... 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 ... is convenient, reliable connect. Pp-r good weldability, pipe, tube can be used to melt and fused connection, convenient ... affect the quality of products.Pp-r pipe main USES what?1, building of hot and cold water systems, ...