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See Chinese contents: NB/T 47014-2011 NB/T 47014-2011: Welding procedure qualification for pressure equipment [including Corrigendum]
This Standard specifies the welding procedure qualification of butt-jointed weld and filled weld of pressure equipment (Vessel, pressure vessel and pressure pipeline), welding procedure qualification of corrosion resisting build-up welding, composition metal materials, heat exchange tube and tube plate as well as rules, test methods and qualified requirements for screw-bolt arc welding procedure.
