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checkSTRESS User`s Manual

1. Improper changes were made to the Mapping Database Check the entries made carefully Node number lt Number gt is defined twice in the Neutral file Check the neutral file and proceed The node number specified above is defined two times e for the same node number X Y and Z coordinate values specified in two places in the Plant Design Neutral file User needs to check the neutral file The Node number exceeded 10000 Check the Start Node and Node Increment During rearrange of node number the new node is crossing 10000 which is not correct Please reduce the Start Node number and Node number Increment values and try again 57 Appendix H Release Notes on checkSTRESS Version 9 10 e Following piping codes are updated o ASME B31 1 2014 o ASME B31 3 2014 e New feature added to show and print Hanger Report e New feature added to transfer the model in ENGLISH units to checkSTRESS if the value of the attribute UNITS CO ORDS is defined as INCH in PCF file for checkSTRESSPCF checkSTRESS II PCF and checkSTRESS Nuke PCF e Product is now fully compatible with Windows 10 and Windows Server 2012 or later This version of product does not require Net Framework 1 0 to be installed and may require Net Framework 2 0 if the same is not already enabled in Windows Release Notes on checkSTRESS Version 9 00 e Following piping codes are updated o ASME B31 1 2012 o ASME B31 3 2012 o ASME B31 4
2. Sample Table MdetailE for English Units Fields in each table and their descriptions are given below in detail Fields in MaterialE Table Index Unique Material Id MatName Material Name Density Density of the Material in English units Nu Poisson Ratio JointFactor Joint Factor of the Material MaterialT ype Type of Material Tensile Tensile Strength CircFactor Circular Factor Yield Yield Strength 22 Sample Table MaterialE for English Units MatName Temperature E Alpha Allowable Yield Rupture Design Proof fh fCR A106 A Im 295E 07 6 08 06 12000 Al06 A 350 Dong 6 85 06 12000 A106 A 150 Dag 6 24E 06 12000 A106 A_ om Deg 6 35E 06 12000 Mone None Mone None None None Al06 B 300 Daag 6 88 06 15000 AIP 350 280 07 6 95E 06 15000 AIP 20 Dog 5 89 06 15000 AI06 B 100 Daag 6 14 06 15000 AIP 150 291E 07 6 24E 06 15000 None None None None None None Al06 B 250 Dog 6 62E 06 ie Fields in MDetailE Table MatName Material name Temperature Material Temperature E Young s Modulus Alpha Alpha value for material Allowable Allowable Loads Yield Yield Strength Rupture Rupture Stress Design Design Factor Proof Proof Stress fh Allowable Stress at Maximum Temperature fCR Allowable Creep Stress Material properties for six piping codes viz B31 1 B31 3 B31 4
3. can be effectively used to direct thermal growth towards expansion loops and to split thermal growth in a line such that the two piping portions grow in opposing directions Fig 3A shows the same problem as in Fig 2D with a 6 NB branch line added at the welding tee at node 70 i e from node 70 to node 240 The deformed geometry for thermal load is shown in Fig 3B where it is observed that the tee node 70 does not move up in Y direction Since the intermediate anchor at node 95 restraints the vertical riser between bend node 220 and tee node 70 from thermally growing upward towards node 70 this riser grows downward producing large bending moments and stresses at and around equipment nozzle at node 240 in addition since the upward growth of this vertical riser is effectively restrained at the tee node 70 due to presence of intermediate anchor at node 95 large localized thermal stress is generated at the welding tee This is observed in the thermal stress contour plot given in Fig 3C Fig 3D shows the same piping system with the intermediate anchor replaced by two axial restraints the axial restraint in the horizontal line at node 95 splits and directs its thermal growth towards the 4 NB and 8 NB loops and does permit the horizontal line to move up in Y direction at tee node 70 whereas the axial restraint at node 210 splits the thermal growth of the vertical riser between nodes 220 and 70 From the thermal deformation plot giv
4. zone in one or more areas of the piping system study the deformed shape provided by checkSTRESS for sustained load case in order to understand how the piping responds to its own deadweight Next identify pipe locations in the 3D model where the pipe can be vertically supported by the support types listed under Step 4 above Based on this input vertically support the piping such that sustained stresses do not exceed yellow zone This step may require the Designer to execute checkSTRESS on the system with several different locations for weight supports checkSTRESS automatically sizes variable spring hangers wherever such hangers were located in the 3D model In case resting steel supports are selected to provide vertical support for piping under sustained load it is to be made sure that piping continues to rest on such steel supports even during operating condition weight pressure thermal and does not lift off from these supports If pipe lifts up at any of these resting supports during operating condition then that support does not carry any pipe weight and hence will not serve its purpose Similarly at rod hanger locations the tendency of piping should be to deform downward for operating load case so that the rod hangers carry the pipe weight under tension On the other hand if pipe lifts up at any of the rod hangers then that rod hanger goes into compression thereby not carrying the weight of the piping during operating conditio
5. If pipe lifts up at any of the rod hangers resting supports during operating condition then that support does not carry any pipe weight and hence will not serve its purpose In Appendix F titled Sample Problems and Solutions using checkSTRESS a couple of sample layouts are presented to illustrate how piping can be supported by spring hangers and resting steel supports to comply with the code requirements for sustained loads Thermal Load also referred as Expansion Load It refers to the cyclic thermal expansion contraction of piping as the system goes from one thermal state to another thermal state for example from shut down to normal operations and then back to shut down If the piping system is not restrained in the thermal growth contraction directions for example in the axial direction of a straight pipe then for such cyclic thermal load the pipe expands contracts freely in this case no internal forces moments and resulting stresses and strains are generated in the piping If on the other hand the pipe is restrained in the directions it wants to thermally deform such as at equipment nozzles and pipe supports such constraint on free thermal deformation generates cyclic thermal stresses and strains throughout the system as the system goes from one thermal state to another When such calculated thermal stress ranges exceed the allowable thermal stress range specified by various internat
6. concerned piping system These possible locations for pipe supports once marked in the 3D plant model are automatically transferred to the input files of pipe stress software 3 The Designer transfers stress input files to the pipe stress engineers for mostly code compliant and fairly well supported piping systems Pipe stress engineers can then import these input files into their pipe stress software thereby avoiding recreation of stress models by pipe stress engineers and perform detailed analyses and stress report preparation 4 The Designer confirms the validity of the piping layout finalized with supports by submitting key results and relevant plots generated by checkSTRESS 1 4 Basic Pipe Stress Concepts for Piping Designers Piping systems experience different loadings categorized into three basic loading types listed below Sustained Load It mainly consists of internal pressure and dead weight Dead weight is from weight of pipes fittings components such as valves operating fluid test fluid insulation cladding lining etc Internal design operating pressure develops uniform circumferential stresses in the pipe wall based on which pipe wall thickness is determined during the process P amp ID stage of plant design such that failure by rupture is avoided In addition internal pressure develops axial stresses in the pipe wall These axial pressure stresses vary only with pressure pipe diameter and wall thicknes
7. Eh CheckStress Graphics D CheckStress MBF Condensate_00 res File View Options Window Help 5 EN File View Options Window Help 5 DI e Fig 5B Thermal Deformation Plot 51 Options Window Help 5 mE maa rl CheckStress SE Z SA D CheckStress MBF Condensate_O0 res OI File view Fig 5C Thermal Stress Contour Plot rl CheckStress Graphics D CheckStress MBF Condensate_01 res File View Options Window Help 5 EI Fig 5D Revised Layout with Node Numbers 52 E CheckStress Deflected shape Expansion 11 D CheckStress WMBF Condensate_01 res DER File View Options Window Help Fig 5E Thermal Deformation Plot for Revised Layout ri CheckStress SE SA D CheckStress MBF Condensate_01 res File View Options Window Help 5 8 Fig 5F Thermal Stress Contour Plot for Revised Layout 53 rl CheckStress SL SH D CheckStress MBF Condensate_01 res File View Options Window Help 5 i Fig 5G Sustained Stress Contour Plot for Revised Layout Options Window Help e E FI CheckStress Graphics D CheckStress WMBF Condensate_02 res File View Fig 5H Revised Layout with Resting Supports 54 FI CheckStress SL SH D CheckStress MBF Condensate_02 res File View Options Window Help 5 en CC Fig 5 Sustained Stress Contour Plot for Revised Layout with Resting Supports 55 Appendix G Errors and Descriptions
8. Friction co effiecient Type Note Gap and Friction co efficient is not enabled this time Please skip those fields while entering the values Example SKEW 1 0 0 707 1E11 R or SKEW 0 1 0 RIGID T Threaded Joint Threaded Joint can be assigned to nodes by specifying the following at support locations Syntax TJOINT User SIF User SIF can be assigned for a node by specifying the following at support locations in Plant design software Syntax UserSIF Value Example UserSIF 100 30 Appendix E Possible Restraints Types and Hangers Particulars Syntax Example Anchor Anchor ANC Stiffness Gap ANC or ANC 1E12 0 0 or ANC 1E12 Double Acting Translational Restraints A X Stiffness Gap X or X 1E12 or X 1E12 25 Y Y Stiffness Gap Y or X 1E10 or Y R 50 Z Z Stiffness Gap Z or Z RIGID or X RIGID 35 Double Acting Rotational Restraints RX RX Stiffness Gap RX or RX 1E12 or RX 1E12 0 0 RY RY Stiffness Gap RY or RY R or RY 1E12 25 RZ RZ Stiffness Gap RZ or RZ RIGID or RZ R 50 Double Acting Snubbers XSNB XSNB Stiffness XSNB or XSNB 1E12 YSNB YSNB Stiffness YSNB or YSNB R ZSNB ZSNB Stiffness ZSNB or ZSNB RIGID Skewed Snubbers SKEW VecxX VecY VecZ Stiffness SKEW 0 707 0 0 0 707 1e12 or SKEW 0 0 0 707 RIGID Single Acting Translational Restraints Restraint Type Stiffness Gap Fr
9. Mapping DB obtained above and transfers the same to checkSTRESS Material DB Modification Creation User is allowed to create their own material table and can use the same by modifying adding the name of Material Mapping DB file name in table code of Codedb mdb supplied along with this software This table contains four fields viz PdCode KpCode KpMat and KpSect The first field PdCode contains the name of Piping Codes that can be specified in 3D Plant Design Software The second field KpCode contains the name of Piping Codes that are available in checkSTRESS corresponding to Analysis Code defined in 3D Plant Design Software Third field KpMat defines the name of the Material DB file to be used to get the CAEPIPE Material property during transfer Fourth field KpSect defines the name of the Schedule Table to be used to extract OD and Thickness if not available in the Neutral file for an element during transfer Please note the Material DB must exist before it is used in the Codedb mdb The procedure for creating a Material DB and modifying the Codedb mdb is listed below a Copy the existing file B311 mdb and rename the file with a desired name by pasting it to the directory where the source file was stored b The newly created DB contains four tables viz MaterialE MaterialS MdetailE and MdetailS The MaterialE and MdetailE table in the DB are used to define material properties in English units wher
