Metal-plastic pipe with increased wall thickness PEX-Al-PEX

Metal-plastic pipe with increased wall thickness PEX-Al-PEX


PEX-Al-PEX Palanzh pipes with increased wall thickness are a new generation of multilayer metal-plastic pipes that have high performance characteristics and maximum thermal resistance to peak loads.

The increased wall thickness of PEX-Al-PEX Palanzh pipes allows the use of axial pressing technology - that is, connections on a slip-on sleeve (without O-rings). This type of connection is the most robust, reliable and durable today and is ideal for concealed installation, including embedding in concrete. Making a connection on a sliding sleeve requires the installer to handle a special tool, but practically eliminates an error or flaw in the connection.

The structure of a reinforced plastic pipe with increased wall thickness PEXb-Al-PE:

The first inner layer is made of PEXb cross-linked polyethylene. The polyethylene of the inner layer was crosslinked using the organosilane method. The inner (working) layer has a crosslinking degree of 65%.

The inner (working) layer has an increased wall thickness, which provides resistance to long-term increased loads:

  • for diameter 16mm - 2.6mm (compared to standard 2.0mm)
  • for diameter 20mm - 2.9mm (compared to standard 2.0mm)
  • for diameter 25mm - 3.7mm (compared to standard 2.5mm)
  • for diameter 32mm - 4.7mm (compared to standard 3.0mm)

The second layer is a high-quality adhesive composition, which has good adhesion to both polyethylene and aluminum, and ensures a reliable connection of all layers.

The third layer is aluminum foil, which prevents oxygen diffusion and provides strength and low linear thermal expansion of the pipe. The edges of the foil are butt-welded to each other by TIG welding.

The fourth layer is a high-quality adhesive composition that has good adhesion to both polyethylene and aluminum, and ensures a reliable connection of all layers.

The fifth outer layer is made of high density PE polyethylene, which provides reliable protection against environmental influences and prevents condensation.

PEX material (English PE - PolyEthylene - polyethylene, X - Cross-linked - cross-link) is cross-linked polyethylene. This material is obtained by special processing of polyethylene raw materials by chemical or physical methods, due to which additional, much stronger cross-links between molecules are formed. Such crosslinking significantly improves both the chemical and physical characteristics of the material, due to which it becomes more durable and heat-resistant.

PEXb pipes are produced by the so-called silane process, when the molecular bonds are changed under the action of a catalyst, which is the silane.

A distinctive feature of PEX pipes is their ability to regain their shape ("shape memory") after deformations.

The advantages of metal-plastic pipes are high strength and heat resistance, resistance to corrosion, overgrowth, silting and salt deposition; high chemical resistance, resistance to mechanical damage, low roughness, gas tightness, high noise absorption capacity, low thermal conductivity, low coefficient of linear expansion, high ductility and light weight, technological and economical installation.

Compliance with the passport operating conditions guarantees a 50-year service life of the products

Model overview

Those. information

Metal-plastic pipe with increased wall thickness PEX-Al-PEX

(1,2,4,5 operating classes)

Vendor code Name Color
PEX 5A1627S Trumpet Pex-Al-Pex 16,0 х 2,6 Palanzh Silver
PEX 5A2027S Trumpet Pex-Al-Pex 20,0 х 2,9 Palanzh Silver
PEX 5A2527S Trumpet Pex-Al-Pex 25,0 х 3,7 Palanzh Silver
PEX 5A3427S Trumpet Pex-Al-Pex 32,0 х 4,7 Palanzh Silver

Geometric characteristics of PEX-Al-PEX pipes with increased wall thickness

  16×2,6 20×2,9 25х3,7 32×4,7
Outside diameter, mm 16 20 25 32
Wall thickness, mm 2,6 2,9 3,7 4,7
Inner diameter, mm 10,8 14,2 17,6 22,6
Aluminum thickness, mm 0,3 0,3 0,3 0,3
Weight 1 r.m. pipes, g 141 190 303 479
Internal volume 1 r.m. pipes, l 0,092 0,158 0,243 0,401
Pipe length in a coil, m 100 100 100 50
Minimum bending radius, mm 80 100 125 160

Technical characteristics of PEXb-Al-PE pipes with increased wall thickness

Service class according to GOST R53630 1,2,4,5, ХВ
Maximum working pressure, bar 10
Working temperature Тwor, °С 80
Maximum working temperature Тmax, °С 90
Short-term (emergency) temperature Тemer, °С 100
Thermal conductivity coefficient, W / m ∙ K 0,43
Linear expansion coefficient, mm / m ∙ K 0,025
Equivalent roughness coefficient, mm 0,007
Oxygen diffusion, mg / l 0
Adhesive bond strength, n / cm 80
Polyethylene crosslinking method Silanol (PE-Xb)
The degree of crosslinking of polyethylene, % >65%
Service life subject to the passport operating conditions, years 50


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