This specification covers the requirements for Gas Tungsten Arc Welding and Plasma Arc Welding of stainless steels and nickel alloy tube and pipe 1/4 in [6 mm] diameter and larger in the fabrication and construction of new sanitary (hygienic) processing systems. This specification includes the welding of tube and pipe for the transportation of sanitary (hygienic) system products and cleaning or sanitizing solutions. It includes manual welding as well as automatic or mechanized welding, such as orbital welding. This specification addresses welding qualification and visual examination requirements for as-welded surfaces as well as finished surfaces.
