Duplex Steel Flanges

We are leading supplier of S31803 / S32205 / 2205 Duplex Stainless Steel Flanges

We have a strong supply of  DUPLEX STAINLESS STEEL S31803 / S32205 / 2205 FLANGES, which has good sulfide stress corrosion resistance, high strength, and excellent impact toughness. These Duplex Steel S31803 Slip On Flanges is chemically balanced to yield a micro structure of approximately 50 / 50 fer-rite to austenite ratio. Our Duplex Steel S32205 Blind Raised Flanges leads to reduced plate thicknesses being used in fabrications reducing the weight which is of particular significance in items such as pressure vessels, storage tanks, and structural applications such as bridges. These Duplex 2205 Blind Spectacle Flanges is used for a variety of industries including oil & gas, petrochemical, marine and pulp & page factories. Common Applications of our Duplex Steel S31803 Lap Joint Flanges are chemical processing, transport and storage – tanks, piping, pressure vessels, and heat ex changers. These Duplex Steel S32205 Ring Type Joint Flanges also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than authenticate. Our Duplex 2205 Socket Weld Flanges has high resistance to pitting and crevice corrosion, excellent in most caustic environments, and good weld-ability. Specifications oxidation resistance of these Duplex Steel S31803 Weld Neck Flanges is good at high temperature, though it is prone to embitterment when exposed to temperatures above 300 Degree C and is prone to embrittlement at 475 Degree C when exposed for 2 hours only.

S31803 / S32205 Duplex Specification


DIMENSIONS: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

SIZE: 1/2” (15 NB) to 48” (1200NB)

CLASS / PRESSURE: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. FLANGE FACE

TYPE: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ), Weldneck, Slip On, Blind, Threaded

GRADE: UNS S31803 / S32205, DIN (1.4462)