DIN Flanges Suppliers

DIN flanges are available in a wide range of nominal pressure ratings, also known as PN (Pressure Nominale). These pressure classes define the maximum pressure a flange can withstand at a reference temperature.

Standard DIN flange pressure ratings include:

1. PN6 – Suitable for low-pressure water and HVAC applications
2. PN10 – Used in water distribution and basic fluid systems
3. PN16 – Most commonly used in industrial pipelines
4. PN25 & PN40 – For higher pressure in steam, gas, and chemical systems
5. PN64, PN100, PN160, PN250 & PN400 – For specialized high-pressure systems

These PN ratings correspond to specific bolt patterns, gasket dimensions, and wall thickness, and are critical for ensuring compatibility and safety in design.

Selecting the correct DIN flange type depends on several technical factors, such as connection method, pressure rating, pipe size, and application environment. DIN standards specify multiple flange types, each with a unique function and construction.

Common DIN flange types and their use cases:

• DIN 2633 – Weld Neck Flange (PN16):

  Ideal for high-pressure and high-temperature systems with butt-welded connections.

• DIN 2576 – Slip-On Flange (PN10):

  Used for low-pressure pipelines where welding is done on both sides.

• DIN 2527 – Blind Flange:

  Designed to seal the end of a pipeline or vessel, suitable for inspection and pressure testing.

• DIN 2566 – Threaded Flange:

  Common in smaller bore connections without welding, often in water or compressed air lines.

• DIN 2642 – Loose Flange with Stub End:

  Used where frequent dismantling is required, often paired with PTFE or other gasketed stub ends.

To ensure proper selection:

• Confirm PN rating (pressure class)
• Match face type (RF, FF) with gaskets
• Validate with material compatibility and standards

Yes, many DIN flange types are functionally compatible with EN 1092-1 flanges, as EN 1092-1 was developed to standardize and replace various national standards, including older DIN specifications.

Here’s how they relate:

1. DIN → EN 1092-1 Equivalents:
   • DIN 2633 ≈ EN 1092-1 Type 11 (Weld Neck)
   • DIN 2576 ≈ EN 1092-1 Type 01 (Slip-On Plate Flange)
   • DIN 2527 ≈ EN 1092-1 Type 05 (Blind Flange)
   • DIN 2566 ≈ EN 1092-1 Type 13 (Threaded Flange)
   • DIN 2642 ≈ EN 1092-1 Type 02 (Loose Flange with Stub End)

Compatibility Considerations:

• Dimensions may differ slightly, especially in bolt holes, flange thickness, or face finish tolerances.
• Ensure both flanges share the same PN rating (e.g., PN16) and face type (RF, FF).
• Gasket selection must also match the surface finish and pressure class of both flanges.

While they are generally compatible, consulting technical datasheets or a qualified engineer is advisable when mixing DIN and EN systems.

Selecting the right gasket is crucial to ensure a leak-proof and reliable seal in DIN flange connections. Gasket compatibility depends on the face type, pressure class (PN), fluid media, and temperature range.

Common gasket types used with DIN flanges include:

1. Spiral Wound Gaskets (SWG):

   Suitable for DIN flanges with raised face (RF) connections in high-pressure and temperature applications. Often used in petrochemical and power plants.

2. Metal Jacketed Gaskets:

   Used in steam lines and process industries, especially with DIN weld neck flanges.

3. Flat Gaskets (Non-metallic):

   Made from materials like EPDM, Graphite, PTFE, or CNAF, these are common with flat face (FF) flanges under moderate pressures (PN6–PN16).

4. Ring Type Joint Gaskets (RTJ):

   Though less common in DIN series, RTJ can be custom-fitted for special sealing needs.

Important Considerations:

• Match the gasket material to media compatibility (e.g., PTFE for chemicals, Graphite for steam).
• Ensure gasket dimensions follow DIN standards — DIN 2690 and EN 1514 are typically referenced.
• For PN ≥ 40, reinforced metallic gaskets are generally recommended.

Nutech Overseas is a trusted global supplier of DIN standard flanges, exporting high-quality forged and plate flanges that meet DIN and EN specifications to industries worldwide.

Our key export destinations include:

1. Europe: Germany, France, Spain, Italy, Netherlands, Belgium, Poland, Czech Republic
2. Middle East: UAE, Saudi Arabia, Oman, Qatar, Bahrain, Kuwait
3. Africa: Egypt, South Africa, Nigeria, Morocco
4. Southeast Asia: Indonesia, Vietnam, Malaysia, Philippines, Thailand
5. South Korea & Japan
6. South America: Brazil, Chile, Argentina
7. Australia & New Zealand

Export Capabilities:

• Full compliance with EN 10204 3.1 / 3.2 certification
• Standard and custom packaging with third-party inspection (TPI) support
• Rapid logistics and documentation support for global project supply