Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Attention: Please see the following AutoPIPE help sections: Help Contents Contents Tab 1. Reference Information Pipe Soil This section will provide information on a. Model Discretization b. Defining Soil Points in AutoPIPE c. Soil Restraint Properties in AutoPIPE d. Calculation of Soil Restraint Properties - AutoPIPE Method e. Calculation of Soil Restraint Properties - ASCE Method f. Comparison of Soil Restraint Properties g. Soil overburden stresses application on AutoPIPE points 2. Modeling Approaches Example systems PIPE-SOIL Interaction: Transition Example. The purpose of the following example system is to demonstrate the procedure required to a. Calculate soil properties using AutoPIPE and ASCE method b. Verification of values with hand calculations c. Determine the location of critical piping points to be defined for the above to below ground (transition) piping system shown in the Figure below. In this example, the piping system is subjected to a temperature rise of 230°F, and an internal pressure of 100 psi. For simplicity, a single soil will be assumed to interface with the pipe over the entire length of the buried portion of the system. This online help section will provide step by step procedure of modeling soil properties in AutoPIPE. Comments, Quesions, and Answers about Soil Properties: Item #1: What will be the yield displacement value for following - yield displacement to calculate longitudinal loose clay soil spring stiffness; - yield displacement to calculate longitudinal loose sandy soil spring stiffness; Answer: Per the onlne help for this parameter, Longitudinal Yield Displacement, y1L [inch] Enter the longitudinal yield displacement. The value is used when calculating the soil resistance, p1, in the longitudinal direction. Defaults: Low = D/60, High = D/25. Also, per the AutoPIPE soil example (mentioned above): For medium sand, assume the value of yield displacement to be d/45. Bentley is not able to provide a specific values for modeling, must use engineering judgement or consult a soil engineer when determing values such as this. In addtion, AutoPIPE's Soil calculator can consider high, low, and avg values when generating soil spring stiffenss values based on soil parameters. Item #2: Would it be appropriate to design fault line crossings by applying an offset to the pipeline? Are there any other way to model this? Answer: AutoPIPE provides the ability to the user to be able to generate soil stiffness properties using the method provided in ALA guideline (ASCE 2001: Guidelines for the Design of Buried Steel Pipe). Using the imposed support displacement with a buried pipe model, it may be possible to model a fault line crossing. There is no specific workflow currently in AutoPIPE to model a fault line crossing. You can model a buried pipeline by provide the soil stiffness values in four directions, and then apply imposed support displacement values (e.g. If your total fault line displacement is say 10", you may start by providing 1" imposed support displacement from one piping node, increment that until you reach 10" total displacement). You may continue the imposed displacement after the fault line crossing keeping it at 10" until a virtual anchor is reached. The displaced model would look something like the one shown below: See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: Model Soil Properties in AutoPIPE
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Forum Post: RE: ASME B31.3&31.8
Hello Mykola, No, it is nor suggested that you mix pipiing code material libraries. To answer your questions, see the following Bentley Communities WIKI page: communities.bentley.com Place your cursor in the Search Field and type "AutoPIPE material library ", and select the WIKI page titled: Does AutoPIPE have my material? Please read the documennt for options available about the material library. Regards, Mike Dattilio Bentley Technical Support Analyst Web: selectservices.bentley.com Create your Service Request online! Log in to SELECTservices Online via selectservices.bentley.com and then go to My Support Account Service Request Manager. You'll have the ability to create a new Service request, view all Service Requests created by you or anyone else in your company, and view statistics on previous requests.
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Forum Post: RE: ASME B31.3&31.8
Dear Mike, thank you for your reply. Can you give pls. some information regarding my second qestion?
