Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
(OP)
I am looking at SA-193 and A-193 Grade B8 Class 2 (304 stainless steel) allowable stress values in B31.3 and B&PV Section II.
The diameter I am looking at is < 3/4".
Does anyone know why the allowable stress values are different in B31.3 vs. B&PV Section II? The codes appear to use the same rules for determining allowable stresses from reading the passages in the corresponding codes for how the stresses are calculated.
The diameter I am looking at is < 3/4".
Does anyone know why the allowable stress values are different in B31.3 vs. B&PV Section II? The codes appear to use the same rules for determining allowable stresses from reading the passages in the corresponding codes for how the stresses are calculated.





RE: Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
RE: Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
This is hearsay. I've never experimented nor researched this myself.
RE: Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
RE: Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
What is curious is if the vessel Metengr mentions operates below -20F, Section VIII allows you to use A193 B7 to hold the vessel together while B31.1 makes you use A320 L(7, 47, and several other choices) to attach piping to it. Go figure.
I wish the committes would call a joint session and get on the same page.
rmw
RE: Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
It would be like herding cats.
RE: Why are bolting allowable stresses different in B31.3 vs. B&PV Sec II
rmw