on each side of the junction 4 8 Casing kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This paragraph will be deleted if mechanical and electrical specificatio
48. ll efficiency of the rectifier shall be not less than 65 percent when operated at nameplate rating and shall be capable of supplying continuous full rated output at an ambient temperature of 44 degrees C 112 degrees F in full sunlight with expected life in excess of 10 years oe aL Transformer Transformer shall conform to UL 506 S266 dae Rectifiers kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE Below about 500 volt amperes of dc rating output single phase selenium rectifiers cost less to acquire and operate than silicon rectifiers Above 1000 volt amperes silicon rectifiers are more economical for both single phase and three phase Silicon rectifiers are more economical to repair kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Rectifying elements shall be silicon diodes selenium cells connected to provide full wave rectification Silicon diodes shall be protected by selenium surge cells or varistors against over voltage surges and by current limiting devices against over current surges E E Meters Meters shall be accurate to within plus or minus 2 percent of full scale at 27 degrees C 80 degrees F and shall possess temperature stability above and below 27 degrees C 80 degrees F and shall possess temperature stability above and below 27 degrees C 80 degrees F of at least 1 percent per 5 degrees C 10 degrees F Separate meters shall be 63 5
49. ns include these requirements kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Where a pipeline is installed in a casing under a roadway or railway the pipeline shall be electrically isolated from the casing and the annular space sealed against incursion of water 4 9 Test Stations Test stations shall be of the type and location shown and shall be curb box post mounted Buried electrically isolating joints shall be provided with test wire connections brought to a test station Changes in designated location shall have prior approval Unless otherwise shown other test stations shall be located as follows a At 300 m 1 000 foot intervals or less b Where the pipe or conduit crosses any other metal pipe c At both ends of casings under roadways and railways d Where both ends of an insulating joint are not accessible above ground for testing purposes feo TRAINING COURS GI Conduct a training course for the operating staff as designated by the Contracting Officer The training period shall consist of a total of 16 hours of normal working time and shall start after the system is functionally completed but prior to final acceptance tests Submit the proposed Training Course Curriculum including topics and dates of discussion indicating that all of the items contained in the operating and maintenance instructions as well as demonstrations of routine m
50. od additional rods not less than 1 8 m 6 feet on centers or if sectional type rods are used additional sections may be coupled and driven with the first rod In high ground resistance UL listed chemically charged ground rods may be used If the resultant resistance exceeds 25 ohms measured not less than 48 hours after rainfall the Contracting Officer shall be notified immediately Connections below grade shall be fusion welded Connections above grade shall be fusion welded or shall use UL 467 approved connectors e224 Cabinet Paint System The cabinet and mounting support shall be painted hot dipped galvanized aluminum stainless steel with the manufacturer s standard painting system The mounting support for the fiberglass cabinet shall be painted hot dipped galvanized aluminum stainless steel with the manufacturer s standard painting system SECTION 26 42 17 00 10 Page 17 20223 Wiring Wiring shall be installed in accordance with NFPA 70 utilizing type TW or RHW or polyethylene insulation Fittings for conduit and cable work shall conform to UL 514A Outlets shall be of the threaded hub type with gasketed covers Conduit shall be hub type with gasketed covers Conduit shall be securely fastened at 2 4 m 8 foot intervals or less Splices shall be made in outlet fittings only Conductors shall be color coded for identification Cable for anode header and dis
51. of Measurements I Coated Piping or Conduit 22 Underground Tanks Casing Tests Interference Testing Holiday Test Recording Measurements Be BBD WO CO 1I oO qd Ww WWD UW WW WwW WW NN w DDNDDWWADD WW ODO U ul OMANADAHADWTHBWAAH DD t WWW Ww End of Section Table of Contents n ECTION 26 42 17 00 10 Page 4 FOI III III IO IOI II III IO IO IO III e e ke III TO ke ke k k k ke ke kekk k k USACE NAVFAC AFCEC NASA UFGS 26 42 17 00 10 November 2008 Preparing Activity USACE Superseding UFGS 26 42 17 00 10 April 2006 UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated October 2015 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk SECTION 26 42 17 00 10 CATHODIC PROTECTION SYSTEM IMPRESSED CURRENT 11 08 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE This guide specification covers the requirements for a cathodic protection system using impressed current anodes 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 re