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Wiki Page: ASME B31.8 Piping Code Calcualtion Issues
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: calculcations Subarea: Original Author: Bentley Technical Support Group ASME B31.8 Piping Code Calcualtion Issues Comments, Questions, and Answers Item #1, How to calculate B31.8 code allowable of per code equation: Given the following example information: Answer: Sc = 0.33 Su T at minimum installed or operating temperature = 0.33 * 455.05 = 150.16 N/mm2 Sh = 0.33 Su T at maximum installed or operating temperature = 0.33 * 455.05 = 150.16 N/mm2 SL = longitudinal stress calculated according to para 833.6.(a) From AutoPIPE on-line help, refer to the sustained stress calculation for B31.8: Note: this value is already calculated in AutoPIPE as stress results for Gr + MaxP loadcase SL = 327.53 N/mm2 f = Range factor = 1.0 (setting from Tool model Options Results) Sa = 1.0 * [ 1.25 * (150.16 + 150.16) - 327.53] Sa = 47.886 N/mm2 as shown in the output report above. Note: The limit of SL = 0.75 S is for sustained stress acceptance. The actual stress calculated is used by AutoPIPE when calculating the thermal allowable SA. Item #2, Exactly how is AutoPIPE calculating the combined stress for a node point, equation used and individual values being applied in the equation? Answer : For Tresca stresses, AutoPIPE calculates three values for longitudinal stress as follows: SL1 = Axial (Neutral axis) SL2 = Axial + Bending (Max Long if Axial is positive) SL3 = Axial - Bending These three values are used to calculate Tresca stresses using: Similar approach is taken for Von Mises calculation. Item #3, The hoop stress uses the D/t ratio to decide which formula to use, thin or thick, However which is being used in combined stress equation, does the D/t ratio still apply for the hoop stress values used in the combined equation? Answer : D/t ratio is used to decide hoop stress formula to be used in combined stress equation. A good discussion on a similar issue is available in our Pipe Stress Analysis Forum which can be accessed by the link below: http://communities.bentley.com/products/pipe_stress_analysis/f/275801/p/70679/186018.aspx#186018 Item #4, How can I set the RESTRAINED pipe option for B31.8 2007 onshore / underground piping Answer: Please see the following AutoPIPE help section: Help Contents Contents Tab Reference Information Code Compliance Calculations ASME B31.8-2007 Code Combinations Here you will see 2 charts displayed, restrained and unrestrained. Note that the combination's category will determine which calculators are used, i.e. restrained or unrestrained equations. Under the charts are a number of notes that you should review for a better understanding of AutoPIPE's analysis. The calculations for restrained piping is conservative and assumes a small amount of contribution from bending, even on straight piping. The more restrained the piping is with more supports or higher soil properties the less contributions from bending and the closer to code calculations for St = E x alpha x (delta T). See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: AutoPIPE Preview Handler encountered an unexpected error - The error code is 2908 or Error:=1603
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: install Subarea: Original Author: Bentley Technical Support Group Problem: The following appeared when installing AutoPIPE: The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2908. Error:=1603 Answer: Cause You may receive this error message if any one of the following conditions is true: The folder that you are trying to install the Windows Installer package to is encrypted. The drive that contains the folder that you are trying to install the Windows Installer package to is accessed as a substitute drive. The SYSTEM account does not have Full Control permissions on the folder that you are trying to install the Windows Installer package to. You notice the error message because the Windows Installer service uses the SYSTEM account to install software. Resolution To resolve this problem, do any one of the following, depending on the cause of the problem: Install the package to a folder that is not encrypted. Use this method if you receive the error message because you try to install the Windows Installer package to a folder that is encrypted. Install the package to a drive that is not accessed as a substitute drive. Use this method if you receive the error message because the drive that contains the folder that you try to install the Windows Installer package to is accessed as a substitute drive. Grant Full Control permissions to the SYSTEM account. (for Windows 2000 and Windows XP only) Use this method if you receive the error message because the SYSTEM account does not have Full Control permissions on the folder that you try to install the Windows Installer package to. Following is a link to Microsoft Knowledge Base article on error 1603 and possible resolution. http://support.microsoft.com/kb/834484 Noticed that the two errors appear to involve .NET assemblies. Perform a repair of Microsoft .NET Framework 3.5 SP1. To do this: 1. Open the Programs and Features control panel. 