... , not only for hot and cold water pipe, also can be used for pure water system.2, heat ... pipe main USES what?1, building of hot and cold water systems, including centralized heat-supply system, ... heating system,Three, can be directly drinkable water supply system,4 and the central air conditioning ... 40 degrees Celsius (cold) system, the selection P.N 1.0 ~ 160 MPa pipes, fittings, Used for hot water ...