scope:

This standard provides best practices for engineers, fabricators and installers for purchasing and assembly of pipe and fitting (piping components) that are internally clad with a corrosion-resistant or other metallic cladding.

Piping components may consist of carbon or low alloy steel that has been manufactured by concentric forging of an internal liner made of stainless steel, nickel or nickel alloy or other metal in which the manufacturing process metallurgically bonds the cladding to the external piping component. Piping components may also be manufactured by the application of weld metal overlay by arc welding or other welding process such as explosion welding.