Plastic pipes have achieved great development and improvement in the design theory and construction technology of buildings, and accumulated rich practical experience, which has promoted plastic pipes to occupy a very important position in the construction of water supply and drainage pipeline engineering, and form a first An unstoppable development trend. In our country, most plastic pipes used in water supply pipelines mainly include PVC-U water supply pipes, PP-R pipes, aluminum-plastic composite pipes (PAP), steel-plastic composite pipes (SP), HDPE pipes, etc. HDPE pipe adopts advanced production technology and technology and is formed by hot extrusion. It has the characteristics of corrosion resistance, smooth inner wall, low flow resistance, high strength, good toughness, and light weight. After PVC-U drainage pipes, HDPE pipes have become the second most consumed plastic pipe variety in the world.
