Although most earlier tests are made on equal tees, reduced branches give very reasonable results. To my knowledge equal tee and reduced tee will have very different SIF values per the code. The fatigue crack in bending for the bend will occur at the middle lower point for horizontal bend. The PIPE STRESS ENGINEERING book by Peng has excellent discussion on the bend SIF and on the 0.75 factor for sustained stress. For tees the failure point is assumed to be at the header junction weld for B31.3.
↧
Forum Post: RE: User SIF for complex geometries
↧
Wiki Page: E801-11: Fatal Error: no mass in the system
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Error Subarea: Original Author: Bentley Technical Support Group Problem: The following message is displayed when analyzing the system: E801-11: Fatal Error: no mass in the system Answer: Open the model in AutoPIPE, select Tools Model input listing check on all sub reports, and press OK button. In a few moments AutoPIPE Viewer will display the report, use the Edit Find feature to look for all occurrence of "NaN" NaN stands for Not a Number and means that there is a problem in the database somewhere. As indicated in the above image, notice that NaN occurred in a specific Pipe Property for Pipe Unit Weight or some other weight. Fix the model: One or more of the following should fix your model Options #1: 1. Open the model in AutoPIPE. 2. Open the input grids to view the the pipe properties. 3. Scroll over to see the column marked "Insul Dens". 4. Change the insulation Density for all PipeIDs in the model to a different value. 5. After completed, change all the values modified above back to their original values/settings. 6. Repeat steps 3-5 for each PIPEID. Note: Steps 1-6 above essential reset the materials to be sure that AutoPIPE updated the internal database from library data on the computer. 7. Create a new model listing report with Tools Model Input listing command. and search for NAN again. 8. a. If there is no occurrence, great the model has been repaired, continue using the application. b. If NaN still exist, continue to next option. Option #2: 1. Open the model in AutoPIPE. 2. Open the input grids to view the the pipe properties. 3. Open PipeID dialog screen. 4. Press the Tab keyboard key to cycle through the dialog in a predetermined sequence. Note: Each press of the TAB key highlights the value in the indicated field. Confirm no space are at the end of the value, sometimes best to re-enter some values to be sure. 5. When the "Pipe Material" field is highlighted, change the existing selection to a different material from the drop down listing. Continue to press the Tab key until OK is selected, and then press the Enter / Return key on the keyboard to acknowledge the changes and to also close the dialog screen (yes, you could use your mouse to select the OK button). 6. Repeat steps 3-5 for each PIPEID noted in the initial search for NaN above. 7. Go back to each PIPEID from steps 3-5, changing the new value back to the original value (yes, you can use the mouse to directly change the materials back to the original settings). Note: Steps 1-6 above essential reset the materials to be sure that AutoPIPE updated the internal database from library data on the computer. 8. Create a new model listing report with Tools Model Input listing command. and search for NAN again. 9. a. If there is no occurrence, great the model has been repaired, continue using the application. b. If NaN still exist, continue to next option. Option #3: 1. Another solution, create a new model with a different model name then use File Insert Model AutoPIPE model (*.DAT) command to import the original file into this new model. Again create a model input listing searching for NAN. If NaN still exist, continue to step #10, otherwise the model has now been repaired, use AutoPIPE to finish the analysis. 2. a. If there is no occurrence, great the model has been repaired, continue using the application. b. If NaN still exist, continue to next option. Options #4 AS A LAST RESORT!!!, if steps 8 & 9 did not resolve your issue, open the original model in AutoPIPE, select File Save AS AutoPIPE Batch (*.NTL), save the NTL file as a different name from the current (i.e TEST.DAT), after the model has been exported, select File Open AutoPIPE Batch (*.NTL), locate and open the model (i.e. TEST.DAT) saved above. Step #10 WARNING : After the model has been imported, confirm the entire model to be correct. Check every tab on the Model Input Grids, All Static/Dynamic settings, all load cases added to the model (wind, earthquake, etc..), and most importantly check all settings to be correct under Tools Model Options each and every page (i.e. General, Edit, Results, etc..). All of the items above may have been re-set to the default settings. 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!
↧
↧
Wiki Page: AutoPIPE Powered by ADL PIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: import Subarea: Original Author: Bentley Technical Support Group Questions and answers about the difference between AutoPIPE and ADL PIPE 1. What part of ADL PIPE is used by AutoPIPE? Answer: ADL PIPE was acquired by Bentley in 2005 to provide a good solid ground with which to add a nuclear version of AutoPIPE. The was a perfect marriage of two programs, anyone who has used ADL PIPE knows that the graphical side was lacking but the calculations performed by ADL PIPE were used by industry since the 1969. The nuclear solution routines from ADL PIPE form AutoPIPE's Nuclear solution. 2. What are the major difference between the programs? Answer: See the following: AutoPIPE's ADL PIPE Translator Limitations AutoPIPE doesn't allow the Static Earthquake value to alter from one member to another, ADLPipe does. AutoPIPE can only have one Gravity case, ADLPipe is unlimited and is also unlimited on the number of other load case, where as AutoPIPE has hard load case limits. Some model combination methods are not supported by AutoPIPE. AutoPIPE can only insert springs vertically, ADLPipe can have them in any direction. 3. What should users do after importing a model from ADL PIPE into AutoPIPE? Answer: You should confirm the loadings have come over correctly and that the dead-weight result are the same. Some analysis settings may be set by default in ADLPipe and AutoPIPE and these should be the same (i.e. Tool Model Options General, Edit, Results..). 4. Why are my results different in AutoPIPE from ADL PIPE? Answer: In most common cause, the translated AutoPIPE model is different from the ADL PIPE model (confirm the model listing are exactly the same in both programs). In addition, user's should consider all the information mentioned in the following document that was installed with the ADL PIPE translator: C:\ Bentley\ AutoPIPE Translators\ ADLPipe Translator\ ADLPipe to AutoPIPE Translator User Reference.pdf 5. Has Bentley performed any benchmark calculations to check the AutoPipe values compared to the ADL values?" Answer: As mentioned above, the ADLPipe solver is what we use to drive the nuclear solution. Bentley CAE development team did do some benchmarking between the two products and in the end NRC made us validate AutoPIPE Nuclear separately as essentially the two solutions were the same. There are some standard NRC and ASME verification examples that have been carried out also by both products…ADLPipe back in the 70s mind you! The AutoPIPE Acceptance Test Set (ATS) has some test models to use to verify the installation. Also, AutoPIPE QA&R subscribers have access to more information about the program than normally available. With regard to importing ADLPipe models; this can be done using the ADLPipe translator that they would have downloaded with AutoPIPE Nuclear. It is not as simple as taking the model and opening it in AutoPIPE. There are some limitations and omissions, but on the whole the around 95% translation should be possible. There are going to be differences in the results; the translation process makes certain assumptions and the two applications do many things in slightly different ways including presenting the results; but it should be possible to align them if you know what you are doing. 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!
