I.Features：
PEX-AL-PEX composite pipe is composite pipe of five layers, inside and outside layers of which are made of Cross-Linked (PEX), tightly bonded with melt adhesive to the mid-layer of aluminum core which is longitudinally welded in a butt-welded or overlap-welded way, this kind of pipe is the perfect union of metal and the plastic ones.
II.Specification:

Overlapped welding Size(mm)   
12-16
16-20
20-26
2632
Butt welding Size(mm)
12-16
16-20
20-26
26-32

III.Advantages:
1.Compared with the metal pipe, the composite pipe has the same strength, easy to bend, reluctant to retain former shape;
2.Super properties of high temperature, high pressure and corrosion resistance;
3.Smooth inner surface of the pipe reduces resistance to the fluids. The ability to conduct water is 30% more efficient;
4.Good property of heat preservation, heat conduction coefficient is 0.45W/m.k,which is much less than metal pipes and it can save insulation materials outside the pipe;
5.Easy to cut and install;
6.Life pan of the composite pipe is more than 50 years.

IV. Technical Parameters:
Heat Conduction Coefficient: 0.45W/(m.K)
Expansion Coefficient 2.5x10-5（m.k)
Bend Radius >=5D
Working temperature  :-40-+95°C
Working Pressure 1.25MPA
Oxygen Diffusion 0mg/1.d
Burst Pressure >=4.0-7 MPA
Tensile Resistance >2100-2650N

V.Application:
1.Under floor heating;
2.Heating system of Cali duct and wall, the equipment for snow melting in cold regions;
3.Heat and cold pipes for life, solar energy water heater, irrigation engineer in agriculture;
4.Pipes for coal gas and natural gas, air-condition and blower;
5.Pipes for electric wire and cable;
6.Pipes for oil and industrial liquids transportation.