10. Model is Y Fortunately the values entered available in the field 1 of tables Zvertical and Yvertical are kept identical because most Plant Design software always consider the vertical direction as Z axis On the other hand pipe stress engineers in different parts of the world use either Z axis as vertical or Y axis as Vertical So the values entered in the field KpSupport are different for Zvertical and Yvertical Program always uses the value entered in the field KpSupport corresponding to the value entered in field PdSupport for its stress model file generations User can modify the values available in the field PdSupport of tables Zvertical and Yvertical to suit their requirements It is recommended to keep the values entered in the filed PDSupport of tables Zvertical and Yvertical identical as much as possible This will help to avoid the user in reentering changing the values at support locations for different Global Vertical Axis In case the CAEPIPE support information corresponding to the attribute value entered in the Plant Design is not available defined in the mapping DB then the translator skips that support at the location Without using mapping DB Using this option user can define the support conditions boundary conditions in checkSTRESS equivalent to the Physical Support configurations from Plant Design software In such cases the mapping
11. and the pumps at nodes 180 and 250 From the thermal deformation plot for this revised layout shown in Fig 5E it is observed that the two pump suction lines from the suction nozzles to the welding tee at node 111 have almost equal thermal growth in the Z direction thereby moving the branch pipe between nodes 111 and 300 as a rigid stick resulting in low thermal stresses in that branch pipe as seen in Fig 5F In addition it is observed that the pump suction lines from the bend node 100 to the pump suction nozzles thermally grow in the Z direction whereas the pipe from the tank node 10 to the bend node 90 grow in the Z direction this opposing deflections rotate the inter connecting pipe between nodes 90 and 100 like a see saw in the horizontal XZ plane resulting in low thermal stresses in this region as observed in Fig 5F Although the thermal stress criteria have been met the weight stresses exceed the sustained stress allowable as illustrated by many red and orange areas in the sustained stress contour plot given in Fig 5G This is because there are no vertical supports excluding the 3 nozzles and a variable spring hanger at node 52 to carry the weight of the system Now vertical resting supports are introduced as shown in Fig 5H and the corresponding sustained stress i e weight pressure contour plot with most areas in blue shown in Fo DI confirms that the sustained stresses are well below the allowable values 50
12. blue region denotes areas with the least stress ratios where stress ratio equals to actual computed stress divided by allowable thermal stress green region with higher stress ratios yellow region with even higher stress ratios and red region with the highest stress ratios Intermediate areas between these distinct colors will be of bluish green greenish yellow and orange colors Since thermal stresses generated are directly dependent on how flexible the layout is it may be necessary to make the layout as flexible as possible by including bends offsets loops etc to reduce thermal stresses So the Designer s goal is to arrive at a flexible layout for which thermal stress ratios remain within blue to yellow range and not get into orange and red zones For a more flexible layout even yellow zone may be avoided That would leave even more thermal margin for stress engineers to meet other pipe stress criteria not considered under checkSTRESS Step 3 Finalizing Layout to meet Thermal Stress criteria In case thermal stress ratios exceed yellow zone e orange and red zones appear in one or more areas of the piping system it is important to study the deformed shape for thermal load case in order to understand how the piping deforms for pure thermal load where only temperature change is considered By studying such defor
13. for single user and 5 Locating the server automatically in a large network environment is a time consuming process The procedure for setting the Environmental Variable SSTLM in the client machine under different operating systems is listed below Windows 2000 Server Professional Edition Windows XP Personal and Professional Open the Control Panel window through Start Menu gt Settings gt Control Panel Double click on SYSTEM icon as shown in left figure below Ei Control Panel ES zix File Edit View Favorites Tools Help Kal General Network Identification Hardware User Profiles AZ g KI si Ed he Back gt Asearch yFolders 4 R Di X Wes EJ Performance options control how applications use memory Address Control Panel Es Geo which affects the speed of your computer Controllers Extre Optioms Perf Opt Performance Options a Ste es onfe Y Iw K E A L O 8 r Environment Variables Environment variables tell your computer where to find certain Environment Variables Keyboard Licensing Mail Mouse Network and ES types of information Dial up Co 3 gt r Startup and Recovery Phone and Power Options Printers Regional Scanners and a 8 Startup and recovery options tell your computer how to start Modem Options Cameras p Bop p and what to do if an error causes your computer to stop Scheduled Sounds and E 7
14. the Single acting restraints to checkSTRESS Syntax Single Acting Restraint Type Stiffness lb in or N m Gaplin or mm Friction Coefficient Example For transferring the Single acting Translational Restraints in X direction enter the attribute of Plant Design Support location as X 1e10 35 0 25 X 1e10 25 0 25 Snubber Snubbers can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax Types of Snubber Stiffness lb in or N m Example YSNB 1E10 or ZSNB 1E6 Skewed Snubber Skewed Snubbers can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax SNB VecX VecY VecZ Stiffness lb in or N m Example Skewed Snubber with stiffness 1E 9 can be specified with directional vectors as follows SNB 0 707 0 0 707 1E9 29 Force Moment Force and Moments can be transferred from Plant Design to checkSTRESS by specifying the following at support locations Syntax FORCE Fx Fy Fz Ib or NJ MOMENT Mx My Mz Ib in or Nm Example 1000N Force acting in Y direction can be specified as follows FORCE 0 1000 0 500Nm Moment acting in Z direction can be specified as follows MOMENT 0 0 500 Skewed Restraint Skewed Restraints can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax SKEW VecX VecY VecZ Stiffness lb in or N m Gap in or mm
15. the window changes depending upon the product and its module you buy For e g If you buy the product checkSTRESS and its module checkSTRESSPDMS you will see the name checkSTRESS for Aveva s PDMS on the top left corner of the window Click on Install SST License Manager option You will be shown window similar to that shown in the figure right below i gt CheckStress SST Systems Inc fe SST License Manager cl EH SE AMAN Welcome to the SST License Manager Setup Wizard e The installer will guide you through the steps required to install SST License Manager on your computer WARNING This computer program is protected by copyright law and international treaties Unauthorized duplication or distribution of this program or any portion of it may result in severe civil or criminal penalties and will be prosecuted to the maximum extent possible under the law F Web w a Follow the instructions as they appear on the screen 2 3 Manually Registering and Configuring the Windows Service for SST License Manager The SST License Manager Setup program will register and start the service automatically when you perform step 2 2 If the setup program fails to register the service automatically then register the service manually as stated below After the successful installation of the SST License Manager launch the program Manage License exe by selecting Start Menu gt Programs gt SST License Manger g
16. 010 Since then a number of enhancements have been added 1 2 checkSTRESS Modules The preliminary visual pipe stress check software checkSTRESS is an add on product to e 3D Plant Design software PDMS PDS and CADMATIC e 3D Plant Design software that generate PCF files from the plant database such as SmartPlant 3D AutoCAD Plant 3D CATIA CADWORX etc The checkSTRESS product performs preliminary visual pipe stress check as follows e Reads the following from the plant database PCF files of 3D Plant Design software Piping geometry pipe sections and material properties Temperature pressure and weight of pipe fittings Thermal anchor movements at equipment nozzles Pipe support details to create the corresponding hangers guides etc in checkSTRESS Allowable loads at equipment nozzles e Enables piping code compliance by displaying stress ratio contour plots for Sustained weight pressure Expansion and Occasional load cases e Assists in locating hangers and supports by showing deflected shapes for Sustained Operating Expansion and Occasional load cases Even sizes variable spring hangers e Generates input files for one or more of the widely accepted pipe stress software CAEPIPE CAESAR II and PIPESTRESS which is mostly used for nuclear piping analyses e Prints key results such as 10 highest stress ratios and their locations equipment nozzle load compliance with allowable loads spring hanger report active
17. 2 7686 0 75 20 26 67 2 8702 1 25 33 401 3 3782 1 25 32 42 164 3 556 1 5 40 48 26 3 683 2 50 60 325 3 9116 Fields in standard schedule table and their descriptions are given below in detail NPD_E Nominal Piping Diameter in Inches NPD_M Nominal Piping Diameter in Millimeters OD Outside Diameter in mm THK Wall thickness in mm Warning Care should be taken while filling the fields of the Schedule DB as the wrong entry may lead to malfunction of the software 25 Appendix D Supports Support information Location and its type from Plant Design software can be transferred to checkSTRESS in two ways viz 1 With the use of mapping DB 2 Without using Mapping DB With the use of mapping DB The support details entered via attributes and its location specified in the Plant Design software are transferred to checkSTRESS The values of the attributes filled at support locations shall be in accordance with the values specified in the field 1 of tables Zvertical and Yvertical of SupportT ype mdb built into the application The values from field 1 of table Zvertical shall be referred and entered at the support locations via attributes if the Global Vertical Axis to be used in the Stress Model is Z On the other hand values from field 1 of table Yvertical shall be referred and entered at the support locations via attributes if the Global Vertical Axis to be used in the Stress
18. 2012 o ASME B31 5 2013 o ASME B31 8 2012 o EN 13480 2012 o ASME B31 9 2008 o CODETI 2006 e Hanger catalog COMET has been updated to include two new ranges V4 and V5 e USER DEFINED ALLOWABLE LOADS New feature added to define User Allowable Loads for Anchors and Nozzles through Misc gt User Allowables The allowables thus defined are compared against calculated loads and printed in Support Load Summary outputs If the calculated loads exceed the allowables they are highlighted in red e New feature added to read Thermal Anchor Movement TAM and Allowable Nozzle Loads defined in 3D Plant Design software Refer to checkSTRESSPCF pdf checkSTRESSPDMS paf checkSTRESSCADMATIC pdf for details e New feature added to print analysis summary Using this feature the following can be printed to a printer a PDF file a text file or a CSV comma separated values file a Model input data b Code compliance results for ten 10 highest stress node points c Anchor Nozzle Qualification Summary and d Status of Resting Supports Limit Stops e Bill of Quantities Weight amp Centre of Gravity and Table of Contents e Static seismic g load is included in all versions of checkSTRESS 58 Edit Layout Enhancements New feature added to calculate local shell stiffnesses for nozzles connected to spherical shells New feature added to calculate Angular Stiffness of Bellows when the Axial Stiffness and Mean Diameter of