↧
Wiki Page: Static Earthquake Load Case In AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: loadcase Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about Static Earthquake Load Case In AutoPIPE Item #1, Question: Can the seismic input be explained again in the new version of AutoPIPE V8i 09.06.xx.xx and higher? Answer : Start by selecting load Static Earthquake. By default there is already 1 seismic load case E1, using the mouse change the Seismic Code from User to ASCE 2010, Using the mouse, select the gray box on the left hand side of E1 to highlight the entire row, and press the Modify Selected button: Fill in the fields as required, see online help for details on all fields. Press OK button to enable the application to calculate the gravity factors to be applied to the model for the active load case. Press the New button as required to add additional load cases. Note: A maximum of ten (10) earthquake load cases can be used in a model at any one time. 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!
↧
Wiki Page: •"Non-Code Comb." tab questions
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: combinations Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about Non-code combinations in AutoPIPE Item #1: How to set up a non-code combination to print 0.3*gravity when axial displacement at a support exceeds 1/8" in thermal load case? Answer : We apologize for the inconvenience, but there is no mechanism to have a combination set up based on a value result in another combination. You can filter the output report based on values (see Results Filter Criteria) , but you would still need to manually create the combination that can be enabled to be printed or not (see Tools Combination non-code tab print option). Item #2: I can not get the pressure into my calculation report. I have defined it in the pressure and temperature definition - I ned to make a load combination of GR+T1+P1. Additionally I want to have the loadcase "hydrotest". I need restraint reactions from: P1, Combined GR+T1+P1 and hydrotest. Answer: First create a Hydrotest case using Load Hydrotest, and then under Loads Static Analysis Sets be sure to check ON: Gravity, Temperature, and "Calculate pressure extension cases, e.g. P1, P2, etc". Now create a 2nd analysis set with only Hydrotest enabled. After the analysis sets have been defined, run the analysis and select Tools Combinations non-code comb tab. Note that the GRT1P1 & Hyrotest load case have already been created. Item #3: Can we modify the default Combination Name like "Gravity" to "GW"? Answer: I apologize for the inconvenience, however the default names are hard coded in to the program and cannot be changed. Only option is to create new user combinations that are saved to a combination file (*.CMB) and import them into new models as needed. See online help for "Import Combination File" details and instructions. Item #4: Once a User-Define Combination name is created AutoPIPE does not allow to Modify them. We would like to have the cap ability to rename or modify them. Answer: I apologize for the inconvenience, however the default names are hard coded in to the program and cannot be changed when the User Non-Code or Code Combinations dialog is opened. You have the following options: A. Modify the User Non-Code Combinations names under the column labeled "Combination" in the grid of the Load Combinations dialog. Only the User combinations names can be modified, the default names are grayed out. OR B. Delete an exiting combination and then re-create a new user combinations with the correct name and settings as needed Item #5: In relation with Item #4 above, the User-Defined Combination is always listed last or at the bottom of the list. We would like to have the capability to manipulate the list of Combination such that we can insert the User-Define Name in the list to have an output tailored to our usage or needs. Answer: The combinations dialog requires that the individual load combination be listed before the combination where the load cases will be used in a combination. For example, Non-code combination GrT1P1 can not be listed before each of the other individual load combinations( Gr, T1, or P1). Wrong combination listing: Gr GRT1P1 T1 P1 The correct combination listing must be: Gr T1 P1 GRT1P1 AutoPIPE does export a results database file where the user can modify the reports as desired with a program like MS Access. See online help for export MBF file for details. In conclusion, the development team realizes the user would like a more tailored output report. There are plans for a complete over haul of the report facility to make it more user friendly and easily customizable for the individual user. Please keep an one on our future releases for this feature. However for AutoPIPE V8i 09.06.00.xx and lower Item #6: In order to evaluate the total load from operating conditions and worst case scenario from 6 Static Earthquake load case. The following combinations were created in a model. Static Earthquake load cases: E1 User 0.6280 0.0000 0.0000 E2 User 0.3830 0.0000 0.0000 E3 User 0.0000 0.0000 0.6280 E4 User 0.0000 0.0000 0.3830 E5 User 0.0000 0.2160 0.0000 E6 User 0.0000 0.5040 0.0000 Create user combinations to evaluate all possible scenario of Static Earthquake cases: Trans1[4] = E1+E5 Trans2[4] = -E1+E5 Trans3[4] = E1-+E5 Trans4[4] = -E1-E5 Trans5[4] = E3+E5 Trans6[4] = -E3+E5 Trans7[4] = E3-E5 Trans8[4] = -E3-E5 Trans9[4] = E2+E6 Trans10[4] = -E2+E6 Trans11[4] = E2-E6 Trans12[4] = -E2-E6 Create user combination to find worst case (MAX) scenario from above cases TRANS(POS)= sign Max ( TRANS1… Trans6) TRANS(NEG)= sign Max ( TRANS8… Trans12) TRANS = sign Max [ TRANS(POS), TRANS(NEG)] Create user combintion to evaluate normal operating conditions Func = Gr + T1 +P1 Create user combination to total the loads of Operating and Worst case Seismic load cases TRANSPORT = TRANS + FUNC Is this listing of combination correct, why or why not? Answer: NO, this set of combinations is NOT correct. The problem is because of load sequence, the results of Trans1 - Trans12 cannot be added into other user combinations to find the worst cases scenario. Help topic explains AutoPIPE generates combinations based on the non-linear load sequence only Please see the following AutoPIPE help section: Help Contents Search Tab enter "Add default Non-Code combinations" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information. Non-linear analysis: For non-linear static analysis results, the program will automatically generate combinations based on the load sequences only. For example, if GR is the initial state of T12, and T12 is the initial state of P12, and P12 is the initial state of W10, then the program will generate the combination, GT12P12W10 or GT1P1E10. Combining 2 or more Seismic load cases in a combination is not valid . The seismic cases have to be explicit in different +/- directions. For now using a non-linear analysis looks like for 12 'seismic' loads they will need 2 models where the seismic loads are defined e.g. E1 = trans1, E2 = trans 2, etc.. Otherwise they could run as linear analysis with their existing combinations which would be valid and evaluate TRANSPORT load combination for worse loads and contributing load cases then go back and run a non-linear analysis for this load sequence only Then envelop the linear and non-linear results to capture final maximum. Some users do this for true seismic loading. 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!
