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PWHT IN ACCORDING TO API661

PWHT IN ACCORDING TO API661

PWHT IN ACCORDING TO API661

(OP)
Hello,
We completed welding fabrication of pressure retain parts for air cooler and also finished PWHT. However, we are find some rejectable defects in the pressure retaining parts after PWHT.
Therefore, we would like to repair and complete without PWHT in accordace with ASME Sect.VIII Div.1 UCS-56(f)because we can meet the the requirement of UCS-56.

API661 for the air cooled heat excahanger which is described like " All caron steel and low-alloy steel headers shall be subjected to PWHT."

Question) Do we have to perform PWHT after repair welding?
 The header was designed in according to ASME Set.VIII.

RE: PWHT IN ACCORDING TO API661

Cross posted in the ASME Code Issues forum as thread292-159928

jt

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