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Requirement for PWHT of API 661

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teran

teran

Materials
Joined
Jun 29, 2006
Messages
9
Location
KR
Hi. All,

API Standard661/ISO 13706:2001 say that as below;
9.2 Postweld heat treatment
9.2.1 All carbon steel and low-alloy steel headers shall be subjected to postweld heat treatment. Welded tube-to-tubesheet joints shall be excluded from postweld heat treatment.

Above mean is that any welding is prohibited after PWHT even repair welding for undercut. Is it correct? ( The product also required ASME Set.VIII)

 
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