↧
↧
Wiki Page: How do I download, install, and license AutoPIPE Vessel 33.02.00.06 on Win 7
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Problem: How do I download, install, and license AutoPIPE Vessel 33.02.00.06 on Win 7 Answer: Bentley AutoPIPE Vessel V8i v.33.02.00.06 release notes Log onto the Bentley Web Site Open internet explorer web site http://selectservices.bentley.com/en-US/ 1. Select “ Software Downloads” 2. Log into web site. If you do not have a current log, in please contact your local Bentley site administrator who can assist you with the correct information and permissions. Download AutoPIPE Vessel 1. In the “ Search By: ” area, Select radio button next to “Product”, and select “ AutoPIPE Products ” from drop down list 2. In the “Filter By” area, “ Files Posted within last ”, change from “6 months” to “ ALL ”. 3. Press the “ Search ” button at the bottom of the web site 4. Select the version of AutoPIPE Vessel to download. Place a check in the box next to the name and confirm that any dependencies have also been selected (Bentley IEG). Note : The following screen shot may show different versions then currently available, but the steps to download are the same. Select a version to download. If you do not see check box next to the applications, you do not have download rights . Contact Bentley BRC or your account manager to discuss your options. Note : Far right column notifies you of the OS for which the application is certified on. Installing the application on any other OS will be at your own risk and will not be supported 5. Scroll to the bottom of the web page, press “ Continue ” button located in the bottom right corner. 6. Select Delivery method, Default Download, you can chose Download or Burn CD (an official CD will be mailed). Press “ Continue ” button 7. Download Procedure Read the Legal Terms of Use statement. If you agree, press the “ Accept ” button. Then press the “ Advanced Download Manager ” button. Provide pathname to download the file to and finally press the “ Start Download ” button. Note : Sometimes users are unable to download software from Bentley SELECTservices website by clicking on the link ‘Download’. Here are the steps which should help: Turn off a pop-up blocker in Internet Explorer by going to Tools - Pop-up Blocker - Turn Off Pop-up Blocker Add www.bentley.com to Trusted Sites in IE by going to Tools - Internet Options - Security - Trusted Sites - Sites Change a security level for this webpage to Low in IE by going to Tools - Internet Options - Security - Trusted Sites - Custom level… and change drop down list to Low. 8. Burn DVD(s) Procedure Select the “ Continue ” button, provide shipping information, and press the “ Complete ” button. Other applications required to complete an installation: 1. Select Server V8 XM 2. Bentley IEG (only required for XM licensed applications that do not support trust licensing) Install AutoPIPE Vessel V8i 33.02.xx.xx Note : contact your IT department to be sure that there is no user restrictions for installing software on your computer system. If so, request IT assistance. The Following procedures assumes: Select Server XM has been install and configured, If not please contact the license group to assist you. Person is logged into the computer has full Administration rights . Installing on Window 7. Install AutoPIPE Vessel V8i while accepting all the default settings. Prefer that the application is not installed over a network connection; suggest that the EXE file is on the users system before starting the installation. All previous versions of AutoPIPE vessel have been removed from the computer prior to this installation. Anotherwords, completely uninstall all previous versions of AutoPIPE Vessel before proceeding. 1. Navigate to the apvs33020006en.EXE file downloaded using the procedure above. 2. Double click on on the *.EXE to start the installation process. The following are typical screen shots and responses for a default installation: Set-up License There are two methods for License activation: automatically with the Product Activation Wizard, or manually using License Management Tool. Method #1: Automatically with the Product Activation Wizard The following screen is automatically displayed after AutoPIPE Vessel is installed: 1. Choose the correct Setting and press Next 2. Enter the correct Site Activation Key and press the Test Connection button, the Sever and Activation key should be verified, before continuing. NOTE : If you do not see Activation screen is verified contact Bentley Licensing department for assistance. 3. Select a country and Press the Next button 4. Verify the settings are correct and press the Finish Button: 5. If all they settings were correct the following is displayed: Ultimately the following is displayed: You are now finished with AutoPIPE Vessel install !!! Review Licensing before starting the program for the first time Select Start Bentley Engineering AutoPIPE Vessel License Management Tool Look at the column next to the version of AutoPIPE trying to license, see the following image: Is the value = 0 ? If the value is = 0, then you cannot use this version of AutoPIPE Vessel as it does not have a valid license. You may consider increasing your pooled license, contact your Bentley Account Manager for options and pricing, Or Contact Bentley license team to help locate the user who has the license checked out. Is the value 0 ? If the Value is greater than 0, therefore a license is available for the application. If AutoPIPE Vessel is not listed: When looking at the listing on your computer the application, AutoPIPE Vessel, is not listed as shown above. Use one or more of the following to resolve: a. Select Tools Options Confirm the Server name and Site activation keys are correct. If not, correct as needed and refresh the listing Hosted server name = selectserver.bentley.com Activation Key = (contact Bentley License team to verify) b. Select Tools Options Press the test connection button, the following should appear --------------------------- SELECTserver --------------------------- SELECTserver and Activation Key verified. --------------------------- OK --------------------------- if not, then your computer is not connecting to the server location, check the server name and activation key again or Internet connection may be down. c. Contact the onsite Bentley Administrator to check if there is any check out restrictions for that user and / or application on the select server. Start the Program - AutoPIPE Vessel Start the program by selecting the desktop Icon, or by selecting: Start Button Program Bentley Engineering AutoPIPE Vessel AutoPIPE Vessel. If everything was correctly installed and licensed the following should be displayed, select a valid license option per the available licenses indicated above and press OK button to use the program: Contact Bentley License Team If your application is not licensed correctly due to License Management Tool issues, please contact the Bentley License department to verify your account status. US - (800) 778-4277, opt 1, opt 2 Europe, Middle East, and Africa (+31) 023 5560555 Asia-Pacific +61 3 9697 8637 Troubleshooting: 1. If revert to demo, Verify license is correctly displayed in LMT. Note, in LMT press F5 to refresh the listing. Verify the internet connection and server connection. Verify Select Server XM Dashboard Settings (i.e. Application restrictions, user restrictions, etc...) http://selectserver.bentley.com/bss/admin/ 2. The following is displayed: Answer: The program is in Demo Mode, correctly license the application. From within AutoPIPE Vessel select File License Settings choose a radio button that allows the use of the function trying to analyze under. 3. The following is displayed when running application: Answer: The problem is that you do not have the correct license available to use this feature of the program. From within AutoPIPE Vessel select File License Settings choose a radio button that allows the use of the function trying to analyze under. 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!
