The plastic pipe industry in my country is experiencing rapid development and continuous improvement in quality. They mainly produce polyvinyl chloride (PVC-U) pipe, polyethylene (PE) pipe and polypropylene (PP-R) pipe. Among them, PE pipes are widely used in various fields such as building water supply, building drainage, buried drainage pipes, building heating, gas transmission and distribution, gas transmission pipes, electrical and telecommunication protection casings, industrial pipes, and agricultural pipes. PE pipes play an essential role in urban water supply, urban gas supply and farmland irrigation. They are becoming increasingly popular due to their superior properties and affordability.