EN 1092-1 Flanges Suppliers

PN6 to PN40 DIN Flanges

EN 1092-1 Flanges Suppliers

EN 1092-1 Type 11 Standard Flanges: Dimensions | Specifications | Material Grade | Standards | About EN 1092-1 | All Product Types

EN 1092-1 is the European standard for circular flanges made of steel, commonly used in pressure systems, pipelines, valves, and equipment across various industries. These flanges are designed with nominal pressure ratings from PN6 up to PN40, and are available in multiple face finishes and flange types to ensure compatibility and sealing reliability in both low- and high-pressure environments.

At Nutech, we manufacture and supply a wide range of EN 1092-1 flanges in accordance with Type 01 (weld neck), Type 05 (blind), Type 11 (slip-on), Type 13 (threaded), Type 21 & 34 (loose flanges over stub ends), and Type 36 (integral). These flange types conform to DIN and ISO designations and are available in raised face (RF), flat face (FF), and tongue & groove face options.

Our EN flanges are produced using high-quality materials such as carbon steel, stainless steel, and alloy steel, with surface finishes and dimensional tolerances that fully comply with EN 1092-1 specifications. Sizes range from DN10 to DN2000, with drilling patterns and face thickness matching the required pressure class.

Each flange is precisely machined to ensure proper fitment, and our offering includes custom bore dimensions, machined gasket faces, and protective coatings for corrosive service. Whether for water pipelines, refineries, shipbuilding, or fire protection systems, our EN 1092-1 flanges meet all performance and regulatory requirements for European and international markets.

EN 1092-1 Flange Dimensions Chart, PN Pressure Ratings, Tolerances, and Face Types for Type 01 to Type 36.

For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our EN 1092-1 Type 01 Standard Flanges, please download the full Catalog PDF below.

Manufacturer of EN 1092-1 Flange Types and Industrial Applications – Including Weld Neck, Blind, Slip-On, Threaded, and Loose Flanges.

Technical Specifications of EN 1092-1 Standard Flange

Specification Details
Standard EN 1092-1 (European Norm for circular flanges made from steel)
Flange Types Type 01 (Weld Neck), Type 05 (Blind), Type 11 (Slip-On), Type 13 (Threaded), Type 21 & 34 (Loose), Type 36 (Integral)
Size Range DN10 to DN2000 (½″ to 80″ nominal bore)
Pressure Ratings PN6, PN10, PN16, PN25, PN40
Face Types Raised Face (RF), Flat Face (FF), Tongue & Groove (TG), Male & Female (M&F)
Flange Face Finish Stock Finish (3.2 – 6.3 μm Ra), Smooth Finish, Serrated Finish
Drilling Template As per EN 1092-1 drilling patterns (Bolt Circle Diameter, No. of Holes, Hole Diameter)
Thickness Tolerance As per EN dimensional tolerances (refer to EN 1092-1 Table 8 for tolerances)
Coating / Protection Transparent Varnish, Anti-Rust Coating, Hot-Dip Galvanized, Painted (on request)
Inspection & Testing Dimensional Check, Visual Inspection, PMI, Hydro Testing (on request)
Certification EN 10204 3.1 / 3.2, PED 2014/68/EU, ISO 9001:2015, CE Marking (where applicable)
Application Industries Water Supply, Oil & Gas, Marine, HVAC, Petrochemical, Power Generation, Fire Protection, Pulp & Paper
Origin Made in India (by Nutech Overseas)
Export Network USA, Europe, and Middle East

Complete Material Grade Chart - EN 1092-1 Type 05 Flange

Material Category Type 13 EN 1092-1 Flange Grades
Stainless Steel EN 1092-1 Flange ASTM A182 F304 / F304L / F304H, F316 / F316L / F316Ti, F310, F309S, F317 / F317L, F321 / F321H, F347 / F347H, F904L, ASTM A351 CF3 / CF3M / CF8 / CF8M / CF8C, DIN 1.4301, 1.4306, 1.4307, 1.4311, 1.4401, 1.4404, 1.4408, 1.4409, 1.4541, 1.4571, 1.4550, 1.4435, 1.4539
Duplex Steel EN 1092-1 Flange ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205
Super Duplex Steel EN 1092-1 Flange ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760
Carbon Steel EN 1092-1 Flange ASTM A105 / A105N, ASTM A350 LF2, ASTM A694 F52 / F56 / F60 / F65 / F70 / F80, ASTM A216 WCB, DIN 1.0460 / 1.0402 / 1.0619, Die Steel, Mild Steel
Alloy Steel EN 1092-1 Flange ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140
Nickel Alloy EN 1092-1 Flange Nickel 200 / 201, ASTM B564
Monel EN 1092-1 Flange Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564
Inconel EN 1092-1 Flange Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564
Incoloy EN 1092-1 Flange Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564
Hastelloy EN 1092-1 Flange Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564
Alloy 20 EN 1092-1 Flange Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462
254 SMO EN 1092-1 Flange SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182
Copper Nickel EN 1092-1 Flange Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152
Copper EN 1092-1 Flange TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc.
Brass EN 1092-1 Flange Grades 3602, 2604, H59, H62, etc.
Aluminium EN 1092-1 Flange Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc.
Titanium EN 1092-1 Flange ASTM B381 Gr.1 / Gr.2 / Gr.4 / Gr.5 / Gr.7, UNS R50250 / R50400 / R50550 / R50700 / R52400 / R53400 / R56320 / R56400
Other Special Grades Al6XN, Tin Bronze, Aluminium Bronze, Lead Bronze, Nimonic 75 / 80A / 90

International Flange Standards We Manufacture & Supply

What is EN 1092-1 and how is it different from ANSI/ASME flange standards?

