... reach 100 years.5, installation is convenient, reliable connect. Pp-r good weldability, pipe, tube can be used to melt and fused ... connection, convenient installation, reliable connector, its connected intensity than pipe itself.6 and material recycling. Pp-r waste after cleaning, broken ... 10% of total amount, does not affect the quality of products.Pp-r pipe main USES what?1, building of hot and ...