2. Select Microsoft .NET Framework 3.5 SP1 in the list of installed programs. 3. Click the Uninstall/Change button just above the list (see attached screenshot). 4. In the window that appears, the Repair option should be chosen already. Click the Next button to proceed. 5. Once the repair is complete, attempt to install AutoPIPE and any dependencies by running Setup.exe in the ap09050021en folder again. Notes: Some IT departments have reported struggles with getting this package repaired/working. Trying to repair the Microsoft. NET Framework v3.5 did not work initially and neither did attempting to re-install it (either installing it direct before trying to install AutoPIPE, or letting AutoPIPE do the Microsoft. NET Framework v3.5 installation). Both approaches still got the same errors mentioned above. We even searched for updates/M-soft fixes and tried to run those on it to no avail. If this occurs investigate if Microsoft. NET Framework v4 is installed. If so, deleted it off the system (and checked for any other versions too), and then installed Microsoft. NET Framework v3.5 directly from file 'dotnetfx35.exe' from M-soft's website. This installed with no errors and subsequently AutoPIPE, AutoPIPE acceptance test, the structural dashboard and the licence tool should now install with out error. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: Installation - AutoPIPE
Topics under the heading should be based on: Release notes, Hardware related issues, Download, Installer issues. Missing components, short cuts, user access rights etc. Bentley AutoPIPE Release Notes How do I download, install, and license AutoPIPE? Installing AutoPIPE on an untested Operating System, (i.e. Win 8) Hardware Related Issues Performing a silent installation Install multiple versions of AutoPIPE on the same computer For AutoPIPE V8i 09.05.xx.xx and lower; install Bentley IEG First Reassociate AutoPIPE's DAT file extension to execute the program when double selected Installing and running AutoPIPE on a computer with MS Bitlocker AutoPIPE Preview Handler encountered an unexpected error - The error code is 2908 or Error:=1603
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Wiki Page: Microsoft Blue Screen - A problem has been detected and Windows has been shut down to prevent damage to your computer
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Start- Up Subarea: Original Author: Bentley Technical Support Group Problem: When starting AutoPIPE, Microsoft Blue Screen appears: A problem has been detected and Windows has been shut down to prevent damage to your computer How to resolve? Answer: Suggest one or more of the following: Read the Blues creen info and perform as needed. If equiped, update the driver for her TARGUS USB driver. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: z> Attend a live meeting with an AutoPIPE Analyst
Attend a live meeting with an AutoPIPE Analyst: There are 3 options with which to enable AutoPIPE analyst to see your monitor: Team Viewer, Microsoft Lync or Simple Help. Each method has benefits and limitations. Let me know if you have a preference. Otherwise, this document will focus on using Microsoft Lync, see instructions below: Attention: see bottom of page for instructions to install application required for troubleshooting issues. Option #1: Join a TeamViewer Meeting If this is your first time in a net meeting please follow these instructions in order to join the TeamViewer meeting: Select the following web link: http://download.teamviewer.com/download/version_8x/TeamViewerQS.exe Your browser may prompt whether to proceed. In Internet Explorer, press the Run button. In other browsers such as Chrome or FireFox, download the file, and then run it afterwards. Please note that the download process may take some time. The following dialog may be displayed. Press the Yes button to continue. In another few moments the following is displayed: You must send the AutoPIPE analyst "Your Id" number and "Password" each time you engage in an online meeting as the values will change every time. Option #2: Join a Microsoft Lync Meeting If this is your first time in a net meeting please follow these instructions in order to join the Lync meeting. Just before the meeting