B16.11

Forged Steel Fittings, Socket Welding and Threaded

A216/A216M-26

Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service

A217/A217M-25

Standard Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service

A960/A960M-25a

Standard Specification for Common Requirements for Wrought Steel Piping Fittings (Includes all amendments and changes 9/24/2025).

Steel Butt-Welding Fittings