52. otection system and test Corrosion expert refers to a person who by reason of thorough knowledge of the physical sciences and the principles of engineering and mathematics acquired by professional education and related practical experience is qualified to engage in the practice of corrosion control of buried metallic piping and tank systems SECTION 26 42 17 00 10 Page 10 a Such a person shall be accredited or certified by the National Association of Corrosion Engineers NACE as a NACE Accredited Corrosion Specialist or a NACE certified Cathodic Protection CP Specialist or be a registered professional engineer who has certification or licensing that includes education and experience in corrosion control of buried or submerged metallic piping and tank systems if such certification or licensing includes 5 years experienc in corrosion control on underground metallic surfaces of the type under this contract b Submit the corrosion expert s name and qualifications certified in writing to the Contracting Officer prior to the start of construction including the name of the firm the number of years of experience and a list of not less than five of the firm s installations three or more years old that have been tested and found satisfactory c The corrosion expert shall make at least 3 visits to the project site The first of these visits shall include obtaining soil resistivity data acknowledging
53. pacing to obtain a uniform current distribution surface on the structure Prepackaged anodes shall be installed as shown on the drawings SECTION 26 42 17 00 10 Page 30 om 3 gri Installation of Packaged Anodes Install packaged anodes completely dry lower them into holes by rope sling or by grasping the cloth gather The anode lead wire shall not be used in lowering the anodes Backfill the hole with fine soil in 150 mm 6 inch layers and each layer shall be hand tamped around the anode The tamper shall not strike the anode or lead wire If immediate testing is to be performed add water only after backfilling and tamping has been completed to a point 150 mm 6 inch above the anode Approximately 8 L 2 gallons of water shall be poured into the hole after the water is absorbed by the soil backfilling and tamping shall be completed to the top of the hole Anodes shall be installed as shown When rock is found prior to achieving specified depth anode may be installed horizontally to a depth at least as deep as the bottom of the pipe with the approval of the Contracting Officer SOA Underground Metal Pipe Line Install anodes 610 mm 2 feet below the line to be protected unless otherwise noted on the drawings To facilitate periodic electrical measurements during the life of the sacrificial anode system and to reduce the output current of the anodes if required anode lead wires in a single group o
54. pe I Class C Grade e E High Density Polyethylene High density polyethylene shall be Type III Class C Grade E3 4 8 Test Stations Provide test stations complete with an insulated terminal block having the indicated number of terminals provided with a lockable cover and have a cast in legend C P Test and complete with an insulated terminal block having the required number of terminals One terminal required for each conductor Provide sufficient test stations to monitor underground isolation points Test bond stations potential measurement and stray current control shall be provided to monitor pipe to soil potential of proposed underground pipes or existing underground metallic structures which may conduct stray current from the new cathodic protection system The location of the test bond stations shall ensure that the pipe to soil potential of metallic pipe not designated to be protected is not made less negative by the energization of the cathodic protection system Test station terminal connections and the terminal conductor shall be permanently tagged to identify each termination of the conductors e g identify the conductors connected to the protected structures Conductors shall be permanently identified in the station by means of plastic or metal tags or plastic sleeves to indicate termination Each conductor shall be color coded in accordance with the drawings The station test facility
55. quirements not required in respective project whether or not brackets 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 26 42 17 00 10 Page 5 1 NEMA TC 2 2013 Standard for Electrical Polyvinyl Chloride PVC Conduit NATIONAL FIRE PROTECTION ASSOCIATION NFPA NFPA 70 2014 AMD 1 2013 Errata 1 2013 AMD 2 2013 Errata 2 2013 AMD 3 2014 Errata 3 4 2014 AMD 4 6 2014 National Electrical Code U S NATIONAL ARCHIVES AND RECORDS ADMINISTRATION NARA 40 CFR 280 Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Stora
56. reference to a saturated copper copper sulfate reference cell on the underground metallic components of the piping tanks Jis Take resistivity measurements of the soil in the vicinity of the pipes tanks and ground bed sites based upon the measurements taken adjust current and voltage of the rectifier as required to produce a minimum of minus 850 millivolts Instant Off potential between the structure being tested and the reference cell This potential shall be obtained over 95 percent of the metallic area without the Instant Off potential exceeding 1200 millivolts Submit final report regarding supplemental magnesium anode installation The report shall include pipe to soil measurements throughout the affected area indicating that the additions corrected the conditions which made the additional anodes necessary and current measurements for the additional anodes The following special materials and information are required Calculations on current and voltage for 100 V 40 V rectifier plus rectifier and meter specifications taping materials and conductors zinc grounding cell installation and testing procedures and equipment coating material system design calculations for rectifier anode number life and parameters to achieve protective potential backfill shield material and installation details showing waterproofing bonding and waterproofing details insulated resistance wire exothermic weld equipmen
