ASME Sec VIII Div 1 to API 620
ASME Sec VIII Div 1 to API 620
(OP)
If an ASME vessel is going to be re-rated as an API 620 tank, can the ASME calculations be used to verify the thickness and stability of the tank? Or does a new set of API 620 calculations for the tank need to be performed? Any opions and why.
Just for information a client has two ASME vessels that were fabricated for a project and it was shut down, now they need tanks for a new project and want to utilize these vessels instead of having new tanks fabricated.
Just for information a client has two ASME vessels that were fabricated for a project and it was shut down, now they need tanks for a new project and want to utilize these vessels instead of having new tanks fabricated.





RE: ASME Sec VIII Div 1 to API 620
There is nowhere in the ASME codes that I have dealt with that says you can't operate an ASME vessel at a lower operating pressure than it was designed for.
Of course if the tank design pressure exceeds the vessels MAWP, then you would obviously need to perform a new set of calculations.
That's my opinion anyway.
Cheers,
John
RE: ASME Sec VIII Div 1 to API 620
RE: ASME Sec VIII Div 1 to API 620
ASME clearly states that tanks with pressure less than 15 psi are exempt, but may still be stamped with the ASME symbol if built in conformance to the code.
RE: ASME Sec VIII Div 1 to API 620