Dear you all,
Our Sub-contractor just have submitted one Standard Welding Procedure Specifications (SWPS) to us for reviewing, the SWPS is intended to use for fabrication of ASME B31.3 Piping System.
When I reviewed it, I read ASME IX Article V, Para. QW-540 (a) mentioned that "The manufacturer or contractor may not deviate from the welding conditions specified on the SWPS", therefore I think that the Sub-contractor is not permitted to change any welding conditions as root gap, root face, amperage, voltage, travel speed, position, etc....
My opinion is right or wrong, could any body have experience about SWPS please guide me about above mentioned.
Thank and best regards,
N.T.C