PE is polyethylene. PE has a wide range of uses and can be divided into high density, low density and linear PE. The most common use is to make various plastic films and sheets. PE pipes include medium density polyethylene pipes and high density polyethylene pipes. According to the wall thickness, it is divided into SDR 1 1 and SDR 17.6 series. The former is suitable for transporting gaseous artificial gas, natural gas and liquefied petroleum gas, while the latter is mainly used for transporting natural gas. Compared with steel pipes, the construction technology is simple and flexible, and more importantly, it does not need anti-corrosion treatment, which will save many working procedures. The disadvantage is that the instrument is not as good as steel pipe. During construction, special attention should be paid to the safe spacing of thermal heating, which should not be exposed in the air and sensitive to chemicals to prevent the leakage of sewage pipes from causing harm. PVC is polyvinyl chloride, which is a plastic product made of 43% oil and 57% salt. Compared with other kinds of plastic products, PVC uses raw materials more effectively and reduces fuel consumption. At the same time, the energy consumption of PVC manufacturing industry is also very low. And in the later period of PVC product use.

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