Is there any documentation for the ASME VIII div1 chapter UHX (design of tubesheets) to show that the software meet the rules as per ASME PTB-4?
Verification is done in the validation document for ASME (see WIKI here for Validation / QA documents)
As of March 2020, AutoPIPE Vessel is covered under ASME PTB-4 2013. The program and supplemental documentation will be updated in a timely manner as new versions of this code are released.
Additional validation information related to ASME PTB-4 2013.PDF document can be found in “ASME PTB-4-2013 ASME Section VIII Division 1 Example Problem Manual”.
AutoPIPE Vessel Certificate and Verification Documents