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A WPS is qualified on 16" diameter pipe. what is the minimum and maximum diameter qualification range?
Wich welding process? Thickness?
See ASME IX QW 288.1, but first: Welding Process
WP
root & hot pass: GTAW (8mm)
fill passes: SMAW (17mm + reinforcement)
ASME IX
SMAW QW 253............QW404.6 & QW 404.7
GTAW QW 256...........QW 404.30