Pipe caps and dished ends – to EN 10253 and ASME B16.9
We supply seamless pipe caps and dished ends for industrial piping systems and pressure vessels – from our own production and targeted sourcing. From standard caps in non-alloy steels to special designs in duplex, P91 or nickel alloys – compliant with standards, documented and delivered on time.
Manufacturing & properties
Our pipe caps and dished ends are manufactured from seamless pipes or plates and are cold- or hot-formed depending on the material, dimensions and requirements. Forming is carried out using pressing and forming processes that ensure uniform wall thickness distribution and high dimensional accuracy. This is followed – depending on the material and application – by heat treatment and machining.
Typical designs:
Pipe caps to EN 10253 / ASME B16.9:
- Domed pipe caps – standard for pipe terminations
- Flat caps – for low-pressure applications
- Special geometries to drawing
Dished Ends:
- DIN 28011 Klöpper dished end – standard for pressure vessels in Europe
- DIN 28013 torispherical dished end – flatter design, space-saving
- Hemispherical end – for high-pressure applications
- Flat end – for low-pressure vessels
- Conical end – for silos and vessels with outlet
All designs are also available in special dimensions and special alloys on request.
Technical key data
- Manufactured from pipe or plate
- Various diameter ranges and wall thicknesses
- Special geometries to drawing possible
- Heat treatment in our in-house furnace
Standards & codes
- EN 10253-2 / EN 10253-4 – Seamless pipe fittings Europe
- ASME B16.9 – Factory-Made Wrought Buttwelding Fittings
- DIN 28011 – Klöpper dished ends
- DIN 28013 – torispherical dished ends
- EN 13480 – Metallic industrial piping
- AD 2000 – Pressure equipment Germany
- ASME B31.1 – Power Piping
- ASME B31.3 – Process Piping
- ASME VIII – Pressure vessels
- NORSOK M-630 – Offshore piping components
- KTA 3201 / RCC-M – Nuclear technology
- Project-specific specifications on request
Materials & standards
Our caps are manufactured from a wide range of industrial materials. Depending on application, temperature, pressure and corrosion requirements, we supply components from different material groups.
Further materials and project-specific material requirements on request.
Unalloyed & low-alloy steels:
P235GH / 1.0345
P265GH / 1.0425
P355GH / 1.0566
L360 / 1.0582 / API 5L X52
L415 / 1.8972 / API 5L X60
WPB / A234 WPB / Carbon Steel
WPHY70 / A860 WPHY70
Low-temperature steels:
WPL3 / A420 WPL3
WPL6 / A420 WPL6
LF2 / A350 LF2
P355NL2
P460NL2
10Ni14
12Ni14 / 1.5637
Heat-resistant steels:
16Mo3 / 1.5415
WP11 / P11 / 1.7335 / 13CrMo4-5
WP22 / P22 / 1.7380 / 10CrMo9-10
WP91 / P91 / 1.4903 / X10CrMoVNb9-1
WP92 / P92 / 1.4901 / X10CrWMoVNb9-2
X20 / 1.4922 / X20CrMoV11-1
WB36 / 1.6368 / 15NiCuMoNb5
Austenitic stainless steels:
304 / 1.4301 / X5CrNi18-10 / V2A
304L / 1.4307 / X2CrNi18-9 / TP304L / WP304L
316L / 1.4404 / X2CrNiMo17-12-2 / TP316L / WP316L / V4A
316Ti / 1.4571 / X6CrNiMoTi17-12-2 / TP316Ti / WP316Ti
321 / 1.4541 / X6CrNiTi18-10 / TP321 / WP321
347H / 1.4912 / X7CrNiNb18-10 / TP347H / WP347H
310S / 1.4845 / X8CrNi25-21 / TP310S / WP310S
Duplex & Super Duplex
Duplex / 1.4462 / X2CrNiMoN22-5-3 / UNS S31803 / F51
Super Duplex / 1.4410 / X2CrNiMoN25-7-4 / UNS S32750 / F53
Super Duplex / 1.4501 / X2CrNiMoCuWN25-7-4 / UNS S32760 / F55
254SMO / 1.4547 / X1CrNiMoCuN20-18-7 / UNS S31254
Alloy 926 / 1.4529 / X1NiCrMoCuN25-20-7 / UNS N08926
904L / 1.4539 / X1NiCrMoCu25-20-5 / UNS N08904
Nickel alloys:
Monel 400 / 2.4360 / UNS N04400
Alloy 625 / 2.4856 / UNS N06625 / Inconel 625
Alloy 825 / 2.4858 / UNS N08825 / Incoloy 825
Alloy C-276 / 2.4819 / UNS N10276 / Hastelloy C-276
Alloy 718 / 2.4668 / UNS N07718
Alloy 800H / 1.4876H / UNS N08810
Alloy C-22 / 2.4602 / UNS N06022 / Hastelloy C-22
Copper-nickel & special alloys:
CuNi10Fe1,6Mn / C70600 / 90-10 CuNi
CuNi70/30 / C71500
Zirconium 702 / UNS R60702
Quality inspection & documentation
Manufacturing and testing within the scope of our QM system to ISO 9001 and AD 2000. Typical testing services:
- Visual inspection
- Dimensional inspection and wall thickness measurement
- Non-destructive testing (UT, RT, PT, MT)
- Positive Material Identification (PMI)
- Hardness testing
- Ferrite measurement for duplex materials
- External inspections by TÜV, Bureau Veritas, DNV or customer inspectors
- Inspection certificates to EN 10204 (3.1 / 3.2)
- Project-specific ITPs with hold and witness points on request
Applications & industries
In use worldwide
Pipe fittings such as pipe caps, elbows, tees and reducer are essential components of industrial piping systems and are used in particular in energy, chemical and process plants.
Energy and Power Plant Facilities
Nuclear Technology
Hydrogen and Energy Infrastructure
Chemical and Process Industry
Refineries and Offshore Facilities
Apparatus and Mechanical Engineering
Looking for a special dimension or special alloy?
Nirotec also manufactures pipe caps and dished ends outside the standard range. Please contact our sales team directly.