↧
Wiki Page: Model a Ring Main (circular header) with AutoPIPE
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 related to modeling a ring main pipe (circular header) Item #1: Can AutoPIPE model a Ring main (circular header)? Answer: From AutoPIPE online help: Insert Ring AutoPIPE supports the insertion of ring mains into the piping model through the use of the Ring Main Wizard. The Insert Ring dialog is a two-step wizard. The first page of the wizard contains general properties regarding the ring. The second page contains the ring's specific properties. The ring is drawn in a counter-clockwise direction relative to the radial vector. To reverse this, simply place 180 in the Radius field. Notes: 1. Rings can only be placed on run points. 2. Certain elements of this wizard will create new segments in the model. Close Ring, Create new segment and a tee Branch Type will create new segments each. Item #2: I do not understand the ring orientation field, can you provide more information? Answer: Better explained with and example: With a segment going in the +Dy axis (vertical up) direction. Place a ring on top using the following entries: Ring orientation = 0 deg Create New segment = checked ON Radius = 5.0 ft Close Ring = checked ON Offset = Dx = 0, Dy = 5 feet, Dz = 0 feet Press Next button, Ring type = Circular Ring Number of Angles = 4 Press Finish button As a result the following rings is created, Perform the same procedure above, but index the Ring Orientation by 45 deg (i.e. 0, 45, 90, 135, 180). Notice how the ring is rotated about the vertical axis (Offset axis direction) with a counter clockwise rotation. Perform the same procedure above, but change the Offset = Dx = 5, Dy = 0 feet, Dz = 0 feet and index the Ring Orientation by 45 deg (i.e. 0, 45, 90, 135, 180). Again notice how tthese changes affect the ring creation: Hint: Imagine your eyeball is looking directly back along the axis created by the Offset direction values. Typically the Ring Orientation will start at 12:00 o'clock, rotating CCW per the value entered (i.e 90 deg = 9:00 - 3:00, 135 deg = 7:30 - 1:30) Item #3 When creating a ring main, some runs were added that crisscrosses the ring main and added tees where not desired as shown bellow: How to resolve of fix this issue: Answer: With AutoPIPE V8i 09.06.xx.xx and lower the development team was able to determine that there was an issue with naming, where duplicate point names get generated and system converts them to tee while running a consistency check. Currently AutoPIPE Alpha-Numeric point name can contain up to 4 characters where the segment name is also included in point name. This segment name can be one or two characters. Any new segment created with a two character name leaves AutoPIPE to use only two characters for point number in alphanumeric convention. This problem can be further compounded by increasing the name offset to a larger number (ex. Tools- Model Options- Edit Default point name offset (0=none) = 5 ). This way every point name will have a numeric part with offset of 5. e.g. JJ00, JJ05, JJ10…. This format limit AutoPIPE alpha-numeric with only 19 point names per a segment. In the following ring segment was created with 72 points (5 degrees bend per point) while creating the ring of Radius 6.5 ft and 90 deg orientation angle. The point names generated as described above are causing issue. The development team is looking into a fix to avoid any point name duplication in such a scenario. The workaround at the moment for Alpha-numeric naming convention is limit the name offset = 1 (default), and then generate the ring with the new enhancement tool. 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!
↧
Wiki Page: ASME B31.4 Piping Code Calcualtion Issues
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Calculations Subarea: Original Author: Bentley Technical Support Group Comment, Questions, and Answers about ASME B31.4 code calculations in AutoPIPE Item #1: Question, We don't understand the way the expansion stress is checked according to the last revision of ASME B31.4, because we don't understand the resulting allowable stress: based on paragraph 403.3.2 of ASME B31.4 it should be as below, but it doesn't appear to be applied in AutoPIPE. Further, in AutoPIPE online manual (toolbar) the expansion stress is still the same of very old releases (it is referred to a paragraph not more available in ASME B31.,4). it will be very appreciated if You give us an explanation on how AutoPIPE calculates the allowable expansion stress for ASME B31.4 Ed. 2012. Answer: For B31.4 (2009 and higher) AutoPIPE does calculate the unrestrained expansion allowable as per clause 403.3.2 explained below for AutoPIPE: SA=f[1.25(Sc+Sh)- SL] Where: SA = Allowable expansion stress f = Fatigue factor (defined as "Range reduction factor" on Result Model Options dialog) Sc = 2/3 * Sy (Sy is the minimum yield defined on Pipe Properties dialog) Sh = 2/3 * Syt (Syt is the yield value at each temperature case, updated on pressure and temperature dialog) SL = Sustained stress for unrestrained lines Item #2: Question: For ASME B31.4, why are the fields "Use nominal thickness" and "Use nom. Thk. for Hoop" unchecked in AutoPIPE V8i 09.06.00.15? Answer: This is correct and our implementation is inconsistent with our online help as well. A new enhancement ( TFS-75309 ) has been logged to update the online help. Item #3: Question: Using AutoPIPE V8i 09.06.00.15, with ASME B31.4, on the input grid Piping Restraint tab shows, stress equation column: On Tools Model Options Results : Answer: The Xtra Data option Piping Restrain is only used to control which combinations are displayed on the output report, result grid and interactive scan. AutoPIPE classifies certain equations as Restrained, and others and unrestrained and performs the calculations accordingly. When the Result Model Option "Use rest. long. code eq." option is checked, AutoPIPE then uses the exact code equation to calculate the Longitudinal stress regardless of the support configuration and actual forces. Item #4 If I follow the above information, I could set "Restrained" and don't check "Use rest. Long. Code eq." without any warnings … this seems to be illogical. Answer: The restrained / unrestrained / Equivalent / Show Both Xtra Data options are only used for controlling which code combinations shall be displayed on the output report. These options do not affect the calculations performed for the combinations. The Result Model Option "Use rest. Long. Code eq." however, decides how the longitudinal stress values are calculated for restrained code combinations like "Rest-Fun" and "Rest-Env". If this option is checked, the axial expansion stress would be calculated as prescribed by the code i.e. E*alpha*dT regardless of the pipe being fully restrained or not based on actual support (soil) stiffness values. If however, this option is unchecked, then AutoPIPE uses the actual thermal forces developed due to the actual restrain conditions. Also, if checked, AutoPIPE will use a value of v*Hoop stress for calculation of longitudinal pressure stress. Item #5 What is the procedure to apply if we want to consider the Von Mises (maximum distortion energy theory) combination? Answer: To be able to see all the combinations, use the XTRA DATA option "Show Both" to enable AutoPIPE to show all types of equations. Also, using Equivalent will allow user to see the equations as were available in earlier editions like B31.4 (2006). Hope this helps. Please thank the user from our side for taking the time out to point these issues out to us, we appreciate that. Item #6 Request an option to choose Von Mises criterion or Tresca criteria since ASME B31.4-2012 admits to use both: Answer: You may be able to do that today. The default code category "Tensile" generates the results based on Tresca criteria. However, if you change the category for the default Tensile code combination or create a new code combination with category selected as Von mises, you would be able to get your Von mises criteria stresses (with no allowable associated however). To be able to do the same with the restrained functional category, you may use the Total Stress option on the Result Model Options to get your stress results based on either Von mises or Tresca criteria. 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!
