Applications of Super Duplex Steel Pipes

Stainless steel pipes are noteworthy for their corrosion resistance, strength, and durability. These properties make them a top choice among materials for pipes. Super duplex steel pipes available at Doshi Impex India, a leading stainless steel pipe fitting manufacturer and supplier are known for their high quality and find applications in multiple industries like oil and gas extraction, chemical processing, and more. If you want to explore the applications of these high-strength pipes, continue reading further.

Super Duplex Steel Pipe

These pipes are made of super duplex steel, an alloy of iron, nickel, chromium, and molybdenum. It has a combination of austenitic and ferritic steel and provides excellent cracking and stress corrosion cracking resistance. It also has enhanced mechanical properties compared to other steel types. Pipes made of super duplex steel also provide high pitting resistance and tensile strength. Moreover, these pipes are also available at affordable pricing at reputed stainless steel pipe suppliers in India, making them perfect for applications involving oil and gas extraction (onshore and offshore).

Production

Super duplex tube pipes and tube fittings utilize manufacturing processes like Seamless and Electric Resistance Welding (ERW). These pipes mainly use an extrusion process (single piece), ensuring dimensional accuracy, consistent properties, and surface finish.

The super duplex steel pipes are available in multiple shapes like square, round, rectangle, and more. These pipes have ends like plain, threaded, bevel, etc. Some manufacturing methods for these pipes include extrusion, tube milling, piercing, and heat treatment, followed by mechanical testing.

Benefits

• High Strength: Pipes made of super duplex steel have double the strength of ferritic or austenitic steel pipes.
• Toughness and ductility: These pipes are tougher and ductile than ferritic steel grade, however, they are not tougher than austenitic steel grades.
• Heat resistance: Super duplex steel pipes have higher heat resistance than austenitic steel. They also have high ductility at low temperatures.
• Corrosion Resistance: Like stainless steel, the corrosion resistance of super duplex steel is known through its combination of chromium, nitrogen, and molybdenum content. This material has high-stress corrosion cracking resistance. Its ultimate corrosion resistance makes it desirable in applications with sulfide and chloride (SCC) exposure. SCC is caused by high temperature, corrosive surroundings, and tensile tension. Hence, if your project deals with these three factors, it is advisable to utilize super duplex steel pipes.
• Cost: Super duplex steel pipes have lower molybdenum and nickel content than austenitic steel. It reduces the alloying element requirement, making super duplex steel affordable. This alloy also has high yield strength, which reduces its thickness, ultimately reducing the overall weight.
• Weldability: Although super duplex steel does not have good weldability like its austenitic counterparts, it has high weldability and can be joined with basic welding methods.

Applications

Super duplex pipes have high corrosion resistance in chloride-exposed environments. These pipes find applications extensively in heat exchangers in oil refineries, pressure vessels, seawater applications, cargo tanks, desalination plants, petrochemical plants, and refineries.

Following are some of the specific applications of super duplex pipes:

• Desalination Equipment
• Marine Applications
• Chemical process pressure vessels
• Heat exchanger piping
• Flue Gas Scrubbing Equipment
• Pulp and Paper Processing Equipment
• Oil and gas industry equipment
• Offshore Oil production

Final thoughts

Super duplex steel pipes and tubes available at stainless steel pipes and tube manufacturers in India, Doshi Impex India are suitable for extensive applications dealing with high-pressure gases and chemicals. They are also essential in hydraulic pipe fittings for reliability, safety, and efficiency. If you are looking for a reputed S.S. pipe supplier and stainless steel pipe fittings suppliers in India, connect with Doshi Impex India today!