... resistance, scaling and long service life Pp-r pipePp-r pipe and tube type, using polypropylene is ... copolymerization, injection pipe fittings become.Pp-r pipe what features?Pp-r pipe in general plastic light weight ... features:1, non-toxic and health. Pp-r materials molecules only carbon, hydrogen, no harmful ... can choose C = 150,2, for more than 40 degrees Celsius (cold) system, the selection P.N ...