ASME B16.5 Flange ceiling pressure
ASME B16.5 Flange ceiling pressure
(OP)
I inherited a system that has class 300 lb. CRES316L pipe flanges. The issue is the steam system design pressure is 420 psi, 470F. I have tried the annex D calc in B16.5 but come up short 401 psi. The calc uses a ceiling pressure also. Can anyone tell me the purpose of the ceiling pressure and is there a way to justify leaving them in place ?