19. B31 5 B31 8 and EN13480 are available in the DB i e B311 mdb and B313 mdb 23 Modification of Config ini File Material Mapping DB s and Support Mapping DB s are stored in the Application directory of the Product The customized Material Mapping DB s and Support Mapping DB s can be shared among the users of the product by copying these files in a shared location and modifying the config ini file to point to the new path For clarity config ini file contains the path of the Material Mapping DB s and Support Mapping DB s By default this will point to the application directory Copying these files to a shared location and modifying the path in the config ini to reflect the new location will help users to share the customized DB s The content of the file is listed below for reference Config Product Name checkSTRESS Product Type Server Version Materials_DB Code_DB Support_DB leaving the above fields empty will use the default path Assuming the Material Mapping DB s Code DB and Support DB are stored in the shared location DBS of machine InfoP025 modify the Materials DB Code_DB and Support_DB as follows Config Product Name checkSTRESS Product Type Server Version Materials_DB InfoP025 DBS Code_DB InfoP025 DBS Support_DB InfoP025 DBS leaving the above fields empty will use the default path Warning Care should be taken while entering the fields of the CodeDb mdb and th
20. Bellows are input Four digit year format is included in both Print and Print to file option New feature added to Copy and Paste rows with Element from Layout Material Section and Load properties This can be performed through Ctrl C and Ctrl V This new feature will also allow to Copy and Paste multiple rows of layout This can be performed through Layout Frame gt Edit gt Copy command Multiple rows of Copy and Paste is valid only for Layout and NOT for Materials Loads and Sections UNDO can now perform an UNDO operation 1024 times includes most user input actions through Layout List and Graphics windows REDO can now perform a REDO operation 1024 times includes most user input actions through Layout List and Graphics windows Length of the Material Name Section Name Load Name Beam Material Name Beam Section Name and Beam Load Name is increased to 5 from 3 New feature added to define Anchor and Specified displacements in the local coordinate system New feature added to change Occasional load factor k for EN13480 piping code available under Layout window gt Options gt Analysis gt Code gt EN13480 DIN Flange library is now included in CheckSTRESS New feature added to combine current PIPE BEND element with previous PIPE element New feature added to split an element into multiple segments New feature added to define Forces and Moments as part of Sustained Load Expansion Load T1 using Force Dialo
21. Click on Install checkSTRESS option and follow the instructions as they appear on the screen For sharing the license information client computer need to communicate with the server computer where the SST License Manger is installed The communication between the client computer and the server computer can be established by setting the Environmental Variable SSTLM on the client computers Please note the automated procedure for locating the server computer by the client computer for sharing license information is purposefully not given to avoid unnecessary clashes However the Environmental 9 variable is set automatically for the machine where SSTLM is installed In other words if you install the client program in the same machine where the SST License Manager is installed then there is no need to set the environmental variable SSTLM If the client program is installed other than the machine where SST License Manager is installed then follow the procedure listed below for setting the environmental variable under different operating systems 1 SST License Manager is used as a security system for all products and hence user can have different servers in the same network environment for different products Can have one server for various products installed in different client machines Can install both server client in one computer Can have two different servers for one product by splitting the number of users not applicable
22. DB will not be used for transferring the support information Refer the sections listed below for details on entering the support information in Plant Design software Hangers Hangers can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax Hanger Type of Hanger Number of Hangers Allowable Travel Limit in or mm Load Variation Short Range Example Hanger Spring Supports 2 20 1 Note Allowable Travel Limit option is not enabled at this time Please skip that field while entering the values 26 Rod Hanger Rod Hangers can also be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax Hanger ROD Number of Hangers Example Hanger ROD 1 Constant Support Constant Support can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax Hanger CONSTSUPPORT Number of Hangers Example Hanger CONSTSUPPORT 3 User Hanger User specified Hangers could also be transferred from Plant Design software to checkSTRESS by specifying the following at support locations Syntax USERHANGER Number of Hangers Spring Rate ib in or N m Cold Load Hot Load Example For example one number of user hanger with spring rate of 1E8N m and hot load 1000 can be specified as follows USERHANGER 1 1E8 1000 Guide Guide Restraint can be transferred from P
23. E Tasks Multimedia A Startup and Recovery Cancel Apply Select the tab Advanced and press the button Environmental Variables as shown in right figure above Provides system information and e a My Computer Click the button New under the User Variables as shown in figure below Type SSTLM under the variable name prompt and key in the name or IP Address of the computer where SST License Manager is installed for e g info025 or 192 0 0 4 under the value prompt Press the button OK to complete the setting 10 system Properties E 24x General Network Idartiicabor Hacer User Petter Advanced Ux User variables For karthick valio CAE aero TENP C Doourerts and Settings barthickiLoc Wo C Documents and SettingsikarthickiLoc Variable Name f SSTA Windows 7 0 or later Open the Control Panel window through Start Menu gt Control Panel as shown in left figure below __ AA O I Control Panel It System 49 Search Con eeng X REE ET AAN EA D Control Panel Home ge SE View basic information about your computer Pictures Device Manager Windows edition Ha Remote settings Windows 7 Professional System protection Copyright 2009 E Computer O Advanced Gs Microsoft Corporation All G nced system settings por y Control Panel Service Back Get more features with a Devices and Printers new edition of Windo
24. IF Value UserSIF 100 Note 1 Stiffness Gap and Friction Coefficient are optional values If not defined then it will be transferred as 1E12 Ib in i e RIGID 0 0 in and 0 0 respectively to checkSTRESS 2 For Sl units the Stiffness and Gap should be specified in N mm and mm respectively 3 The Hanger Type Number of hanger Allowable Travel Limit not applicable at this time Load variation and Short range are optional value If the above information are not defined then the program will assume the following a Hanger Type Hanger Type is selected Specified in the Plant Design to checkSTRESS form b Number of Hanger 1 c Allowable Travel Limit 0 00 not applicable at this time d Load Variation 25 e Short range 1 Use short range 32 For Sl units the Spring Rate Cold Load and Hot Load should be specified in N mm Kg and Kg respectively For defining more than one support at each support location use in between support definitions Hanger Types ABB PBS Fee 8 Mason Nordon Basic Engineers Flexider 30 60 120 NPS Industries Berger Paterson Flexider 50 100 200 Piping Services Bergen Paterson L Fronek Piping Tech amp Products BHEL Hyderabad Grinell Power Piping BHEL Trichy Hydra EN See Borrello Lisega Sanwa Tekki 85 170 Carpenter amp Paterson Mitsubishi 30 60 120 Sarathi Comet Mitsubishi 80 160 Sp
25. OPEAN flange library 60
26. This Appendix presents the list of errors their descriptions and the necessary actions to be taken 1 10 Invalid Entry Starting Node number should be a Numeric value Starting Node number specified is not a numeric value Please enter only numeric value Invalid Entry Node Increment should be a Numeric value Node Increment specified is not a numeric value Please enter only numeric value Invalid Entry Staring Node number should be lt 10000 Node number cannot be more than or equal to 10000 Please reenter the starting Number below 10000 Invalid Entry Node Increment should be lt 10000 Node Increment value is too high Node number cannot be more than or equal to 10000 Please reduce the Node Increment value Cannot determine product Contact Program vendor for details Some of the files required for the translator either moved or deleted Please reinstall the product or contact program vendor for details Cannot initialize application Contact Program vendor for details Contact program vendor immediately Invalid Data Type Expected Real Available String a When reading the Plant Design neutral file one of the field values in a line is expected to be Real number format But the field is filled with string format Translator unable to read that field so it will show an error message with a line number and Entire line Data and the above message User needs to check that particular field and modify
27. al Restraints to withstand Static Seismic g Load In case occasional stresses exceed yellow zone in one or more areas of the piping system study the deformed shape provided by checkSTRESS for occasional load case in order to understand how the piping responds to static seismic g load Next identify those weight support locations for example resting supports in the yellow to red zones where the pipe can also be laterally supported and replace those weight supports with integral 2 way vertical and lateral restraints such that occasional stresses do not exceed yellow zone This step may require the Designer to execute checkSTRESS on the system with several different locations for integral 2 way vertical and lateral restraints 5 Step 8 Meeting Allowable Loads at Nozzles Anchors After locating relevant supports a to minimize thermal stresses b to carry weight of the piping during operation and c to withstand static seismic g load the Designer should check the calculated loads at nozzles anchors in the Support Load Summary If the calculated loads at nozzles anchors exceed the corresponding Allowable Loads by studying the deformed shapes provided by checkSTRESS for different load cases it is possible to further modify the layout and or support scheme such that the calculated loads at nozzles anchors do not exceed the Allowable Loads As a minimum the above said Nozzle Load complia
28. ample Material DB B315 mdb eee eee cence ee eeee eset ee aeeeeeteaeeeeeeeaeeeeeseaeeeeeseaeeeeeseeeeeeseeeeeereneeaeess 22 Modification of Config ini File 24 Appendix Eutanasia 25 Schedule Table aii A A A A AA 25 Schedule Table Creation Modification ooonncccinndinnnnnnnnccnncccnnoncnnncrnnnnccnnnrnn nara nnn cnn rca rn 25 APpendiX D ANo n e E ee 26 Re 016 aE EPEE AEE E E E T E emcee e 26 With the use ol mapping DB eege a ais 26 Witho tusing mapping DB TTT 26 ee a a E E E T 31 Possible Restraints Types and Hangers cccecscceeeesneeeceeneeeeeeeaeeeeeeaaeeeeeeaaeeeeeeaeeeseeaeeesseaeeeeneaaes 31 Appendix Ao A amaaan anamiannan amanaia nanana aana 34 Sample Problems and Solutions using checkSTRESS occcccccccoccconoccnancccnancnnnonannnncnnnncn ran nn naar nn nancccns 34 ADPENdDOG vicio id 56 Errors a d Descriptions viciado 56 Appendix Mirian A 58 Release Notes on checkSTRESS Version 9 10 58 Release Notes on checkSTRESS Version 9 00 coocccccccccccocccononcnonannnoncnconnnnnnnnn nano cnn nc cra rana rre 58 1 0 Introduction 1 1 Why checkSTRESS It is common practice worldwide that piping designers layout personnel route pipes with consideration given mainly to space constraints process and flow constraints such as pressure drop and other requirements arising from constructability operability and reparability Unfortunately often pipe stress requirements are not sufficiently considered while routing and sup
29. and branch end A center From the section property weight of fluid kg lb is calculated and is added to the dry weight kg lb of Three Way valve read from 3D Plant Design database The total weight thus obtained is transferred to each rigid element in proportion to its length In the latter option the dry weight of Three Way valve is transferred as weight of the Concentrated Mass at the intersection of the three pipes 4 11 Cross Cross from 3D Plant Design software is transferred as four pipes connecting near end amp center far end amp center and two branch points amp center with Branch SIF Welding Tee at the pipes intersection in checkSTRESS OD and Thickness read from the 3D Pant Design database for this component are transferred to each pipe fields thus created as mentioned above 4 12 Four way Valve Four Way Valve from 3D Plant Design is transferred as Four Rigid Elements or Four Pipes with one Concentrated Mass at its Centre to checkSTRESS by connecting the near end amp center far end amp center and two branch ends amp center From the section property weight of fluid kg lb is calculated and is added to the dry weight kg lb of Four Way valve read from 3D Plant Design database The total weight thus obtained is transferred to each rigid element in proportion to its length In the latter option the dry weight of Four Way valve is transferred as weight of the Concentrated Mass at the intersection of the thre
