ASTM B462 and ASME SB462 are the standard specifications for Forged or Rolled UNS N08367, UNS N08925, UNS N08031, UNS N08034, UNS N08932, UNS N08926, UNS N08354, UNS N08830, UNS N08535, UNS N08904, UNS N08927, and UNS R20033 Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High-Temperature Service.
These specifications cover the standard requirements for the design, manufacturing, testing, and documentation of forged or rolled alloy pipe flanges, forged fittings, valves, and parts used in corrosive high-temperature service applications.
The materials covered under these specifications are categorized as high-performance alloys, which are specifically designed to resist corrosion, oxidation, and high temperatures. These materials are commonly used in chemical processing, petrochemical, and other industrial applications where severe environments are encountered.
The specifications cover various types of flanges, fittings, valves, and parts, including weld neck, slip-on, socket weld, threaded, blind, and lap joint flanges, as well as elbows, tees, reducers, caps, and other forged fittings. The specifications also outline the requirements for marking, certification, and packaging of the products.
The dimensions of the flanges are specified in accordance with ASME B16.5, which provides the standard dimensions, tolerances, and marking requirements for pipe flanges and flanged fittings. The specifications cover flanges ranging in size from NPS 1/2 through NPS 24, with pressure classes from 150 through 2500.
The dimensions of the forged fittings are specified in accordance with ASME B16.11, which provides the standard dimensions, tolerances, and marking requirements for forged steel fittings. The specifications cover fittings ranging in size from 1/8 inch through 4 inches, with pressure classes ranging from 2000 through 9000.
The dimensions of the valves and parts are specified in accordance with the manufacturer’s design, but they must meet the requirements of the specification regarding material, performance, and testing. The dimensions and tolerances of these products may vary depending on their design, size, and pressure rating.