Under Result Model Options "Inc. Axial, Pcase in Sus:" consistently toggles to off if the Code year is changed from B31.1 2018 to 2020 or vice versa.
While analyzing a piping system with an untied expansion joint and very large pressure thrust, we observed a significant reduction in sustained bending stress at a particular elbow after we updated the Code from 2018 to 2020.
We found that the program was turning off "Inc. Axial, Pcase in Sus:". The "Calculate pressure extension cases...." option remained selected in the Static Analysis Load Case set so we assumed that pressure extension was properly being calculated, but it was not included.
We have not conducted further testing for other ASME Codes or years, but suggest that Bentley investigate that as well.
Greetings,
The program is working s designed. The development team must determine default states for numerous setting throughout the program per piping code and year selection. When a user starts a new model or modifies the piping code and year selection, all the settings are updated to these default states. Before running an analysis the user is responsible for reviewing all applicable settings changing them from their default states as needed for their models' requirements.
When creating Analysis sets where "Calculate pressure extension cases, e.g. P1, P2, etc" was enabled, the following message is displayed:
---------------------------Confirm--------------------------- To properly add pressure extension to sustained stress, the result option 'Inc Axial, Pcase in Sustained' must be checked. Do you wish to enable this result option?---------------------------Yes No Cancel ---------------------------
This is an option for the users to consider and not a requirement. Therefore, when changing the piping code year settings all of the default states are used. Again, the user is responsible for reviewing all applicable settings changing them from their default states as needed for their models' requirements.
Remember AutoPIPE is used by many people around the globe in many different industries. Therefore, a default setting for you may not be a default setting for others. Suggest to review and use AutoPIPE command "Save Defaults" (Tools > Model Options > Save Defaults). Note, this command will only be applied to new models created and not used when making modifications to the piping code settings after model creation.
Regards, Mike Dattilio Design Analysis Engineering Group Senior Analyst Bentley Systems Inc=============================================================================