Are B16.5 Group Numbers the Same as Sec IX P-Numbers?
Are B16.5 Group Numbers the Same as Sec IX P-Numbers?
(OP)
Hi guys. Does anybody know if the Group Numbers in B16.5 are equivalent to Section IX P-numbers? I don't have a copy of Section IX. Thanks!





RE: Are B16.5 Group Numbers the Same as Sec IX P-Numbers?
If so, then no, they are not the same.
RE: Are B16.5 Group Numbers the Same as Sec IX P-Numbers?
Thanks for the reply. Yes that's what I'm asking.
If they're not the same, how then does a guy ensure he is matching up equivalent metallurgies when welding or when assembling a piping design specification for a particular fluid service? Do you have to go back to the base ASTM specs and look at all the compositions and calculate the carbon equivalents, etc.?
RE: Are B16.5 Group Numbers the Same as Sec IX P-Numbers?
That is the whole purpose of ASME P-numbers, they are categorized by similar metallurgy and weldability characteristics. You need to get a copy of Section IX and review QW-200.3 and Table QW-422.
From the P-number, you could go further to the ASTM/ASME spec and review the detailed chemical compositions and calculate carbon equivalents from the Material Test Report of the component or pipe material.
RE: Are B16.5 Group Numbers the Same as Sec IX P-Numbers?
RE: Are B16.5 Group Numbers the Same as Sec IX P-Numbers?