Welding Wps Variables: SMAW
ASME BPVC Section IX and AWS D1.1 welding procedure specification (WPS) essential, supplementary essential, and nonessential variables for 8 processes (SMAW, GMAW, GTAW, FCAW, SAW, ESW, EGW, PAW) with QW variable numbers, requalification requirements, and P-number applicability
| welding process | variable key | P number applicability | QW variable number | description | notes | requalification required | typical range or limits | variable category | variable name | variable type |
|---|---|---|---|---|---|---|---|---|---|---|
| SMAW | essential#QW-403.11 | all | QW-403.11 | Change in the P-Number of base metal used in procedure qualification | New P-No. not covered by prior PQR requires new procedure qualification | yes | P-1 through P-15F; see QW-424 for allowable combinations | base_metal | P-Number change | essential |
| SMAW | essential#QW-403.8 | all | QW-403.8 | Deposited weld metal thickness limits qualified per QW-451 | Qualification on one thickness qualifies a limited range per QW-451 | yes | Qualified range per QW-451 tables; 2T max for base metal thicker than 1.5 in | base_metal | Thickness range | essential |
| SMAW | essential#QW-404.4 | all | QW-404.4 | Change in the F-Number of filler metal (electrode classification grouping) | Change to higher or lower F-No. requires requalification | yes | F-1 through F-6 per QW-432; F-6 (bare wire) not applicable to SMAW | filler_metal | F-Number change | essential |
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