SIWEITE brand stainless steel PP-R composite pipe, the inner layer adopts imported 304-2B food class stainless steel, outer layer adopts Finland BOREALIS (North European Chemical) RA130E PP-R, the middle layer adopts high intensity heat glue made in Japan. It has the advantage of metal pipe and plastic pipe, solved the problem of PP-R, PE's expand distortion when meets heating, bad temperature holding character , low water pressure, water heater hard to ignite. It is suit for the application of hot water transportation system. The pipe and pipe fittings adopts heat melting connection, which will never leak, can be applied in the pipe transportation system of medical water supply, North section's water heating and air heating, high class uptown, high building, stove room, bath center, high pressure water supply.