At present, most of the water pipes are concealed and pipe wells. If the material selection is wrong, it is likely to cause huge losses. The common water supply materials include stainless steel pipes, copper pipes, galvanized pipes, composite pipes and plastic pipes. Next, we will compare these materials to see which material is the most suitable.
The most used in stainless steel pipe is 304 or 316 stainless steel, which can meet most of the water treatment and transportation requirements. The tensile strength of the 304 stainless steel pipe is 2 times that of the ordinary steel pipe, about 4 times of the copper pipe, and more than the 8-10 times of the plastic pipe. As the strength of the material determines whether the water pipe is firm and reliable, it is also the most important requirement for the water supply of the building. And under the external force impact, the stainless steel pipe will not leak, and the leakage rate of copper pipe and plastic pipe is higher, and it will be easily damaged by construction or two time decoration.
Thermal expansion and thermal expansion
The thermal expansion coefficient of the stainless steel pipe is about the same as that of the copper pipe, which is 1.5 times that of the ordinary steel pipe, and the heat expansion and cold shrinkage of the stainless steel pipe is still relatively slow. The expansion coefficient of the plastic pipe is too large, which is fatal and is not suitable to be used as a heat pipe. Under the condition of environmental temperature change, the plastic pipe can also easily produce the hidden danger of leakage and so on, especially in the concealed engineering. The composite pipe has two different kinds of material expansion coefficient, which causes the joint to crack easily, which makes the pipe easier to burst. The thermal conductivity of stainless steel pipe is 1/25 of copper pipe, 1/4 of ordinary steel pipe, very suitable for hot water transportation, and the thermal insulation performance is much better than copper pipe.
One of the best advantages of stainless steel pipes is the excellent corrosion resistance, which is the best of the five pipes. Because the stainless steel will produce passivation and oxidant to form a layer of dense tenacity the chromium oxide protective film on the surface of Cr2O3, can effectively prevent further oxidation reaction. Other metal pipes are far from stainless steel in corrosion resistance.
Health and environmental protection performance
The sanitary properties of stainless steel pipes are excellent, which can ensure that the water quality does not have all kinds of strange problems, nor does it smell or foul. It does not precipitate harmful substances, ensure the purity of the water, and is healthy and harmless to the human body. Stainless steel pipe not only in the food industry including beverages, dairy products, brewing, pharmaceutical industry, and other industries and long-term use of tableware cookware has become standard timber in these industries, but also a large number of materials used in the safety and cleanliness requirements of high medical body implants such as various stents, artificial joints and steel nail body, and become a standard material requirements for cleanliness of clean room of semiconductor industry’s extreme. Therefore, with the continuous improvement of water quality and the strict regulation of regulations on hazardous substances in water pipes, stainless steel pipes become the best choice for transporting high-quality water.
Although the price of stainless steel pipe is higher than that of other pipes, it is very limited, but the material performance is much superior, and it also greatly improves the grade of the pipe. In fact, the selection of stainless steel water pipes is much more than initial investment, but the life cycle cost is very low, which is the absolute advantage of stainless steel compared with other materials in terms of economy.
Source: China Stainless Steel Pipelines Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)