PIPE CONSTRUCTION
WHAT ARE THE DIFFERENT LAYERS MADE OF?
Polyethylene
* Non-linked long chain carbon based polymer.
* Essentially a weak intermolecular chain.
* Lack of heat resistance allows molecules to move freely.
* Heat results in material becoming softer and offers no creep resistance.
Cross–linked polyethylene PE (x) b
* Creates direct bonds between the chains.
* This restricts the movement between the chains, preventing deformity and creep.
* Excellent heat resistance and structural strength, can be thermally aged at 190°C without losing it’s shape.
* Temp. resistance(Thermoplastic to thermo-elastic polymer)
THERMAL EXPANSION
The permanent bond of Pex layers to the aluminium considerably reducers heat expansion.
The combination of plastic and metal makes LINEA a permanently reliable system for its use in all common HOT and COLD water installations. Internal Pressure- Rupture Strength tests have proven, that LINEA pipe exceeds the general required DVGM standards 70 degC / 10 bar / 50 years by far. Therefore , up to 95 deg C water temperature in heating systems are no problem at all, also in the long term. It can also be confirmed that up to 80 bar burst pressure is quite usual.
