OEM manufacturer EN 1092-1:2018 · EN 10222 (forgings)
EN 1092-1 / DIN Flanges — PN 2.5 to PN 400
EN 1092-1 is the European standard for PN-designated circular steel flanges, which replaced the older DIN flange standards. Teshi Group manufactures EN 1092-1 flanges in all common types, PN ratings and facings, in European and ASTM-equivalent carbon and stainless steels.
Also called: DIN flanges, EN flanges, PN flanges, PN16 flange, BS EN 1092-1 flanges, DIN 2633 flange
What are EN 1092-1 / DIN Flanges?
EN 1092-1:2018 covers steel flanges from DN 10 to DN 4000 and PN 2.5 to PN 400. Each flange is designated by a type number, a facing letter and a PN rating, for example 'EN 1092-1/11/B1/DN100/PN16'. Type numbers identify the construction: 01 plate, 02 and 04 loose flanges with collars, 05 blind, 11 weld neck, 12 hubbed slip-on, 13 hubbed threaded and 21 integral. Older drawings may cite DIN 2633 or DIN 2576, which EN 1092-1 replaced; dimensions are largely the same.
Key features
- All common types: 01, 02, 04, 05, 11, 12, 13, 21
- Collars Type 32–37 for loose flange assemblies
- Facings A (flat), B1/B2 (raised), C/D (tongue/groove), E/F (spigot/recess), G/H (O-ring)
- Marking with EN designation, PN, DN and material
- Drilled to EN bolt pattern; dual drilling to ASME on request
Specification
| Supply | OEM manufacturer — Teshi Group, India |
|---|---|
| Standard | EN 1092-1:2018 (DN 10–DN 4000) |
| PN ratings | PN 2.5, 6, 10, 16, 25, 40, 63, 100, 160, 250, 320, 400 |
| Flange types | 01 plate; 02 loose plate flange (with collars Type 32, 33, 35, 36, 37); 04 loose flange (with weld-neck collar Type 34); 05 blind; 11 weld neck; 12 hubbed slip-on; 13 hubbed threaded; 21 integral |
| Facing | A, B1, B2, C, D, E, F, G, H |
| EN grades — carbon steel | P245GH (1.0352), P250GH (1.0460), P265GH (1.0425), S235JR; ASTM A105 |
| EN grades — stainless steel | 1.4301, 1.4307, 1.4401, 1.4404, 1.4571; ASTM A182 equivalents |
| EN grades — low temperature | P355NL1 (1.0566), P275NL1 (1.0488) |
| Materials — carbon steel | ASTM A105 / A105N; ASTM A181 Cl 60, Cl 70; ASTM A266 Gr 2, Gr 4 (large forgings) |
| Materials — high-yield carbon steel | ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70 (MSS SP-44 grades F52–F70) |
| Materials — low-temperature carbon steel | ASTM A350 LF1, LF2 Cl 1, LF2 Cl 2, LF3, LF6, LF9 |
| Materials — alloy steel (Cr-Mo) | ASTM A182 F1, F2, F5, F5a, F9, F11 Cl 1 / 2 / 3, F12 Cl 1 / 2, F21, F22 Cl 1 / 3, F22V, F91, F92, F911; ASTM A336 F11, F22 (large forgings) |
| Materials — stainless steel | ASTM A182 F304, F304L, F304H, F304LN, F309H, F310, F316, F316L, F316H, F316LN, F316Ti, F317, F317L, F321, F321H, F347, F347H, F348 |
| Materials — 904L and 6Mo | 904L (ASTM A182 F904L, UNS N08904); 254 SMO / 6Mo (ASTM A182 F44, UNS S31254); AL-6XN (ASTM A182 F62, UNS N08367) |
| Materials — duplex stainless steel | ASTM A182 F51 (UNS S31803), F60 (UNS S32205, 2205) |
| Materials — super duplex stainless steel | ASTM A182 F53 (UNS S32750, 2507), F55 (UNS S32760), F61 (UNS S32550) |
| Materials — nickel alloys | ASTM B564 / B160 / B462: Nickel 200 / 201 (N02200 / N02201), Monel 400 (N04400), Monel K-500 (N05500), Inconel 600 (N06600), Inconel 625 (N06625), Inconel 718 (N07718), Incoloy 800 / 800H / 800HT (N08800 / N08810 / N08811), Incoloy 825 (N08825), Hastelloy C276 (N10276), Hastelloy C22 (N06022), Hastelloy B2 / B3 (N10665 / N10675), Alloy 20 (N08020) |
| Materials — titanium | ASTM B381 Grade F1, F2, F5 (Ti-6Al-4V), F7, F12 |
| Materials — copper-nickel | Cu-Ni 90/10 (UNS C70600) and 70/30 (UNS C71500), ASTM B151 bar; flanges to ASME B16.5 or EEMUA 145 |
| Grade availability | Every grade listed is made or supplied against order, with EN 10204 3.1 certificates (3.2 / third-party inspection when specified) and PMI on alloy, stainless, duplex and nickel grades. |
| Testing | Visual and dimensional inspection, PMI on alloy and stainless grades, hardness; UT, MPI/DPI as specified |
| Documents | EN 10204 3.1 certificate; 3.2 / third-party inspection when the order specifies; dimensional inspection report |
Applications
- European-designed process plants and skids
- Water and wastewater treatment
- HVAC, district heating and utility piping
- Pumps, valves and equipment built to EN / DIN
- Chemical and pharmaceutical plants
EN 1092-1 PN flanges vs ASME B16.5 Class flanges
EN 1092-1 rates flanges by PN (nominal pressure in bar at reference temperature) and uses metric DN sizes and bolting. ASME B16.5 rates by Class with inch NPS and bolting. Bolt circles and drillings generally differ, so PN and Class flanges should not be assumed to mate. Class-designated flanges in Europe are covered separately by EN 1759-1. State DN and PN, not NPS.
Technical data sheets
Dimensions & weights
Material grades
All gradesFAQ
EN 1092-1 / DIN Flanges: common questions
What do Type 01, 05 and 11 mean?
They are EN 1092-1 flange types: Type 01 is a plate flange for welding, Type 05 is a blind flange and Type 11 is a weld neck flange. Type 12 is a hubbed slip-on, Type 13 hubbed threaded, Type 02 and 04 are loose flanges and Type 21 is integral.
How do I read an EN 1092-1 designation?
For example, 'EN 1092-1/11/B1/DN150/PN40/P250GH' means a Type 11 weld neck flange, raised face B1, DN 150, PN 40, in P250GH. Add the pipe wall thickness for the bore.
What replaced DIN 2633?
DIN 2633 (weld neck, PN 16) was replaced by EN 1092-1 Type 11, PN 16. Similarly DIN 2576 plate flanges became Type 01 and DIN 2527 blind flanges became Type 05.
What is the difference between facing B1 and B2?
Both are raised faces. They differ in specified surface roughness: B1 is the standard raised face and B2 has a finer finish for specific gaskets. Specify which one your gasket supplier requires.
Can you supply EN flanges in ASTM materials?
Yes, when the purchaser accepts it, EN 1092-1 dimensions can be made in ASTM A105 or A182 F304L/F316L, with the material group checked for the required PN rating.
Need a size or grade not listed here?
Our engineering team manufactures against your drawing or datasheet, with dimensional sign-off before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
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