30. as psi or bar for English SI units respectively Mass or Weight Ib or Kg Dry weight and Wet weight of components from Plant Design software are transferred as lb or Kg for English and SI Units respectively 17 Density Ib in3 or kg m3 Material Density Insulation Density and Fluid Density from Plant Design software are transferred as Ib in3 or Kg m3 for English and SI units respectively Translational Stiffness Ib in or N mm Translational stiffness from Plant Design software is transferred as bim or N mm for English and SI Units respectively to CAEPIPE Rotational Stiffness in lb deg or N m deg Rotational Stiffness from Plant Design software is transferred as Ib in deg or N m deg for English and SI Units respectively to checkSTRESS Force Ib or N Force values from Plant Design software is transferred as lb or N for English and SI Units respectively to checkSTRESS Moment ft lb or Nm Moment values from Plant Design software is transferred as ft lb or Nm for English and SI Units respectively to checkSTRESS 18 Appendix A 3D Plant Design to checkSTRESS Component Mapping All components available in Plant Design software are mapped with checkSTRESS component The details are tabulated below Type of Component in Type of Component in checkSTRESS Keywords used in Plant Design software Neutral File Pipe Pipe Pl Valve Valve VA Flange Rigid Element Pipe
31. ccessfully installed 2 6 2 Using Manage License Tool a b Run the program ManageLicense exe available in the installation directory of SSTLM Select Analyse Tool from the menu Tools for server version or select Analyse Tool available in the main menu of the InfoPlant product for standalone version From the dialog box as shown in figure below select the product from the Select Product combo box Select the check box Install or Repair Activation Key This enables the text box below the check box Paste the Activation Key in it and press the button Install Key On successful installation user gets a message Activation Key successfully installed 2 Analyse Tool Select Product Analyse Key M Install or Repair Activation Key Install Key Save License Delete License System Info Diagnose Save Report Clear Borrow License Close 2 7 Renewing Re Installing the License Follow the steps a through e listed in 2 6 2 above to renew re install the license Activation Key Refer SST License Manager User s manual for more details or Select the Option Help gt Renew Reinstall Activation Key 13 3 0 Limitations Limitations defined in this Chapter are generic in nature and is not specific to any Plant Design application software Limitations specific to each Plant Design application is listed in the corresponding Readme fi
32. checkSTRESS User s Manual From the CAdvantagE Library checkSTRESS User s Manual Server Version 9 xx O 2015 SST Systems Inc All rights reserved Disclaimer Please read the following carefully This software and this document have been developed and checked for correctness and accuracy by SST Systems Inc and InfoPlant Technologies Pvt Ltd However no warranty expressed or implied is made by SST Systems Inc and InfoPlant Technologies Pvt Ltd as to the accuracy and correctness of this document or the functioning of the software and the accuracy and correctness Users must carry out all necessary tests to assure the proper functioning of the software and the applicability of its results checkSTRESS is a trademark of SST Systems Inc and InfoPlant Technologies Pvt Ltd For Technical queries contact SST Systems Inc Tel 408 452 8111 1798 Technology Drive Suite 236 RS E Fax 408 452 8388 San Jose California 95110 Email info sstusa com USA AECE www sstusa com InfoPlant Technologies Pvt Ltd Tel 91 80 40336999 7 Cresant Road Fax 91 80 41494967 Bangalore 560 001 InfoPlant Email iplantOvsnl com India www infoplantindia com Table of Contents WO gt Tee De d DEE 1 1 11 Why checkSTRESS uc o EE 1 1 2 checkSTRESS Module S a a a cnn carne 1 1 3 Benefits derived from checkSTRESS modules 2 1 4 Basic Pipe Stress Concepts for Piping Designers cococcccnnnnconoconoccccnonnnnnonnnnnann c
33. e Material Mapping DB as the wrong entry or leaving the field empty may lead to malfunction of the software 24 Appendix C Schedule Table The table code in Codedb mdb contains a field named KpSect to specify the schedule to be used during transfer In case of unavailability of OD and or thickness values in transfer file translator reads the OD and or thickness from the standard schedule table and transfers the same to checkSTRESS In case the value of the field KpSect is not defined or left empty in the table then the program will use the Standard Schedule STD for ANSI standard by default Schedule Table Creation Modification The procedure for creating the user defined Standard Schedule Table is listed below 1 Copy the table STDsch and then paste it as new table in the same Codedb mdb by specifying a new name for the table Modify the contents of the table with the new values Open the table Code and then enter the KpSect field with the name of the table created above corresponding to the PdCode For e g assuming the name of the new Standard Schedule table created as Sch40 corresponding to B31 1 PdCode change the value of field STDsch as Sch40 PdCode KpCode kpMat Kpsect 631 1 B311 B311 STDsch Sample Schedule Table NPD_E NPD_M op THK 0 125 f 10 287 1 7272 0 25 8 13 716 2 2352 0 375 10 17 145 2 3114 05 bs 21 336
34. e negligible restraint to thermal movement from cold to hot condition and vice versa The thermal stress and sustained stress contour plots given in Fig 4F and Fig 4G confirm that the piping system with hangers is code complaint for both sustained and thermal load cases E CheckStress Graphics D CheckStress MBF WeightSupports_O00 res File View Options Window Help DEI AAAA o Fig 4A Layout with Node Numbers 46 Options Window Help 6 E FI CheckStress SE Z SA D CheckStress MBF WeightSupports_00 res File View Fig 4B Thermal Stress Contour Plot Fig 4C Sustained Load Deflected Shape 47 FI CheckStress SL SH D CheckStress MBF WeightSupports_00 res File View Options Window Help Fig 4D Sustained Stress Contour Plot Fl CheckStress Graphics D CheckStress MBF WeightSupports_01 res File View Options Window Help Fig 4E Layout with Hangers 48 FI CheckStress SE Z SA D WCheckStressIMBFWeightSupports_01 res File view Options Window Help Fig 4F Thermal Stress Contour Plot for Layout with Hangers ei CheckStress SL SH D CheckStress MBF WeightSupports_01 res File View Options Window Help o 8 Fig 4G Sustained Stress Contour Plot for Layout with Hangers 49 Sample 5 Condensate_00 01 and 02 This practical problem illustrates how to place resting steel supports to carry the weight of the system with operating flu
35. e node at the pipe end in checkSTRESS with flange type as Weld Neck The OD and Thickness in or mm corresponding to Flange Nominal Size is transferred to pipe in checkSTRESS Dry weight of flange is 15 read from 3D Plant Design database and the same is transferred to Weight field of the Flange Data Type in checkSTRESS On the other hand If the user selects Rigid element option during run time then the program will transfer the same as Rigid Element to checkSTRESS Dry weight of flange is read from 3D Plant Design database and the same is transferred to Weight field of the Rigid Element in checkSTRESS 4 8 Olet Olet from 3D Plant Design software is transferred as Pipe to checkSTRESS with a Branch SIF defined at the intersection e where the branch pipe intersect the main run of the pipe 4 9 Tee Tee from 3D Plant Design software is transferred as three pipes connecting the near end center far end amp center and branch point amp center with a Branch SIF Welding Tee specified at the center point of the Tee OD and Thickness read from the 3D Pant Design database for this component is transferred to each checkSTRESS pipe fields thus created as mentioned above 4 10 Three Way Valve Three Way Valve from 3D Plant Design is transferred as Three Rigid Elements or Three Pipes with one Concentrated Mass at its Centre to checkSTRESS by connecting the near end amp center far end amp center
36. e pipes 4 13 Material Material name from Plant Design software is mapped to get the corresponding checkSTRESS material and then transferred to checkSTRESS Refer Appendix B for details User can also add modify the Material properties in checkSTRESS through Edit Layout gt Misc gt Materials 16 4 14 Support Support information Location and its type from Plant Design software can be transferred to checkSTRESS in two ways viz a With the use of mapping DB and b Without using Mapping DB Refer Appendix D for details 4 15 Thermal Anchor Movement TAM Thermal Anchor Movement TAM values entered in global X Y and Z directions at Equipment Nozzle where the piping layout selected for checkSTRESS is connecting to These values thus entered can be transferred to checkSTRESS TAM values should be defined in mm for Sl units and in Inch for English units If the TAM values are not available entered in 3D Plant Design software at Equipment Nozzle then they can be entered into checkSTRESS through Edit Layout option i e Click Edit Layout then select Anchor and select Edit data through Layout gt Edit From the dialog box shown click on Specified Displacement and enter the TAM values 4 16 User defined Equipment Nozzle Allowable Loads Equipment Nozzle Allowable Loads forces and moments provided by the equipment manufacturer or calculated using Applicable codes Finite Element Methods can be entered in
37. eas MaterialS and MdetailS tables are used to define the material properties in Metric units c Enter the Plant Design Material description available in 3D Plant Design Database into the field MatName of MaterialE MaterialS table and enter the engineering property of the material such as Density Nu Joint factor etc depending upon the availability of the information in the code selected and leave the rest of the fields as None For example the fields Tensile CircFactor and Yield is not valid for B31 1 and hence it should left as None d Enter the Temperature related property such as Young s Modulus Alpha Allowable etc into MDetailE MdetaiS table by expanding it using the button Fill the fields that are relevant to the Material Code selected and leave the rest as None e Modify the contents of each table with new values and save the DB Fill the table fields with the appropriate values available depending upon the type of piping code Other fields can be left as None f After successful creation of material Mapping DB as explained above in steps a to e open the DB codedb mdb and enter the name of the Material DB file thus created above in the field KpMat For example if you have created your own material Mapping DB file corresponding to B31 5 as B315 mdb then enter the name of the file B315 mdb in the field KpMat as B315 where the value of the field PdCode is
38. een the Near Far end of the bend and Tangent Intersection Point divided by Tan 0 2 Where is the included angle of the bend The value thus obtained above shall be written to bend radius field in checkSTRESS 4 4 Valve Valve from 3D Plant Design software is transferred as Valve to checkSTRESS Dry weight of valve without Fluid weight Ib or kg is read from 3D Plant Design Database and transferred to Weight field of checkSTRESS Valve element 4 5 Reducer Reducer Concentric and Eccentric from 3D Plant Design software is transferred as Reducer to checkSTRESS The OD in or mm and Thickness in or mm obtained from the Arrive position shall be written to OD1 and THK1 fields of checkSTRESS On the other hand the OD and Thickness obtained from the Leave position shall be transferred to DD2 and THK fields in checkSTRESS 4 6 Instrument Instruments from 3D Plant Design software are transferred as Rigid element to checkSTRESS Dry weight lb or kg of Instrument is read from 3D Plant Design database and the same is transferred to Weight field of the rigid element in checkSTRESS 4 7 Flange Flange from 3D Plant Design software can be transferred as Pipe with Flange or Rigid element to checkSTRESS If the user selects Pipe with Flange option from checkSTRESS dialog during run time then the program creates a pipe for a length equivalent to length of flange and creates a Flang
