teran
Materials
- Jun 29, 2006
- 9
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)
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)