At present, the
stainless steel pipes supplied on the market are mainly composed of galvanized steel pipes, plastic-lined galvanized steel pipes, stainless steel-lined plastic pipes, stainless steel plastic-coated pipes, and all-stainless steel pipes.
Let us analyze the main characteristics of these pipes one by one so that the pipes can be selected correctly and reasonably.
Galvanized steel pipe: cheap, high mechanical strength, but easy to rust, the inner wall of the pipe is easy to scale and breed bacteria, and the service life is short. It is a banned product in the field of water supply. Plastic-lined galvanized steel pipe is an ill-conceived product. It makes the pipeline bulky, increases the manufacturing cost, and fails to eliminate the defects that the connecting thread of the galvanized steel pipe is most likely to be corroded and damaged and has a short service life, so it is a product that is not suitable for popularization.
Stainless steel lined with plastic and outer plastic pipe: it is an ill-considered product. Due to the large difference in the service life of stainless steel and plastic, it is also a product that should not be promoted.
Thick-walled all-stainless steel pipe: Due to its advantages of corrosion resistance and pollution-free, excellent mechanical properties, good destructive resistance, low thermal conductivity, durability, and luxurious appearance, it is the most ideal pipe for use. Because of this, all stainless steel piping systems have been adopted in the pharmaceutical, chemical, and beverage packaging industries very early. The water supply network in some areas of Japan and Germany has all adopted all-stainless steel piping systems. However, the traditional thick-walled stainless steel pipeline system has not been popularized and applied in the fields of municipal water supply and building water supply due to the high consumption of stainless steel materials, high price, and the constraints of economic capacity.
Thin-walled all-stainless steel pipe: This is a new generation of water pipe that China leads the world in. This system abandons the traditional screw thread connection method and uses a homogeneous plug joint to realize the sealed connection of the pipeline, so the stainless steel pipe can be thinned The pipe wall greatly reduces the cost of pipeline laying (similar to copper pipes). According to the actual measurement, the working pressure of the thin-wall all-stainless steel piping system can reach above 2.5Mpa, and its thermal conductivity is low, which is 1/25 of the copper pipe and 1/4 of the iron pipe, and the heat preservation effect is the best among all metal pipes. , and can be used for a long time in the temperature range of -40℃~120℃. Due to its excellent performance in all aspects, the Ministry of Construction has listed it as the preferred water pipe below.
