Haihao Group

carbon steel pipe cap

Buttweld fitting:Butt Weld CAP

Basically a cap will be applied, to shut down the end of a pipe. The Cap, as it is shown in the image below, is available for all pipe dimensions, and is sometimes also used for other purposes.End Caps are used for blocking off or sealing the end of a pipeline. The end cap is welded on at its weld prep to the relevant sized pipe within the pipeline that requires blocking off/sealing. Once in place, unlike a blind flange that can be unbolted to allow access to the pipeline, the end cap is firmly fixed.

Butt Weld Cap Material :

Stainless Steel: ASTM A403 F304/304L/316/316L/317/317L/321 etc.
Carbon Steel: ASTM A105, A350 LF2/LF3 etc.
Alloy Steel: ASTM A182 F1/F5/F9/F11/F12/F22/F91 etc

Butt Weld Cap Standards:

ASME/ANSI B16.9 – Factory-Made Wrought Steel Buttwelding Fittings

MSS SP-75 Specification for High-Test, Wrought, Butt-Welding Fittings

BS 1640-1:Specification for steel butt-welding pipe fittings for the petroleum industry. Wrought carbon and ferritic alloy steel fittings

BS EN 10253 : Butt-welding pipe fittings. Non alloy and ferritic alloy steels with specific inspection requirements

DIN 2617 Steel butt-welding pipe fittings: caps

JIS B2311:Steel butt-welding pipe fittings for ordinary use

JIS B2312:Steel butt-welding pipe fittings

Butt Weld CapTypes:

L/R and S/R 45, 90 degree 180 degree Elbow, Straight and Reducing Tee,
Cross, Concentric and Eccentric Reducer, Cap and Lap Joint Stub End.

Butt Weld Cap Dimensions:

ASME B16.9 Butt Weld Cap Dimension

MSS SP-75 Butt Weld Cap Dimensions