PWHT applied to used equipment not previously PWHT
PWHT applied to used equipment not previously PWHT
(OP)
Good mornign all, question...we are trying to change the service of existing equipment to a high H2s service which wil require us to PWHT the SA516-70 material. the original data sheet and service did not require PWHT. what should i be preprared for? I understand we will have to be NBIC compliant,





RE: PWHT applied to used equipment not previously PWHT
RE: PWHT applied to used equipment not previously PWHT
1) Is it cost-effective to PWHT the entire vessel, or local PWHT every weld? Would it be cheaper to just purchase a new, PWHT'd vessel?
2) If cost-effective, and the Mfr is no longer in business, then write a Non-Conformance Report on your vessel. The disposition will have to be signed by Owner, Vessel Engineer, Quality, and AI. This will be your forum to decide if PWHT after-the-fact is the proper decision. "Alter using PWHT" should be an acceptable decision, assuming that 'normal' weld materials were used.
RE: PWHT applied to used equipment not previously PWHT