About The Applications Of Duplex 2205 Pipe

Duplex pipe is widely used in various fields due to its unique advantages. It is summarized as follows:

Pulp and paper industry: The pulp and paper industry is the first processing industry to duplex steel. The use of dual-phase steel instead of 304 and 316 austenitic stainless steel sulphuric acid and sulphuric acid cooking pots improves the corrosion resistance and strength of the steamer, while reducing the wall thickness and reducing the total weight of the steamer. This is also an important market for the inventor of 2205 duplex steel, Outokumpu, Sweden.

Chemical processing industry: The chemical processing industry has a wide range of applications and complicated working conditions. Storage tanks for the preservation of industrial wet process phosphoric acid are usually made of 316L or 317L type austenitic stainless steel, but the walls are thick. With duplex steel 2205, the strength is almost double that of 316L and 317L, and the wall thickness can be reduced, thereby reducing the importance and cost of the tank. At the same time, in the industrial sulfuric acid environment, especially in the presence of chloride ions, 2205 has better local corrosion resistance than ordinary austenitic stainless steel.

Refining industry: The refining industry is one of the fields that use more duplex steels. It is mainly used in atmospheric and vacuum distillation, catalytic cracking hydrodesulfurization and other devices, and is used at home and abroad. In addition, duplex steels are increasingly used in the production of sour gas and oil, and are mainly used as pipe systems for pipe lining, onshore and offshore, and heat exchangers.

Petrochemical industry: The corrosive environment of petrochemical and chemical industries is characterized by high reaction temperature, and the medium often contains high or medium concentration of chloride, which is easy to induce stress corrosion cracking of stainless steel.

Food and Beverage Industry: Food and beverage industry production is typically processed in hot solutions containing chloride ions. Duplex steels have unique advantages in stress corrosion cracking.

Transportation: Due to the high strength and excellent corrosion resistance of duplex steel, it has great advantages when used in the production of chemical tankers. It reduces the weight of the ship and reduces the fuel consumption. In this respect, the most used is 2205 duplex steel. At the same time, it can meet the corrosion resistance of the materials required for the cargo.

Wall building industry: In the coastal areas, the air is filled with the sea atmosphere evaporated from the sea, where the chloride ion concentration is much higher than the inland air, so the seawater resistant material is needed. The corrosion resistance of duplex steels has this advantage, and its high strength also reduces weight. At present, many offshore oil platforms use duplex steel to make explosion-proof walls.

In addition, duplex steel has also been successfully used in water treatment heat exchangers, hot water pipes, and water heaters.