39. en in Fig 3E it is observed that such that much less forces and moments and hence stresses would be generated at the equipment nozzle node 240 and welding tee node 70 Fig 3F and Fig 3G show the thermal stress and sustained stress in this case sustained stress is due to only deadweight as pressure is zero contour plots confirming code compliant system for both loading cases rl CheckStress Graphics D CheckStress MBF AxialSupport_00 res File View Options Window Help DEI AAA o Fig 3A Layout with Intermediate Anchor at Node 95 42 File View Options Window Help S 2 BO 1092 0 Fl CheckStress Deflected shape Expansion 11 D CheckStress MBF AxialSupport_00 r Ob File View Options Window Help sm Fig 3C Thermal Stress Contour Plot 43 Options Window Help 5 EN rl CheckStress Graphics D CheckStress MBF AxialSupport_01 res File View File View Options Window Help 5 D ARAQO Fig 3E Thermal Deformation Plot for Layout with Axial Restraints 44 FI CheckStress SE Z SA D CheckStress MBF AxialSupport_01 res Eile View Options Window Help Fig 3F Thermal Stress Contour Plot for Layout with Axial Restraints rl CheckStress SL SH D CheckStress MBF AxialSupport_01 res File View Options Window Help 5 1 E 52822 O Fig 3G Sustained Stress Contour Plot for Layout with Axial Restraints 45 Sample 4 WeightSupports 00 and 01 This pr
40. equal to B31 5 and then enter the corresponding checkSTRESS 20 Section details table name in the field KpSect A sample Code mapping DB with Material DB is given below for reference Sample Code DB PdCode 1 KpCode kpMat Kpsect B311 Jeu STDsch Fields in Code DB Table PdCode Name of the Piping Code than can be specified in Plant Design Software KpCode Analysis code corresponding to Plant Design Code KpMat Material DB name from where the material details are specified KpSect Section DB name from where the Schedule details are specified 21 Sample Material DB B315 mdb Sample Table MaterialE for English Units Index Mattams Density Nu JointFactor MaterialType Tensile CircFactor Yield CL iassa fas fosa jes None None None CL EE 283 fos CS ene None ES aja a loza fogs cs None None ene alAtoe B 0220 josji jes None None Mone CL Blaise o23 fos cs Nome None None GL GAPISLA 0299 n cs None None one zaps 0220 0 31 CS None None None HATE 025 D31_ 145 Noe None None As2TPsO4L e josj AS None None None Iesse Moz oahi es None None None GL 11 CopperB42 Annealed 0283 fosfit CA None None None CL 12 CopperB42 Drawn Je n Ter None None None GL 13 RedBrass B43_ o283 oan Ice None None None GL 14 Aluminum B241 A96061T6 0 283 oz e None None None Cl tB Aluminum B241 A9606376 0 283 fo3 1__ Je None None None
41. g New feature added to Find and Replace Element Data types Materials Sections Loads This can be performed through Edit gt Find and Replace or using Ctrl H Improved title description for graphical plot of Stresses Stress Ratios and Deflected shapes New feature added to Find and Repeat Find text inside comments This can be performed through View gt Find Text Ctrl Shift F Repeat Find can be performed by pressing Ctrl F3 Double clicking on a comment row will allow the user to edit copy paste strings from Windows clipboard New feature added for redefining a model s vertical axis without affecting the layout of the piping system Redefining a model s vertical axis will automatically redefine elements data types seismic G factors New feature added to show stress units in color coded stresses plot Double clicking the left mouse button on any area inside the Graphics window redefines that area as the center point of graphical display New buttons added to define direction of Limit Stop and Skewed Restraint in Axial Shear y and Shear z directions of piping while inputting Mouse Scroll Button Up and Down will Zoom In and Zoom Out the graphics New feature added to toggle lists Ctrl Left Arrow key for Previous List and Ctrl Right Arrow key for Next List 59 e checkSTRESS now updated to have Node numbers up to 99 999 from the current 9 999 e New option added to include single weight of flange from ANSI and EUR
42. global X Y and Z directions at Equipment Nozzle where the piping layout is connecting to These values thus entered at the Equipment Nozzle of the 3D Plant Design software can be transferred to checkSTRESS Please note the force values should be entered in Ib for English units and in N for SI units Similarly the moment values should be entered in ft lb for English units and in Nm for SI units If allowable loads values are not entered available in the 3D Plant Design software then these values can also be entered through Edit Layout gt Misc gt User Allowables The allowables thus defined are compared against calculated loads and shown printed in Support Load Summary outputs can be viewed printed through Show Summary option If the calculated loads exceed the allowables they are highlighted in red 4 17 Units This section describes the units of measurement used to transfer the information from 3D Plant Design software to checkSTRESS Length Inches or mm Length related dimensions such as OD Wall thickness Insulation thickness Bend radius and Nominal Size from 3D Plant Design software are transferred as Inches or mm for English and SI units respectively Temperature Deg F or Deg C Temperature from Plant Design software is transferred as Deg F or Deg C for English SI units respectively Pressure entered as psi or kg cm2 in Plant Design Pressure from Plant Design software is transferred
43. ication and the practices followed in Plant Design Piping catalogue and specifications and the user has used Plant Design Software to generate the piping by using available facilities in Plant Design Software The working sequence of the software is listed below 1 The pipe branches modeled in the Plant Design Software are read and passed onto checkSTRESS 2 checkSTRESS then from the material mapping database see Note 1 provided with checkSTRESS identifies valid materials which will be used for first level pipe stress calculations within checkSTRESS that would correspond to the material specifications given for those branches in the Plant Design Software This executable finally carries out stress analysis and displays contour plots of Stress ratios for Sustained and Expansion cases It also plots graphically the deflected shapes for Sustained Expansion and Operating load cases 3 Finally this software has a provision to write CAEPIPE 5 xx mod file which is used for carrying out detailed stress analysis and stress report preparation using CAEPIPE See Note 2 below The sequence of checkSTRESS operation is shown diagrammatically in Figure 1 1 Plant Design Software Material and Support checkSTRESS Mapping Database DB see Note 1 Stress Deflection Anchor Nozzle Print Analysis Stress Input file Plots Status of Qualification Summary Resting Support amp Hanger report Figure 1 1 Note 1 Refe
44. iction X 1E10 35 0 35 or taney Co efficient X RIGID 25 Restraint Type Stiffness Gap Friction Y R 50 0 2 or E Co efficient Y 15 0 28 ZandZ Restraint Type Stiffness Gap Friction Z 45 or Z RIGID 0 26 or y Co efficient Z 25 Double Acting Limit Stops LIM LIM Stiffness Gap Friction Co efficient Xcomp Ycomp Zcomp LIM 1E12 30 0 1 0 or LIM RIGID 50 0 4 0 707 0 707 0 Skewed Restraints Skewed Restraints Skew VecX VecY VecZ Stif ness Gap Friction coefficient Type of Restraint Skew 0 707 0 707 0 0 1E12 R 31 Guide GUI GUI Stiffness Gap Friction Co efficient GUI or GUI 1E12 or GUI R 50 or GUI RIGID 25 0 25 Spring Hangers Hanger Hanger Type No of Hangers All Travel Limit Load Variation Short Range Hanger or Hanger Grinnell 1 or Hanger Grinnell 1 25 or Hanger Grinnell 1 25 1 Constant Support Hanger Hanger CONSTSUPPORT No of Hangers Hanger CONSTSUPPORT or Hanger CONSTSUPPORT 2 Rod Hanger Hanger ROD No of Hangers Hanger ROD or Hanger ROD 1 User Hangers User Hangers UserHanger Spring Rate No of Hangers Cold Load Hot Load UserHanger 200 1 1131 or UserHanger 200 1 0 0 1088 Force Moment Force Force Fx Fy Fz Force 1200 800 0 0 Moment Moment Mx My Mz Moment 0 500 250 Threaded Joint Threaded Joint TJOINT TJOINT User SIF User SIF UserS
45. id as well as to modify the layout in order to re direct thermal growth to comply with code stress requirements Fig 5A shows the initial layout where condensate from a tank is extracted by the pump suction lines When one pump is operating the other one is 100 standby It is observed from the Fig 5B that the pipeline from node 10 to node 100 thermally grows in the Z direction whereas the two pump suction lines one from node 120 to node 180 and the other from node 110 to node 250 thermally grow in the Z direction So the straight pipe between nodes 100 and 120 with a welding tee at node 110 experiences two opposing deflection patterns The pipe portion between nodes 110 and 120 is being deflected in the Z direction like a rigid stick on the other hand the portion between nodes 100 and 110 is being bent at tee node 110 as the node 100 deflects in Z direction This deflection response in turn produces high strains and thermal stresses locally at the tee node 110 as shown in Fig 5C In order to reduce the high local thermal stresses at node 110 we cut the straight pipe between nodes 100 and 120 into two parts one part is the pipe from node 100 to node 110 and the second part is from node 110 to node 120 We then shifted the second part downstream towards the two pumps resulting in the modified layout shown in Fig 5D Fortunately this shift of pipe downstream would not adversely increase the pressure drop between the tank at node 10
46. inactive status of resting supports during operation Bill of Materials Weight and Center of Gravity and Table of Contents Currently the following 3 modules of checkSTRESS are available for license checkSTRESS generates stress input files only for CAEPIPE checkSTRESS Il generates stress input files for CAEPIPE and CAESAR II checkSTRESS Nuke generates stress input files for CAEPIPE and PIPESTRESS Excepting the generation of stress input files the 3 checkSTRESS modules available for each of the 3D Plant Design software listed above have identical features Only checkSTRESS Nuke has an additional feature of displaying animated mode shapes along with natural frequencies computed 1 3 Benefits derived from checkSTRESS modules 1 During 3D layout stage the Designer arrives at flexible pipe routing with even supports including spring hanger sizes to meet the following stress criteria a Comply with Thermal Stress Sustained Stress and Occasional Stress requirements of Piping Codes ASME B31 1 ASME B31 3 ASME B31 4 ASME B31 5 ASME B31 8 ASME B31 9 ASME Sec Ill Class 2 BS 806 Norwegian RCC M Stoomwezen CODETI Swedish Z183 Z184 and EN 13480 b Meet the Allowable Nozzle Loads at Equipment Nozzles Anchors 2 During 3D layout stage the Designer identifies all possible locations for pipe supports as the 3D plant model contains all supporting objects such as steel and concrete structures adjacent to the
47. ing 2 additional bends at nodes 14 and 18 thereby making the layout more flexible So thermal growth of X directional pipes between nodes 10 and 14 and then between 18 and 20 as well as the growth of Z directional pipe between nodes 30 and 20 are absorbed by the 3 bends at nodes 14 18 and 20 The corresponding stress contour plots for thermal and sustained load cases are shown in Fig 1E and Fig 1F confirming code compliance E CheckStress Graphics D CheckStress MBF Loop_00 res DER File View Options Window Help 6 E Fig 1A Layout with Node Numbers 34 Options Window Help mak e E Fl CheckStress Deflected shape Expansion 11 D CheckStress MBF Loop_00 res File view Fig 1B Thermal Deformation Plot ri CheckStress SE SA D CheckStress MBF Loop_00 res File View Options Window Help 2 DEI ac CO O Fig 1C Thermal Stress Contour Plot 35 Options Window Help JAAA O FE CheckStress Graphics D CheckStress MBF Loop_01 res File View 5 EN Fig 1D Revised Layout with Node Numbers H CheckStress SE SA D CheckStress MBF Loop_01 res File View Options Window 5E Fig 1E Thermal Stress Contour Plot 36 rl CheckStress SL SH D CheckStress MBF Loop_01 File View Options Window Help 5 i Fig 1F Sustained Stress Contour Plot 37 Sample 2 IntermediateAnchor 00 and 01 This system shown in Fig 2A is made of 3 pipe
