Attached is a copy of 2013 ScIX QW-202.1. The following is my interpretation of the requirements. Three conditions are set up in the case of a specimen failure: 1) (2 nd paragraph) Failure was caused by something unrelated to the welding conditions. This could be a failure of the grips, a nick in the specimen, an error in machining, power failure during the test, etc. In this case one for one replacement of the specimen from the original PQR coupon or a new test coupon welded with the same parameters/conditions may be made and the additional specimen tested. 2) (4 th paragraph) If the failure was caused by a problem that requires a change in essential or supplementary essential variables to correct the problem, then a new PQR test plate must be welded and all tests repeated. Personally, I don’t see how the original PQR test(s) would be valid if the essential (or supplementary essential) var...
Materials selection, welding, forming, Heat treatment, corrossion, NDT