↧
Wiki Page: ASME B31.8 Piping Code Calcualtion Issues
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: calculations Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers about ASME B31.8 Piping Code Calculation Issues Item #1, Question: 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, Question: 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, Question: 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, Question: 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). Item #5, Question: 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 stresses due to pressure , temperature and gravity . can any one help ? Answer: from Karim Rinawi AutoPIPE forum response: https://communities.bentley.com/products/pipe_stress_analysis/f/275801/t/93651.aspx In most cases these initial stresses are ignored as are circumferential weld stresses. Similarly, for buried pipe the overburden soil load will add stresses which often are analyzed separately. These overburden stresses were recently supported in AutoPIPE for some codes in which case they are added to other sustained stresses In addition to additional checks to insure that the pipe will not buckle under the soil load alone. It is worth pointing out that the overburden stresses act against the initial cold bending stresses. The way to account for the elastic bending stresses is to calculate them manually and add them to the sustained stress. The moment created by bending can be calculated by E.I/R where E is the elastic pipe material modulus, I is the pipe moment of inertia and R is the bend curvature radius. You can build a simple cantilever pipe model and apply this moment to the free end in a User case to get the cold bending stress. This bending stress can then be manually added to the maximum sustained stress in the long radius bend and the results compared to the sustained allowable. Note that you may not need to add it to expansion stress range since this is a one time event and would not reverse. However it can be added to operating cases as in B31.3 Appendix P, if that option is being used. You can also calculate the cold bend stress using a pipe with two rigid anchors on both sides and apply a rotation equal to pipe span length times divided by bend radius or theta = L/R in radians which can be converted to degrees. This rotation is applied to one of the end anchors under U1 user case. Item #6, Question: I have in the past set up my own load combinations for the Hydrotest case - GR T3 P3 (Functional) and use the Hoop stress values for my reports. This gives me 118.54 MPa. For a change, I thought that I would give the default Hydrotest load case a try and but it gives me a different value of 148.17 MPa. Now when I just do a pure Hoop stress calculation (Pd/2t), it gives me another different result of 134.19 MPa. I am trying to understand why these 3 values are different Answer: Please see the following AutoPIPE help section: Help Contents Contents Tab Reference Information Code Compliance Calculations ASME B31.8 Chapter VIII - 2010 for calculations used in AutoPIPE. pay special attention to the hoop stress calculation. in this case, the Hoop stress hand calculation use Dmean (PDmean/2t) and with the correct values for pressure factor in the Hydrotest load case so all stress values match now. 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!
↧
↧
Wiki Page: Import AutoCAD DWG / DXF into AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Import / Export Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers with importing AutoCAD data with AutoPIPE Item #1: Can AutoPIPE import a AutoCAD DWG or DXF file? Answer: The quick answer is no AutoPIPE can not import a DXF or DWG file format. However, AutoPIPE V8i v.9.5 and lower can copy-clip X-Y-Z coordinates into the input grids. While AutoPIPE V8i v.9.6 and higher can actually import an MS Excel file generated from AutoCAD 2012 and higher. Using AutoPIPE V8i v9.5 and lower: See the following video and attached document: a. http://screencast.com/t/2TBueIj0Oq b. Copy AutoCADD X-Y-Z cords to AutoPIPE.pdf You can model any length of pipe line as long as the model database does not exceed the 10,000 node point limitation. Using AutoPIPE V8i v9.6 and higher: This version has not been released, expecting in Q3 2013. See the following document for new feature and procedure to import a AutoCAD model into AutoPIPE. Import Coordinates - ACAD Workflow.pdf Item #2: 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!
↧
Wiki Page: Export AutoPIPE model to AutoCAD (DXF)
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 with exporting AutoPIPE DXF file to AutoCAD Item #1: We just received a piping model from a customer. We want to insert into the AutoPIPE file into our AutoCAD Civil 3D model. However, the model is Bentley Proxy Entity. I cannot explode or do anything with it. Please advise on how to solve this problem. Answer: Suggest the following procedure: a. Open the model in AutoPIPE V8i and View the entire model on screen Note: Only the pipe or beam points displayed within the current plot view port are saved to the DXF file. And the following rules apply if components lie within the current view port : - Any one of the pipe end points of an element. - Any one of the beam nodes on a beam element. - Base point of supports, Xtra data and anchors. b. Select File Export AutoCAD (DXF) command, save the file to a folder location. c. Start AutoCAD, select DXFIn, select the file saved in the previous step to be opened in the program. d. The model is now imported into the program with full controls over layers and piping elements. In AutoPIPE, the user has control over the model symbols and names of the layers. For complete details please see the following AutoPIPE help section: Help Contents Search Tab enter "Generating a DXF file" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information. Be sure to click on the "AutoCAD / DXF related topics" near the bottom of the page to see additional information about the drawing symbols, layers, and drawing 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!