48. ional piping codes then the system is susceptible to failure by fatigue So in order to avoid fatigue failure due to cyclic thermal loads the piping system should be made flexible and not stiff This is normally accomplished as follows a Introduce bends elbows in the layout as bends elbows ovalize when bent by end moments which increases piping flexibility b Introduce as much offsets as possible between equipment nozzles which are normally modeled as anchors in pipe stress analysis For example if two equipment nozzles which are to be connected by a pipeline are in line then the straight pipe connecting these nozzles is very stiff If on the other hand the two equipment are located with an offset then their nozzles will have to be connected by an L shaped pipeline which includes a bend elbow such L shaped pipeline is much more flexible than the straight pipeline mentioned above c Introduce expansion loops with each loop consisting of four bends elbows to absorb thermal growth contraction d Lastly introduce expansion joints such as bellows slip joints etc if warranted In addition to generating thermal stress ranges in the piping system cyclic thermal loads impose loads on static and rotating equipment nozzles By following one or more of the steps from a to d above and steps e and f listed below such nozzle loads can be reduced e Introduce axial restrain
49. lant Design software to checkSTRESS by specifying the following at support locations Syntax GUI Stiffness ib in or N m Gap in or mm Friction Coefficient Example Guide with Rigid stiffness 50mm gap between guide and pipe and 0 3 friction coefficient can be specified as follows GUI R 50 0 3 Skewed Restraints Skewed restraint s with different directional vectors can be transferred from Plant Design software to checkSTRESS by specifying vector details with the following at support locations Syntax SKEW VecX VecY VecZ Stiffness ib in or N m Gap in or mm Friction Coefficient Type 27 Example SKEW 0 707 0 707 0 707 1E10 R Note Gap and Friction Coefficient options are not enabled at this time Please skip those fields while entering the values Double acting Translational Restraints Double acting Translational restraint s can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations If Double acting Translational restraint s are specified with Stiffness and Gap then transferred as Anchor data type with stiffness specified in that restraint will be assigned to corresponding translational stiffness to the Anchor and Gap specified in that restraint will be assigned to corresponding translational Displacement to the Anchor If Double acting Translational restraint s are specified without Stiffness and Gap then transferred as Restraint Data type Syntax T
50. le paf supplied along with the checkSTRESS software for that Plant Design application The present version of the checkSTRESS has the following limitations 3 1 3 2 3 3 In Case of unavailability of checkSTRESS material detail corresponding to Plant Design material description available in the neutral file then program takes the Material information specified in the first row of the material Mapping DB selected during transfer to checkSTRESS Refer Appendix B for more details User can also modify the Material properties in checkSTRESS through Edit Layout gt Misc gt Materials If OD outer diameter or Thickness Wall thickness for an element is not available in the neutral file then OD and Thickness shall be extracted from the Mapping DB corresponding to the specified Nominal Size for that element Note Thickness corresponding to Standard Schedule ANSI is entered in the Mapping DB and supplied with the standard product User can change these values to suit their project requirement if necessary Refer Appendix C for more details In addition to the above user can modify the OD and Thickness of a component through Edit Layout gt Misc gt Sections The following items are currently not transferred from Plant Design to checkSTRESS at this time However user can add these items in checkSTRESS through Edit Layout gt Misc gt Sections a Corrosion allowance and Mill tolerance of the piping section and b Lining Densi
51. les Common FileslAutodes Y Environment Variables 1 New Ile JI a si zen 8 k 11 Type SSTLM under the variable name prompt and key in the Name or IP Address of the computer where SST License Manager is installed for e g info025 or 192 0 0 4 under the value prompt of User variables or System variables Press the button OK to complete the setting 2 5 Product Key Generation Before generating the Product Key user has to make sure that the following requirements are met 1 Ethernet card installed with proper driver files 2 Static TCP IP assigned to the server machine H your machine where SSTLM is installed is configured to obtain the IP Address automatically from a DHCP server then user can disable the feature of checking the IP Address by SSTLM by defining an environmental variable with name SKIPIP and setting its value as YES This feature can also be used when a product is installed in a Laptop that is being used in a different network environment with different TCP IP address 3 Network cable plugged and connected to the network Please note if you generate a Product Key without connecting to a network network cable unplugged then the license issued for that Product Key could not be used when the network cable is plugged in On the other hand the license issued for the Product Key generated with network cable plugged in can be used in unplug mode too Hence it is alwa
52. med shape it is possible to arrive at a layout with appropriate bends offsets and loops and or with appropriately located axial restraints intermediate anchors such that thermal stress ratios do not exceed yellow zone This process may require the Designer to perform several iterations on layout and or locations for axial restraints intermediate anchors Step 4 Studying Results for Sustained Load After finalizing piping layout under Steps 2 and 3 for thermal loading the next task is to support the system vertically to carry its own deadweight under operating condition In this connection first review stress contour plot shown in color codes from blue to red as in Step 2 above for sustained stress ratios generated by deadweight and pressure for the system without any vertical supports excepting those provided by equipment nozzles and intermediate anchors introduced in Step 3 above The Designer s goal is to arrive at a vertical support scheme consisting of a resting steel supports b rod hangers c variable spring hangers and d constant support hangers at appropriate locations where such pipe supports can be attached to adjacent concrete steel structures platforms etc so that stress contour plot for sustained stress ratios avoids orange and red zones and remains within blue to yellow range Step 5 Finalizing Vertical Supports to carry Sustained Load In case sustained stresses exceed yellow
53. n Whether the pipe weight is being carried during operation by resting steel supports and or rod hangers both types are mathematically modeled as one way vertical Limit Stops in checkSTRESS or whether the pipe lifts up at those support locations is shown in the report titled Status of Limit Stops Operating Load The goal is to make sure the status is shown as Reached at all vertical Limit Stops for Operating Load case Step 6 Studying Results for Static Seismic g Load After arriving at a final layout with an acceptable pipe support scheme under Steps 2 to 5 for thermal and sustained loads the next task is to protect piping against large horizontal and vertical movements that could occur due to static seismic g load This can be accomplished by replacing some of the weight supports with integral 2 way vertical and lateral restraints In this regard review stress contour plot for occasional stresses generated by deadweight pressure and static seismic g load shown in color codes from blue to red as in Step 2 above The Designer s goal is to replace some of the weight supports for example resting supports located in the yellow to red zones with integral 2 way vertical and lateral supports so that stress contour plot for occasional stresses avoids orange and red zones and remains within blue to yellow range Step 7 Finalizing 2 way Vertical and Later
54. nce should be carried out for Operating Load case Any such changes made to the layout and or support scheme at this stage e at Step 8 should not adversely affect the stresses for thermal sustained and occasional load cases i e all the 3 stress contour plots should continue to avoid orange and red zones and remain within blue to yellow range This process may require the Designer to perform several iterations on layout and or support scheme Step 9 Key Results to confirm Validity of Layout with finalized Support Scheme Designers are to perform Step 1 to Step 8 for all relevant piping systems of the project Once the layout and support scheme are finalized for a system the Designer confirms the validity of that design by submitting key results generated by checkSTRESS as listed below a Ten 10 highest stress ratios and their locations b Equipment nozzle load compliance with allowable loads c Report listing spring sizes hot loads cold loads and travel for variable spring hangers sized by checkSTRESS d Status of Piping at resting supports during operation i e is the pipe resting on or lifting off a resting support e Bill of Materials f Weight and Center of Gravity g Table of Contents and h Relevant stress contour plots and deflected shapes Step 10 Export checkSTRESS models to Pipe Stress Software input files Piping systems for which the layout and support schemes are finalized can then be
55. oblem illustrates how to select and locate vertical supports to carry piping deadweight at operating condition Fig 4A shows a practical problem with 10 NB Standard schedule pipe from equipment nozzle at node 5 upto the reducer starting at node 30 8 NB Standard schedule pipe from this reducer to the pump nozzle at node 40 and a 6 NB Standard schedule branch line from the welding tee at node 25 to the equipment nozzle at node 125 The thermal stress contour plot given in Fig 4B confirms that the piping system is highly flexible and hence meets the code requirement for thermal load Fig AC shows the deflected shape for sustained load i e mainly deadweight It is observed that the weight of i the horizontal line from node 5 to node 15 and ii a major portion of the vertical riser from node 15 to node 20 is carried by the equipment nozzle at node 5 on the other hand the pump nozzle at node 40 carries the weight of i the horizontal line from node 20 to node 40 ii the valve portion of the branch line from node 25 to node 125 and iii a small portion of the vertical riser from node 15 to node 20 The deformation response for deadweight in turn generates large forces and moments and hence large sustained stresses at nozzle nodes 5 and 40 as shown in Fig 4D for sustained stress contour plot Fig 4E shows the same layout with variable spring hangers attached at the bends at nodes 20 and 115 which carry piping deadweight and provid
56. onc ccnnr cnn 2 1 5 Recommended Procedure for check REG 4 2 0 Installing the Program ciiciiccdeisitindescivesccinatenduascwiadedctdancuacduencedcsderdudntvanduacarandeandn 8 2 1 Operating System Heouirement cnn nn n nan c cnn nc ran rana nn ranas 8 2 2 Installing SST License Manager 8 2 3 Manually Registering and Configuring the Windows Service for SST License Manager 9 2 4 Installing the client program checkSTRESS oocccicoccconcccconccononanannnnnnnccnonnn nano nn nnnn cnn n nana n nn nnn rca nn 9 2 5 Produict Key Generation dde 12 2 6 Installing the Activation key 13 2 7 Renewing Re Installing the LICENSE oo occninnnicinoniccconnnocccnnnnancnnnn non nnnn nono cnn anar rr 13 30 Limita ainda A a 14 AU E Ee 15 AMOS EEN 15 APP A li ise Eesen gd 15 43 Bend EIDOW eieiei etii ii dada O id 15 EI 15 4 5 Reducir 15 G Blau 15 SS CEET 15 AB e rd vie 16 AMI A EE EEA EE 16 4 10 Three Way Valve sitters tds 16 AMM EE 16 4 12 F urway Valee iii A ai A EE a 16 A Matona EE 16 GE TEE 17 4 15 Thermal Anchor Movement T AM 17 4 16 User defined Equipment Nozzle Allowable Loads oooooocconnnccinnnonicicnnocccnnnnonancnonanncnn nana nanrnnnnno 17 darlas 17 App ped narran 19 3D Plant Design to checkSTRESS Component Mappimg nn nnnn cnn 19 PDP CMG E 20 Material TEE 20 Material DB Modification Creatton nono nana nn nn nn nn none naanncnnnns 20 Sample Code DB a GaAs i ie A Ae ele Gata area ta ale 21 S
