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What is the use of stainless steel seamless pipe in seawater desalination project?

What is the use of stainless steel seamless pipe in seawater desalination project?

Time:2022-03-15 Source:China Wuxi JiaNuo Special Steel Co.

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Stainless steel seamless tubes are also widely used in almost all industries. Zhejiang stainless steel pipe manufacturer one of them is called seawater desalination project. Stainless steel seamless pipe is also used in it. Water is something indispensable in our daily life. However, seawater cannot be consumed directly and can only be used after treatment. Let’s talk about the application of stainless steel seamless pipe in seawater desalination project.

Stainless steel seamless tubes used in desalination plants to treat hot concentrated seawater are very notable for their pitting in chloride containing environments. Although the lack of oxygen in hot seawater reduces the tendency to pitting and stainless steel seamless tubes are the traditional material for evaporators, most modern multi-stage flash desalination plants do not use stainless steel seamless tubes and most desalination equipment manufacturers are beginning to use duplex stainless steel as an alternative material.

There are two main methods of desalination using stainless steel seamless tubes: thermal and membrane methods. The thermal method includes multi-stage flash distillation and multi-effect distillation. Membrane methods include repeated osmosis and electrodialysis/repeated electrodialysis. Stainless steel is used in various desalination projects because of its corrosion resistance.

All desalination methods are the same process. The seawater introduced by Wenzhou stainless steel pipe is divided into two parts, one for treatment and the other for concentration. As the salinity of the concentrated seawater decreases, the salinity of the treated seawater is much higher than that of the original seawater. The equipment and materials used in the desalination process should be corrosion resistant. Material selection and design principles depend on the environment in which the material will be used. Stainless steel is an ideal material because of its corrosion resistance and durability.

There are more than 200 types of stainless steel, only some of which can be used in desalination projects. The stainless steels used in desalination projects require good corrosion resistance in a variety of complex environments. Austenitic stainless steels 316L and 317 are the primary materials used for desalination equipment. 316L is able to withstand corrosion in the marine environment, but pitting and crevice corrosion can occur with prolonged immersion in seawater.

The above is a description of the application of stainless steel seamless pipes in seawater desalination projects.