Sulfuric acid is very corrosive, so if the transportation medium of the chemical pipeline is sulfuric acid, it is necessary to scientifically select the 20Cr seamless steel pipe. In general, for concentrated sulfuric acid between 95% and 98%, the temperature of the 20Cr seamless steel pipe is appropriately controlled at about 20 degrees. The pressure in actual operation is best controlled at about 0.2 Pa, and the value of the corrosion margin is 1.5. , Choose 20Cr seamless steel pipe, the pressure of 20 grams of material should be about 1.6 Pa, and the temperature should be controlled at about 200 degrees.
In the process of transporting sulfuric acid, the corrosion resistance of 20Cr seamless steel pipe depends on the ferrous sulfate protective film. In order to effectively protect this protective film from damage, the flow rate of sulfuric acid in the pipeline must be strictly controlled.
If the temperature in the 20Cr seamless steel pipe changes during the transportation of the same kind of sulfuric acid, stainless steel pipes can be used for control. If the operating temperature is around 29 degrees, the operating pressure is below 2 Pa, and the corrosion margin of sulfuric acid reaches 3, 316L stainless steel pipes can be used for the pipes.