57. ot defined then the Stiffness and Gap shall be transferred to checkSTRESS as 1E 12 lb in deg RIGID and 0 0 respectively Limit Stop Limit stop can be transferred from plant design software to checkSTRESS by specifying the following at support locations Directional components are must while specifying limit stop Syntax LIM Stiffness lb in or N m Gap in or mm Friction Coefficient Xcomp Ycomp Zcomp 28 Example Limit stop in Y direction with Rigid stiffness and gap of 50 mm with coefficient of friction 0 2 can be transferred by specifying the support attribute as LIM RIGID 50 0 2 0 1 0 Please note Rigid stiffness means 1E 12 N m will be taken in checkSTRESS The Gap value specified will be assigned to Lower limit of the limit stop and Upper limit is assigned as None in checkSTRESS Single acting Translational Restraints Single acting Translational Restraints are transferred as Limit stop to checkSTRESS If the user specify both single acting restraints e and for same direction then the Gap value of directional restraint is assigned to Lower limit and the Gap value of directional restraint is assigned to Upper limit of the Limit stop If one i e or directional restraint is specified then the Gap value will be assigned to lower limit or upper limit depends upon the sign and other limit will assigned as None By following the syntax mentioned below user can transfer
58. piping under operating condition the present configuration with only two equipment nozzles at nodes 10 and 130 and an intermediate anchor at node 95 safely meet the code stress requirement for sustained load E CheckStress Graphics D CheckStress MBF IntermediateAnchor_00 res File View Options Window Help DEI AALA o Fig 2A Layout with Node Numbers 38 File view FI CheckStress Deflected shape Expansion 11 D 1CheckStressIMBFWntermediateAncho DAR Options Window Help Ez mjm ES Fig 2B Thermal Deformation Plot Fl CheckStress SE SA D 1CheckStressIMBFWntermediateAnchor_00 res File View Options Window Help sm Fig 2C Thermal Stress Contour Plot 39 File view zt CheckStress Deflected shape Expansion 11 D CheckStress MBF IntermediateAncho DAR Options Window Help S Fig 2D Thermal Deformation Plot for Layout with Intermediate Anchor zt CheckStress SE SA D CheckStress MBF IntermediateAnchor_01 res Eile view Options Window Help sm Fig 2E Thermal Stress Contour Plot for Layout with Intermediate Anchor 40 Eh CheckStress SL Z SH D CheckStress MBF IntermediateAnchor_01 res File View Options Window Help AARC Fig 2F Sustained Stress Contour Plot for Layout with Intermediate Anchor 41 Sample 3 AxialSupport 00 and 01 This problem shows how axial restraints e supports that prevent movement in the pipe axial direction
59. porting piping systems especially in providing adequate flexibility to absorb expansion contraction of pipes due to thermal loads So when as designed piping systems are given to pipe stress engineers for analysis they soon realize that the layout is stiff and suggest routing changes to make the layout more flexible The piping designers in turn make routing changes and send the revised layout to the pipe stress engineers to check compliance again Such back and forth design iterations between layout and stress departments continue until a suitable layout and support scheme is arrived at resulting in significant increase in project execution time which in turn increases project costs This delay in project execution is further aggravated in recent years as operating pressures and temperatures are increased in operating plants to increase plant output increased operating pressures increase pipe wall thickness which in turn increase piping stiffness further increased operating temperatures applied on such stiffer systems increase pipe thermal stresses and support loads So it is all the more important to make the piping layout flexible at the time of routing by piping designers In order to substantially reduce the number of design iterations between the piping layout and stress departments resulting in huge time savings during design the Design by Color product checkSTRESS was developed and released in 2
60. r Appendix B and Appendix D for more details 2 0 Installing the Program Before installing the SST License Manager and the Client product on any of your computer please make sure the computer meets the following requirement listed below Note If you are using the old version of SST License Manager e earlier than version 5 0 then follow the procedure listed in Appendix A of Security System User s Manual on uninstalling the same before installing the new version of SST License Manager 2 1 Operating System Requirement a Internet Explorer 5 01 or later and Windows Installer 2 0 or later b Windows NT 4 0 Workstation or Server with Service Pack 6a c Windows 2000 Professional Server or Advanced Server d Windows XP Personal and Professional 2 2 Installing SST License Manager Locate Decide the computer that you want to use as a server for the checkSTRESS Product Any machine available in the network can be used as a server machine and it is not necessary to be a real server Insert the compact disc supplied by SST Systems Inc to the CD ROM drive of the computer that you decided to use as a server for checkSTRESS product Wait for few seconds to enable the Auto play of the CD Please note if the CD ROM does not start automatically simply browse the CD and double click on the setup application icon You will see a typical window similar to that shown in the figure left below The name shown on top left corner of
61. ranslational Restraint Type Stiffness ib in or N m Gap in or mm Example Double acting Translational restraints in X and Y directions with stiffness 1E 12 Dim and gap of 0 10 in can be transferred by specifying the support attributes as X 1e12 0 10 Y 1e12 0 10 Please note Stiffness Gap and Friction Coefficient are optional values If not defined then transferred as Restraint Data type i e X and Y restraint to CAEPIPE If Stiffness or Gap any one value is not specified then the Stiffness and Gap shall be transferred to checkSTRESS as 1E 12 Ib in RIGID and 0 0 respectively Double acting Rotational Restraints Double acting Rotational restraint s can be transferred from Plant Design software to checkSTRESS by specifying the following at support locations If Double acting Rotational restraint s are specified with Stiffness and Gap then transferred as Anchor data type with stiffness specified in that restraint will be assigned to corresponding rotational stiffness to the Anchor and Gap specified in that restraint will be assigned to corresponding rotational Displacement to the Anchor Syntax Rotational Restraint Type Stiffness lb in or N m Gap in or mm Example Double acting Rotational restraints in X and Y directions with rotational stiffness 1e12 lb in deg and gap of 0 10 rad can be transferred by specifying the support attributes as RX 1E12 0 10 RY 1E12 0 10 Please note Stiffness and Gap are optional values If n
62. ring Supports Corner amp Lada Myricks SSG Dynax NHK 30 60 120 Elcen NHK 80 160 33 Appendix F Sample Problems and Solutions using checkSTRESS This Appendix provides a few sample layouts specifically Sample1 Sample 2 Sample 3 and Sample 5 to illustrate how bends offsets loops axial restraints and or intermediate anchors are used to reduce thermal stresses in piping and resulting nozzle loads Sample 4 and Sample 5 illustrate how piping can be supported by spring hangers and resting steel supports to comply with the code requirements for sustained loads The CAEPIPE model files created using checkSTRESS for the sample problems listed in Appendix F are stored in the directory checkSTRESS_installation_path Samples for reference Sample 1 Loop_00 and Loop_01 This problem illustrates the use of expansion loops to reduce thermal stresses A 8 NB Schedule 80 pipe see Fig 1A connects two equipment at nodes 10 and 30 with an offset of 4 i e equal to distance between nodes 20 and 30 The pipe is of A53 Grade A carbon steel and is heated to 300 F Pipe between nodes 10 and 20 grows thermally to the right towards node 20 while pipe between nodes 30 and 20 grows up towards node 20 as illustrated in Fig 1B This thermal deformation generates large thermal stresses orange and red zones in the bend at node 20 and at anchor node 30 as shown in Fig 1C Fig 1D shows a revised layout with a loop introduc
63. rtical supports as those listed under the Section titled Sustained Load above are required To withstand static seismic g loads integral 2 way vertical and lateral restraints are required Generally some of the vertical weight supports can be modified as integral 2 way vertical and lateral restraints On the other hand for thermal loads zero supports give zero stresses So thermal stresses and equipment nozzle loads will normally decrease as the number of supports goes down Axial restraints and intermediate anchors are recommended only to direct thermal growth away from equipment nozzles 1 5 Recommended Procedure for checkSTRESS The steps given below may normally be followed using checkSTRESS to perform preliminary visual stress checks of piping systems designed using 3D plant design systems Step1 Generating checkSTRESS model Apply checkSTRESS on the piping system under consideration in the 3D plant model as outlined in the checkSTRESSPDMS checkSTRESSPDS checkSTRESSCADMATIC checkSTRESSPCF Manual In case some of the important inputs such as Thermal Anchor Movements at equipment nozzles and Allowable Nozzle Loads are not available in the 3D plant database PCF file they can be manually entered using the Edit Layout button provided in checkSTRESS Step2 Studying Thermal Stress results for the Initial Layout Review first stress contour plot for thermal stresses The plot is color coded such that
64. s which are already pre set at the P amp ID stage and hence these axial pressure stresses cannot be reduced by changing the piping layout or the support scheme On the other hand dead weight causes the pipe to bend generally downward between supports and nozzles producing axial stresses in the pipe wall also called bending stresses these bending stresses linearly vary across the pipe cross section being tensile at either the top or bottom surface and compressive at the other surface If the piping system is not supported in the vertical direction i e in the gravity direction excepting at equipment nozzles bending of the pipe due to dead weight may develop excessive stresses in the pipe and impose large loads on equipment nozzles increasing the susceptibility to failure by collapse Various international piping codes impose limits also called allowable stresses for sustained loads on these axial stresses generated by dead weight and pressure in order to avoid failure by collapse For the calculated axial stresses to be below such allowable stresses for sustained loads it may be necessary to support the piping system vertically Typical vertical supports to carry dead weight are a Resting steel supports b Rod hangers c Variable spring hangers and d Constant support hangers Both rod hangers and resting steel supports fully restrain downward pipe movement but permit pipe to lift up at such supports
65. sizes 4 NB Schedule 40 between the anchor node 10 and the first reducer starting at node 50 6 NB Schedule 40 between the first reducer and the second reducer ending at node 90 and 8 Schedule 40 between the nodes 90 and anchor node 130 The system temperature is 470 F Since the loop between nodes 10 and 40 is much more flexible as it is made of 4 NB pipe than the loop between nodes 100 and 130 the straight pipe between nodes 40 and 100 will thermally grow mostly towards the 4 NB loop as shown in Fig 2B straining the pipe between nodes 10 and 40 this in turn produces large thermal stresses e orange and red zones in the 4 NB loop and at anchor node 10 as observed in Fig 2C In other words the thermal growth of pipe between nodes 40 and 100 is mostly absorbed by the 4 NB loop and very little by the 8 NB loop defeating the very purpose of the 8 NB loop In order to alleviate thermal stresses in the 4 NB loop introduce an intermediate anchor at node 95 immediately after the second reducer so that the thermal growth of straight pipe from node 95 to node 100 is absorbed by the 8 NB loop while the thermal expansion of straight pipe between nodes 40 and 95 is absorbed by the 4 NB loop thereby making both loops achieve their intended purpose The corresponding thermal displacement and thermal stress contour plots are given in Fig 2D and Fig 2E respectively Fig 2F confirms that for the deadweight of
