This specification covers modified high-strength alloy steel forgings and rolled and forged bar commonly used in oil and gas pressure vessels and oilfield equipment. Oil and gas product specifications for which this material is intended include, but are not limited to, the following: specification for wellhead and Christmas tree equipment and errata, recommended practice for repair and remanufacture of wellhead and Christmas tree equipment, specification for drill-through equipment, specification for marine drilling riser couplings, specification for subsea wellhead and tree equipment and errata, and specification for drilling and production hoisting equipment.
This specification covers requirements for melting, hot working, heat treatment, chemical composition, mechanical properties and testing, rework and retreatment, inspection, certification, product marking, and workmanship, finish, and appearance, as well as metallurgical requirements and nondestructive examination (NDE) requirements.