Comprehensive performance of stainless steel flanges

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 surfaces are smooth and not easily oxidized by air, so they are often used in high-pressure water pipes and corrosive pressure pipelines. 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 undergo passivation with oxidants, forming a tough and dense chromium rich oxide protective film Cr2O3 on the surface. Stainless steel flanges effectively prevent further oxidation reactions from occurring. And other metal pipes, such as galvanized water pipes and copper pipes, have very little 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 no protective coating is required during use; Stainless steel flanges are used for water pipes, and there are no restrictions on the chemical composition of water because stainless steel has good corrosion resistance in water with various oxygen contents, temperatures, 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 high-rise water supply. 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.