57. ridging The recommended method is to pump the backfill from the bottom upward The well shall be over filled with coke breeze allowing for settlement so that the settled level after a number of days is as high as the level shown The number of days allowed for settling of the coke breeze will be determined by the Contracting Officer If the top level of coke breeze is below the level shown after settlement put additional coke breeze in the well The backfill used shall not require tamping The top portion of the well shall be sealed for 8 m 25 feet to prevent surface water run off All vents shall be vented above the high water mark and at a safe height B22 29 Cable Marker Tap Locate traceable marker tape in the same trench above cathodic protection cables including structure leads anode leads anode header cables test station leads bonding cables and rectifier electrical power cables 3 2 2 10 Pavement Inserts Install pavement inserts at a minimum of 30 m 100 foot intervals for pipelines The pavement inserts shall be installed directly over the structure being protected and tested 333 MAGNESIUM ANODE INSTALLATION Installation shall not proceed without the presence of the Contracting Officer unless otherwise authorized Anode locations may be changed to clear obstructions when approved Install anodes in sufficient number and of the required type size and s
58. sacrificial anode system and to reduce the output current of the anodes if required anode lead wires in a single group of anodes shall be buried a minimum of 610 mm 2 feet and each anode lead wire shall be connected to an individual terminal in a test station The anode lead cable shall make contact with the structure only through a test station Resistance wire shall be installed between the anode lead cable and the pipe cable in the test station to reduce the current output if required 3 3 Lead and Resistance Wire Splices Lead wire splicing when necessary shall be made with copper split bolt connectors of proper size The joint shall be carefully wrapped with at least 3 layers of electrical tape Resistance wire connections shall be done with silver solder and the solder joints wrapped with a minimum of 3 layers of pressure sensitive tape 3 4 Magnesium Anodes for Metallic Components As a minimum each metallic component shall be protected with 2 4 1 7 7 kg 9 17 I lb magnesium anodes located on each side of the metallic component and routed through a test station Fire hydrant pipe component shall have a minimum of 2 3 4 3 Lar kg 9 17 lb magnesium anodes routed through a test station for each hydrant Pipe under concrete slab shall have a minimum of ESI pes eo IL kg 17 ___ 1b anodes for each location where metal pipe enters the building under the
59. slab A permanent reference cell shall be provided adjacent to the pipe entrance to the slab Conductors shall be routed to a test station Each valve shall have a minimum of 2 4 1 kg 9 lb magnesium anodes routed through a test station Sections of metallic pipe 6 1m 20 foot long when used where force mains are within 3 m 10 feet of the water pipe shall have a minimum of 4 7 7 kg 17 1b anodes 4 MISCELLANEOUS INSTALLATION kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The cathodic protection system will fail SECTION 26 42 17 00 10 Page 31 unless full engineering considerations are applied to selection location and installation of electrically conductive joints and electrically isolating joints including the use of underground type dielectric coatings not paint Adequate electrical conductivity of a pipe joint made by means other than welding should be determined by the corrosion expert Allowable electrical resistance depends on the cross sectional area of the pipe metal the resistivity of the pipe metal and the effectiveness of the coating on the pipe Effectively coated pipe underground requires only a fraction of the electrical conductivity at joints needed for bare pipe Shop painted pipe is considered to be the same as bare pipe and is not to be confused with pipe coated with an underground type dielectric coating T
60. t Resistance if required shall be inserted in the anode circuit within the test station to reduce the potential of the aluminum pipe tank to a value which will not exceed a potential more negative than minus 1200 millivolts Voltage shift criterion shall be a minimum negative polarization shift of 100 millivolts measured between the pipe tank metallic component and a saturated copper copper sulphate referenc lectrode contacting the earth directly over the pipe tank The polarization voltage shift shall be determined as outlined for iron and steel SL Copper Piping For copper piping the following criteria shall apply A minimum of 100 millivolts of cathodic polarization between the structure surface and a stable referenc lectrode contacting the electrolyte The polarization voltage shift shall be determined as outlined for iron and steel IZ GROUND BED INSTALLATION soe Shallow Ground Beds Shallow ground beds shall contain size and quantity of anodes designed to meet performance criteria of the cathodic protection system at an initial operating current output density not exceeding 40 50 70 percent of maximum recommended current output density Sires Ba Horizontally Buried Bare Anodes Horizontally buried bare anodes shall be bedded on and covered with metallurgical coke breeze in a trench excavated for the purpose at depths spacing and locations
61. t and material SUBMITTALS kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE Review submittal description SD definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project The Guide Specification technical editors have designated those items that require Government approval due to their complexity or criticality with a G Generally other submittal items can be reviewed by the Contractor s Quality Control System Only add a G to an item if the submittal is sufficiently important or complex in context of the project For submittals requiring Government approval on Army projects a code of up to three characters within the submittal tags may be used following the G designation to indicate the approving authority 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 n ECTION 26 42 17 00 10 Page 9 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 Sect
