>>> Don't watch it regrets this site friend PPR plumbing installation live broadcast The selection and installation of water pipes in “hidden projects†has become one of the issues that cannot be ignored. In order to make the living room look beautiful, people generally use buried wall construction when decorating, and once the water pipe leakage and bursting will bring irreparable consequences. In the past, pipes used for water supply were mainly cast iron pipes. Sand cast iron pipes are mainly used outdoors, and galvanized iron pipes are used indoors. They can be divided into cold (electric) galvanized and hot galvanized. The galvanized pipe is used as a water pipe. After a few years of use, a large amount of rust is generated in the pipe. The outflow of yellow water not only pollutes the sanitary ware, but also contains bacteria that grow on the rough inner wall. Corrosion causes excessive levels of heavy metals in the water and seriously harms human health. There are three main types of pipelines currently in use. The first category is metal pipes, such as hot-dip cast iron pipes, copper pipes, stainless steel pipes and so on. The second category is plastic compound metal pipes, such as plastic compound steel pipes and aluminum plastic composite pipes. The third category is plastic pipes, such as PP-R (cross-linked poly{TodayHot} propylene high density mesh engineering plastics). The State also stipulates that various pipes and fittings involving drinking water pipelines must be approved by the Ministry of Health before they can be sold. (1) Aluminum plastic composite pipe Aluminum-plastic composite pipe is one of the more popular pipes in the market. It is light, durable, and convenient to construct. Its flexibility is more suitable for home use. The main drawback is that when used as a hot water pipe, due to long-term thermal expansion and contraction, it may cause misalignment of the snap-on connection and cause leakage. (2) PP-R tube As a new type of water pipe material, PP-R pipe has unique advantages, it is non-toxic, light weight, pressure resistance, corrosion resistance, using a special hot melt connection, will not rust, and PP-R pipe is not Scale will become a popular material. 1 Product Name: The product name of True PP-R shall be "PP pipe for hot and cold water or "PP-R pipe for hot and cold water", where the ultra-fine particle modified polypropylene pipe (PP-R) or PP-R cold water pipe, PP-R hot water pipe, PP-E pipe and other informal names are pseudo PP-R pipe. 2 The density of pseudo PP-R is slightly larger than that of true PP-R. 3 True PP-R tube is matte white or other colors, pseudo PP-R tube shiny bright or colorful. 4 The true PP-R tube is completely opaque, and the pseudo PP-R tube is slightly translucent or semi-transparent. 5 The genuine PP-R tube feels soft and the fake PP-R tube feels smooth. 6 True PP-R pipe landing sound more dull, fake PP-R pipe landing sound more crisp. It should be pointed out that the service life of the pseudo-PP-R pipe is only 1-5 years, while the service life of the real PP-R pipe is more than 50 years. (3) Brass The copper pipe has the advantages of corrosion resistance, sterilization, etc., and is a superior product in the water pipe. There are two types of copper pipe joints in the way of card socket and welding. Card sleeves, like aluminum-plastic tubes, suffer from long-term aging and leakage problems. Therefore, most of the users who install copper tubes use welding. Welding is the interface where oxygen is welded together. This can be the same as PP-R tubes. leakage. One of the disadvantages of copper tubes is their high thermal conductivity. Therefore, the hot water tubes produced by famous copper tube manufacturers are covered with plastics and foaming agents that prevent the heat from escaping. Another disadvantage of copper tubes is that they are expensive. (4) stainless steel tube It is a very expensive water pipe. It is difficult to construct and is rarely used. Its performance is similar to that of copper pipes. Water pipe purchase entrance decoration restaurant decoration stainless steel interior decoration door price home decoration Diamond Vacuum Brazed Profile Grinding Wheel CHANGZHOU ANTALYA TOOL AND MACHINERY CO., LTD. , https://www.atly-tool.com
Qijia expert teaching: selection and classification of plumbing materials