304 thin-walled stainless steel pipe fittings

Stainless steel fittings are a recognized health material that can be implanted into the human body. Stainless steel is visible in almost all areas of application involving human health.

It has been widely used. Stainless steel water pipe is an environmentally friendly material that meets health requirements and can be recycled 100%, saving water resources, reducing transportation costs, reducing heat loss, and avoiding sanitary ware pollution. The following details:

1, life

Stainless steel tubing has the longest life. From the analysis of the use of stainless steel abroad, the service life of stainless steel water pipes can reach 100 years, at least 70 years, as long as the life of buildings.

2, corrosion resistance One of the most prominent advantages of stainless steel pipe is its excellent corrosion resistance, which is the best among various pipes. Because stainless steel can passivate with the oxidant, a tough and dense chromium-rich oxide protective film Dr2O3 is formed on the surface, which effectively prevents the 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 copper pipes of galvanized pipes is far less than that of stainless steel pipes.

Stainless steel does not undergo uniform corrosion like carbon steel, no need to protect the coating when used; stainless steel water pipes have no restrictions on the chemical composition of water, because stainless steel is very good in water with various oxygen content, temperature, pH and hardness. Corrosion resistance; stainless steel water pipes can withstand high flow rates, even at flow rates greater than 40 m / s, still maintain a very low corrosion rate, no more than 0.003 mm / year, especially suitable for high-rise water supply.

Stainless steel generally does not undergo local corrosion. 304 stainless steel can withstand up to 200 ppm of chloride and 316 stainless steel can withstand up to 1000 ppm of chloride. This conclusion is based on exposure data and has been proven by experience. The coefficient of thermal expansion of stainless steel tube is similar to that of copper tube, which is 1.5 times that of ordinary steel tube. Compared with the stainless steel tube, it has the characteristics of slow expansion and contraction.

3, heat and insulation

The thermal conductivity of stainless steel pipes is 1/25 of that of copper pipes, which is 1/4 of ordinary steel pipes, and is especially suitable for hot water transportation. The most commonly used stainless steels in the water industry are 304 and 316 stainless steels, which are suitable for most water treatment and transport conditions.

4, strength

The tensile strength of 304 stainless steel pipe is twice that of steel pipe and 8~10 times that of plastic pipe. The strength of the material determines whether the water pipe is strong and crash resistant, safe and reliable. Safety and reliability are the most important requirements for building water supply. In the case of impact by external force, the possibility of leakage of stainless steel water pipes is extremely small. The working pressure of high-rise water supply system is generally greater than 0.6Mpa; the pressure on pipes is higher. Due to its excellent mechanical properties, thin-walled stainless steel pipes can withstand high water supply pressures up to 10Mpa, which is especially suitable for high-rise water supply.