PP-R Pipe

PP-R pipe is a thermoplastic piping system extruded from random copolymer polypropylene (PP-R) material. It offers good heat resistance (continuous use at 70 °C, short-term up to 95 °C), pressure resistance (nominal pressure PN1.0–2.5 MPa), and hygiene (compliant with drinking water standards). It uses heat fusion socket connections to achieve molecular-level, leak-free joints. Specifications are denoted by outer diameter × wall thickness (e.g., dn20×2.8 mm), and pressure ratings are classified into series such as PN10 and PN16. With advantages such as resistance to scaling, energy-efficient insulation (thermal conductivity only 1/200 that of metal pipes), and a long service life (over 50 years), PP-R pipes have become a widely used material in building hot and cold water supply systems (especially concealed piping), pure water delivery, and central air-conditioning systems. Their environmentally friendly properties (recyclable) and ease of installation (no threading required) have led them to replace traditional galvanized steel and copper pipes in many water supply applications.