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HercuPex Pipe

HercuPEX Oxygen Barrier Especially for central heating and under floor heating, the manufactures linked polyethylene pipe with oxygen barrier.

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HercuPex Pipe


The HercuPEX Oxygen Barrier pipe consists of 3 layers:

  • Inner layer linked polyethylene..
  • Binder layer for better adhesion of the EVOC with the main pipe.
  • oxygen barrier layer (EVOH-ethylene vinyl alcohol polymer)

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Additional properties from those of ordinary pipe Pex, are discussed below:

    • The specific oxygen barrier prevents oxygen and other gases to penetrate through the tube, the closed circuit heating and corrode metal parts of the system (e.g., radiators, boilers, valves). In the case of under floor heating, where the circuits are long lengths such use is considered essential.
    • Have higher mechanical strength than the ordinary pipe Pex, because two additional 0,15mm thick layers are additive material. For example, the usual Pex pipe must have a minimum outside diameter of 16mm and a minimum wall thickness 2,00mm to cover the DIN 16892. The pipe with oxygen barrier must have a minimum outside diameter of 16,3mm and 2,15mm minimum wall thickness to meet the DIN 16892 (mechanical strength) and DIN 4726 (defining the oxygen permeability).
    • They have smaller linear expansion. In laboratory tests, HercuPEX pipe samples at 120ºC show shrinkage of 0.8% (limit according to DIN 3%). The pipes HercuPEX with Oxygen Barrier exhibit shrinkage of 0.5%.
Nominal External Diameter (mm) Actual External Diameter (mm) Nominal Wall Thickness (mm) Actual Wall Thickness (mm) Weight (kgr/m) Packaging (m)
14* 14.3 2.00 2.15 0.081 200
15 15.3 2.50 2.65 0.103 200
16 16.3 2.00 2.15 0.097 200
16 16.3 2.20 2.35 0.105 200
17 17.3 2.00 2.15 0.105 200
18 18.3 2.00 2.15 0.111 200
18 18.3 2.50 2.65 0.131 200
20* 20.3 2.00 2.15 0.130 200
20* 20.3 2.80 2.95 0.166 200

Advantages of Pex Pipe:

    1. Flexibility: PEX pipe is highly flexible and can be bent around corners and obstacles without the need for many fittings, reducing the risk of leaks.
    2. Corrosion Resistance: PEX is resistant to corrosion, which prolongs the lifespan of the pipe and reduces the risk of rust or mineral buildup that can occur in metal pipes.
    3. Freeze Resistance: PEX is more resistant to freezing than traditional metal pipes. It can expand slightly without bursting, making it a good choice for cold climates.
    4. Reduced Noise and Water Hammer: PEX pipes tend to reduce water hammer and noise compared to metal pipes, which can be especially beneficial for plumbing systems.
    5. Cost and Time Savings: PEX is often faster to install than traditional pipes due to its flexibility and the use of fewer fittings. This can translate to lower labor costs.
    6. Less Heat Loss: PEX's insulating properties result in less heat loss in hot water supply lines, contributing to energy efficiency.

Types of PEX Pipe

Types of PEX Pipe: There are three main types of PEX pipe, each color-coded for identification purposes:

  1. PEX-A (Engel Method): Cross-linking is done through a chemical method known as the Engel method. PEX-A is the most flexible type and is less prone to stress fractures. It can be repaired more easily if it gets kinked.
  2. PEX-B (Silane Method): Cross-linking is achieved by exposing the PEX material to electron beams. PEX-B is less flexible than PEX-A but still suitable for most plumbing applications.
  3. PEX-C (Irradiation Method): Cross-linking is done through a high-energy electron method. PEX-C is stiffer than PEX-A and PEX-B but maintains its shape well when bent.

PEX Fittings: PEX piping uses specific fittings, often made from brass or other compatible materials. Common types of fittings include crimp, clamp (also known as cinch), and push-fit fittings. These fittings create secure connections between PEX pipes and are designed to withstand pressure and temperature variations.

Applications of PEX Pipe:

  1. Potable Water Supply: PEX is used for cold and hot water supply lines in residential and commercial buildings.
  2. Radiant Heating Systems: PEX tubing is used in hydronic radiant floor heating systems to circulate warm water through the floor, providing efficient and even heat distribution.
  3. Plumbing Systems: PEX is commonly used for plumbing systems, replacing traditional copper or PVC pipes in many cases.
  4. Snow and Ice Melting Systems: PEX tubing can be used in outdoor systems to melt snow and ice on driveways, walkways, and roofs.
  5. Chilled Water Systems: PEX can also be used for circulating chilled water in cooling systems.

Installation Considerations:

    • Proper tools, such as crimping or cinching tools, are necessary for secure connections.
    • PEX should be protected from direct sunlight and UV exposure, which can degrade the material over time.
    • Local building codes and regulations should be followed during installation.
    • Proper insulation is important in hydronic heating systems to prevent heat loss.

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