62. tacting the earth directly over the pipe tank metallic component Resistance if required shall be inserted in the anode circuit within the test station to reduce the potential of the aluminum pipe tank to a value which will not exceed a potential more negative than minus 1200 millivolts Voltage shift criterion shall be a minimum negative polarization shift of 100 millivolts measured between the pipe tank metallic component and a saturated copper copper sulphate referenc lectrode contacting the earth directly over the pipe tank The polarization voltage shift shall be determined as outlined for iron and steel SL Copper Piping For copper piping the following criteria shall apply A minimum of 100 millivolts of cathodic polarization between the structure surface and a stable referenc lectrode contacting the electrolyte The polarization voltage shift shall be determined as outlined for iron and steel IZ GROUND BED INSTALLATION soe Shallow Ground Beds Shallow ground beds shall contain size and quantity of anodes designed to meet performance criteria of the cathodic protection system at an initial operating current output density not exceeding 40 50 70 percent of maximum recommended current output density Sires Ba Horizontally Buried Bare Anodes Horizontally buried bare anodes shall be bedded on and covered with metallurgical coke breeze in
63. the type of pipeline coatings to be used and reporting to the Contractor the type of cathodic protection required Once the submittals are approved and the materials delivered the corrosion expert shall revisit the site to ensure th Contractor understands installation practices and laying out the components The third visit shall involve testing the installed cathodic protection systems and training applicable personnel on proper maintenance techniques The corrosion expert shall supervise installation and testing of all cathodic protection 4 2 Isolators Isolators are required to isolate the indicated pipes from any other structure Isolators shall be provided with lightning protection and a test station as shown 4 3 Anodes and Bond Wires Install anodes in sufficient number and of the required type size and spacing to obtain a uniform current distribution of 2 5 milliamperes per 0 09 square meters square foot minimum to underground metal surfaces For each cathodic protection system the metallic components and structures to be protected shall be made electrically continuous This shall be accomplished by installing bond wires between the various structures Bonding of existing buried structures may also be required to preclude detrimental stray current effects and safety hazards Provisions shall be included to return stray current to its source without damaging structures intercepting the stray
64. thodic protection no isolating fitting should be used kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk 3 4 1 Rectifier Installation Mounting shall be as shown Pole or wall mounting shall be equipped with a channel bracket lifting eyes and a keyhole at the top Cross arm brackets shall accommodate a 102 by 102 mm 4 by 4 inch cross arm Soa Wire Connections 3247254 Wire Splicing kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkk NOTE In water tanks split bolts are used above the water line only because working space is limited and the hydraulic or mechanical compression tools may be cumbersome and hazardous to use since a single split bolt will work loose when the wires it connects are moved a minimum of two split bolts should be used At ground level or in trenches compression tools can be used conveniently and the swaged sleeve connection produced by such tools is more reliable than split bolts kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Connecting wire splicing shall be made with copper compression connectors or exothermic welds following instructions of the manufacturer Split bolt type connectors shall not be used 3 4 2 2 Steel Surfaces Connections to ferrous pipe metal tanks shall be made by exothermic weld methods as manufactured by an approved manufacturer for the type of pipe tank Electric arc welded conne
65. tribution shall be No 2 AWG stranded copper wire with type cathodic protection high molecular weight polyethylene Dular Halar insulation 2 2 4 Oil Immersed Enclosures kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk NOTE The enclosure should not be used in areas prone to flooding unless required for hazardous locations Provisions should be made for flooding kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkkk Enclosures shall be of 3 1 mm 11 gauge steel or heavier with an accessible drain plug The oil level shall be clearly marked The lid shall be hinged and have quick release clamps to secure it in closed position A stop shall limit the swing of the lid when opened A compressible oil resistant positive sealing gasket shall be provided The gasket shall return to its original shape upon release of lid pressure The gasket shall be attached to the tank or lid and joints shall be free of gaps Base mounting using 102 mm 4 inch high channels shall be provided Conduits entering the enclosure shall be internally sealed and shall enter or exit above the oil fill line Ziad COKE BREEZE Poel Calcined Petroleum Coke Breeze Dry Breeze shall conform to the following requirements Bie Se UL Electrical Resistivity Resistivity shall not exceed 1 milliohm meter 0 1 ohm cm Great Lake Carbon C 12 A Test Method Di

UFGS 26 42 17.00 10 Cathodic Protection System

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