PP-R pipe is also called three-type polypropylene pipe and random copolymerization polypropylene. Random copolymerization polypropylene can be extruded into pipes or injected into pipe fittings. Polypropylene random copolymer is also a kind of polypropylene. The basic structure of its polymer chain is modified by adding different kinds of monomer molecules. Ethylene is the most commonly used monomer, which causes changes in the physical properties of polypropylene. Compared with pp homopolymer, random copolymer has improved optical properties (increased transparency and reduced turbidity), improved impact resistance, increased flexibility, reduced melting temperature, and thus also reduced hot melt temperature; At the same time, the properties of chemical stability, water vapor isolation and organosensory properties (low odor and taste) are basically the same as homopolymer. Used in extrusion, blow molding, injection molding, film and sheet extrusion processing fields, as food packaging materials, pharmaceutical packaging materials and daily consumer goods.

PPR pipe installation recommendations
In general, during water and electricity renovation, the original water pipes will be replaced. Home decoration companies and businesses recommend that decorators use hot water pipes when installing PPR pipes, even in areas where cold water flows through. Their argument is that due to the fact that the technical parameters of hot water pipes are higher than those of cold water pipes, and the price difference is not significant, hot water pipes are used for waterway renovation.