Piping Fittings of Wrought Carbon Steel and Alloy Steel …
NDE of welds in Grades WPB, WPC, WP1, WP11 Class 1, WP11 Class 2, WP11 Class 3, WP12 Class 1, WP12 Class 2, and WPR may be performed either prior to or after forming. NDE of welds in Grades WP5, WP9, WP91 Types 1 and 2, WP911, WP92, WP22 Class 1, WP22 Class 3, and WP24 shall be done after forming. 6.3.1 All welds in WP91 Types 1 …