Stainless steel flanges have good metal properties and strong corrosion resistance, and are often used in steel structural components, such as stainless steel flanges. Stainless steel flanges are also known as stainless acid resistant steel flanges. Their metal surface is smooth and not easy to oxidize with air, so they are often used in high-pressure water pipes and pressure pipelines that cause corrosion. Stainless steel flanges have excellent performance.
    Firstly, as a metal material, it will react with air in humid environments, thereby changing its original metal properties. However, stainless steel flanges can passivate with oxidants, forming a tough and dense layer of chromium rich oxide protective film Cr2O3 on the surface. Stainless steel flanges effectively prevent further oxidation reactions from occurring. However, other metal pipes, such as galvanized water pipes and copper pipes, have very low passivation ability, which is the key reason why the corrosion resistance of galvanized copper pipes is far inferior to that of stainless steel pipes. Then, the corrosion resistance performance of stainless steel flanges is demonstrated. Stainless steel flanges will not undergo uniform corrosion like carbon steel and do not require protective coatings during use; Stainless steel flanges use stainless steel flange water pipes, which have no restrictions on the chemical composition of water because stainless steel has good corrosion resistance in water with various oxygen content, temperature, pH, and hardness; Stainless steel water pipes can withstand high flow rates, even if the flow rate is greater than 40 meters per second, they still maintain an extremely low corrosion rate, not exceeding 0.003 millimeters per year, making them particularly suitable for supplying water tohighrise buildings. The thermal expansion coefficient of stainless steel flange pipes is similar to that of copper pipes, which is 1.5 times that of ordinary steel pipes. Compared with stainless steel flanges, stainless steel flange fittings have the characteristic of slow thermal expansion and contraction.
    In addition, stainless steel flanges generally undergo chemical reactions as a whole, forming a protective film on their surface, which other metals cannot achieve.