UG-14 and flange
UG-14 and flange
(OP)
Hi all,
I do know that bar and rod material may be used for manufacture of shells and heads of pressure vessels using code cases 2155 and 2156. Could anyone perhaps point me to a code case and/or interpretation for use of bar stock for the manufacture of flanges for pressure vessels? It seems UG-14 prohibits this.
Any help would be highly appreciated.
Thanks in advance!
I do know that bar and rod material may be used for manufacture of shells and heads of pressure vessels using code cases 2155 and 2156. Could anyone perhaps point me to a code case and/or interpretation for use of bar stock for the manufacture of flanges for pressure vessels? It seems UG-14 prohibits this.
Any help would be highly appreciated.
Thanks in advance!





RE: UG-14 and flange
RE: UG-14 and flange
Thanks for your response CodeJackle!
RE: UG-14 and flange
Also see the following interpretation which I think does not help your case:
Interpretation: VIII-1-07-17
Subject: Section VIII, Division 1 (1998 Edition, 2000 Addenda); Appendix 2, 2-2(d)(1)
Date Issued: January 8, 2007
found here:
http://c
RE: UG-14 and flange
Interpretation: VIII-1-86-171
Subject: Section VIII, Division 1, Appendix 2, 2-2(d)(1), Use of Bar for Manufacture of Hubbed Flanges
Date Issued: October 26, 1987
Please consult your AI or AIA of record for clarification of Code requirements.
RE: UG-14 and flange
In the meanwhile if you could think of something else, please do keep the suggestions coming in.
I will keep you posted.
Thanks again.
RE: UG-14 and flange
I am not offering an opinion on the use of bar, though.
Regards,
Mike
RE: UG-14 and flange
Any new thoughts in light of this info?
RE: UG-14 and flange
Your flange can be designed as an integral flange similar to Fig 2-4 (5).
UG-14 would appear to disallow bar for this use, however we recently bought some approx 10" round that was certified as both bar and forging, you might look into this.
I don't know if there are any applicable Code Cases or interpretations, sorry.
Regards,
Mike
RE: UG-14 and flange
See unofficial link:
http://cstools.asme.org/csconnect/pdf/R6576.pdf
I also agree with SnTMan's comments regarding integral flanges.
RE: UG-14 and flange
Hope the material i have gathered with your help serves to a allay the concerns of out NB.
RE: UG-14 and flange
RE: UG-14 and flange
SA-479 is a bar specification and the limitations are specified in UG-6(b), UG-14, and Appendix 2.
NOTE: Appendix 2 paragraph 2-2(a) specifies compliance to UG-4 through UG-14.
From prior posts I know you are aware of the Code Cases CC-2155 and CC-2156-1
I believe the same limitations for the use of bar materials exist for the use of plate materials.
See UW-13(f) and Appendix 20 for limitations on the use of plate.
Why, because it is written in the Code that way. I am sure the ASME committee members have their reasons, maybe not the same reasons, but as a committee, they agree on the limitations.