... 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 ... .4 and long service life. Pp-r pipe in working temperature, pressure (70 ° c P.N) 1. OMPa condition, use life ...