SA515-70
SA515-70
(OP)
I have a vessel that was constructed in 1972 with SA515-70 material shells(1.8125" thick). I am adding (4) nozzles to this vessel and am having issues with the MDMT.
The original U1A does not specify the MDMT and only has an empty blank that states "MDMT when less than -20 F." It is my understanding that this older version of the ASME code did not have specifics on impact testing exemptions. I am running the vessel in Compress, and am getting a minimum MDMT of +84 F for the SA515-70 material. This well above the minimum operating tempterature.
My question is, can I evaluate the new nozzle alterations with the current (2013) version of ASME VIII, Div 1? Even though the current version of the code does not impact test exempt SA515-70 material?
The original U1A does not specify the MDMT and only has an empty blank that states "MDMT when less than -20 F." It is my understanding that this older version of the ASME code did not have specifics on impact testing exemptions. I am running the vessel in Compress, and am getting a minimum MDMT of +84 F for the SA515-70 material. This well above the minimum operating tempterature.
My question is, can I evaluate the new nozzle alterations with the current (2013) version of ASME VIII, Div 1? Even though the current version of the code does not impact test exempt SA515-70 material?





RE: SA515-70
The world has evolved and we must use the benefits of the today technology advances, hence it is normal to use the latest design code.
However, you are talking of modifying an old vessel, not designing a new one. Your guide code is not ASME VIII, but API 579. ASME VIII is the code for designing new vessels only!
Come back with relevant questions, once you are familiar with the requirements of API 579.
Cheers,
gr2vessels
RE: SA515-70
Nothing in ASME has been rescinded in the period from the 70's until now. Thus your documentation [U-1] signed by the AI matters, and COMPRESS just gave you a ridiculous answer. Don't believe software when it gives ridiculous answers.
RE: SA515-70
RE: SA515-70