You are currently reviewing an older revision of this page.
is there any way to see and modify the flexibility factors calculated by AutoPIPE for B31.3 code bends or tees?
Answer:
Yes and No. Open the model in AutoPIPE, select Tools> Model Input listing> check all sub reports ON and press OK button to create the report. Scroll down to the Bend sub report. Noticed that the flexibility values calculated by the program are displayed.
Open the model input grids, select the Bend tab to change the bend flexibility values as needed:
Bentley apologizes for the inconvenience, but at this time (AutoPIPE V8i 09.06.xx.xx and lower) does not have the ability to view or modify the flexibility factor for a Tee type connection. According to some piping codes, B31.1 and B31.3, APPENDIX D, most tee configurations the flexibility factor = 1.0 (please review the code).
Workaround, apply a user defined SIF at the TEE that takes into consideration a user defined flexibility factor for a Tee.
How can I adjust the SIF of a bend?
There is no entry to change the SIF of a selected bend as can be done with a TEE. Use the following procedure to adjust the SIF of a bend:
1. Select the Bend:
2. Select Insert> Xtra Data> Joint Type and user SIF> a new dialog will appear, select the correct weld type or choose "User Define" from the listing and enter the SIF values. In addition, enable the check-box "Override all other SIFs at this point" (see online help to fully understand this setting) :
3. To verify the settings, select the Tool bar button for Show SIF values, and the indicators will show on the model where user SIF values have been entered.
Furthermore, review the model input listing report:, Tools> Model Input Listing> select Bend sub report and SIF sub report only.
In the output report see the Bend SIF is followed by a U (i.e. 1.44u), see sub script for U =..., pointing the user to look to the User SIF data listing where the joint shows the correct SIF values entered.
Component Data Listing (Model Input Listing) FAQ
Bentley AutoPIPE