316L Low Carbon Molybdenum PN25 RF Blind Flange Marine Offshore Salt Fog High Humidity Pipeline End Cap

EN1092-1 F316L PN25 RF Blind Flange is a medium-high pressure anti-corrosion sealing fitting specially designed for marine and offshore engineering harsh working conditions. Adopting low-carbon molybdenum stainless steel formula, it solves the weld embrittlement, salt spray corrosion and sealing failure problems of ordinary 316 blind flanges in coastal and marine environments. The PN25 (2.5MPa) medium-high pressure rating adapts to marine ballast water, fire protection and offshore platform process pipeline heavy-load sealing working conditions.

Ultra-low carbon structure eliminates welding intergranular corrosion and weld cracking caused by long-term coastal salt fog and high-humidity erosion. Molybdenum alloy component provides excellent seawater and chloride corrosion resistance, passing 5000-hour neutral salt spray test. The thickened integral solid plate body improves pressure resistance and structural rigidity, adapting to ship pipeline vibration and wave impact load. Super enhanced passivation treatment ensures long-term anti-rust, anti-corrosion and stable sealing performance in high-salt and high-humidity marine environments.

Core Selling Points

1. Low carbon anti-weld cracking, eliminate marine salt fog welding corrosion sealing failure;

2. Molybdenum enhanced salt spray resistance, professional marine anti-corrosion grade performance;

3. PN25 medium-high pressure resistance, adapt to marine pipeline hydraulic impact heavy load;

4. Thickened solid plate structure, strong anti-vibration and anti-loosening sealing performance;

5. Pass professional marine salt spray test, stable long-term offshore sealing service;

6. Compact solid structure, no loose parts, safe and reliable for ship pipeline sealing;

7. Excellent high-humidity environment oxidation resistance, no rust or scaling leakage.

Full Available Materials: F316L, F316, S32205, S2507, 904L marine grade stainless steel

Applicable Industries: Shipbuilding pipeline end sealing, offshore platform process pipeline plugging, coastal port facility pipeline closure, marine fire protection system sealing, seawater desalination pipeline end cap

Why Choose Us

Our factory has professional marine blind flange production and inspection standards, equipped with special salt spray testing equipment for full-batch inspection. All marine-grade 316L blind flanges strictly control carbon and molybdenum content to meet marine engineering specifications. Provide complete ship inspection certificates and EU PED certification, with 18-month marine heavy-duty exclusive warranty. Long-term supporting global shipyard and offshore engineering projects, providing one-stop marine pipeline end sealing solutions.

Customization Capabilities (8 Items)

1. Marine special salt spray anti-corrosion enhanced customization;

2. Anti-vibration and anti-loosening thickened solid plate structure customization;

3. Complete ship inspection certification and document matching customization;

4. High-humidity environment anti-rust and anti-oxidation coating treatment;

5. Space-saving optimized size customization for narrow ship cabins;

6. Marine anti-corrosion laser marking and identification engraving;

7. Waterproof and moisture-proof special export packaging for marine transportation;

8. Customized third-party marine grade performance inspection report.

FAQ:1:How long is the custom lead time for stainless steel flanges in Wenzhou?

— 8 to 10 working days

2:What is the fastest delivery time?

— 3 working days

3:Do you support non-standard custom flanges?

— Yes, we do.

4:Can you process special sizes?

— Yes. Max processing size: 4000 mm, Min processing size: 30 mm.

5:Do you have stainless steel flanges of standard sizes in stock?

— Yes.

6:Can we customize flanges based on customer drawings or samples?

— Yes.

7:Will material test certificates and inspection reports be provided for the purchased flanges?

— Yes, they will.

8:Is there a quality warranty for the flange products?

— Yes.

9:How to handle quality defects if they occur?

— Product return and exchange available.

10: Why choose 316L blind flange for marine pipeline sealing?

— Low carbon anti-weld cracking + molybdenum anti-salt fog corrosion + PN25 high pressure resistance, which is the most stable sealing solution for harsh marine pipeline end plugging.