Flanges to EN 1092-1 and ASME B16.5
At Nirotec, we supply flanges for industrial piping systems – in all common designs, pressure ratings and materials. From standard flanges to special designs to EN/ASME in duplex, Super Duplex or nickel alloys – with complete documentation and test certificates.
Manufacturing & Properties
Manufacturing is carried out using forging processes or machining, ensuring high material density and a uniform microstructure. This is followed – depending on material and application – by heat treatment and final machining of the sealing faces and connection geometries.
Through controlled manufacturing processes, we achieve high dimensional accuracy, precise sealing faces and reliable mechanical load capacity of the components.
Our flange designs:
To EN 1092-1:
- Weld neck flange (Type 11 – Weld Neck)
- Plate flange (Type 01 – Slip-On)
- Blind flange (Type 05)
- Lap joint flange with weld-on collar (Type 13)
- Threaded flange (Type 02)
- Socket weld flange (Type 12)
Pressure ratings:
- PN 6
- PN 10
- PN 16
- PN 25
- PN 40
- PN 63
- PN 100
- PN 160
- PN 250
- PN 320
- PN 400
To ASME B16.5:
- Weld Neck Flange
- Slip-On Flange
- Blind Flange
- Threaded Flange
- Socket Weld Flange
- Lap Joint Flange
Pressure classes:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
To ASME B16.47:
- Large Diameter Flanges Series A (MSS SP-44)
- Large Diameter Flanges Series B (API 605) For nominal sizes from DN 600 / NPS 24
Facing types:
- RF – Raised Face – standard
- FF – Flat Face
- RTJ – Ring Type Joint (ring groove) – for high-pressure offshore applications
- LG / TG – Tongue & Groove
- SW – Spiral Wound – on request
Standards & codes:
- EN 1092-1 – Flanges and their joints, Europe
- ASME B16.5 – Pipe Flanges and Flanged Fittings
- ASME B16.47 – Large Diameter Steel Flanges
- API 605 – Large Diameter Carbon Steel Flanges
- EN 13480 – Metallic industrial piping
- AD 2000 – Pressure equipment, Germany
- NORSOK M-630 – Offshore piping components
- KTA 3201 / RCC-M – Nuclear engineering
- Project-specific specifications on request
Materials & Standards
Our flanges are manufactured from a wide range of industrial materials. Depending on application, temperature, pressure and corrosion requirements, we supply components from different material groups.
Additional materials 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 materials:
CuNi10Fe1,6Mn / C70600 / 90-10 CuNi
CuNi70/30 / C71500
Zirconium 702 / UNS R60702
Quality testing & 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 sealing face inspection
- Non-destructive testing (UT, RT, PT, MT)
- Positive Material Identification (PMI)
- Hardness testing
- Ferrite measurement for duplex materials
- Third-party inspections by TÜV, Bureau Veritas, DNV or customer inspectors
- Test certificates to EN 10204 (3.1 / 3.2)
- Project-specific ITPs with hold and witness points on request
In addition to standard flanges from our supply program, we also manufacture special flanges to drawing on request – for dimensions and geometries outside standardized programs.
Materials
Applications & Industries
In use worldwide
Our flanges are key connecting elements in industrial piping systems and enable safe installation and maintenance of complex plant components.
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 size or special material?
At Nirotec, we also manufacture flanges outside the standard range – heavy-wall, in special materials, with extended through-hub lengths. Speak to our sales team directly.