an analyst will send you a meeting invite link similar to the one below: Note: these values change with every meeting invite sent out. Open the internet address above in an internet browser. The following may appear: . Suggest selecting the link “Download and Install Lync Attendee” and follow all on screen instructions to install the application. After the application has been installed, open the internet address originally sent in step 1 above. The following screen will appear, select “Join as Guest” by selecting the radio button, Enter a screen Name, and pressing the " Join" button If you have a speaker and microphone hooked up to your computer you can use them now. Otherwise dial the phone number provided in the original email (see step #1 above). If for some reason the Lync phone number is not working, please use the following (Note: this number is only valid with AutoPIPE analyst Mike Dattilio, live meetings with other analyst will require a different access code). 800-504-8071 access code = 4255891 After entering the meeting, share your screen by selecting the Share drop down option and choose “ Desktop ” or “ All monitors ” Option #3: Join a Simple help Meeting This the last resort as this link is very slow. If this is your first time in a net meeting please follow these instructions in order to join the Simple Help meeting: Select the link below: http://simplehelp.bentley.com Note : may not work on computers with Windows XP OS. The following should appear: Press the " Download Remote Support " button and the following should appear: Note: IE9 and higher user may need to press Run button at the bottom of the screen Press Accept button, Enter your Name , press the Submit button, and notify me what name you had used. The following screen should be diaplayed until an analyst connectes to your system: Instructions to install MS WinDBG software: MS WinDBG file is a necessary application in troubleshooting abnormal issues related to Bentley software running on your system. Before entering into the scheduled meeting with the TSG analyst or software development team be sure to complete these steps to download and install MS WinDBG software from the Microsoft web site. You may need your IT department to assist you in completing this task. 1. Navigate to the following MS Windows web site: http://msdn.microsoft.com/library/windows/hardware/ff551063(v=vs.85).aspx a. For those who have the following Operating System: Win 8.1, Win 8, Win 7, Windows Server 2012, or Windows Server 2008 R2, select the following hyperlink link: http://msdn.microsoft.com/en-US/windows/desktop/bg162891 b. For those who have Windows Vista, Windows XP Service Pack 3 use the following hyperlink: http://www.microsoft.com/en-us/download/details.aspx?id=8279 2. Following the correct download link above, continue with the installation based on screen instructions. Note: No need to install .NET framework 4.5. Select only Debugging tools for windows on features page.
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Wiki Page: Export AutoPIPE Batch (NTL)
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Import / Export Subarea: Original Author: Bentley Technical Support Group Any Comments, Questions and Answers about exporting an AutoPIPE Batch NTL file from AutoPIPE Comments, Questions, and Answers: Item #1: AutoPIPE: save model as *.NTL & open NTL What are the concerns with saving an AutoPIPE model as an AutoPIPE Batch (*.NTL) file and then opening that *.NTL file in AutoPIPE? TR Number: none Product: AutoPIPE Version: all Area: General Problem ID#: 79405 Answer: The process of saving an AutoPIPE model (*.DAT) file to an AutoPIPE Batch (*.NTL) file, and then opening the *.NTL file in AutoPIPE to create a new *.DAT file is referred to by us as "round tripping a model" Information is saved to the AutoPIPE model *.DAT file in a database format with very specific settings and arrangement of data. The AutoPIPE BATCH file (*.NTL) is data written out from the database into a specific formatted text file. When the NTL file is opened in AutoPIPE, the model is created based on the NTL file settings. Because of translating data from DAT to NTL back to DAT, some data is updated with current library information, not exported from the DAT to the NTL file correctly, or other unknown issues. This is why it is VERY VERY IMPORTANT to follow this procedure: 1. Open original AutoPIPE model DAT file (Test.DAT) 2. Run an analysis. 