GB/T9113 Type12 F304 PN16 RF Socket Weld Flange is hot forged small-bore socket welding flange, the most cost-effective welded fitting for DN15-DN50 small diameter industrial piping. Different from butt weld flange, it adopts integrated recessed socket structure, pipes inserted into flange socket and fixed by outer fillet welding only, no full penetration welding required, greatly lowering on-site welding difficulty. Designed for conventional medium-pressure water, gas, oil circulating pipelines, it balances welding efficiency, sealing stability and long-term pipeline fatigue resistance.
Manufactured from virgin ASTM A182 F304 austenitic stainless steel, zero recycled scrap mixing, 100% spectral tested factory batch inspection. Integrated forging eliminates internal air holes and grain defects, improving socket wall impact resistance. Native chromium passive film provides excellent anti-rust performance for indoor humid, weak acid industrial workshops, service life up to 15 years under normal working conditions. Precision CNC machined inner socket with standard shoulder positioning, controlling pipe insertion depth accurately to avoid uneven welding gap.
Ra3.2 fine turned RF raised face, compatible with PTFE, rubber, asbestos-free universal gaskets, stable sealing for neutral fluid medium. Full body acid pickling passivation enhances surface anti-corrosion, avoiding welding spot rusting after on-site welding. Standard PN16 rated pressure 1.6MPa, suitable for long-term cyclic pipeline operation. Factory triple inspection: socket size tolerance, hydraulic pressure tightness, welding groove flaw detection. DN15-DN50 conventional small bore in stock. Support custom socket depth, laser logo engraving, non-standard bolt hole pitch. 15-month factory warranty, complete MTC material certificate, fumigated neutral export packing.
Core Product Advantages:1.Outer fillet weld only, easy on-site welding;2.Positioning shoulder design, unified welding assembly;3.One-piece forged high fatigue resistance;4.Smooth inner bore low fluid resistance;5.Economical for small bore pipe renovation
Core Spec: Standard: GB/T9113; Pressure: PN16(1.6MPa); Face: RF; Type: Socket Weld; Material: F304 Stainless Steel; Process: Hot Die Forged + CNC Machining; Size: DN15-DN50
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: Socket weld vs butt weld flange difference?
—: SW flange fits DN50 below small pipe, easier welding; BW flange for large bore high pressure heavy duty pipe.
11:How to match the corresponding flange specifications for stainless steel elbows, tees and other pipe fittings?
—The core principle for matching pipe fittings and flanges is consistency in three aspects: pressure class, nominal size series and applicable standards. For instance, if the pipeline adopts ASME butt-weld elbows, they shall be matched with ASME butt-weld flanges of the identical pressure class and standard. Otherwise, mismatched sealing faces and assembly misalignment will occur.
We supply a full range of piping components including flanges, elbows, tees, reducers and caps. All products are manufactured uniformly in accordance with drawings and standards to guarantee assembly accuracy and sealing compatibility, eliminating fitting errors caused by customers sourcing from multiple suppliers.
