The three-type polypropylene (PP-R) water supply pipes and fittings are made of random copolymer polypropylene as raw materials, and are processed and formed into green products at one time through the gas phase copolymerization process. PP-R will not release heavy metals or other health-damaging substances in contact with drinking water. It meets hygiene and health standards and is a sanitary and environmentally friendly water pipe suitable for drinking water and food industry. We strictly produce and fully comply with GB / T18742 national standards and GB / T17219-1998 sanitary standards.