@r6155, please tell me how the operating strength of a stud is affected by torqueing it vs tensioning.
The material still has the same properties regardless of tightening method. I don't disagree with the low accuracy comment but I would not agree that is really an issue for MOST applications.
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There is no downgrade in minimum strength and you gain resistance to sulphide stress cracking.
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there is a 20% reduction in strength per ASME code between B7 to B7M
Yes it's a thing here. Some operators want B7M where the plant is sour, even though WE all know the environment isn't sour enough to cause issues. It's not an issue on their ANSI piping flanges so they seem to figure they can blanket everything with B7M studs, not realizing TEMA flanges are all...
Thank you Christine,
Hadn't thought of the option to fab box type pass arrangement. It's 4 pass so a little more complex...
Makes sense that TEMA was sometimes ignored for pass consideration of bolting and then UHX went and messed everything up, LOL
Yes my standard practice would be to make...
thread794-360799
I was looking for an answer regarding exactly this topic, but specifically for when the requirement to consider pass grooves came into Appendix 2. I do know that in designs from 1980-ish it is obvious when running the flanges to today's code that the gasket ribs were NOT...
