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: Q: Can 316L SW flange work for high-pressure chemical pipe?
A: No, 316L socket root easy stress crack, 2205 duplex is dedicated high-pressure chemical socket flange.
