2205 Duplex Socket Weld Flange, PN40 High Pressure SW Flange, Acid Alkali Chemical Anti-crack Pipe Flange

   EN1092-1 S32205 2205 Duplex PN40 RF Socket Weld Flange is heavy-duty high-pressure duplex forged socket weld flange, upgraded pressure-corrosion integrated replacement for 316L SW flange, designed for medium-high pressure acid-base chemical small-bore process piping. Core competitive strengths: dual-phase anti-socket stress cracking, PN40 ultra-high pressure bearing, acid&alkali dual corrosion resistance, high weld joint toughness, gap anti-corrosion, cost-effective substitute for 2507 super duplex flange.

   Balanced ferrite-austenite dual-phase metallographic structure solves the core defect of ordinary austenitic stainless SW flange: socket root stress cracking under high pressure + corrosive medium coupling effect. Ultra-thickened reinforced socket wall reaches PN40 4.0MPa ultra-high pressure capacity, adapting chemical workshop pressure fluctuation, corrosive liquid cyclic conveying piping. Professional duplex stabilization heat treatment improves weldability, reducing welding cold crack risk during on-site fillet welding.

   Optimized widened gap buffer design, avoid corrosive medium concentration inside welding gap, lowering crevice corrosion risk. High precision lapped RF sealing face matched modified PTFE chemical gasket, stable sealing for strong acid, alkali, salt chemical medium. Whole body duplex passivation strengthen inner socket anti-corrosion performance. DN25-DN40 chemical high-pressure small bore in stock. Custom deepened socket, anti-corrosion lining, non-standard pressure OEM available. Passed third-party duplex metallographic test, socket burst test. 22-year chemical service life, 20-month heavy duty factory warranty.

Core Product Advantages:1.Dual-phase anti-socket root cracking;2.PN40 ultra-high pressure resistant;3.Acid alkali dual medium corrosion proof;4.Low welding cold crack rate;5.Economic alternative to 2507 duplex SW flange

Core Spec: Standard: EN1092-1; Pressure: PN40(4.0MPa); Face: RF; Type: Socket Weld; Material: S32205 Duplex Steel; Process: Duplex Forging + Phase Stabilization; Size: DN25-DN40

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：Is Shangdian Flange a manufacturer or a trading company?

—Shangdian Flange is a 100% original intelligent manufacturing factory, not a trading company. We operate a large forging workshop in Wenzhou equipped with five-axis machining centers, high-precision CNC vertical lathes, forming presses, an in-house heat treatment production line, as well as complete testing equipment including spectrum analysis and flaw detection. We realize integrated independent production covering forging of blanks, precision machining and finished product inspection. No core processes are outsourced, enabling full independent control over quality and delivery schedules.

11：Qualifications:

—We hold the TS Special Equipment Manufacturing License, ISO triple system certifications, together with multiple export approvals including EU CE-PED, German AD2000 and Customs Union EAC. We can undertake domestic projects for pressure pipelines and pressure vessels, and supply fully compliant certified products for foreign trade and international engineering orders.