Welding Wps Variables: SAW
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SAW | essential#QW-403.11 | all | QW-403.11 | Change in P-Number of base metal | Same rule applies; SAW typically used on P-1 (carbon steel) and P-3 through P-5 | yes | P-1 through P-15F; see QW-424 | base_metal | P-Number change | essential |
| SAW | essential#QW-404.24 | all | QW-404.24 | Change in flux trade name or manufacturer of flux used in PQR | Flux and wire are a system; must match flux type (neutral vs active; fused vs agglomerated) | yes | Different flux manufacturers produce different weld chemistries; even nominally similar fluxes may differ | filler_metal | Flux change | essential |
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