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)
Product page
SKYLAND
ASME B16.9 Buttweld Oval / Ellipsoidal Vessel Caps
Skyland Buttweld Oval / Ellipsoidal Caps are engineered for pressure vessel heads, boiler drums, accumulator tanks, and header manifolds. Conforming to ASME B16.9, DIN 28011, and DIN 28013, their low-profile curved geometry provides superior stress dissipation under pulsating hydraulic and pneumatic pressures with reduced overall height compared to standard spherical caps.
Manufactured to ASME B16.9, DIN 28011 (Torispherical), and DIN 28013 (Semi-ellipsoidal) standards
Low profile oval design saves vertical space while maintaining high burst pressure ratings
Sizes: 1/2" to 48" NB (DN 15 to DN 1200) in hot pressed and spun execution
Wall schedules: Sch 10S, 40S, STD, 80S, XS, 160, and custom vessel wall thicknesses
Ready for quotationShare your range, connection and case requirement.
Talk to ATHStandardASME B16.9, DIN 28011, DIN 28013, EN 10253
Size Range1/2" to 48" (DN 15 to DN 1200)
Schedules / ThicknessSch 10S to XXS and custom plate thicknesses up to 50 mm
MaterialsASTM A234 WPB, A516 Gr. 70, A403 WP316L, Duplex 2205
CertificationsISO 9001:2015, PED 2014/68/EU, EN 10204 3.1
Technical Specifications
ASME B16.9 Oval / Ellipsoidal Cap Specifications
Select nominal diameter, schedule, and material grade for oval vessel caps.
GeometryLow Profile Oval
Sizes1/2" to 48"
StandardASME B16.9 / DIN 28011
ApplicationVessels & Headers
Part Number Example
SKL-OC-060-SCH40-316L
SKLBrandSkyland Metal & Alloys
OCTypeOval Buttweld Vessel Cap
060Size6" NPS (DN 150)
SCH40ScheduleSchedule 40
316LMaterialASTM A403 WP316L
Technical specifications
Design StandardASME B16.9 / DIN 28011 / DIN 28013
Weld PrepASME B16.25 Beveled Skirt
Operational Notes
Low profile curvature saves valuable axial length on pressure vessel skids.
Product Overview
Oval and torispherical caps are used to terminate large header pipes and pressure vessels where space envelope constraints prevent the use of high-dome hemispherical heads.