Butt-Weld Pipe Cap, ASME B16.9 and EN 10253

Butt-welding caps and dished ends to close a pipe run. EN 10253-1 in S235 (black or galvanized) and ASME B16.9 in A234 WPB (STD or XS, painted).

ASME B16.9EN 10253-1

Size range: Ø 21.3 to 219.1 mm
Wall thickness: 2 to 6.3 mm, STD, XS
Steel grade: A234WPB, S235
Standard: ASME B16.9, EN 10253-1
Finish: Black, Galvanized, Painted
Catalog references: 72
Marking: Stamped (micro-percussion)
Packaging: Pallets, cartons
Certificate: EN 10204: Mill Test Certificate 3.1 / Report 2.2

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Price on request

Pick the exact size, standard and finish in the reference list.

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Close a line cleanly and for good

A cap is welded to the end of a pipe to close it: the end of a header, a stub for a future extension, a drain or settling pot. Its dished shape carries pressure far better than a flat plate welded on.

Unlike a screwed plug or a blind flange, a cap has no leak path: the closure is permanent and is inspected like every other weld of the line.

Our caps come in A234 WPB to ASME B16.9 (STD or XS, painted) and in S235 to EN 10253-1 (black or galvanized), Ø 21.3 to 219.1 mm.

Technical data

Sizes, grades, wall thicknesses and finishes come straight from our catalog of orderable references.

Steel grades

A234WPBS235

Wall thicknesses

2 to 6.3 mmSTDXS

Coating and finish

BlackGalvanizedPainted

Certificates

EN 10204 3.1 inspection certificate with every shipment. NDT, hardness and hydrostatic test reports on request.

72 references available

Every orderable reference of this product type, with its full designation. Open a reference for its technical page and compatible fittings.

