Advantages: moderate price, stable performance, heat insulation, corrosion resistance, smooth inner wall without scaling, safe and reliable pipeline system, impermeability and service life of 50 years.
2.UPVC pipe: actually, it is a plastic pipe, and the interface is generally glued. The frost resistance and heat resistance of UPVC pipe are not good. Therefore, hot and cold water pipes are rarely used, and PVC pipes are suitable for electric conduits and sewage pipes.
Scientific and technological circles have found that phthalein, a chemical additive that can soften PVC, has a great influence on the kidney, liver and testis of human body, which will lead to cancer and kidney damage, destroy the functional reconstruction system of human body and affect development (cold water can only be used instead of hot water, which is fragile in winter).
3. Galvanized pipe: As a water pipe, after several years of use, a large number of rust scales are produced in the pipe. The yellow water not only pollutes the sanitary ware, but also is mixed with bacteria that breed on the unsmooth inner wall. Due to corrosion, the content of heavy metals in water is too high, which seriously endangers human health (the state has issued regulations prohibiting it from being used as a drinking water pipeline.
Advantages: complete varieties and many accessories.
Disadvantages: It belongs to the obsolete products explicitly prohibited by the state, and it is easy to corrode and rust, resulting in poor water flow and easy pollution of water sources.
Extended data:
Selection method of domestic water pipe:
First, go to the regular building materials market to buy as needed, so that the quality of water pipes is more guaranteed.
Second, check the surface of the water pipe to see if its appearance is smooth and uniform. You can touch it with your hands to see if it feels delicate. At the same time, it depends on whether the water pipe is marked with the manufacturer's anti-counterfeiting logo. If not, you'd better not buy it.
Third, look at the color of the water pipe. High-quality stainless steel water pipes are generally silvery white, and dark ones are generally not passivated by acid and alkali, which is easy to scale. The color of high-quality PPR tubes is generally sub-smooth milky white, and there will be no variegated particles in it. If the color of the water pipe has some noise, it means that the quality of the water pipe is not good.
Fourth, plastic pipes should smell the water pipes. If the water pipe has an irritating smell, it means that the quality of the water pipe is not good, and the high-quality water pipe will not have an irritating smell.
References:
Baidu encyclopedia-pipeline