PP-R (polypropylene random tube), also known as three-type polypropylene tube and also known as random copolymer polypropylene tube or PPR tube, with energy saving materials, environmental protection, light high strength, corrosion resistance, smooth wall non-scaling, construction and Easy maintenance, long service life, etc., are widely used in building water supply and drainage, urban and rural water supply and drainage, urban gas, power and cable sheathing, industrial fluid transportation, agricultural irrigation and other construction, municipal, industrial and agricultural fields. PP-R tube with random copolymer polypropylene extruded into apipe, injection into apipe