PP-R pipe, also known as three-propylene polypropylene pipe, random copolymerized polypropylene pipe or PPR pipe, is a pipe made of random copolymerized polypropylene. HDPE pipe is a pipe made of high-density polyethylene (English name is “High Density Polyethylene”, referred to as “HDPE”). HDPE pipe is the replacement product of traditional steel pipe and PVC drinking water pipe. 1. The density is different. The density of HDPE pipe is higher than that of PPR pipe. The former is high-density polyethylene, and ... Read More