Stainless Steel DIN Flanges, SS DIN Flanges, Alloy Steel DIN Flanges Manufacturer & Exporter in India
DIN 2527 Blind Flanges, DIN Plate Flanges, DIN Weld Neck Flanges, DIN Threaded Flanges - Stocked & Supplied Globally.
DIN Flanges Overview
Since 1995, Amardeep Steel has been manufacturing and supplying DIN Flanges from Mumbai, serving engineering contractors, procurement houses, and plant operators across six continents. Our DIN flange range is built to German DIN standards, the same specifications that shaped European industrial piping for decades, and still widely called out on drawings and BOMs across the Middle East, Southeast Asia, and beyond.
Yes, EN 1092-1 has largely taken over in Europe. But walk into any retrofit project, legacy plant, or international job site, and DIN is still what engineers are specifying. That's exactly why we keep it stocked.
Every flange we ship goes through forging and precision machining, not just cutting or stamping. This matters for dimensional accuracy, especially when you're working with PN64 or PN100 pressure classes where tolerances are tight and a poorly machined bore face will cause problems downstream. We cover the full size range from DN10 to DN2000, and pressure ratings from PN6 right through to PN100.
Need Weld Neck, Blind, Slip-On, Threaded, or Plate Flanges? We stock them. Need an odd size or a material cert for a Norway offshore project? We handle that too. Whatever the DIN flange dimension or pressure class you're working with, call our Mumbai team directly and we'll confirm availability and turn around a quote the same day.
Table of Contents
DIN Flanges Specifications
| Parameter | Details |
|---|---|
| Size Range | DN10 to DN2000 (1/2" to 48") |
| Pressure Ratings | PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160 |
| Standards | DIN 2527, DIN 2565, DIN 2566, DIN 2573, DIN 2576, DIN 2631-2635 |
| Manufacturing Process | Forged, Stamped, Machined |
| Face Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove (T&G) |
| Materials | Stainless Steel, Carbon Steel, Alloy Steel, Duplex, Super Duplex, Inconel, Hastelloy, Titanium, Monel, Copper Nickel |
| Test Certificates | EN 10204/3.1B, 100% Radiography, PMI, Hydrostatic Testing |
| Surface Finish | Serrated, Mirror, Spiral/Concentric, Smooth |
Use this specifications table to quickly identify the right DIN flange for your project. DN (Diameter Nominal) indicates pipe size, while PN (Pressure Nominale) defines pressure rating. All Amardeep Steel DIN flanges are manufactured to these exact tolerances with full material traceability.
DIN Flanges Standard Chart
The DIN standard encompasses a broad range of flange types identified by specific DIN numbers. Below is a comprehensive overview of DIN flange dimensions and their corresponding standards:
| DIN Standard | Type | Pressure Rating |
|---|---|---|
| DIN 2527 | Blind Flanges | PN6 to PN100 |
| DIN 2565 / 2566 | Threaded Flanges | PN6 to PN16 |
| DIN 2567 / 2568 | Threaded Flanges with Neck | PN25 to PN64 |
| DIN 2573 / 2576 | Plate / Slip-On Flanges | PN6 to PN10 |
| DIN 2502 / 2503 | Plate Flanges | PN16 to PN25 |
| DIN 2631 / 2632 | Weld Neck Flanges | PN6 to PN10 |
| DIN 2633 / 2634 / 2635 | Weld Neck Flanges | PN16 to PN40 |
| DIN 2641 / 2642 | Lap Joint Flanges | PN6 to PN10 |
| DIN 2673 | Socket Weld Flanges | PN10 |
| DIN 2656 | Reducing Flanges | PN40 |
Types of DIN Flanges
Amardeep Steel supplies the following DIN Flanges types, all available in forged or plate configurations:
1. DIN Weld Neck Flanges
DIN Weld Neck Flanges (DIN 2631-2638) are designed for high-stress, high-pressure environments. The long tapered hub provides excellent stress distribution and prevents leakage. Ideal for petrochemical, power generation, and refinery applications. Explore our range of Weld Neck Raised Face Flanges for complete specifications.
