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
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.