I.Features：
PERT-AL-PERT composite pipe is composite pipe of five layers, inside and outside layers of which are made of PERT, 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
26-32
Butt welding Size(mm)
12-16
16-20
20-26
26-32

III.Advantages:
1.Great flexibility
2.No salts are deposited on the inner surface
3.Without electrolysis
4.Small thermal expansion
5.Resistance to adverse conditions (high temperature, high pressure)
6.Wide range of dimensions
7.Easy connection to all conection systems of plastic pipe
8.Guaranteed quality and insurance for their good function
9.100% oxygen barrier existence

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
Blasting strength 5.5~8Mpa
Penstock radial tension 2300~3270N
V.Application:
1.Cold and hot water distribution.
2.Solar system, air-conditioning and refrigeration system
3.Underfloor heating PEX systems
4.Medical, foodstuff and chemical industries PEX pipe systems
5.Gas and air distribution