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Comprehensive properties of stainless steel flanges

Comprehensive properties of stainless steel flanges
May 15, 2022

Stainless steel flanges have good metal properties and strong corrosion resistance, and are often used in steel structural parts, such as stainless steel flanges, stainless steel flanges have also become stainless acid-resistant steel flanges, its metal surface is smooth, not easy to oxidize with air, so they are often used in high pressure water pipes and corrosion pressure pipes, stainless steel flanges excellent performance.

First of all, as a metal material will react with air in a humid environment, thereby changing the original metal properties, but stainless steel flanges can passivate with oxidants, forming a tough and dense chromium rich oxide protective film Cr2O3 on the surface, stainless steel flanges effectively prevent further oxidation reactions. The passivation capacity of other metal pipes, such as galvanized water pipes and copper pipes is very small, which is the key reason why the corrosion resistance of copper pipes of galvanized pipes is far less than that of stainless steel pipes. Then the corrosion resistance of stainless steel flange performance, stainless steel flange will not be as uniform corrosion as carbon steel, no protective coating is required when used; Stainless steel flange using stainless steel flange water pipe, there is no limit to the chemical composition of water, because stainless steel in various oxygen content, temperature, PH and hardness of water have good corrosion resistance; Stainless steel water pipes can withstand very high flow rates, even if the flow rate is greater than 40 m/s, still maintain a very low corrosion rate, not more than 0.003 mm/year, especially suitable for high-rise water supply. The thermal expansion coefficient of stainless steel flange pipe is similar to that of copper pipe, which is 1.5 times that of ordinary steel pipe. Compared with stainless steel flange pipe fittings, stainless steel flange fittings have the characteristics of thermal expansion and slow contraction.

In addition, the chemical reaction of stainless steel flange is generally integral, and a protective film will be formed on its surface, which is not possible with other metals.


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