§ 178.270-7 - Joints in tank shells.

Joints in tank shells must be made by fusion welding. Such joints and their efficiencies must be as required by Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter). Weld procedures and welder performance must be ASME Code qualified or must be qualified by the approval agency in accordance with the procedures in the ASME Code, Section IX, Welding and Brazing Qualifications. A record of each qualification must be retained by the manufacturer for the period prescribed in Section VIII of the ASME Code, and must be made available to any duly identified representative of the Department and the owner of the tank.