... 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 ... following features:1, non-toxic and health. Pp-r materials molecules only carbon, hydrogen, no harmful ... it 70 degrees may be at higher temperature for a long time, can choose C = 150,2 ...