ASTM A234 covers forged or wrought carbon and alloy steel fittings. The term "Wrought" implies that the steel has been shaped by mechanical force (forging, bending, extruding, etc.) rather than casting.
The standard dictates that fittings shall be made by forging, extrusion, or forming. The process must ensure the steel is fully killed (deoxidized).
45-degree and 90-degree (Long Radius and Short Radius). Tees: Equal tees and reducing tees. Reducers: Concentric and eccentric. Caps: Used to seal the end of a pipe. Crosses: For four-way intersections. Heat Treatment Requirements astm a234 wpb pdf
ASTM A234 WPB fittings can be made through various forming operations. The raw material must consist of killed steel, such as forgings, bars, plates, or seamless/fusion-welded pipe. Hammering or pressing into shape. Piercing: Creating a hole in a solid billet. Upsetting: Thickening the walls of the fitting. Rolling/Extruding: Shaping the steel through dies. Machining: Final finishing to meet dimensional standards.
ASTM A234 Grade WPB: A Standard for Industrial Piping Integrity ASTM A234 covers forged or wrought carbon and
To comply with the ASTM A234 WPB standard, manufacturers must perform several tests to ensure safety under pressure:
The overarching standard for wrought carbon and alloy steel pipe fittings. The process must ensure the steel is fully
A genuine ASTM A234 WPB fitting must be marked with specific data. This is what inspectors look for upon receipt.
Heating to a specific temperature and cooling in air. Tempering: Reheating to improve ductility.
Checking for surface imperfections or cracks.