3. Select Results Output report ensure all sub reports are checked ON,(except “Sort Stresses” should be turned OFF), save Test.OUT. 4. Select File Save As AutoPIPE Batch (TEST-1.BAT) 5. Select File Open AutoPIPE batch (*.NTL) select file (ex.Test-1.BAT) 6. READ and understand any reports that is automatically displayed (ex. CHK, MSG, etc..) 7. Select Results Output report ensure all sub reports are checked ON,(except “Sort Stresses” should be turned OFF), save Test-1.OUT. 8. Use an application (i.e. Ultra Compare, Beyond Compare (free on internet)) to compare both Test.OUT and Test-1.OUT to CLEARLY see the differences. 9. IN MOST CASES, the new DAT file will need to be updated to match the original DAT file. Again, it is very important to perform this process of file comparison and to thoroughly review the new DAT file to be sure of model settings. Item #2: When AutoPIPE exports an AutoPIPE Batch (NTL) file the following is displayed: Bentley AutoPIPE Application has stopped working Windows is checking for a solution to the problem... then the following is displayed: Bentley AutoPIPE Application has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. [Close program] button Reasons this occured: 1. The model contains an invalid value (zero) for pointer to buried pipe options Solution #1 A. Change piping code from B31.3 to B31.1 because buried pipe option is not available in B31.3 B. Open Buried Pipe Options dialog (Tools Model Options Buried Pipe Result Options) and Press Ok so that buried pipe options pointer will be updated 2. The analysis set has a fluid density factor that is blank. Solution #1 A. Open the analysis set, Load Analysis set. B. Confirm that all Fluid Density Factors are not blank but have a valid value. 3. The soil name is changes at a bend's Near node point. Solution: Soil property name should be the same around a bend or changes name only at the elbow's Far node point . 4. Model has Valve with "Actuator Auto" turned off. Solution: for troubleshooting purpose set Valve with "Actuator Auto" turned ON . 5. Program may terminate abnormally if invalid pipe found on NTL roundtrip Solution: Logged under CAE-TR-10662, to be added to newer version of the program (Corrected Version: 9.6 and higher). Program calculates bend far point coordinates based on bend point to the succeeding point. On NTL import, program checks if the bend point and succeeding point offset difference is almost equal to zero then it deletes the succeeding point. Similar method is followed for bend point and preceding point to get the bend near point coordinates.On deletion of point, it also deletes responding guid. But guids were not created yet for imported NTL. Therefore program crashes. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: Model Non-metalic Plastic Piping (i.e. Plastic, PVC, PP, PPR, HDPE, PE, FRP, GRP, etc.)
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about modeling non-metalic plastic piping (i.e. Plastic, PVC, PP, PPR, HDPE, PE, FRP, GRP, etc.) using AutoPIPE Item#1: See the following file for typical modeling plastic piping modeling approaches - download attached file Note: AutoPIPE V8i 09.05.01.xx and higer has a new Piping code: Iso14692 (Petroleum and Natural Gas Industries - Glass Reinforced Plastics (GRP) Piping). Item #2: Why is it not possible to use elbows with HDPE pipe as with steel pipe? (Note from AutoPIPE Help: "For HDPE pipes, only Close and Wide are accepted options.") Answer: At this time, AutoPIPE has only provided HDPE for B31.1 and ASME NC/ND and that uses the CC-N755-1 provisions. CC-N755-1 only permits miter bends for HDPE and provides B1 & B2 indices for miter and close bends only. Otherwise, you would need to have stress indices for your HDPE bends that could be manually entered. Item #3. Is it possible to calculate HDPE pipe using any other (non-nuclear) code than N-755-1? Answer : yes it would be posible, define Non Standard (NS) Pipe, enter the correct values of allowable, modulus and other data required for calculations Item #4. How to add Seismic load case "Seis Ind Cmb.1-HDPE{1}" for HDPE combinations for ASME 31.1 pipiing code? Answer : Specifically, after analyzing the system, select Tools Combinations, Code combination tab, press the " Seismic Combs ." button, specify both a "Equivalent Sismic Wave Prop Case" (T1) and "Seismic Anchor Movement Case" (S1) for each Comb 1-4, note "Soil Settlement Cases" are optional. Press OK button to close the dialog screen and press " Reset Default Only " button, now "Seis Ind Cmb.1-HDPE{1}" combination will appear in the "Combination" column. See online help and Documents folder in the AutoPIPE directory for "Tutorial-ASME_B311_With_HDPE.pdf" for more information. