Stainless steel material is a recognized healthy material that can be implanted into the human body and is used in almost all fields involving human health. It has been widely used. The Stainless steel water pipe is an environmentally friendly material that meets health requirements, can be 100% recycled, saves water resources, reduces transportation costs, reduces heat loss, and avoids sanitary ware pollution. The details are as follows:
Stainless steel tubing has the longest service life. From the analysis of the use of stainless steel abroad, the service life of stainless steel water pipes can reach 100 years, or at least 70 years, which is 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 all kinds of pipes. Because stainless steel can passivate with oxidant, a tough and dense chromium-rich oxide protective film Dr2O3 is formed on the surface, which can effectively prevent the further oxidation reaction.
And other metal pipes, such as galvanized water pipes and copper pipes, have little passivation ability, which 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 corrode uniformly like carbon steel, and no protective coating is required for use; with stainless steel water pipes, there is no limit to the chemical composition of water, because stainless steel has good performance in water of various oxygen content, temperature, PH and hardness Corrosion resistance; stainless steel water pipes can withstand high flow rates, even if the flow rate is greater than 40 m/s, it still maintains a very low corrosion rate, no more than 0.003 mm/year, especially suitable for high-rise water supply.
Stainless steel generally does not suffer from localized corrosion. The chloride content that 304 stainless steel can withstand is up to 200ppm, and the chloride content that 202 stainless steel can withstand is up to 1000ppm. This conclusion is based on exposure experimental data and has been confirmed by experience. The thermal expansion coefficient of stainless steel pipe is similar to that of copper pipe, which is 1.5 times that of ordinary steel pipe. Compared with stainless steel pipe, it has the characteristics of slow thermal expansion and cold contraction.
3. Heat resistance and heat preservation
The thermal conductivity of stainless steel pipe is 1/25 of copper pipe and 1/4 of ordinary steel pipe, especially suitable for hot water transportation. The most commonly used stainless steels in the water industry are 202 and 304 stainless steels, which can meet the vast majority of water treatment and delivery conditions.
The tensile strength of 304 stainless steel pipe is 2 times that of steel pipe and 8-10 times that of plastic pipe. The strength of the material determines whether the water pipe is strong, crash-resistant, safe, and reliable. Safety and reliability are the most important requirements for building water supply. Under the circumstance of being hit by an external force, the possibility of leakage of the stainless steel water pipe is extremely small. The working pressure of a high-rise water supply system is generally greater than 0.6Mpa, which requires higher pressure on pipes.