is PWHT the "fabrication heat treatment" ?

[YuJie_PV]

hi all,

i am reading UCS-85 of ASME VIII-1, and confused with the terms " fabrication heat treatment".

i also find the term "post-fabrication heat treatment" in the Companion Guide book of ASME.
it seems not a formal terminology specifically defined in ASME code.
my enquiry:
which does "fabrication heat treatment" refer to?
is PWHT included?
where is the border between "fabrication heat treatment" and "post-fabrication heat treatment"?

thanks in advance?

 

[TGS4]

That paragraph is the only location where the phrase "fabrication heat treatment" is used in the entire book.

I strongly encourage you to submit this as a Request for Interpretation of the Section VIII Committee - https://cstools.asme.org/Interpretation/InterpretationForm.cfm

This needs some (official) clarification.

 

[DekDee]

Hot forming during fabrication at temperatures exceeding 900 F (480 C) will require mechanical testing. ???