Brief introduction of comprehensive performance of stainless steel flange

Stainless steel flange has good metal performance and strong corrosion resistance. It is often used in steel structural parts, such as stainless steel flange. Stainless steel flange has also become stainless acid resistant steel flange. Its metal surface is smooth, and it is not easy to oxidize with air, so it is often used in high-pressure water pipes and corrosive pressure pipes. Here is the stainless steel method It has excellent properties.

First of all, as a metal material, it will react with air in humid environment, thus changing the original metal properties. However, stainless steel flange can passivate with oxidant, forming a tough and dense chromium rich oxide protective film Cr2O3 on the surface, which effectively prevents the further oxidation reaction. The passivation ability of other metal pipes, such as galvanized water pipe and copper pipe, is very small, which is the key reason why the corrosion resistance of galvanized copper pipe is far less than that of stainless steel pipe.

Then the corrosion resistance performance of stainless steel flange, stainless steel flange will not be as uniform corrosion as carbon steel, use without protective coating; stainless steel flange water pipe, there is no limit to the chemical composition of water, because stainless steel in a variety of oxygen content, temperature, pH and hardness of water have good corrosion resistance; stainless steel water pipe can withstand high flow rate Even if the flow rate is more than 40 m / s, the corrosion rate is still very low, not more than 0.003 mm / year, which is especially suitable for high-rise water supply. The coefficient of thermal expansion of stainless steel flange pipe is similar to that of copper pipe, which is 1.5 times of that of ordinary steel pipe.

In addition, the chemical reaction of stainless steel flange is integral, which will form a protective film on its surface, which other metals can't do.

Related article recommendation: application scope of stainless steel non-standard flange