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: Modeling Approaches, Tips, Technique for Flanges Piping Components in AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Modeling Subarea: Original Author: Bentley Technical Support Group Attention: Please see the following AutoPIPE help section: Help Contents Contents Tab Modeling Approaches Modeling Approaches This help has been provided in order to give users ideas for modeling typical piping arrangements. The steps shown in each example should not be taken as the only method available to create models. In addition, the intent of the examples is to present ways to create adequate models of specific piping components for analytical purposes. Anchors Bends Cuts Flexible Joints Frames Hangers Nozzles Pipes Reducers Rotating Equipment Supports Tees Valves Vessels Questions, and Answers: Item #1. How to model typical flanges in AutoPIPE V8i 9.6 and Lower: Answer: In AutoPIPE V8i 9.6 and lower, flanges are a 1 point element with no length The program only considers the flange weight and weld connection for SIF calculations. Assuming flange stiffness is same as the pipe is technically incorrect because a flange is more rigid than pipe. However, it does NOT affect analysis results to any significant extent. You can choose to model a flange as a single point or take into consideration the actual flange length. See the following procedure to model the actual flange length: A. Assuming a flanged nozzle connection to be anchord to a vessel, insert an anchor. B. Insert a short run of pipe equal to the actual flange length. C. Insert another pipe run and to the next node point in the model. D. Insert a flange at Nozzle interface, in this example, start of the segment/anchor point. On the flange dialog, change Joint End Type = " User Defined", set "Joint SIF" = 1.0 (note: can use any joint end type connection so long as the SIF calculated is 1.0 at the flange point) E. Select this short length of pipe representing the actual flange length, press Insert Rigid options over Range (Include Weight = off, Include Thermal Expansion = off...pipe will be shown purple), and press OK button F. Select the node point representing the flange connection to the pipe. Press Insert Xtra Data Joint Type user SIF. Selec the correct type of end connection or enter a user SIF. (From AutoPIPE V8i 9.5) Item #2. Model a Anchor flanges: Answer: Anchor flanges are considered to be buried within concrete. Modeling approach: A. On the segment where the flange is to be modeled, insert a node point (ex. B04) as the welded connection between he pipe and flange B. Insert a Pipe run half the total length of the Hanger flange (ex. B05). C. Insert another Pipe run with the same length as in Step B above (ex. B06). D. Select the middle point of the flange (ex. B05), insert a flange component. On the flange dialog, change Joint End Type = "User Defined", set "Joint SIF" = 1.0 (note: can use any joint end type connection so long as the SIF calculated is 1.0 at the flange point) E. Select both pipe runs (ex. B04-B05 & B05-B06), press Insert Rigid options over Range (Include Weight = off, Include Thermal Expansion = off...pipe will be shown purple), and press OK button F. Select both flange end points (ex. B04 & B06), Press Insert Xtra Data Joint Type user SIF. Select the correct type of end connection or enter a user SIF. G. Connection to support: choose one of the following, model connection as simple supports or model with soil properties Notes: i. Model connection as simple support: add additional node points (ex. B03 & B07) with rigid pipe properties as done is step E to represent pipe entombed in concrete. At the locations where the pipe enters the concrete add AutoPIPE supports or anchors as needed. ii. Model connection with soil properties: add additional node points to represent pipe entombed in concrete. Insert Soil properties over same node points added. Select all the pipe with in the concrete and apply the correct soil properties to mimic concrete. Item #3. Model a Hanger flanges: Answer: Hanger flanges are considered to be bolted to a structure. Modeling approach: A. On the segment where the flange is to be modeled, insert a node point (ex. B04) as the welded connection between he pipe and flange B. Insert a Pipe run half the total length of the Hanger flange (ex. B05). C. Insert another Pipe run with the same length as in Step B above (ex. B06). D. Select the middle point of the flange (ex. B05), insert a flange component. On the flange dialog, change Joint End Type = "User Defined", set "Joint SIF" = 1.0 (note: can use any joint end type connection so long as the SIF calculated is 1.0 at the flange point) E. Select both pipe runs (ex. B04-B05 & B05-B06), press Insert Rigid options over Range (Include Weight = off, Include Thermal Expansion = off...pipe will be shown purple), and press OK button F. Select both flange end points (ex. B04 & B06), Press Insert Xtra Data Joint Type user SIF. Select the correct type of end