Comprehensive performance of stainless steel flange

Stainless steel flanges have good metal properties and strong corrosion resistance. They are often used in steel structural parts, such as stainless steel flanges. Stainless steel flanges also become stainless acid-resistant steel flanges, and their metal surfaces are smooth. , It is not easy to oxidize with air, so it is often used in high-pressure water pipes and corrosive pressure pipes. The excellent performance of stainless steel flanges.

First of all, as a metal material, it will react with the air in a humid environment, thereby changing the original metal performance, but the stainless steel flange can passivate with the oxidant, forming a tough and dense chromium-rich oxide protective film on the surface Cr2O3, stainless steel flange effectively prevents further oxidation reaction. Other metal pipes, such as galvanized water pipes and copper pipes, have little passivation ability. This is the key reason why the corrosion resistance of galvanized pipes is far less than that of stainless steel pipes. Then the corrosion resistance performance of stainless steel flanges, stainless steel flanges will not be uniformly corroded like carbon steel, and no protective coating is required during use; stainless steel flanges use stainless steel flanged water pipes, and there is no restriction on the chemical composition of water, because stainless steel is The water with oxygen content, temperature, PH and hardness has good corrosion resistance; stainless steel water pipes can withstand very high flow rates, even if the flow rate is greater than 40 m/s, it still maintains a very low corrosion rate, not exceeding 0.003 mm/ It is especially suitable for high-rise water supply. The coefficient of thermal expansion 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 pipe fittings have the characteristics of slow thermal expansion and slow contraction.

In addition, the chemical reaction of stainless steel flanges is generally integral, and a protective film will be formed on its surface, which is impossible for other metals.