2. DIN Blind Flanges (DIN 2527)
DIN 2527 Blind Flanges are solid discs used to seal off the end of a piping system or vessel opening for pressure testing and maintenance. Available in PN6 through PN100. Browse our Blind Raised Face Flanges page for more details.
3. DIN Plate Flanges / Slip-On Flanges
DIN Plate Flanges (DIN 2573, DIN 2576, DIN 2502, DIN 2503, DIN 2543), also called slip-on flanges, slide over the pipe and are welded both inside and outside for strength. Our Slip-On Raised Face Flanges and Plate Flanges pages provide full dimensional data.
4. DIN Threaded Flanges
DIN Threaded Flanges (DIN 2565, DIN 2566, DIN 2567, DIN 2568, DIN 2561) screw directly onto the pipe without welding, ideal for systems where welding is not permitted. Available with NPT, BSPT, and BSPP threads. See our Screwed/Threaded Flanges for full specifications.
5. DIN Socket Weld Flanges
DIN Socket Weld Flanges (DIN 2673) feature an internal socket that accepts the pipe end and is then fillet welded externally. Perfect for small-diameter, high-pressure lines. See Socket Weld Raised Face Flanges for our complete range.
6. DIN Loose Flanges / Lap Joint Flanges
DIN Lap Joint Flanges (DIN 2641, DIN 2642) consist of two components, a stub end and a loose backing flange, allowing free rotation for easy bolt-hole alignment. Frequently used with corrosion-resistant stub ends.
7. DIN Reducing Flanges
DIN Reducing Flanges (DIN 2656) connect pipes of different diameters within a single flanged joint, eliminating the need for additional reducer fittings.
8. DIN Orifice Flanges
Designed for flow measurement applications, these flanges include tapped holes for differential pressure connections. View Orifice Flanges for specifications.
Need Help Selecting the Right DIN Flange?
Our technical team can guide you on materials, pressure ratings, and face types. Call: 022-67439130 | Email: sales@amardeepsteel.com
DIN Flange Dimensions Chart
The table below provides a quick reference for DIN flange dimensions across key nominal diameters (DN) and pressure ratings (PN). All measurements are in millimetres (mm). For complete DIN flange dimensions including face thickness (b), bolting details, and weights, refer to the individual DIN standard datasheets.
| Nominal Size | PN6 O.D. | PN10 O.D. | PN16 O.D. | PN25 O.D. | PN40 O.D. | PCD (PN10) | Holes |
|---|---|---|---|---|---|---|---|
| DN 10 (3/8") | 75 | 90 | 90 | 90 | 90 | 60 | 4 x 14 |
| DN 15 (1/2") | 80 | 95 | 95 | 95 | 95 | 65 | 4 x 14 |
| DN 20 (3/4") | 90 | 105 | 105 | 105 | 105 | 75 | 4 x 14 |
| DN 25 (1") | 100 | 115 | 115 | 115 | 115 | 85 | 4 x 14 |
| DN 32 (1-1/4") | 120 | 140 | 140 | 140 | 140 | 100 | 4 x 18 |
| DN 40 (1-1/2") | 130 | 150 | 150 | 150 | 150 | 110 | 4 x 18 |
| DN 50 (2") | 140 | 165 | 165 | 165 | 165 | 125 | 4 x 18 |
| DN 65 (2-1/2") | 160 | 185 | 185 | 185 | 185 | 145 | 4 x 18 |
| DN 80 (3") | 190 | 200 | 200 | 200 | 200 | 160 | 8 x 18 |
| DN 100 (4") | 210 | 220 | 220 | 235 | 235 | 180 | 8 x 18 |
| DN 125 (5") | 240 | 250 | 250 | 270 | 270 | 210 | 8 x 18 |
| DN 150 (6") | 265 | 285 | 285 | 300 | 300 | 240 | 8 x 22 |
| DN 200 (8") | 320 | 340 | 340 | 360 | 375 | 295 | 8/12 x 22 |
| DN 250 (10") | 375 | 395 | 405 | 425 | 450 | 350 | 12 x 22 |
| DN 300 (12") | 440 | 445 | 460 | 485 | 515 | 400 | 12 x 22 |
Note: All dimensions in mm. PCD = Pitch Circle Diameter. Holes shown for PN10; PN6 uses 4 x 11mm holes for DN10-DN65.
