Stainless steel flange is also called stainless steel flange or flange. It’s a part of the tube that connects with the tube. Connect to pipe end. There are holes on the stainless steel flange, which can be threaded with bolts to make the two stainless steel flanges tightly connected. The stainless steel flange is sealed with gasket. Stainless steel flange is a kind of disk-shaped part, which is common in pipeline engineering. The flange is used in pairs. In pipeline engineering, flange is mainly used for connection of pipeline. For the pipes to be connected, a flange plate shall be installed for each kind of installation. For the low-pressure pipes, the threaded flange can be used, and for the pressure above 4kg, the welding flange can be used.
The corrosion resistance of stainless steel flange depends on chromium, but because chromium is one of the components of steel, the protection methods are different. The atmospheric corrosion resistance of steel increases significantly when the chromium content is over 11.7%, but it is not obvious when the chromium content is higher. The reason is that when the steel is alloyed with chromium, the type of surface oxide is changed to the surface oxide similar to that formed on pure chromium metal.
This tightly adherent chromium rich oxide protects the surface from further oxidation. This kind of oxide layer is very thin, through which we can see the natural luster of the steel surface, so that stainless steel has a unique surface. Moreover, if the surface layer is damaged, the exposed steel surface will react with the atmosphere for self repair, and the oxide “passivation film” will be formed again to continue to play a protective role. Therefore, all stainless steel elements have a common characteristic, that is, the chromium content is more than 10.5%.
The stainless steel flange connection is easy to use and can bear large pressure. In industrial pipeline, stainless steel flange connection is widely used. In the home, the diameter of the pipe is small, and it is low pressure, and the stainless steel flange connection can not be seen. If in a boiler room or production site, there are stainless steel flanged pipes and equipment everywhere.
