I posted this question in the piping forum but unfortunately received conflicting responses. Given that API-579-1 Fitness for Service applies to pressure vessels, I am posting this question in the pressure vessel forum as well.
I am preparing an API 579-1 (Fitness for Service) Part 3...
Is there any mention of valve governing thickness in API-579-1 or UCS-66 (BPVC)? I cannot find any mention of valve governing thickness in these references.
I am new to eng-tips and did not realize double posting was against the rules. My question applied to both forums (Piping and BPVC) so I posted it in both forums. Thanks for letting me know.
I am preparing an API 579-1 (Fitness for Service) Part 3 (Assessment of Existing Equipment for Brittle Fracture) Level 2 analysis of an existing carbon steel piping system to determine if the piping system can operate safely during an auto refrigeration condition.
The procedure does not address...
Thank you @akpipelineenr. Great response.
Somewhat related to my original post, do you know why A106 Grade B piping was not moved to Curve A of UCS-66? I read that carbon steel piping was also experiencing brittle fracture phenomena in addition to A105 flanges.
The 2019 BPVC VIII Div 1 changed the classification of as-forged A105 flanges from Curve B UCS-66 to Curve A UCS-66 to address brittle fracture possibility.
ASME B16.5 still rates an A105 flange to -20F.
Why has B16.5 not followed BPVC UCS-66?
