About ASTM A234 WPB pipe fittings

ASTM A234 is Standard Specification for steel pipe fittings includes carbon and alloy steel material for moderate and high temperature services. It covers steel fittings of seamless and welded types. Steel Pipe fittings are applied in pressure pipelines and in pressure vessel fabrications. These fittings material consist of killed steel, forgings, bars, plates, seamless or HFW (fusion welded) pipe products, with filler metal added.

What is WPB?

W = WELDABLE / wrought

P = RELATED TO P NUMBER OF ALLOY MATERIAL

B = REFER TO MINIMUM YIELD OF MATERIAL

They are available in latest revision of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. Also widely used in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures. The grades are ASTM A234 WPB, WPC, WP5, WP9, WP91, WP11, WP12 and WP22.

Specifications of pipe fittings:

Standards: ANSI /ASME B16.9, B16.28, MSS-SP-43.

Outer Diameter Range: 1/2” to 48”

Thickness Range: SCH 10, sch 20, SCH 40, SCH STD, SCH 80, SCH XS, SCH 160, SCH XXS etc.

Steel pipe fittings manufacturing types in forged, threaded, butt weld, and seamless.