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Code Relief Valve Forms

Started by Guest_HelpNASA_*, Sep 08 2006 02:46 PM

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#1 Guest_HelpNASA_*

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Posted 08 September 2006 - 02:46 PM

I just discovered today that there exists a UV-1 form for ASME Code relief valves. I have been working with relief valves for about 20 years, and this is the first I have heard of the form's existence. I have never received one when I purchased a Code relief valve. How long have these forms been around? I did not find any references in Sec.VIII Div.1 2001 edition, but it appeared in the 2004 edition.... I'm puzzled?

Also, ASME Sec.VIII Div.1 calls for a UV-1 form, while Sec.VIII Div.2 calls for an A-4 form; both forms appear identical except for the Div. number. Is there a difference between Div.1 and Div.2 relief valves?

#2 pleckner

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Posted 12 September 2006 - 12:55 PM

It's good that you point this out because I never really concerned myself about the forms either. I guess I'll make sure that they are provided with any valves I specify in the future.

Division 2 is more restrictive in the choice of materials used in construction and there are no pressure limitations in applying this part of the code. There are other construction differences as well. But, I don't see where there are any differences between Divison 1 and 2 in the type of relief valves one would specify.
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