EN 1092-1 is a European standard that defines the dimensions, tolerances, materials, and pressure classes for circular steel flanges. It is widely used across Europe, the Middle East, and Africa, and is often specified for piping systems that conform to DIN and ISO standards.

Here’s how it differs from ANSI/ASME flange systems:

  • Pressure Classes: EN flanges use the PN (Pressure Nominale) system such as PN6, PN10, PN16, PN25, PN40, whereas ASME uses Class 150, 300, 600, etc.
  • Flange Types: EN 1092-1 defines flange types using numbers (e.g., Type 01 for weld neck, Type 05 for blind) instead of naming conventions.
  • Bolt Patterns: Bolt circle diameters, number of bolt holes, and flange thickness vary significantly between EN and ASME standards.
  • Face Finish & Thickness: EN tolerances and face finishes may differ from ASME B16.5 or B16.47 flanges, making interchangeability difficult without adjustments.

Important Note: When selecting between EN 1092-1 and ASME flanges, it's essential to match the entire system — including bolts, gaskets, and mating components — to ensure safety and fit.

What are the different types of EN 1092-1 flanges and their design codes?

EN 1092-1 classifies flanges into various Type Codes, each representing a specific design configuration suited for different piping applications. These codes help buyers and engineers identify the exact flange required based on connection method, facing, and mounting technique.

Here’s a quick breakdown:

  1. Type 01 – Weld Neck Flange: Designed for high-pressure applications; welded directly to pipe necks to ensure structural integrity and stress distribution.
  2. Type 05 – Blind Flange: Used to close the end of piping systems; ideal for inspection or isolation.
  3. Type 11 – Slip-On Flange: Slides over the pipe; easier to install but lower pressure rating than weld neck types.
  4. Type 13 – Threaded Flange: Screwed into male-threaded pipes; best suited for low-pressure, non-welded systems.
  5. Type 21 & 34 – Loose Flanges: Used with stub ends or lapped joints; excellent for corrosion-prone systems or where frequent dismantling is required.
  6. Type 36 – Integral Flange: A forged piece machined to form part of valves or equipment; offers enhanced strength.

Tip for Engineers: Always refer to EN 1092-1 Table 1 for selecting the correct flange type based on the nominal size (DN), pressure rating (PN), and face finish.

How are EN 1092-1 flange pressure ratings (PN) defined and selected?

In the EN 1092-1 standard, PN (Pressure Nominale) refers to the pressure rating of a flange, expressed in bars. The PN rating indicates the maximum allowable operating pressure at a reference temperature of 20°C (68°F). Unlike ASME flange classes, EN flanges follow a metric pressure system.

Common PN Ratings Include:

  • PN6 – For low-pressure systems (e.g., water supply lines).
  • PN10 / PN16 – Standard for general-purpose piping.
  • PN25 / PN40 – For higher pressure industrial systems, including steam and process piping.

Important Considerations:

  • The pressure-temperature relationship varies depending on the material group of the flange (e.g., carbon steel vs stainless steel).
  • Bolt pattern, thickness, and dimensions increase with higher PN ratings.
  • Gasket selection must match the PN rating and face type to ensure sealing performance.

Note: Always consult EN 1092-1 Annex G or pressure/temperature rating charts to ensure compatibility with your piping system and operating conditions.

What are the face finish requirements for EN 1092-1 flanges and why are they important?

The face finish of an EN 1092-1 flange is crucial for ensuring a reliable, leak-proof seal between the flange and gasket. Surface roughness directly affects how the gasket compresses and seals under pressure.

Standard Face Finish Types for EN 1092-1:

  1. Stock Finish (Serrated Spiral):
    • Roughness: Typically 3.2 – 12.5 µm (Ra)
    • Most commonly used for metallic and soft gaskets
    • Provides good grip to hold the gasket in place
  2. Smooth Finish (Flat Smooth Face):
    • Roughness: ≤ 3.2 µm (Ra)
    • Used with soft non-metallic gaskets
    • Requires higher bolt load for effective sealing
  3. Concentric Serrated Finish:
    • Similar to spiral but with concentric grooves
    • Preferred in some applications with softer gaskets

Why it matters:

  • A mismatch between face finish and gasket material can lead to leakage.
  • Proper finish improves gasket compression, especially under fluctuating pressure or thermal conditions.
  • EN 1092-1 specifies surface roughness based on gasket type and PN rating.

Always ensure flange face finish complies with EN 1092-1 Clause 6.7 to meet sealing performance expectations.

In which countries does Nutech export EN 1092-1 standard flanges?

Nutech Overseas is a trusted global supplier of EN 1092-1 standard flanges, exporting to over 40 countries with full documentation and quality certifications. Our products comply with European standards and are widely used in infrastructure, oil & gas, chemical, and water treatment industries.

Key Export Destinations Include:

  1. USA
  2. Europe: Germany, Spain, Italy, Poland, Netherlands, France, Romania, Czech Republic
  3. Middle East: UAE, Saudi Arabia, Oman, Kuwait, Qatar, Bahrain, Iraq
  4. Africa: Egypt, Nigeria, South Africa, Morocco
  5. Southeast Asia: Singapore, Indonesia, Malaysia, Vietnam, Thailand, Philippines
  6. South America: Brazil, Chile, Argentina
  7. Other Regions: Australia, Turkey, South Korea

All flanges are supplied with EN 10204 3.1/3.2 certificates, dimensional test reports, and proper export packaging, ensuring safe delivery and international compliance.

Browse The Products

ASME B16.11 Forged Fittings

Forged Fittings

PDF Icon

Forged Fittings

Get More Details
ASME B16.5 Flanges

Flanges