Duplex Tube Fittings at Instinox

Duplex is a grade that was developed over 70 years ago to be used in the sulfite paper industry. This grade came to be known as super duplex because of its mixed microstructure of about equal parts of ferrite and austenite. Our Duplex tube fittings are manufactured to especially fight extreme corrosion problems which occur due to exposition to chloride bearing cooling waters and other aggressive chemical process fluids. Duplex tube fittings at Instinox have an extremely high mechanical strength which is one of the reasons that has made it ideal for use in onshore and offshore environments in oil and gas applications. These tube fittings not only have a high resistance to fitting but also have an outstanding resistance to stress corrosion cracking at moderate temperatures. All Super duplex tube fittings manufactured by us also have an extremely high tensile strength compared to that of conventional austenitic stainless steels.