Asme Certified Welders

| Feature | Description | |---------|-------------| | | ASME BPVC Section IX | | Qualification method | Practical weld test + destructive testing | | Key document | Welder Performance Qualification (WPQ) | | Validity | Indefinite, with 6-month continuity requirement | | Material coverage | By P-Numbers (grouped alloys) | | Thickness range | From 1/2 test coupon thickness up to 2x | | Positions | Flat, horizontal, vertical, overhead (separate qual) | | Weld types | Groove qualifies for groove + fillet; Fillet only qualifies for fillet | | Renewal | Re-test after >6 months inactivity | | Transferability | Not automatic between employers; new employer may accept WPQ | | Authority | Employer's QC + Authorized Inspector |

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