As a new type of pipe, aluminum-plastic composite pipe adopts butt welding process and physical and chemical composite methods to melt polyethylene at high temperature and heat aluminum pipe. A layer of adhesive is added between aluminum and polyethylene to form a five-layer structure of polyethylene, adhesive, aluminum pipe, adhesive and polyethylene. This new type of composite pipe is formed by the integration of five layers of materials through high temperature and high pressure. It fully reflects the respective advantages of metal materials and plastics and makes up for their shortcomings. It has the following characteristics:

1. High pressure strength, good temperature resistance (PAP pipe working temperature - 40-60 ℃, XPAP pipe working temperature - 40-95 ℃), sanitary and non-toxic, long service life, and can be applied to building cold and hot water pipelines.

2. Integrating rigidity and flexibility, it can quickly eliminate the pressure impact in the pipeline system and will not produce water hammer noise.

3. It adopts embedded clamping joint connection, which is convenient for installation; The pipe can be bent freely, which can reduce pipe joints and elbows without rebound. It can bypass beams and columns and other components according to the actual situation, reducing a large number of elbows, saving 50% labor compared with galvanized steel pipe.

4. The coefficient of thermal expansion is 2.5 × 10-6m / m.k, only 1 / 8 of PVC pipe.

5. Flame retardant performance is far better than PVC pipe, good corrosion resistance, and can transport all kinds of corrosive liquids and gases.