Grafton Pipe Fittings is a trusted name in the industrial piping and fitting industry, offering an extensive range of high-performance products, including top-grade Duplex Stainless Steel Flanges. Manufactured to meet the stringent standards of international specifications, our Duplex flanges are designed to deliver unmatched strength, durability, and corrosion resistance in demanding environments. These flanges are widely used in industries such as petrochemical, power generation, oil & gas, and marine engineering.

Our Duplex Stainless Steel Flanges are manufactured using superior quality Duplex alloy with UNS S31803 and ASTM A182 F51 grade. Known for their exceptional mechanical strength and excellent resistance to chloride stress corrosion cracking, these flanges provide a balanced microstructure of austenite and ferrite. The unique combination of these two phases ensures superior strength compared to standard austenitic stainless steels while maintaining excellent weldability and ductility.

The universal standard name for this material is Duplex 2205, and it offers significant advantages over conventional stainless steels such as 304 or 316. Duplex 2205 (UNS S31803 / ASTM A182 F51) provides nearly double the yield strength, better fatigue strength, and superior performance in harsh and corrosive environments. Our Duplex Steel Flanges are ideal for high-pressure piping systems, heat exchangers, offshore platforms, chemical processing units, and desalination plants.

The Duplex material's high chromium and molybdenum content give it outstanding resistance to pitting, crevice corrosion, and general corrosion. This makes our ASTM A182 F51 Flanges a cost-effective and reliable choice for aggressive media handling applications. With enhanced resistance to stress corrosion cracking and fatigue, these flanges extend the life of piping systems and reduce maintenance costs.

Specification Of Duplex Stainless Steel Flanges

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