PE water supply and drainage pipe (polyethylene) material is widely used in the field of water supply pipe manufacturing because of its high strength, corrosion resistance, non-toxic and other characteristics. Because it does not rust, it is an ideal substitute for ordinary iron water supply pipes. PE water supply pipes shall comply with national standards for products: Polyethylene (PE) Pipe Systems for Water Supply Part 2: Pipes (GB/T 13663.1-2017 and GB/T 13663.2-2018). There are many connection modes between polyethylene pipes and pipes, pipes and PE pipes, pipes and fittings, and polyethylene pipes and metal pipes. Different connection modes have their own advantages and limitations. Users can choose the appropriate connection mode according to the pipe diameter, working pressure, use place and other environments. The most commonly used connection methods of urban water supply polyethylene pipes are: hot-melt connection, electrofusion connection, socket flexible connection, flange connection, steel plastic transition joint connection, etc.