DIN Flange Weight Chart
Flange weight varies by size, pressure rating, and material. For logistics and structural calculations, contact our team for detailed weight charts in PDF format. Standard Carbon Steel DIN 2633 PN16 flanges range from 0.3 kg (DN10) to 180 kg (DN600).
DIN Flanges Material Grades
Choose from our extensive material inventory to match your specific corrosion resistance, temperature, and pressure requirements:
| Material | Grade / Specification |
|---|---|
|
SS 304, 304L, 316, 316L, 317, 321, 904L, 347 |
|
|
ASTM A105, A350 LF2, A694 F42–F70 |
|
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ASTM A182 F1, F5, F9, F11, F22, F91 |
|
|
S31803 / S32205 (UNS) |
|
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S32750 / S32760 (UNS) |
|
|
Inconel 600, 601, 625, 718 |
|
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Hastelloy C276, C22, B2, X |
|
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ASTM B381 Gr. 1, 2, 4, 5, 7 |
|
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Monel 400, K500 |
|
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Cu-Ni 70/30, 90/10 |
Additional exotic alloy DIN flanges available in Incoloy 800/825, Alloy 20, SMO 254, Zirconium, Aluminium, and Nickel Alloy grades. Contact us for availability.
DIN Flanges vs ANSI Flanges
Understanding the difference between DIN Flanges and ANSI / ASME B16.5 Flanges is critical for project specification:
- Pressure Rating System: DIN flanges use PN (Pressure Nominale) ratings (PN6-PN400); ANSI flanges use Class ratings (Class 150-2500).
- Dimensions: DIN flanges follow metric dimensions (mm); ANSI flanges use inch-based dimensions.
- Bolt Patterns: DIN and ANSI bolt hole patterns are not interchangeable even at similar pipe sizes.
- Standards Body: DIN is German (Deutsches Institut fuer Normung); ANSI/ASME is American.
- Regional Use: DIN flanges are standard in European and Middle Eastern projects; ANSI/ASME dominates North American and many Asian projects.
- Successor Standard: DIN flanges have largely been replaced by EN 1092-1 in Europe. See our EN 1092-1 Flanges page for the updated standard.
DIN vs EN 1092-1: Understanding the Standards
The DIN standard (Deutsches Institut fuer Normung) has been largely replaced by EN 1092-1 in Europe since 2007. However, DIN flanges remain widely specified in legacy systems, retrofit projects, and global markets outside Europe. Many engineers and procurement teams still reference DIN dimensions due to their long-established use.
EN 1092-1 uses PN ratings like DIN, but with updated dimensional tolerances and expanded pressure/temperature ratings. When specifying new projects in Europe, EN 1092-1 is the current standard. For replacement parts or global projects, DIN remains common.
Amardeep Steel manufactures both DIN and EN 1092-1 flanges. Browse our EN 1092-1 Flanges page for the updated European standard.
Industries Using DIN Flanges
Our DIN Flanges serve a diverse range of industries and applications:
- Oil & Gas: Upstream and downstream piping, refineries, gas processing plants.
- Petrochemical & Chemical: Reactors, heat exchangers, pressure vessels.
- Power Generation: Boilers, steam lines, turbine connections. See our Forged Flanges range.
- Water & Wastewater Treatment: Pumping systems, filtration, distribution networks.
- Pharmaceutical & Food Processing: Stainless steel DIN flanges for hygienic piping.
- Shipbuilding & Marine: Seawater-resistant duplex and copper-nickel DIN flanges.