↧
Wiki Page: Import and Export - AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Import / Export Subarea: Original Author: Bentley Technical Support Group Comments, Questions, and Answers on Importing / Exporting with AutoPIPE Item #1, Question: 1. What file formats can AutoPIPE Import/Export? 2. Is there any information on AutoPIPE Translators ? Item #3, Import Issues: AutoPIPE CAD To Stress Integration ADLPipe Translator CAESAR (cii) or Areva PDMS (cii) PCF Translator STRAIT Translator AutoCAD (DWG) / (DXF ) AutoPlant / OpenPLANT (PXF ) Export from ProStructures to AutoPIPE Import AutoPIPE (DAT) model Insert Model From STAAD Using PipeLink Can AutoPIPE V8i Import / Export Bentley HAMMER loads? Import PlantSPACE (PSDS) model into AutoPIPE Import CAEPipe or Kpipe into AutoPIPE When using Import or copy & paste technique into an existing AutoPIPE model, not all points are connected. Item #4, Export Issues: Export AutoPIPE Batch (NTL) Interface bewteen Projectwise and AutoPIPE AutoPLANT (PXF) - Geometry/Results AutoCAD (DXF) Caesar II neutral (*.cii) Isogen (*.pcf) JSpace Model (*.jsm) DGN Model (*.dgn) Export to LiCAD (*.txt) Input Database (*.mdb) Results Database (*.mdb) Nozzle Loads to AutoPIPE Nozzle Model to STAAD Using PipeLink (*.pipelink) I-model 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!
↧
Forum Post: RE: sustained stress
Hello Ball, Does Karim's response answer your questions? 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.
↧
↧
Forum Post: RE: Pipeline lowering calculation, Either in service or instalation
Hello Nassir -07, Does Karim's response answer your questions? 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.
↧
Forum Post: RE: Convergence , Failed to converge
Hello Kola, in addition to Karim's comments, please see the following AutoPIPE help section: Help Contents Search Tab enter "fail to converge" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information. There are 4 suggestions to help this kind of issue. 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.
↧
Wiki Page: How to automatically find the MAX load case from a group of load cases in an AutoPIPE model
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Combinations Subarea: Original Author: Bentley Technical Support Group Problem: In order to evaluate the total load from operating conditions and worst case scenario from 6 Static Earthquake load case. The following combinations were created in a model. Static Earthquake load cases: E1 User 0.6280 0.0000 0.0000 E2 User 0.3830 0.0000 0.0000 E3 User 0.0000 0.0000 0.6280 E4 User 0.0000 0.0000 0.3830 E5 User 0.0000 0.2160 0.0000 Create user combinations to evaluate all possible scenario of Static Earthquake cases: Trans1 = E1+E5 Trans2 = -E1+E5 Trans3 = E1-E5 Trans4 = -E1-E5 Trans5 = E3+E5 Trans6 = -E3+E5 Trans7 = E3-E5 Trans8 = -E3-E5 Create user combination to find worst case (MAX) scenario from above cases TRANS(POS)= sign Max ( TRANS1… Trans4) TRANS(NEG)= sign Max ( TRANS5… Trans8) TRANS = sign Max [ TRANS(POS), TRANS(NEG)] Create user combination to evaluate normal operating conditions Func = Gr + T1 +P1 Create user combination to total the loads of Operating and Worst case Seismic load cases TRANSPORT = TRANS + FUNC Is this listing of combination correct, why or why not? Answer: NO, this set of combinations is NOT correct. The problem is because of load sequence, the results of Trans1 - Trans12 cannot be added into other user combinations to find the worst cases scenario. Help topic explains AutoPIPE generates combinations based on the non-linear load sequence only Please see the following AutoPIPE help section: Help Contents Search Tab enter "Add default Non-Code combinations" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information. Non-linear analysis: For non-linear static analysis results, the program will automatically generate combinations based on the load sequences only. For example, if GR is the initial state of T12, and T12 is the initial state of P12, and P12 is the initial state of W10, then the program will generate the combination, GT12P12W10 or GT1P1E10. Combining 2 or more Seismic load cases in a combination is not valid. The seismic cases have to be explicit in different +/- directions.\ For now using a non-linear analysis looks like for 12 'seismic' loads they will need 2 models where the seismic loads are defined e.g. E1 = trans1, E2 = trans 2, etc.. Otherwise they could run as linear analysis with their existing combinations which would be valid and evaluate TRANSPORT load combination for worse loads and contributing load cases then go back and run a non-linear analysis for this load sequence only Then envelop the linear and non-linear results to capture final maximum. Some users do this for true seismic loading. Based on the setting s above, recommend the following corrective procedure: A. Update the defined Static Earthquake cases to match the intention of Trans1...Trans8, as followed: E1 User 0.6280 0.0000 0.0000 E2 User -0.6280 0.2160 0.0000 E3 User 0.6280 -0.2160 0.0000 E4 User -0.6280 -0.2160 0.0000 etc.. B. Because the load case scenario will be evaluating, Gravity + Press +Temp + Seismic, change the default load sequence: Load Static Analysis Set open analysis set to confirm all pertinent load cases are checked ON, "Gaps / Friction / Soil" setting is checked ON, press OK button, and change "Initial case for Occ. loads" from GR to OP1 (see online help for details on this setting), and press OK button to close dialog screen. C. Run analysis D. Select Tools Combinations i. Code Combination Tab: After opening this tab, noticed that AutoPIPE had automatically created the following operating load cases GRTP4+E1, GRTP4-E1, etc.. In order to configure AutoPIPE to evaluate a group of load cases (10 max per combination) and determine which one is the worst case, create the following user combination: Note: each of the load cases has M/S = S (stress), this combination would not be valid if one or more combination had M/S = M (moments). Create as many grouping combinations (ex. Max Stress 5-8) as necessary to evaluate all the combinations, max 10 at a time. The following is an example of the next group to be evaluated: Finally, evaluate the actual group combinations as shown below: ii. Non-Code Combination Tab: After opening this tab, noticed that AutoPIPE had automatically created the following operating load cases GT4P4E1{4}, GT4P4E2{4}, etc (see online help to understand why GT4P4-E1(4) type comb. are not created for non-linear analysis). In order to configure AutoPIPE to evaluate a group of load cases (10 max per combination) and determine which one is the worst case, create the following user combination: Note: the different Combination method used for non-code combinations, Res. Max, see online help for details on this option. E. After all the correct combinations have been created, Press OK button to close the combination dialog screen F. Review the combination results in the Results grids or Output report. 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!
