... ppr pipe CE and ISO 9001: 2000 PEX-AL-PEX, PEX, PPR, PE, PEX-A/B, PE-RT Quality . Trust . Stable Aluminum-plastic ppr pipeMINGDA PPR ... consisited of five layers. They have better properites than normal PPR Pipes.Greatly reduced linear expansion coefficient, only 1/4 ... life can last up to 50 years.Resistance against chemicals - PPR piping systems are intended mainly for water distribution (drinking, ...