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Specification       ASTM A234 ASME B16.9

Product                 Elbow, Tee, Reducer, Caps

Tensile         60-85 ksi


Yield      35ksi (240Mpa)

Grade                    WPB

ASTM Standards

Our carbon steel welding fittings are manufactured from seamless steel tubing and furnished in accordance with ASTM Standard A-234, with material specifications in accordance with ASTM A-106, Grade B, for fittings made from pipe, ASTM A-515, Grade 65 or 70, for fittings made from plate. Alloy steel welding fittings are furnished in accordance with ASTM standard A-234, with materials specification including A-335, Grade P1, carbon-molybdenum, and Grade P12, P11, P22, P5, P7, P9 chrome molybdenum, for fittings made from pipe. ASTM A-204 Grade B, carbon molybdenum, and ASTM A-387 Grades 12, 11, 22, 5, 7, 9 chrome molybdenum for fittings made from plate. Welding fittings are also available in accordance with ASTM specification A-420 covering low-temperature service, down to -150°F (-101°C).

ASME/ANSI and MSS Standards

ASME/ANSI and MSS standards govern fitting dimensions and tolerances, ASME/ANSI B16.9 “Wrought Steel Buttweld Fittings”, is the basic standard. It covers steel butt welding fittings sizes NPS 1/2" through NPS 48" (DN 15 through DN 1200). Other ASME/ANSI and MSS standards, written to supplement B16.9, are as follows ;

ASME/ANSI B16.25: Butt welding Ends

ASME/ANSI B16.28: Butt welding short radius elbows and returns

MSS SP-43: Light-wall stainless steel fittings, NPS 3/4" through NPS 24" (DN 20 through DN 600)

MSS SP-75: High Test Wrought Welding Fittings

The following codes and standards influence the manufacture of welding fittings, where applicable.

ASME/ANSI B31.1: Power piping ASME/ANSI B31.3: Petroleum refinery piping

ASME/ANSI B31.4: Liquid petroleum transportation piping system

ASME/ANSI B31.5: Refrigeration piping

ASME/ANSI B31.8: Gas transmission and distribution piping systems

ANSI/ASME B36.10M: Welded and seamless wrought steel pipe

ANSI/ASME B36.19M: Stainless steel pipe

CSA Z183: Oil pipe line transportation systems

CSA Z184: Gas pipe line systems

CAN3-Z245.11-M91: Requirements for wrought steel butt welding fittings

ASME: Boiler and pressure vessel code

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