... weight, corrosion resistance, scaling and long service life Pp-r pipePp-r pipe and tube type, using polypropylene is become by extrusion ... of polypropylene copolymerization, injection pipe fittings become.Pp-r pipe what features?Pp-r pipe in general plastic light weight, corrosion resistance ... degrees Celsius (cold) system, the selection P.N 1.0 ~ 160 MPa pipes, fittings, Used for hot water system PN2.0 ...