66. t Manage License from the computer where the SST License Manager is installed The details are shown graphically below di EaseUS Todo Backup Free 6 5 J Games J Glorylogic J Hp J Java de Maintenance Ji McAfee di Microsol ft NET Framework SDK Computer Control Panel J Microsol ft Visual Studio MET J Microsoft Visual Studio 6 0 Le SST License Manager Devices and Printers Default Programs Help and Support Select the option Register SST License Manager through Tools menu to register the window service as shown in figure left below After successful registration of the service you will see a message shown in figure right below Pr E SST License Manager OS Help Analyse Tool Register SST License Manager x Register SST License Manager A SST License Manager Service Registered Successfully Unregister SST License Manager 2 4 Installing the client program checkSTRESS Locate Decide the computers that you want to use as clients The client program checkSTRESS can be installed in many systems To install checkSTRESS on client computers insert the compact disc supplied in to the CD ROM drive and wait for a few seconds to enable the Auto play feature Please note if the CD ROM does not start automatically simply browse the CD and double click on the Setup application icon You will see a window as shown in left figure of Section 1 Installing the SST License Manager
67. te No of Users oe Lic Expiry Date No of Users fields are required Get Activation Key More gt gt Get Activation Key Close Enter the details as shown in the figure above and press the button Get Activation Key This will get you the Activation Key for Evaluation the product Full license for paid users If you wish to send and email press the button More gt gt and then Send email Press the More gt gt and then Show Details if you wish to store the license details in a text file Press the button Close to close the dialog Note For receiving the Activation Key please make sure that you have access to internet from your machine and the TCP IP port 12000 is not blocked by your hard soft firewall 12 2 6 Installing the Activation Key The Activation Key can be installed in two ways 1 2 Using client module and Using the Manage License Tool 2 6 1 Using Client module Launching the client product InfoPlant product module checks for the availability of the Activation Key corresponding to the module and pops up Security System dialog box in the client machine the InfoPlant product being loaded with provision to enter the Activation Key upon unavailability of the key Enter the Activation Key in the Activation Key text box and click the Activate button Upon successful installation user gets a message Activation Key su
68. to Real number format and need to transfer the file b For example Outer Diameter of a pipe is expected in Real Number format like 4 But in neutral file it may be like 4inch In this case translator will give the above error message User needs to remove inch from that field and save that neutral file then need to transfer Improper Bore or Weight Units Check the Neutral File Bore and Weight units entered in neutral file are invalid Translator will expect Bore Unit as either IN or MM and Weight unit as either KG or LB If any value other than the above is specified the translator will show error message containing the line number Entire line and the above message User needs to check unit used then needs to transfer Wrong Neutral File No Piping Elements available to Read Translator expects at least any one piping component present in the Neutral file If not it will show the above error message User needs to check the Plant Design Neutral file Number of Fields available in the above Line lt The Required Fields Translator expects some of the fields in a line from the Plant Design Neutral file If not available it will show the above said message with Line number and that particular line User needs to check and correct that line and then need to transfer or contact program vendor for more details 56 11 12 13 Error in Mapping Data Base Check the Data Bases
69. translated into stress input files of the pipe stress software currently covered under the checkSTRESS modules see Subsection 1 2 above Pipe stress engineers can then import these stress input files into their pipe stress software and perform detailed analyses and stress report preparation This eliminates a generation of stress isometric drawings and b re inputting the data into the pipe stress software Pipe stress engineers should check the stress models so sent by Designers and add additional input data into the models such as insulation thickness and density corrosion allowance and mill tolerance of pipe sections thermal anchor movements if not already entered seismic anchor movements support conditions such as friction and gap other occasional loads such as wind and water steam fluid hammer multiple thermal and pressure cases etc and perform detailed analyses It is most likely that the layout with the support scheme finalized by Designers using checkSTRESS should be able to meet all other pipe stress criteria for examples stress compliance for other thermal ranges and occasional loads leakage checks at flanges qualification of lug attachments welded to pipes etc thereby substantially reducing the number of iterations between stress and layout departments This manual describes the operational details of checkSTRESS It is assumed that the user is already familiar with the principles of Plant Design Software Piping Appl
70. ts which restrain pipe in its axial direction at appropriate locations such that thermal growth contraction is directed away from equipment nozzles especially critical ones f Introduce intermediate anchors which restrain pipe movement in the three translational and three rotational directions at appropriate locations such that thermal deformation is absorbed by regions such as expansion loops away from equipment nozzles In Appendix F titled Sample Problems and Solutions using checkSTRESS a few sample layouts are presented to illustrate how loops offsets axial restraints and intermediate anchors are used to reduce thermal stresses in piping and resulting nozzle loads Occasional Loads These are the third type of loads which are imposed on piping by occasional events such as earthquake wind etc To protect piping from wind which normally blows in horizontal plane it is normal practice to attach lateral supports to piping systems During an earthquake the earth may also move vertically To protect piping against both horizontal and vertical movement during earthquake some of the resting supports may be made as integral 2 way vertical and lateral restraints checkSTRESS presently performs preliminary visual stress checks only for sustained mainly dead weight pressure and other sustained mechanical loads thermal loads and static seismic g loads Fortunately to carry sustained loads normally ve
71. ty and Lining Thickness of the piping section 14 4 0 Reference This section describes in detail the methodology followed for transferring the piping components from Plant Design software to checkSTRESS 4 1 Loads Temperature Deg F or Deg C and Pressure psi or kg cm2 entered in 3D Plant Design software is transferred to checkSTRESS for all the elements If the specific gravity of the fluid with respect to water is specified during run time the same will be transferred to checkSTRESS If left blank then it will be set as 0 0 4 2 Pipe Pipe from 3D Plant Design software is transferred as Pipe to checkSTRESS OD and Thickness in or mm is read from the Plant Design Database and transferred to checkSTRESS for each element If OD and or Thickness are not available entered in the 3D Plant Design software then the program will read the OD and or Thickness from the Mapping DB corresponding to the Nominal Size specified in the 3D Plant Design for that element Material name for each pipe element is read from the 3D Plant Design Database the program then gets the material properties corresponding to the 3D Plant Design material name through the Mapping DB and writes the same to checkSTRESS for that element 4 3 Bend Elbow Bend Elbow from 3D Plant Design software is transferred as Bend to checkSTRESS The radius in or mm of the bend is extracted from the database if available otherwise it is calculated as the distance betw
72. with Flange FL Instrument Rigid Element RB Reducer Concentric Reducer Concentric RD Reducer Eccentric Reducer Eccentric ER Cross Four Pipes with Branch SIF Welding CR Tee Elbow Bend Bend EL Three way Valve Three Rigid Elements Three Pipes with 3W Concentrated Mass Four way Valve Four Rigid Elements Four Pipes with 4W Concentrated Mass Tee Three Pipes with Branch SIF Welding TW Tee Olet Pipe with Branch SIF Weldolet TO Support Restraint Data Type s HA Hanger Hanger Data Type HA Note Refer Plant Design software specific Readme file hlp supplied with the product for detailed component mapping 19 Appendix B Material Material name for each element is read from the 3D Plant Design database and is written to the neutral file The program then gets the checkSTRESS material information corresponding to 3D Plant Design material information as follows a checkSTRESS reads the Material Mapping DB file name from the table code available in Codedb mdb corresponding to the Analysis Code specified in the form during transfer b Gets the checkSTRESS Material properties from the Material Mapping DB thus obtained above corresponding to 3D Plant Design material description In case of unavailability of checkKSTRESS material property corresponding to 3D Plant Design material description available in the transfer file then program reads the checkSTRESS Material property specified in the first row of the Material
73. ws 7 i Default Programs System Help and Support See also Rati Windows Experience Action Center EZA index 1 gt Al Programs Windows Update Processor Ish Comp 2 Ou CHU Performance Information and ae Search programs and files P gt Tools a Installed memory RAM _ 4 00 GB 3 00 GB usable Ii L Double click on SYSTEM icon and then to Advanced system settings as shown on the figure right above From the window press the button Environment Variables you will see a window as shown in figure right below system Properties O Es Computer Name Hardware Advanced System Protection Remote You must be logged on as an Administrator to make most of these changes Performance J Visual effects processor scheduling memory usage and virtual memory d i lib EXProgram Files Microsoft Visual Studio Gm MSDevDir E Program Files Microsoft Visual Studio path E Program Files Microsoft Visual Studio Y User Profiles Desktop settings related to your logon n its Delete Settings System variables Startup and Recovery dei Ge E 4 S S AGSDESKTOPJAVA C Program FileslArcGIS Desktop10 21 Alca nep sein en at Bee checkSTRESS_C d ltemplhedkSTRESSNukeCADMATIC Settings checkSTRESS_P D Temp checkSTRESSNukePDMS e V CM2013DIR C Program Fi
74. ys recommended to keep the network cable plugged in before generating the Product Key on both Desktops as well as Laptops configured to use both in standalone and network mode 4 For XP operating system with service pack later than 1 0 open the TCP IP port 12000 from the Windows Firewall The procedure for creating the product key is explained in this section by assuming the name of the module you own as checkSTRESSPDMS During the first run of the product the client program communicates with the server computer and sends request to check for the availability of the license to use the product The server SST License Manger checks for the availability of the license in the windows registry If not available program automatically generates a new Product Key and send the same back to the client machine Client machine then pops up the same in a dialog box as shown in figure below ES CHECKSTRESSPDMS License Activation V ES CHECKSTRESSPDMS License Activation Client Name PBK Client Name PBK Company Name Infoplant Technologies Pvt Ltd Company Name Infoplant Technologies Pvt Ltd d plantEvsnl e 91 80 40336999 Email iplant vsnl com Phone 91 80 40336999 Email iplant vsni com Phone Product Key 0A957DFFFFFFDSAFFFFF5B7FFFFFA2DFFFFFSD3FFFFF63C666228 18888 Product Key OA957DFFFFFFDSAFFFFFSB7FFFFFA2DFFFFFSD3FFFFF63C 66622818888 Activation Key Activation Ey Lic Expiry Da

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