↧
Wiki Page: "Code Comb" tab Questions
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group The "Code Compliance" grid displays the combination set defined for piping code compliance (both the default combinations and user-defined sets). Any default code combination may be modified, deleted or reset and any new user combination created and modified in the same grid. User Code Combinations dialog Comments, Questions, & Answers: Item #1 I wish to define the allowable hoop and longitudinal stresses for a user code combination that i have set up. Answer: Per the online help: The Allowable Stress field on the "Code Comb." tab of the Load Combinations dialog enables the user to define the allowable stress for any Code Compliance combination directly. Select Tools Combinations Code Comb. TAB, uncheck and modify the values in the Allowable Stress column. Notes: This field is only enabled when the "Auto Update" check box option is disabled (checked OFF). Item #2: What is the M/S column for? Answer: under construction Item #3: When creating a new User defined combination on the Code Comb tab, is the order of the load cases / combinations of any consequence? Answer: Press the NEW button to create a new user code combination. This will display the following dialog screen: Where the user can add up to 10 load cases and combinations to create a new combination. There is NO consequences to order of load cases like that used with a Non-linear analysis. Item#4: Per AutoPIPE's online help for ASME B31.3 - 2008, Stresses Due to Occasional Loads, equation I.4-4 indicates that AutoPIPE first calculates the SRSS of the occasional load moments, and adds the result to SL . How does AutoPIPE know which of the loads in the “User Code Combination” window is to be considered an Occasional Load(s)? as I want to combine the effects of (SUS) + Wind + Ice load in a new user combination where "U1" load case is a Sustained Load and I only want "W1" load case to be an Occasional Load used in the calculation of Mio and Moo in the equation. How can I control this? Answer: As mentioned above, all basic load cases, e.g. GR, T1, W1, U1 etc have only moment results and hence (S) does not apply. Suggest creating a new combinations where the ice load (U1) is added to the SUS load case: Then create a combination combining the effects of (SUS+Ice) + Wind: Where the stresses (Sus and Ice) are added into the equation under S and the occasional W1 moments are summed by SRSS in the code equations: Item #5: Are predefined stress category maximums [i.e. (LONG), (Sus), (exp), (0cc), (hoop) ] calculated across all analysis set regardless of load cases turned ON / OFF in any one analysis set? Answer : The short answer is, YES. It is based on all load cases configured in the model. However, there is a way to force the program to utilize a specific load case for calculating the predefined stress category maximums [i.e. (long) ] for each analysis set. Please see the NOTES written on the following AutoPIPE help section: Help Contents Search Tab enter " Case/Combination List (Standard)" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see more information. Note: A. To become more comfortable with user combinations, create example model(s) with one or more analysis sets with one or more "Number of operating load conditions" in each analysis set. Review the results from the different model s to understand specific user combinations. May need to create a user combination with only 1 load case to see what results are being used by the program. Example, code Combination name = long, see image below: B. If pressure extension analysis is turned on, and the result model option "Include axial, Pcase in Sus" is also turned on, then the forces and moments from pressure case shall be incorporated while calculating sustained stress. Item #6: Advise how to get the range of T1, T2, T3, ...,Tn thermal load cases. The option RANGE is missing from actual AutoPIPE Capabilities (Combination Method). Answer: From the online help: The program will automatically create a special code combination called "Max Range" that stores the results of the maximum thermal range stress case, e.g. T1 to T3, including thermal ranges from ambient temperature, e.g. Amb to T1. This option is useful when the maximum expansion stress due to thermal range loadings only is required rather than generating every thermal range code combinations explicitly. In order to see all the thermal ranges, select "Tools Model Options Results "No. of thermal ranges" option (see image below). In addition see online help for details on these options. After the settings are enabled with the correct number of thermal cases, these load combinations will be available for inclusion into other combinations as required. Item #7: How to automatically find the MAX load case from a group of load cases in an AutoPIPE model Item #8 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!
↧
↧
Wiki Page: Enhancements logged for ASME BPV-III-1-NB, NC, & ND in AutoPIPE:
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: settings Subarea: Original Author: Bentley Technical Support Group The following ASME BPV-III-1-NB, NC, & ND enhancements have been logged for inclusion into a future version of AutoPIPE: Notes: A. if an enhancement has not already been added to the program, log an enhancement request with the respective CAE number. The more requests per an enhancement, the quicker the CAE development team will add that feature to the program. B. Regardless of what code version is available, the NRC designs are only approved to what code version, see link: http://www.nrc.gov/reading-rm/doc-collections/cfr/part050/part050-0055a.html 1. CAE-CR-6978 Update ASME NB NC and ND code to 2008 addenda Description: Up date the ADLPipe ASME routines to 2008 addenda codes (2007 clean code). Development Project: TBD 2. CAE-CR-11110: Provide functionality to add multiple range reduction factor for ASME NC/ND Description : Currently AutoPIPE only provides the user with a single value of range reduction factor to be defined under Result Model Options for ASME NC/ND. It is required that the user should be able to define range reduction factor based combination or load case. The option for the user to be able to provide number of cycles instead of range reduction factor can also be implemented. Internally AutoPIPE would convert the number of cycles to range reduction factor. Development Project: TBD 2. TFS Enhancement 71139: 2013 ASME NB Code Development Project: TBD 3. TFS Enhancement 74287: Select equation 10a in the stress summary Development Project: TBD 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!
