The PE(PEX)-AL-PE(PEX) composite pipe is smooth , rustproof, toxic-free, not to fur up inside . Its ability to conduct water is 30% more efficient than the other metal pipes with the same diameter .It is accessible to bend and installed by rounding the beam ,embedded into the wall the concrete ,easily located with a metal detector . Goldstone pipe is widely applied in the cold and hot water supply,solar power and air conditioner pipe system in the industrial and civil works.

Ply-pipe consists of a core aluminum with inner and outer layer of plastic ,so it can suffer more high pressrue and prevent the oxyen from penatrating the pipe. The pipe is long enough to decrease tie -in connects .So the Goldstone pipe is widely applied in the transmition of the compressed air ,fuel gas ,oxyen etc.

The inner and outer layers of composite pipe consist of PE(PEX) .So the material has no chemical reaction with the other chemical element, it is clean and safe for the medical use, it can guarantee the safety of the oxygen, it is safe to transmit oxygen in medicine, it can keep the material field, it is sure the food transmitted will not be polluted

Heating system of under floor is a high standard heating way. This way can be popularly used in the foreign countries and more and more in our nation. Multi-layer pipe is hard but easy to bend , retaining the former shape .It can adapt the temperature scope (-40---95C),so the Multi-layer pipe is the best choice in the heating system of under floor.