... polypropylene copolymerization, injection pipe fittings become.Pp-r pipe what features?Pp-r pipe in general plastic light weight, ... , reliable connect. Pp-r good weldability, pipe, tube can be used to melt and fused connection, convenient installation, reliable connector, its ... chooses pp-r pipe?1, pay attention to the pipeline using coefficient C (i.e. general safety coefficient) : general situation ...