ASME B16.9 Buttweld Pipe End Cap

Name: ASME B16.9 Buttweld Pipe End Cap
Brand: SKYLAND

Skyland Buttweld End Caps (Pipe Caps) are deep-drawn or hot-pressed domed closures manufactured to ASME B16.9 and DIN 2617. Engineered with a semi-ellipsoidal 2:1 head profile and a straight cylindrical skirt, they provide maximum pressure containment for dead-ending pipelines, distribution manifolds, and pressure vessel nozzles.

Standard compliance: ASME / ANSI B16.9, DIN 2617, EN 10253, and MSS SP-75

2:1 semi-ellipsoidal deep-drawn dished head profile for optimal stress distribution

Sizes: 1/2" to 48" NB (DN 15 to DN 1200) in seamless and welded plate construction

Wall schedules: Sch 5S, 10S, 40S, STD, 80S, XS, 100, 120, 140, 160, XXS

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StandardASME / ANSI B16.9, DIN 2617, EN 10253, MSS SP-75

Size Range1/2" to 48" (DN 15 to DN 1200)

SchedulesSch 10S to Sch XXS

Head Profile2:1 Semi-Ellipsoidal / Torispherical with cylindrical flange

MaterialsASTM A234 WPB, A420 WPL6, A403 WP304L/316L, Duplex

CertificationsISO 9001:2015, PED 2014/68/EU, EN 10204 3.1

Technical Selection

ASME B16.9 Pipe End Cap Specifications

Select nominal size, wall thickness, and alloy grade for buttweld pipe caps.

StandardASME B16.9 / DIN 2617

Sizes1/2" to 48"

SchedulesSch 10 to XXS

Closure2:1 Ellipsoidal Head

Size Selection

1/2" - 2"1/2" to 2" NPS (DN 15 - DN 50)

3" - 8"3" to 8" NPS (DN 80 - DN 200)

10" - 24"10" to 24" NPS (DN 250 - DN 600)

26" - 48"26" to 48" NPS (DN 650 - DN 1200)

Part Number Example

SKL-CAP-040-SCH40-WPB

SKLBrandSkyland Metal & Alloys

CAPTypeButtweld Pipe End Cap

040Size4" NPS (DN 100)

SCH40ScheduleSchedule 40

WPBMaterialASTM A234 WPB

Technical specifications

Design StandardASME B16.9 / DIN 2617

Weld PreparationASME B16.25 37.5° Bevel

Operational Notes

Deep-drawn ellipsoidal design delivers superior burst pressure strength.

Precision machined cylindrical skirt ensures flawless root pass fit-up.

Product Overview

Buttweld pipe caps provide a permanent, leak-proof welded closure for the ends of piping manifolds, test loops, and vessel nozzles.

The ellipsoidal shape handles high internal pressure with lower wall thickness compared to flat closures, reducing weight and material costs.