This International Standard establishes a set of qualification requirements to verify that the Manufacturer of special materials for the petroleum, petrochemical and natural gas industries has sufficient competence and experience of the relevant material grades of metal, and the necessary facilities and equipment, to manufacture these materials in the required shapes and sizes with acceptable properties according to the applicable standard, material specification and/or material data sheet specified by the Purchaser. This International Standard is applicable to the qualification of Manufacturers of various materials, product forms and manufacturing processes when specified by the Purchaser. This International Standard has been established considering especially, but not exclusively: a) duplex stainless steel; b) high alloyed austenitic stainless steel; c) nickel-based alloys; d) titanium and its alloys. This International Standard also is applicable to the special processes of induction bending, cold bending of tubes and strain-hardened products.