Duplex steel buttweld fittings are high-performance pipe fittings made from duplex stainless steel grades such as UNS S31803 (Duplex 2205) and UNS S32750/S32760 (Super Duplex). These fittings feature a dual-phase microstructure of austenite and ferrite, offering a unique combination of high mechanical strength and excellent corrosion resistance, particularly against chloride-induced stress corrosion cracking, pitting, and crevice corrosion.
Available in forms like elbows, tees, reducers, caps, and stub ends, duplex buttweld fittings are manufactured to standards such as ASME B16.9, ASTM A815, and MSS SP-43. They are commonly used in offshore oil & gas platforms, chemical processing units, desalination plants, and power generation systems, where piping systems are subjected to high pressure, aggressive media, and harsh environmental conditions.
