The insulation effect of Polypropylene tube ppr pipe for hot water is 4 times and 9 times that of ordinary insulation pipe in the past. Also, its water absorption rate is very low. The reason for the low water absorption rate of polyurethane foam is that the sealing rate of polyurethane foam is up to 92%. Polypropylene tube ppr pipe for hot water is the ideal choice for solar energy, thermal energy system, residential heating system, central air conditioning, chemical/petroleum and other corrosive liquid pipe network, factory compact air pipe network, building water supply system, apartment community, underground water supply system, industrial and water treatment pipe system, large drinking water projects, etc.