- HVAC & Industrial Utilities: Cooling water lines, compressed air systems.
Why Choose Amardeep Steel for DIN Flanges?
- 30+ Years Manufacturing Excellence: Established in 1995, Amardeep Steel has supplied DIN flanges to 2,800+ clients across 60+ countries, including major EPC contractors and Fortune 500 companies.
- ISO-Certified Manufacturing: State-of-the-art forging and machining facilities with strict QA protocols.
- Wide Stock: Ready inventory of popular DIN flange sizes and grades for fast delivery.
- Full Material Traceability: EN 10204/3.1B Mill Test Certificates provided with every order.
- Custom Dimensions: DN10 to DN2000, and special sizes per customer drawings.
- Global Export Experience: Exporting to the USA, Europe, Middle East, Southeast Asia, Africa.
- Third-Party Inspection: SGS, BV, TUV, Lloyds, DNV inspection available on request.
- Competitive Pricing: Direct manufacturer pricing without middleman margins.
Explore Our Complete Flanges Range
In addition to DIN Flanges, Amardeep Steel manufactures and supplies the following flange types:
By Type
Frequently Asked Questions (FAQ) - DIN Flanges
What is a DIN Flange?
A DIN Flange is a pipe flange manufactured according to the German Deutsches Institut fuer Normung (DIN) standard for circular flanges in industrial piping systems. DIN flanges are specified by nominal diameter (DN) and pressure rating (PN), and cover types including blind, weld neck, slip-on, threaded, socket weld, lap joint, and reducing flanges.
What are the DIN flange dimensions for DN50 PN16?
For a DN50 PN16 DIN Flange: Outer Diameter (O.D.) = 165 mm, Pitch Circle Diameter (PCD) = 125 mm, Bolt Holes = 4 x 18 mm. These DIN flange dimensions apply to slip-on, weld neck, and blind flange types at PN16 pressure rating.
What is the difference between DIN 2527 and DIN 2633?
DIN 2527 refers to Blind Flanges (solid flanges used to seal piping ends), available from PN6 to PN100. DIN 2633 refers to Weld Neck Flanges at PN16 pressure rating. Both are manufactured to precise DIN flange dimensions for metric piping systems.
What pressure rating is PN16 equivalent to in ANSI Class?
PN16 is approximately equivalent to ANSI Class 150 for many applications, though the exact equivalence depends on the material and temperature. PN25 is roughly between Class 150 and Class 300. Always verify with your engineer for critical applications.
Can DIN flanges be used with ANSI flanges?
DIN and ANSI flanges are not directly interchangeable due to differences in outer diameter, bolt circle diameter, and bolt hole count. Adapter flanges or specially designed transition flanges are required when connecting DIN piping to ANSI piping systems.
What materials are available for DIN Flanges from Amardeep Steel?
Amardeep Steel supplies DIN Flanges in Stainless Steel (SS304, SS316, SS316L, SS904L), Carbon Steel (ASTM A105, A350 LF2), Alloy Steel (ASTM A182 F11, F22, F91), Duplex Steel, Super Duplex, Inconel, Hastelloy, Titanium, Monel, and Copper Nickel.
What bolt torque is recommended for DIN flanges?
Bolt torque depends on flange size, pressure rating, gasket type, and bolt material. For DIN PN16 flanges with standard spiral-wound gaskets, typical torque ranges from 50-80 Nm (DN15-DN50) up to 600-800 Nm (DN300+). Always follow your gasket manufacturer's torque chart and applicable standards (VDI 2230, DIN EN 1591) for critical applications. Contact Amardeep Steel for project-specific torque recommendations.
Request a Quote for DIN Flanges
Looking for a reliable DIN Flanges manufacturer and exporter in India? Contact Amardeep Steel Centre today with your size, material, pressure rating, quantity, and destination requirements.
Phone: 022-67439130 / 022-67439165 | Email: sales@amardeepsteel.com | Contact Us
