F304 PN16 RF Socket Weld Flange | GB Standard Small Bore Industrial Water & Air Pipeline SW Flange

   GB/T9117 F304 PN16 RF Socket Weld (SW) Flange is a professional forged small-bore pipeline connecting fitting, specially designed for DN15-DN100 small-diameter industrial pipelines. Different from slip-on and threaded flanges, the unique socket insertion structure allows pipes to be deeply embedded in the flange socket, fixed by outer fillet welding, forming high-strength, high-tightness pipeline connections. This product is widely used in medium-pressure industrial water, factory compressed air and general utility pipeline systems, with stable performance under 1.6MPa long-term cyclic working conditions.

   Manufactured from virgin ASTM A182 F304 austenitic stainless steel, the whole piece is hot forged with dense internal metallographic structure, no pores or trachoma defects. Precision CNC integrated machining ensures standard socket depth, reasonable assembly gap, effective release of thermal expansion stress, and no pipeline deformation during high and low temperature alternation. The RF raised sealing surface is finely polished with smooth finish, matching various conventional gaskets to achieve zero leakage of neutral media.

Core Selling Points

1. Professional socket weld structure, higher connection strength than threaded flange, better sealing stability than slip-on flange;

2. Integral hot forging molding, high overall rigidity, not easy to deform under medium pressure impact;

3. Reserved thermal expansion gap, effectively avoiding pipeline cracking caused by temperature difference;

4. Single-side outer ring welding, simple construction, low welding defect rate and high project pass rate; 5. F304 raw material with excellent atmospheric corrosion resistance, suitable for indoor and outdoor general industrial environments;

6. Full small-bore size in stock, fast delivery for conventional industrial pipeline renovation projects.

Full Available Materials: F304, F304L, F316, F316L, F321, S32205, 904L, F347Wait

Applicable Industries: Factory circulating water systems, workshop compressed air pipelines, general industrial fluid piping, municipal auxiliary pipelines, HVAC ventilation and water supply systems

Why Choose Us

We are a 16-year professional stainless steel flange forging factory, focusing on SW flange precision manufacturing. Equipped with independent PMI spectral testing laboratory, each batch of products undergoes full material inspection to eliminate recycled materials. Full CNC finishing production line ensures strict dimensional tolerance and smooth sealing surface. Complete ISO9001 quality system and export certification, support third-party SGS/BV/TUV inspection. Flexible MOQ, support sample trial order and large-scale bulk engineering orders.

Customization Capabilities (8 Items)

1. Non-standard socket depth, inner hole diameter and hub height customization;

2. Multi-type sealing surface customization: RF/FF/MFM/TG;

3. Surface treatment: pickling passivation, mirror electrolytic polishing, anti-rust oil coating;

4. Pressure grade upgrade and non-standard pressure customization;

5. Laser engraving logo, standard mark and project number;

6. Thickeed wall reinforcement for special working conditions;

7. Custom export fumigation packaging and pallet packaging;

8. Custom pre-shipment third-party full inspection service.

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: What is the advantage of SW flange over ordinary welded flange?

A: Socket insertion positioning is accurate, welding workload is small, thermal deformation is low, and it is the best choice for small-bore medium-pressure precise pipelines.