hi

As for qualifying ANSI B16.5 flanged joints, there are three codes applicable:ASME Section III Division 1 NC-3658.3,Section VIII Div.2 Appendix3 and Section VIII Div.1 Appendix2, among which NC3658.3 is already incorporated into CII. Is there anyone tell me the difference between them including criteria rules and application?

Any instruction is highly appreciated. Thanks.

Best Regards.

Read:

http://www.pipestress.com/papers/Eval-FlageConn.pdf

Regards,

Dear Dan

Thanks for your reply, I read the paper carefully,but I do not think it gives comlete answer to my query, because NC3658.3 is not investigated, which is differnt from NC3658.1 ,i.e. frequent pressure method.

Compared with fre. pre. method and NC3658.3,incorporated into CII, stress calculation method specified by ASME Sec.VIII Div. 2 Appendix 3 is more rigorous and less conservative? If so,can I try the latter if fail to qualify flange jonit by CII?

Rds

It is your decision what method is appropiate to use. Caesar is the tool, you are the master.

I would go to ASME Section VIII Division 1 Appendix 2

Thanks.
Maybe programmer of CII think it a boring job to incorporate stress calculation into the tools, too many formula.