In America, they're all based on the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC). It covers all the different types

In America, they're all based on the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC). It covers all the different types of nuclear certifications for organizations, because normal welding certs don't cover the nuclear industry. The "nuclear ticket" for most is probably: > NPT - Fabrication of parts, appurtenances, welded tubular products and piping subassemblies From ToughNickel [2]: > BPVC Section IX outlines the brazing and welding qualification procedures for nuclear pressure vessels. Section IX also gives the welding and brazing qualifications required to work on equipment for use around nuclear reactors. Welders must be qualified per the procedures listed in paragraph NCA-5250. Also, appurtenances up above, not actually a typo. [1] https://www.asme.org/getmedia/eaacef3f-e8b5-44a4-b0c6-451e1ecb4499/nuc-gui-09-nuclear-cert-handbook.pdf https://www.asme.org/getmedia/eaacef3f-e8b5-44a4-b0c6-451e1e... [2] https://toughnickel.com/business/Nuclear-Welding-Certification https://toughnickel.com/business/Nuclear-Welding-Certificati...