Reference	Designation	Dimensions (mm)	Standard · grade	Type · finish
C121STDP	Butt-weld cap, Ø21.3 mm STD, A234WPB, ASME B16.9, painted	21.3 STD	ASME B16.9A234WPB	Painted
C121XSP	Butt-weld cap, Ø21.3 mm XS, A234WPB, ASME B16.9, painted	21.3 XS	ASME B16.9A234WPB	Painted
C126STDP	Butt-weld cap, Ø26.7 mm STD, A234WPB, ASME B16.9, painted	26.7 STD	ASME B16.9A234WPB	Painted
C126XSP	Butt-weld cap, Ø26.7 mm XS, A234WPB, ASME B16.9, painted	26.7 XS	ASME B16.9A234WPB	Painted
C133STDP	Butt-weld cap, Ø33.4 mm STD, A234WPB, ASME B16.9, painted	33.4 STD	ASME B16.9A234WPB	Painted
C133XSP	Butt-weld cap, Ø33.4 mm XS, A234WPB, ASME B16.9, painted	33.4 XS	ASME B16.9A234WPB	Painted
C142STDP	Butt-weld cap, Ø42.2 mm STD, A234WPB, ASME B16.9, painted	42.2 STD	ASME B16.9A234WPB	Painted
C142XSP	Butt-weld cap, Ø42.2 mm XS, A234WPB, ASME B16.9, painted	42.2 XS	ASME B16.9A234WPB	Painted
C148STDP	Butt-weld cap, Ø48.3 mm STD, A234WPB, ASME B16.9, painted	48.3 STD	ASME B16.9A234WPB	Painted
C148XSP	Butt-weld cap, Ø48.3 mm XS, A234WPB, ASME B16.9, painted	48.3 XS	ASME B16.9A234WPB	Painted
C160STDP	Butt-weld cap, Ø60.3 mm STD, A234WPB, ASME B16.9, painted	60.3 STD	ASME B16.9A234WPB	Painted
C160XSP	Butt-weld cap, Ø60.3 mm XS, A234WPB, ASME B16.9, painted	60.3 XS	ASME B16.9A234WPB	Painted
C173STDP	Butt-weld cap, Ø73 mm STD, A234WPB, ASME B16.9, painted	73 STD	ASME B16.9A234WPB	Painted
C173XSP	Butt-weld cap, Ø73 mm XS, A234WPB, ASME B16.9, painted	73 XS	ASME B16.9A234WPB	Painted
C188STDP	Butt-weld cap, Ø88.9 mm STD, A234WPB, ASME B16.9, painted	88.9 STD	ASME B16.9A234WPB	Painted
C188XSP	Butt-weld cap, Ø88.9 mm XS, A234WPB, ASME B16.9, painted	88.9 XS	ASME B16.9A234WPB	Painted
C1114STDP	Butt-weld cap, Ø114.3 mm STD, A234WPB, ASME B16.9, painted	114.3 STD	ASME B16.9A234WPB	Painted
C1114XSP	Butt-weld cap, Ø114.3 mm XS, A234WPB, ASME B16.9, painted	114.3 XS	ASME B16.9A234WPB	Painted
C1141STDP	Butt-weld cap, Ø141.3 mm STD, A234WPB, ASME B16.9, painted	141.3 STD	ASME B16.9A234WPB	Painted
C1141XSP	Butt-weld cap, Ø141.3 mm XS, A234WPB, ASME B16.9, painted	141.3 XS	ASME B16.9A234WPB	Painted
C1168STDP	Butt-weld cap, Ø168.3 mm STD, A234WPB, ASME B16.9, painted	168.3 STD	ASME B16.9A234WPB	Painted
C1168XSP	Butt-weld cap, Ø168.3 mm XS, A234WPB, ASME B16.9, painted	168.3 XS	ASME B16.9A234WPB	Painted
C1219STDP	Butt-weld cap, Ø219.1 mm STD, A234WPB, ASME B16.9, painted	219.1 STD	ASME B16.9A234WPB	Painted
C1219XSP	Butt-weld cap, Ø219.1 mm XS, A234WPB, ASME B16.9, painted	219.1 XS	ASME B16.9A234WPB	Painted
C121G	Butt-weld cap, Ø21.3 × 2 mm, S235, EN 10253-1, galvanized	21.3×2	EN 10253-1S235	Galvanized
C126G	Butt-weld cap, Ø26.9 × 2.3 mm, S235, EN 10253-1, galvanized	26.9×2.3	EN 10253-1S235	Galvanized
C133G	Butt-weld cap, Ø33.7 × 2.6 mm, S235, EN 10253-1, galvanized	33.7×2.6	EN 10253-1S235	Galvanized
C142G	Butt-weld cap, Ø42.4 × 2.6 mm, S235, EN 10253-1, galvanized	42.4×2.6	EN 10253-1S235	Galvanized
C148G	Butt-weld cap, Ø48.3 × 2.6 mm, S235, EN 10253-1, galvanized	48.3×2.6	EN 10253-1S235	Galvanized
C160G	Butt-weld cap, Ø60.3 × 2.9 mm, S235, EN 10253-1, galvanized	60.3×2.9	EN 10253-1S235	Galvanized
C176G	Butt-weld cap, Ø76.1 × 2.9 mm, S235, EN 10253-1, galvanized	76.1×2.9	EN 10253-1S235	Galvanized
C188G	Butt-weld cap, Ø88.9 × 3.2 mm, S235, EN 10253-1, galvanized	88.9×3.2	EN 10253-1S235	Galvanized
C1114G	Butt-weld cap, Ø114.3 × 3.6 mm, S235, EN 10253-1, galvanized	114.3×3.6	EN 10253-1S235	Galvanized
C1139G	Butt-weld cap, Ø139.7 × 4 mm, S235, EN 10253-1, galvanized	139.7×4	EN 10253-1S235	Galvanized
C1168G	Butt-weld cap, Ø168.3 × 4.5 mm, S235, EN 10253-1, galvanized	168.3×4.5	EN 10253-1S235	Galvanized
C1219G	Butt-weld cap, Ø219.1 × 6.3 mm, S235, EN 10253-1, galvanized	219.1×6.3	EN 10253-1S235	Galvanized
C121N	Butt-weld cap, Ø21.3 × 2 mm, S235, EN 10253-1, black	21.3×2	EN 10253-1S235	Black
C126N	Butt-weld cap, Ø26.9 × 2.3 mm, S235, EN 10253-1, black	26.9×2.3	EN 10253-1S235	Black
C133N	Butt-weld cap, Ø33.7 × 2.6 mm, S235, EN 10253-1, black	33.7×2.6	EN 10253-1S235	Black
C142N	Butt-weld cap, Ø42.4 × 2.6 mm, S235, EN 10253-1, black	42.4×2.6	EN 10253-1S235	Black
C148N	Butt-weld cap, Ø48.3 × 2.6 mm, S235, EN 10253-1, black	48.3×2.6	EN 10253-1S235	Black
