ASTM F1282 : 2010 (PE-AL-PE) & AS 4176-2 : 2010 (PEX-AL-PEX) & AS 2492 : 2007 (PEX)

Composite Polyethylene Aluminium (PA) pipe, in the form of PE-AL-PE or PEX-AL-PEX, is the composite pipe of 5 layers. It consists of a middle Aluminium layer with an inner and outer plastic layers, tightly bonded with a special adhesive to the Aluminium core. The plastic materials used for the inner and outer layers are either cross-linked polyethylene (PEX) or polyethylene (PE), which is hygienic, toxic-free and smooth. The middle Aluminium layer is absolutely 100% diffusion tight which reliably prevents gases and oxygen from permeating into pipe. Such structure compensates and reduces snap-back forces and heat expansion with changes of temperatures. The composite PA pipe combines the advantages of both metal and plastic while avoiding both of their weaknesses.

 

 

 

PEX Material

PEX (Cross-linked Polyethylene) is a high performance and flexible polymer pipe. It is formed by chemically bonding individual polyethylene molecules in order to enhance the physical properties and to improve the performance of the original base resin in higher temperature and pressure conditions.

 

 
 

 

 

Smooth Surface for Higher Flow Rate

Base on “Hazen-Williams” equation,  PEX pipes have smoother surface (low roughness coefficient), hence able to increase the flow rate. And in terms of dimensional calculation, use of relatively smaller pipe inner diameter can be considered yet achieving equivalent flow rate.

 

Specifications

Nominal (mm) 16 20 25 32 40 50 63
Inner diameter (mm) 12 16 20 26 32 41 51
Wall thickness (mm) 2.0 2.0 2.5 3.0 4.0 4.5 6.0
Aluminium thickness (mm) 0.20 0.24 0.30 0.70 0.70 0.70 0.70
Pipe weight (kg/m) 0.125 0.170 0.252 0.390 0.600 0.860 1.320
Internal volume of water (l/m) 0.113 0.201 0.314 0.531 0.960 1.385 2.289
Working temperature (°C)
PE-AL-PEX pipe
A range of - 45°C to 60°C
60°C at 4 Bars / 20°C at 12.5 Bars
Working temperature (°C)
PEX-AL-PEX pipe
A range of - 45°C to 95°C
Peak temperature : 110°C (max duration of 1 hour)
Max working pressure (Bars) 95°C at 4 Bars / 70°C at 10 Bars
Burst pressure (Bars) 80
Min ring strength (N) ≤ 2,000 ≤ 2,400 ≤ 2,400 ≤ 2,650 ≤ 3,200 ≤ 3,500 ≤ 5,200
Thermal conductivity (W/mK) 0.43 (vs copper at 28.0)
Coefficient of thermal expansion (mm/m*K) 0.025 - 0.030
Surface roughness of inner pipe 0.007mm (7um)
Oxygen barrier (%) 100
Bending radius (free bend) ≥ 6x of pipe outer diameter
Bending radius (with tool) ≥ 3.5x of pipe outer diameter
Working life-span > 50 years
Length in coil (m) 100 100 100 50 50 50 50
Length in straight tube (m) - - - - 5 5 5
Equivalent to copper pipe sizes (mm) 15 18 22 28 35 42 54
Equivalent to stainless steel pipe sizes (inch) 3/8" 1/2" 3/4" 1" 1 1/4" 1 1/2" 2"
Equivalent to PPR (PN20) pipe sizes (mm) 20 25 32 40 50 63 75

 

 
 
PE(X)-AL-PE(X)
< PVC < PB , PPR , HDPE
 

 

Main Applications

Tapping - Communication Piping
 
 
Water Heating Piping System