Duplex steel seamless pipes are highly popular in various industrial applications due to their superior strength, excellent corrosion resistance, and exceptional durability. Duplex steel is a type of stainless steel that is composed of equal parts of austenitic and ferritic stainless steel, which gives it a unique combination of properties that make it suitable for use in highly corrosive, high-pressure environments.

HT PIPE Supply Duplex Stainless Steel seamless Pipes in Specification ASME SA / ASTM A789, A790, A928 and Grades UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF 2205, SAF 2507 etc, UNS S31803 Pipe, duplex 2205 seamless pipe, 254smo seamless pipe, super duplex 2507 pipe manufacturer, SS 904L seamless Pipes, duplex 2205 seamless tube exporter in China.

Here are the different grades of duplex steel seamless pipes, along with their chemical composition and properties:

1. Duplex 2205: This is the most commonly used duplex steel grade in the market. It is composed of 22% chromium, 5% nickel, 3% molybdenum, and 0.15% nitrogen. It has a high resistance to corrosion, excellent strength, and good weldability.

   
   

2. Super duplex 2507: This is a super duplex steel grade composed of 25% chromium, 7% nickel, 4% molybdenum, and 0.27% nitrogen. It offers excellent resistance to corrosion and high mechanical strength, making it suitable for use in harsh environments such as oil and gas production facilities.

   
   

3. Stainless steel 904L: This grade is known for its high resistance to corrosion, especially in moderate to high concentrations of sulfuric and hydrochloric acid. It is composed of 25% chromium, 20% nickel, and 4.5% molybdenum.

   
   

4. Stainless steel 254SMO: This is a high-performance duplex steel grade that is composed of 20% chromium, 18% nickel, and 6% molybdenum. It offers excellent corrosion resistance, high strength, and exceptional weldability.

The specification of duplex steel seamless pipes

The properties of duplex steel seamless pipes

- High strength and durability

- Excellent resistance to pitting, crevice, and general corrosion

- Good resistance to high-pressure and high-temperature environments

- Low thermal expansion and high thermal conductivity

- Exceptional weldability and formability

Duplex steel seamless pipes are used in various industries, including:

- Oil and gas exploration and production

- Chemical and petrochemical processing

- Water treatment and desalination

- Power generation

- Marine and offshore engineering

- Pulp and paper production