... hot and cold water pipe, also can be used for pure water system.2, heat insulating and ... . Pp-r good weldability, pipe, tube can be used to melt and fused connection, convenient installation, reliable connector, ... or discharge of chemical industry etc in piping systems.How to secure and economic chooses pp-r pipe?1, ... .N 1.0 ~ 160 MPa pipes, fittings, Used for hot water system PN2.0 MPa experiment.it ...