connection or enter a user SIF. G. Connection to support: choose one of the following, model connection as simple supports or model with beam elements Note: i. Model connection as simple support: Insert AutoPIPE supports as need at the flange center point (ex. B05). ii. Model connection with beams: Insert rigid beam elements from the flange center (ex. B05) to the actual bolted support connection (ex Sq beam). Add additional beams with the correct beam properties from the bolted support connection to the support structure that is correctly supported (ex. Angle beams). Item #4, How to model a Stub End, Swivel, or Misalignment Flange Answer: The swivel flange is used with medium service pressures at points where the bolt holes in the mounting flanges are not precisely aligned. The swivel flange simplifies fitting between 2 fixed points. Answer: For strss analysis purpose, the program needs to know the weight and SIF associated with a flange. Most ASME piping codes do not have established SIF values for these types of flanges. Whilst ASME 16.5 and 16.47 codes are applicable for weld neck flanges, they are not applicable to swivel ring flanges beyond the bolt pattern and bolt sizes. ASME offer alternative rules that consider swivel ring flanges as non-standard, or loose type, flanges. Therefore the modeling appraoch for these types of flanges: Select the node point where the flange is to be located, press Insert Flange , on the flange dialog screen enter: Flange type = NS Pressure Rating = NS Weight = enter weight from vendor literature Joint End Type: User Defined Joint SIF: contact flange manufature for value to be used. Note: One could argue to set Joint end type = "Lap joint" in order to automatically calcuale the SIF. However, since these types of joints are not covered by the applicable piping code, you will need to use engineering judgement or contact the manfacture. Bentley TSG cannot provide a definative value. See Also Bentley AutoPIPE External Links Bentley Technical Support KnowledgeBase Bentley LEARN Server Comments or Corrections? Bentley's Technical Support Group requests that you please submit any comments you have on this Wiki article to the "Comments" area below. THANK YOU!
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Wiki Page: AutoPIPE FAQ - Soil
Question #1: What is an adequate spacing required for piping points (nodes) and soil points? Answer: There is no one answer to this question. See AutoPIPE's online help for suggested soil spring spacing based on Zone 1, Zone 2, or Zone 3 piping. These are only suggestions may need it increase/decrease soil points as required for convergence issues. Question #2: The more the nodes, some of the load cases (temperature, pressure and user-defined) do not converge Answer: If a model does not converge, please see the following AutoPIPE help section: Help Contents Search Tab enter "Failure to Converge" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information. Review the *.LOG file to understand where the failure is occuring and address the location. See omline help for details about the *.LOG file. Question #3: What is the most soil deformation that AutoPIPE can handle? Answer: Soil Deformations This can be a difficult problem, since the settlement is such a large soil deformation of 1600mm All beam theory piping analysis programs such as Autopipe, Caesar, pipeplus are based on small deformation theory and large displacements can give an ill-conditioned solution and erroneous results. As an example, large deformation across a large span of 200m. The maximum slope of the pipe may be of the order of 0.025 radians and the solution should be ok As a check that Autopipe can handle these large deformations use the following rule of thumb. Check that the maximum slope angle in radians of the deformed pipe = approx. sin (slope angle) then the solution should be ok. One method to simulate subsidence of known amount e.g 25mm see below. Set the yield P1 = 25 as shown below and K1 (initial) value = 0.001 and calculated soil stiffness = K2 (final) SOIL PROPERTIES Soil Initial K yield P Final K Yield disp ID Dirn (N/mm/mm ) (N/m ) (N/mm/mm ) (mm ) ------ ------- ---------- --------- ---------- ---------- SOIL1 Horiz. 