304L Low Carbon Stainless Steel Anti-Welding Corrosion Process Pipeline Fitting

   GB/T9117 F304L PN25 RF Socket Weld Flange is a low-carbon upgraded version of conventional 304 SW flange, with ultra-low carbon content below 0.03%, which fundamentally suppresses carbide precipitation during welding and eliminates weld heat-affected zone intergranular corrosion. With a PN25 (2.5MPa) medium-high pressure rating, it solves the problem of insufficient pressure resistance and easy welding corrosion of ordinary 304 flanges, and is suitable for long-term continuous operation of factory process water and medium-pressure gas pipelines.

  Adopting low-carbon austenitic stainless steel for integral forging, the product has more stable welding performance and no brittle cracking after long-term service. The optimized deepened socket structure increases pipe embedding depth, improves connection firmness, and enhances pipeline vibration resistance. After super enhanced pickling and passivation, the surface anti-rust and anti-oxidation performance is greatly improved, effectively resisting industrial atmospheric corrosion and welding residual stress corrosion.

Core Selling Points

1. Ultra-low carbon design, completely avoid welding intergranular corrosion and weld rusting failure;

2. PN25 medium-high pressure bearing, thickened flange body resists pressure surge impact;

3. Deepened socket design, tighter pipe fitting, stronger anti-vibration performance;

4. Enhanced passivation treatment, 40% higher anti-corrosion performance than ordinary 304;

5. Low welding stress, no pipeline deformation after long-term cyclic operation;

6. Ideal for continuous production industrial pipeline long-life matching.

Full Available Materials: F304L, F304, F316L, F316, F321, S32205, S2507, 904L

Applicable Industries: Continuous production workshops, process water piping, medium-pressure gas transmission, environmental protection equipment pipelines, industrial auxiliary fluid systems

Why Choose Us

Our factory specializes in low-carbon stainless steel flange forging, with independent welding corrosion resistance testing process. All F304L products strictly control carbon content through spectral inspection to ensure material compliance. CNC precision deep socket processing ensures accurate assembly gap. Equipped with complete MTC material certificates and export qualification documents, providing long-term industrial warranty service. Support small-batch trial production and large-scale project customized production.

Customization Capabilities (8 Items)

1. Low-carbon material strict customization and carbon content traceability inspection;

2. Deepened socket and reinforced welding groove customization;

3. Multi-spec pressure grade upgrade PN16/PN25/PN40;

4. High-corrosion resistant surface passivation enhancement;

5. Laser marking and customized anti-counterfeiting engraving;

6. Non-standard special size one-to-one drawing processing;

7. Dust-free polishing and sanitary surface treatment;

8. Customized third-party welding quality inspection report.

FAQ:

1:Who Are We?

We are a comprehensive industrial and trading supplier integrating R&D, production, sales and import & export services, specializing in stainless steel valves and flanges.

2:How Do We Guarantee Quality?

All products are manufactured in compliance with international and domestic standards including ASME, DIN and GB, and undergo rigorous material composition testing, dimensional inspection, as well as hydrostatic and air pressure testing.

3:Are You a Trading Company or Manufacturer?

We are a professional manufacturer.

4:What Services Can We Offer?

We provide flexible OEM & ODM customization services. We can fabricate products of various specifications, pressure classes and connection types in accordance with customers’ drawings, project requirements or special working conditions.

5:Why Choose Us Over Other Suppliers?

We have built a mature global supply chain system featuring consistent stable quality, competitive direct factory prices, fast lead times and full-spectrum import and export services.

6: When to choose 304L SW flange instead of 304?

A: For pipelines requiring long-term continuous welding use and high anti-corrosion requirements, 304L effectively avoids weld corrosion and extends service life.