BUTTWELD FITTINGS

Size

Standard

ANSI B16. 25: Butt-welding Ends

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

ANSI B16. 9: Butt-welding long radius elbows and returns

MSS SP-25: Marking of each fitting

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

Material

Carbon Steel: 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: with materials specifications to A-335, Grades P1, carbon-molybdenum, and Grades 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.

ASTM specification A-420 covering Low-temperature service, down to-150°F (-101℃)

stainless steel: 304, 304L, 316, 316L and 347. They are furnished in accordance with ASTM Standard A-403, with material specifications to ASTM A-312 covering fittings made from pipe, and A-240 for fitting made from plate.