PE is polyethylene plastics, the most basic kind of plastic, plastic bags, fresh-keeping films are PE, HDPE is a high crystallinity, non-polar thermoplastic resin. The original HDPE is milky white in appearance and translucent in slight section. PE has excellent resistance to most domestic and industrial chemicals.
PE pipe welding, PE pipe butt welding, this method provides the highest reliability and diameter range and pressure process: the end of the heated pipe, using a tool, known as contact pressure and temperature under the definition of "mirror image". The ends are quickly contacted and kept under pressure during cooling.
PE pipe has medium density polyethylene pipe and high density polyethylene pipe. SDR11 and SDR17.6 series are classified according to wall thickness. The former is suitable for transporting artificial gas, natural gas and liquefied petroleum gas, while the latter is mainly used for transporting natural gas. Compared with steel pipe, the construction technology is simple and flexible. More importantly, it is not used as anticorrosive treatment, which will save a lot of working procedures. The disadvantage is that the equipment is inferior to the steel pipe. Special attention should be paid to the safe distance of thermal heating during construction, and it can not be exposed to the sunshine in the air, and it is sensitive to chemicals, so as to prevent the leakage of sewage pipelines from causing harm.
In China's municipal pipe market, sewage pipe and gas pipe are the two largest application markets.
PE chemical Chinese name is polyethylene, PE material because of its high strength, high temperature resistance, corrosion resistance, non-toxic, wear resistance and other characteristics, is widely used in the field of water supply and drainage manufacturing. Because it will not rust, it is an ideal pipe material to replace ordinary iron water supply pipe.
Therefore, the National Bureau of Standards has made a lot of revisions in the new GB/T 13663-2000 standard, stipulating that different levels of PE80 and PE100 of water supply pipes correspond to different pressure strengths, and removing the tensile strength performance in the old standard, increasing the elongation at break (more than 350%), that is, emphasizing the basic toughness.