↧
Wiki Page: Piping Code Calculations - AutoPIPE
Applies To Product(s): AutoPIPE, Version(s): 2004, XM, & V8i Environment: N/A Area: Subarea: Original Author: Bentley Technical Support Group Item #1: Be sure to review the following AutoPIPE online help information: Help Contents Contents Tab Reference Information Code Compliance Calculations This area describes variables, equations, and methodology used by AutoPIPE to produce output reports per the code associated with the piping system database. AutoPIPE is capable of generating actual and allowable stresses for each of the applicable stress categories (depending on the current, analyzed load cases) for all codes listed below. Please Note: The Standard edition only has access to 4 ASME codes and European code EN13480 as shown in the Getting Started topic "AutoPIPE Standard vs Advanced vs Nuclear". Select the Pipig code hyperlink below for general questions on the respective code calculations. Note: additonal hyper links are added as new information is presented. ASME B31.1 Power Piping ASME B31.3 Process Piping ASME B31.4 Liquid Transportation Systems for Hydro-carbons, Liquid Petroleum Gas, Anhydrous Ammonia, & Alcohols ASME B31.8 Gas Transmission & Distribution Piping Systems ASME B31.4 Chapter IX Offshore Liquid Piping Systems ASME B31.8 Chapter VIII Offshore Gas Transmission ASME BPV-III-1-NB Boiler & Pressure Vessel Code, Rules for Construction of Nuclear Power Plant Components Division 1, Subsection NB, Class 1 Components ASME BPV-III-1-NC Boiler & Pressure Vessel Code, Rules for Construction of Nuclear Power Plant Components Division 1, Subsection NC, Class 2 Components ASME BPV-III-1-ND Boiler & Pressure Vessel Code, Rules for Construction of Nuclear Power Plant Components Division 1, Subsection ND, Class 3 Components JSME S NC1-PPC Rules on Design and Construction for Nuclear Power Plants, Class 2 Piping BS806 Design and Construction of Ferrous Piping Installations For and In Connection with Land Boilers SPC Swedish Piping Code, Code for Piping in Stationary Plants (Stress Analysis - Method 2) TBK5-6 Norwegian Pressure Vessel Committee, General Rules for Piping Systems STOOMWEZEN (D1101) Dutch Piping Rule D1101 of the Rules for Pressure Vessels CAN/CSA-Z662 Canadian Standards Association, Oil and Gas Pipeline Systems DNV Norwegian Piping Code, Rules for Submarine Pipeline Systems MITI501 Technical Standards for Construction of Nuclear Power Plant Components - MITI Notification No. 501 KHK Level 1 KHK E 012 Japanese Piping Code for Seismic Loads, Level 1 KHKLevel 2 KHK E 012 Japanese Piping Code for Seismic Loads, Level 2 EN13480 EN 13480 European Standard for Metallic Industrial Piping RCC-M French Piping Code SNCT French Piping Code SNiP Russian Trunk Pipelines Code BS7159 Design and Construction of Glass Reinforced Plastics (GRP) Piping Systems for Individual Plants or Sites ISO 14692 Petroleum and Natural Gas Industries, Glass-Reinforced Plastics (GRP) Piping General General Piping Code Item #2, Question: Why does AutoPIPE ignore axial force in most of the code equations? Answer: Confirm the model is considering axial force, as this option by default is turned OFF. See Tool Model Options Results "Include axial force" option Excerpt from online help: The piping codes ignore the effect of axial force for calculating stresses in the sustained and occasional categories (only bending moments are considered, see Code Compliance Calculations). This option has been provided to allow the inclusion of axial force effects. By default this option is unchecked.... See online help for more information on this option. item #3, Question: Our Project Design Specification calls for ASME II 2010 for Material and ASME III 2007 with 2008 addenda for Rules for construction of nuclear facility components. However, there is no exact selection of ASME III Code year within AutoPIPE. Please advise the appropriated setup for ASME III Nx Stress analyses with above described Code year. Answer: AutoPIPE V8i 09.06.xx.xx and lower has the following nuclear codes for selection: ASME BPV-III-1-NB (1972 - 2007) Boiler & Pressure Vessel Code, Rules for Construction of Nuclear Power Plant Components Division 1, Subsection NB, Class 1 Components (1972 + 1972 W addenda, 1974 + 1975 W addenda, 1977, 1980 + 1982 W addenda, 1983 + 1983 W addenda, 1986 + 1988 addenda, 1989, 1989 + 1989 addenda, 1992 + 1994 addenda, 1995 + 1997 addenda, 1998, 2001, 2004, and 2007) ASME BPV-III-1-NC (1972 - 2007) Boiler & Pressure Vessel Code, Rules for Construction of Nuclear Power Plant Components Division 1, Subsection NC, Class 2 Components (1972 + 1972 W addenda, 1974 + 1975 W addenda, 1977, 1980 + 1980 S addenda, 1983 + 1983 W addenda, 1986 + 1988 addenda, 1989, 1989 + 1989 addenda, 1992 + 1994 addenda, 1995 + 1997 addenda, 1998, 2001, 2001 + 2003 addenda, 2004 and 2007) ASME BPV-III-1-ND (1972 - 2007) Boiler & Pressure Vessel Code, Rules for Construction of Nuclear Power Plant Components Division 1, Subsection ND, Class 3 Components (1972 + 1972 W addenda, 1974 + 1975 W addenda, 1977, 1980 + 1980 S addenda, 1983 + 1983 W addenda, 1986 + 1988 addenda, 1989, 1989 + 1989 addenda, 1992 + 1994 addenda, 1995 + 1997 addenda, 1998, 2001, 2001 + 2003 addenda, 2004 and 2007) As you can see there is currently no 2007 + 2008 addenda edition. This enhancement has already been logged under CAE-CR-6978: "Update ASME NB NC and ND code to 2008 addenda" and will be included in a future build of the application. Please review the code as there is not much difference between 2007 release. With regards to which code to select from the Tools Model options General Piping code drop down listing, due to liability law suits Bentley TSG is not at liberty to dictate what piping code / year should be used in your model. That is for you to determine. Recommend reviewing the possibility of using ASME NB, NC, or ND piping code. Most of the material data in the libraries associated with the Nuclear Piping codes has come from ASME BPV-III. Please see the online help for details of what code year. Help Contents Search Tab enter "BPV-III" (include the quotes), press List Topics button, double click on the selected topic from the list provided to see 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!
↧
Wiki Page: Autopipe Vessel - Error Message/Troubleshoot
Applies To Product(s): AutoPIPE Vessel Version(s): Environment: N/A Area: Subarea: N/A Original Author: Sudip Ganguly, Bentley Technical Support Group 1. Problem Description Why do I get the error message "the results file cannot be written to" when I run the "strength calculations"? Reason It is probably because a report generated from a previous run is already open. Solution Close the report (the word document) that is already open and try running "strength calculations" again. 2. Problem Description I have selected APVessel as the design standard for bracket but the program is crashing, how do I resolve this issue? Reason The issue has been acknowledged and is under investigation. It will be fixed in future release of AutoPIPE Vessel. Solution Currently there is a workaround for this problem. Please see the following link for the solution: http://communities.bentley.com/products/pipe_stress_analysis/m/pipe_stress_analysis_gallery/269463.aspx 3. Problem Description How to resolve the following error message? “Design code required isn’t part of your license” Solution Please see the following link: License resetting
↧