6.540 699861.00 0.000 07.0118 Long 17.540 43859.00 0.000 2.5005 Vert Up 2.790 139303.00 0.000 49.9291 Vert Dn 0.001 25.00 23.030 24.9999 One method: If the maximum settlement is unknown, then model the soft waterlogged soil over the known span and known firmer soil at ends. Apply the over-burden sand weight as UDL load or vertical wind load (to simulate the pressure of the 4m sand) on the pipe and observe the deformation and check the resulting maximum slope. Note: ensure the final soil stiffness values K2 is not = 0 but a finite value e.g 0.001. The vertical down K2 value should be known (ie final soil conditions after settlement) and the P1 (soil yield ) value can be 'tweeked' to achieve the distance between the soft and final soil condition. Check that the actual pipe movement reaches the final soil condition otherwise the solution may become ill-conditioned. Maybe the sand has a influence on calculating the upward soil stiffness but this direction should not be important.. Question #4: Is there an error in the program. Why is the high stiffness values being used for the low Stiffness calculations and vise-versa Low values being used for the high stiffness calculations: Answer: This is not an error. The Yield Displacement is calculated via formula YD = P1/K1. However while calculating the K1 & P1 stiffness values we use low yield displacement values for high stiffness value and vice versa. This behavior is also described in the note Note: High yield disp. is used for low stiffness. Just below the Pipe direction selection on the dialog (shown below). For the parameters, the following rule is applied: 1. If the user updates a value in the low column, which is greater than high column value, the low column value is assigned to the high column value. 2. If the user updates a value in the high column, which is lower than the value in low column, there is no update to the low column. This behavior is missing from the online help and will be added in a future version of the program.
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Forum Post: Bending Stress in Pipeline Elastic bends
Hello I am working on a buried 10 inch pipeline ( ASME B31.8) , I have noticed that Auto pipe does not consider the bending stresses in the pipe due to large diameter elastic bends ( 1200 m). it only reports the stressses due to pressure , temperature and gravity . can any one help ? Regards shk
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File: Discussion AutoPIPE Non-linear analysis.pdf
A simplified explanation is below Imagine friction "building up" on the piping after thermal load. It hasn't broken friction or closed a support gap yet, but it's building up to that point of doing so. Wind or seismic just gives it that little push to break friction and or close the gaps, but it does require that extra ‘push’ to make it happen. Therefore, the boundary conditions change, but only AFTER the wind load hits, so boundary conditions are different between the thermal and wind load analysis. This is only captured using a Non-Linear incremental approach and not Total Loads approach.
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Wiki: Pipe Stress and Vessel Design - Wiki
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Forum Post: RE: Bending Stress in Pipeline Elastic bends
Hello SHK, I apologize, but I do not understand your question. What load case are you expecting to see bending stresses for in your model of a large radius bend? I created a simple model with a large radius bend and was able to see bending stresses for operating, sustained, occasional,etc.. load cases. Please be more specific. Regards, Mike Dattilio Bentley TSG Support Analyst ===================================================
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File: Recommended non-linear seismic load combinations
Two options that are recommended for static earthquake loading
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Forum Post: RE: ASME 31E seismic load calculations
Hello Mykola, Please see the following file for recommended non-linear seismic load combinations. communities.bentley.com/.../269425.aspx You can modify these recommendations as needed to meet your requirements. Regards, Mike Dattilio Bentley Technical Support Analyst Web: selectservices.bentley.com Create your Service Request online! Log in to SELECTservices Online via selectservices.bentley.com and then go to My Support Account Service Request Manager. You'll have the ability to create a new Service request, view all Service Requests created by you or anyone else in your company, and view statistics on previous requests.
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Blog Post: Bentley AutoPIPE 2014 eSeminar Topics - Looking for User Input
Please click on the link below to give us your feedback on what topics you would like us to discuss during the 2014 eSeminar series:
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Forum Post: Auto pipe seismic and wind loading..
Auto pipe seismic and wind loading , combination . Is there any tutorial for wind and seismic loading . How to show seismic and wind loading on pipe visually
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