Size: DN250 | Material: Stainless Steel SS304/316L
The DIN 86029 standard specifies flanges used primarily in shipbuilding and marine exhaust/water systems. As a Slip-On (Hubbed) type, it is designed to slide over the pipe and be welded both internally and externally to provide sufficient strength and prevent leakage.
1. Product Overview
The DN250 PN10 variant is a heavy-duty marine component designed for large-bore piping. Its "Slip-On" design simplifies alignment, making it a preferred choice for shipyard installations where space and maneuverability can be challenging.
2. Technical Specifications (DN250 / PN10)
| Parameter | Specification (DIN 86029) |
| Nominal Diameter | DN250 (10 Inch) |
| Pressure Rating | PN10 (10 Bar) |
| Outer Diameter (D) | 395 mm |
| Bolt Circle Diameter (K) | 350 mm |
| Number of Bolt Holes | 12 |
| Bolt Hole Diameter (L) | 22 mm |
| Flange Thickness (b) | 26 mm |
| Facing | Type C (Raised Face - RF) |
3. Material Excellence: Stainless Steel
To withstand the harsh, corrosive nature of marine environments, we offer this flange in high-grade stainless steel:
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SS316L (1.4404): Recommended for seawater-facing applications. The low carbon content prevents sensitization during welding, ensuring maximum corrosion resistance at the weld joints.
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SS304 (1.4301): Suitable for freshwater systems, sewage treatment, and non-corrosive marine utilities.
4. Key Advantages
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Marine Certified Design: Specifically engineered to meet the structural requirements of the shipbuilding industry.
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Raised Face (RF) Sealing: The 2mm raised face concentrates more pressure on a smaller gasket area, ensuring a superior seal at PN10 pressure levels.
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Ease of Fitment: The slip-on nature allows for slight adjustments in pipe length and easier alignment of bolt holes compared to weld-neck flanges.
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Superior Durability: High resistance to pitting and crevice corrosion in humid, salty atmospheres.
5. Applications
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Shipbuilding: Ballast systems, bilge piping, and seawater cooling.
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Offshore Platforms: Utility piping and firewater systems.
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Marine Exhausts: Engine room piping and ventilation.
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Water Treatment: Coastal desalination plants.
6. Quality Assurance
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Dimension Check: Precise machining of the DN250 bore for a perfect "slip" fit over the pipe.
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Surface Finish: Smooth, CNC-machined raised face to ensure optimal gasket seating.
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Documentation: EN 10204 3.1 Mill Test Certificates provided with every shipment.
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