The structure of poli-pex pipes is made up of 3 layers of tight materials. The inner layer is cross-linked polyethylene using a silane process (PE-Xb) on the surface of which an EVOH layer is extruded that acts as an oxygen barrier.

Adhesion between the layers is guaranteed by a special adhesive that is extruded between them. A specially developed compound for this product allows PE-X pipes to combine the advantages of using synthetic pipes with a high degree of flexibility, leading to simple and rapid installation and a consistent reduction in stress, even upon termination of the laying procedures.

The poli-pex pipe range offers the following advantages:

– Durability and mechanical strength
The system has a durability that is guaranteed by the product standards of at least 50 years of use.

– Corrosion resistance
The polymeric nature of the used materials ensures a total absence of corrosive phenomena which is typical of metals.

– Sound absorption
Cross-linked polyethylene is able to absorb vibrations to a high degree, giving it excellent soundproofing properties. In addition, the reduction of pressure losses allows operation in low-velocity regimes, which favors noise reduction.

– Impermeability to oxygen and light
The EVOH layer constitutes an oxygen barrier that avoids algae formation and corrosion of the metal parts that constitute the plant. n Eco-friendly Polipex pipes are manufactured using recyclable materials which can be sent for recovery at the end of their lifetimes.

Composition:
PE-Xb (cross-linked polyethylene)

Material:
1) inner: cross-linked polyethylene layer (PE-Xb)
2) intermediate: an adhesive layer
3) outer: EVOH oxygen barrier

Colour:
translucent white

Inner layer chemical cross-linking:
PE-Xb with silanes, minimum cross-linking value 65%

Density at 23°C:
0.95 g/cm³ (cross-linked polyethylene)

Oxygen permeability:
<3.6 mg/m2 • day (according to DIN 4726)

Maximum temperature:
in continuous operation 100°C

Minimum temperature:
-45°C (below 0°C, glycol or antifreeze additives are required)
Thermal conductivity:
0.38 W/mK

Coefficient of linear thermal expansion:
0.19 average mm/mK

Internal roughness:
0.007 mm

Bending radius:
6 x diameter