| Variable Type | Effect on WPS | Effect on Welder | |---------------|----------------|------------------| | | Changes require new PQR | Changes may require new WPQ | | Non-essential | Can change without new PQR | Not applicable | | Supplementary Essential (for impact testing) | Requires requalification | N/A |
1. What is ASME Section IX? ASME Section IX is the part of the ASME BPVC that contains the rules for qualifying welders, welding operators, brazers, and welding procedures . It is not a design code but a supporting standard —other ASME codes (e.g., Section I, VIII, III) rely on Section IX to ensure welds are structurally sound. welding standard asme