This standard American Welding Society (AWS). 1993. 24p. Supplement
F of AWS QC7-93, Standard for AWS Certified Welders, was developed
using as references ANSI/ASME B31.3, Chemical Plant and Petroleum
Refinery Piping and ASME Boiler and Pressure Vessel Code, Section
IX, Welding and Brazing Qualifications. American Welding Society
makes no assessment of WPS or PQR compliance with either of these
standards nor of their usability in production welding.