C160N	Butt-weld cap, Ø60.3 × 2.9 mm, S235, EN 10253-1, black	60.3×2.9	EN 10253-1S235	Black
C176N	Butt-weld cap, Ø76.1 × 2.9 mm, S235, EN 10253-1, black	76.1×2.9	EN 10253-1S235	Black
C188N	Butt-weld cap, Ø88.9 × 3.2 mm, S235, EN 10253-1, black	88.9×3.2	EN 10253-1S235	Black
C1114N	Butt-weld cap, Ø114.3 × 3.6 mm, S235, EN 10253-1, black	114.3×3.6	EN 10253-1S235	Black
C1139N	Butt-weld cap, Ø139.7 × 4 mm, S235, EN 10253-1, black	139.7×4	EN 10253-1S235	Black
C1168N	Butt-weld cap, Ø168.3 × 4.5 mm, S235, EN 10253-1, black	168.3×4.5	EN 10253-1S235	Black
C1219N	Butt-weld cap, Ø219.1 × 6.3 mm, S235, EN 10253-1, black	219.1×6.3	EN 10253-1S235	Black
DE21G	Butt-weld dished end, Ø21.3 × 2 mm, S235, EN 10253-1, galvanized	21.3×2	EN 10253-1S235	Galvanized
DE26G	Butt-weld dished end, Ø26.9 × 2.3 mm, S235, EN 10253-1, galvanized	26.9×2.3	EN 10253-1S235	Galvanized
DE33G	Butt-weld dished end, Ø33.7 × 2.6 mm, S235, EN 10253-1, galvanized	33.7×2.6	EN 10253-1S235	Galvanized
DE42G	Butt-weld dished end, Ø42.4 × 2.6 mm, S235, EN 10253-1, galvanized	42.4×2.6	EN 10253-1S235	Galvanized
DE48G	Butt-weld dished end, Ø48.3 × 2.6 mm, S235, EN 10253-1, galvanized	48.3×2.6	EN 10253-1S235	Galvanized
DE60G	Butt-weld dished end, Ø60.3 × 2.9 mm, S235, EN 10253-1, galvanized	60.3×2.9	EN 10253-1S235	Galvanized
DE76G	Butt-weld dished end, Ø76.1 × 2.9 mm, S235, EN 10253-1, galvanized	76.1×2.9	EN 10253-1S235	Galvanized
DE88G	Butt-weld dished end, Ø88.9 × 3.2 mm, S235, EN 10253-1, galvanized	88.9×3.2	EN 10253-1S235	Galvanized
DE114G	Butt-weld dished end, Ø114.3 × 3.6 mm, S235, EN 10253-1, galvanized	114.3×3.6	EN 10253-1S235	Galvanized
DE139G	Butt-weld dished end, Ø139.7 × 4 mm, S235, EN 10253-1, galvanized	139.7×4	EN 10253-1S235	Galvanized
DE168G	Butt-weld dished end, Ø168.3 × 4.5 mm, S235, EN 10253-1, galvanized	168.3×4.5	EN 10253-1S235	Galvanized
DE219G	Butt-weld dished end, Ø219.1 × 6.3 mm, S235, EN 10253-1, galvanized	219.1×6.3	EN 10253-1S235	Galvanized
DE21N	Butt-weld dished end, Ø21.3 × 2 mm, S235, EN 10253-1, black	21.3×2	EN 10253-1S235	Black
DE26N	Butt-weld dished end, Ø26.9 × 2.3 mm, S235, EN 10253-1, black	26.9×2.3	EN 10253-1S235	Black
DE33N	Butt-weld dished end, Ø33.7 × 2.6 mm, S235, EN 10253-1, black	33.7×2.6	EN 10253-1S235	Black
DE42N	Butt-weld dished end, Ø42.4 × 2.6 mm, S235, EN 10253-1, black	42.4×2.6	EN 10253-1S235	Black
DE48N	Butt-weld dished end, Ø48.3 × 2.6 mm, S235, EN 10253-1, black	48.3×2.6	EN 10253-1S235	Black
DE60N	Butt-weld dished end, Ø60.3 × 2.9 mm, S235, EN 10253-1, black	60.3×2.9	EN 10253-1S235	Black
DE76N	Butt-weld dished end, Ø76.1 × 2.9 mm, S235, EN 10253-1, black	76.1×2.9	EN 10253-1S235	Black
DE88N	Butt-weld dished end, Ø88.9 × 3.2 mm, S235, EN 10253-1, black	88.9×3.2	EN 10253-1S235	Black
DE114N	Butt-weld dished end, Ø114.3 × 3.6 mm, S235, EN 10253-1, black	114.3×3.6	EN 10253-1S235	Black
DE139N	Butt-weld dished end, Ø139.7 × 4 mm, S235, EN 10253-1, black	139.7×4	EN 10253-1S235	Black
DE168N	Butt-weld dished end, Ø168.3 × 4.5 mm, S235, EN 10253-1, black	168.3×4.5	EN 10253-1S235	Black
DE219N	Butt-weld dished end, Ø219.1 × 6.3 mm, S235, EN 10253-1, black	219.1×6.3	EN 10253-1S235	Black

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Waste Disposal

Manufacturing standards

Made to the following dimensional and material standards. Inspection certificate to EN 10204.

Standard

ASME B16.9

Factory-made wrought butt-welding fittings. North-American reference for dimensions and tolerances.

Standard

EN 10253-1

European standard for butt-welding pipe fittings, Part 1, carbon steel without specific inspection requirements.

Frequently asked questions

Cap or dished end: what is the difference?

They are two names for the same part: a dished end that closes the pipe. “Cap” is the ASME B16.9 term.

Cap or blind flange?

A blind flange can be removed, a cap cannot. If the line has to be opened or extended regularly, use a flange; for a permanent closure, a cap is simpler and has no gasket.

How do I choose the wall thickness?

As for the other fittings: the same as the pipe. Give the pipe specification in your quote request if in doubt.

Other butt-weld fittings

Elbows

Pipe Cap