Thickness range for performance qualification (welder qualification test): ASME BPVC section IX has provided guidelines for the thickness range up to which a welder can weld. This can be found in Table – QW 452.1(b) of ASME BPVC Section IX (2017 edition). A simplified version of that table is given below; According to this table three important points can be drawn: The maximum thickness which a welder can weld is….
Welder Performance qualification (WPQ) is also known as welder qualification test (WQT) or Performance qualification test. Welder qualification test is a very basic and most important step before assigning the job to a welder. The welder qualification test (WQT) is done to determine whether the welder or the welding operator can produce a sound weld or not. Each welder or welding operator shall be qualified for each welding process to….