Multilayer Pipe Company

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1. PEX-c sanitary pipes
Sanitary pipes made of electron beam cross-linked polyethylene are intended for hot and cold tap water installations.

The cross-linking process increases their strength and resistance to fatigue. Working conditions: temperature of 70 °C, pressure of 10 bar. Maximum working temperature 90 °C. The pipes meet the requirements of the DVGW W 544 and DIN 16892/93 standards and are certified by PZH (the Polish National Institute of Hygiene) and KTW (Kunststoff-Trinkwasser).

2. PEX-c/EVOH, PERT-EVOH heating pipes
Pipes with an EVOH diffusion barrier are intended for central heating and underfloor heating installations.
Maximum working temperature up to 90 °C, maximum working pressure up to 10 bar, depending on the geometry of the pipe (wall thickness). The pipes meet the requirements of the DIN 4726 standard. High-density polyethylene has a relatively high permeability to gases (CO2, O2), odors and some liquids. Therefore, an EVOH layer is used to reduce the permeation of such compounds. EVOH is an ethylene-vinyl alcohol copolymer resin which has a low gas permeability and good processability. In this way, the risk of corrosion of metal parts of the installation is eliminated.

3. Multilayer PEX/Al/PE (-RT/-HD), PE-RT/Al/PE(-RT/-HD) pipes
The multilayer pipes consist of five layers:

  • PEX-c or PE-RT as the base layer,
  • adhesive layer,
  • aluminum – butt-welded with a laser,
  • adhesive layer,
  • a protective coating made of stabilized polyethylene (PE-HD) or PE-RT material.

With aluminum used, these pipes have a 100% anti-diffusion barrier, which prevents oxygen from penetrating into the installation. Additionally, composite pipes of this type are characterized by minimal thermal expansion, which simplifies the assembly of the system. They are designed for hot and cold water, central and floor heating systems. The maximum continuous operating temperature of these pipes is 90 °C, the maximum continuous operating pressure is 10 bar. The specific operating parameters depend on the materials used and the end designation of the product and may be lower than the above.

4. Five-layer PE-RT/EVOH/PE-RT pipes
The five-layer pipes made of PE-RT base material consist of:

  • inner layer made of PE-RT type II material,
  • internal adhesive layer,
  • barrier layer made of EVOH copolymer,
  • external adhesive layer,
  • outer layer made of PE-RT type II material.

These pipes, thanks to the use of a barrier layer, are intended for heating installations, especially for underfloor heating. The use of the flexible PE-RT material facilitates the laying of long pipe sections in underfloor heating installations, and the application of a five-layer structure reduces the possibility of damaging the barrier layer during storage, assembly and operation of the installation. The maximum continuous operating temperature in underfloor heating systems is 70 °C, and the typical maximum operating pressure is 6 bar (depending on the diameter and wall thickness).