PEX-AL-PEX
Cross-linked PE inner and outer layers bonded to an aluminium core.
Overview
PEX-AL-PEX Multilayer Pipe
Five-layer pipe combining cross-linked polyethylene with an aluminium barrier layer: oxygen-tight, form-stable and suited to hot water. Used for floor heating, radiator connection and hot & cold water supply.
- Outer layer · PE-XProtects the pipe and carries the marking and colour.
- Adhesive layerBonds plastic to aluminium so the layers never separate.
- Aluminium layerBlocks oxygen, holds the bent shape and takes the pressure.
- Adhesive layerBonds the aluminium to the inner pipe.
- Inner layer · PE-XSmooth, corrosion-free and hygienic in contact with water.
Sizes
Every catalogue size
Open a model for its own page. Custom wall and aluminium thickness are made to your drawing.
| Model | OD × wall (mm) | Al layer (mm) | Pressure | Packing | Inquiry |
|---|---|---|---|---|---|
| SL-PXP-1620 | 16 × 2.0 | 0.20 | 10 bar | 100 / 200 m coils | |
| SL-PXP-2020 | 20 × 2.0 | 0.25 | 10 bar | 100 / 200 m coils | |
| SL-PXP-2525 | 25 × 2.5 | 0.30 | 10 bar | 50 / 100 m coils | |
| SL-PXP-2630 | 26 × 3.0 | 0.30 | 10 bar | 50 / 100 m coils | |
| SL-PXP-3230 | 32 × 3.0 | 0.40 | 10 bar | 50 / 100 m coils | |
| SL-PXP-4035 | 40 × 3.5 | 0.50 | 10 bar | 4 m / 5.8 m straight lengths | |
| SL-PXP-5040 | 50 × 4.0 | 0.50 | 10 bar | 4 m / 5.8 m straight lengths | |
| SL-PXP-6345 | 63 × 4.5 | 0.60 | 10 bar | 4 m / 5.8 m straight lengths | |
| SL-PXP-7550 | 75 × 5.0 | 0.70 | 10 bar | 4 m / 5.8 m straight lengths | |
| Butt-welded models (suffix -B, no overlap seam in the aluminium) | |||||
| SL-PXP-1620-B | 16 × 2.0 | 0.20 | 10 bar | 100 / 200 m coils | |
| SL-PXP-2020-B | 20 × 2.0 | 0.25 | 10 bar | 100 / 200 m coils | |
| SL-PXP-2525-B | 25 × 2.5 | 0.30 | 10 bar | 50 / 100 m coils | |
| SL-PXP-2630-B | 26 × 3.0 | 0.30 | 10 bar | 50 / 100 m coils | |
| SL-PXP-3230-B | 32 × 3.0 | 0.40 | 10 bar | 50 / 100 m coils | |
Technical data
Performance and installation
- Designed with reference to
- EN ISO 21003 · GB/T 18997.1 / GB/T 18997.2
- Application class
- Class 2 / Class 5 @ 10 bar
- Max. working temperature
- 95 °C
- Short-term max. temperature
- 110 °C
- Nominal pressure
- 10 bar (1.0 MPa)
- Aluminium layer welding
- Overlap-welded; butt-welded models carry -B
- Thermal conductivity
- 0.43 W/(m·K)
- Linear expansion
- 0.025 mm/(m·K)
- Bending radius
- ≥ 5 × OD by hand, ≥ 3 × OD with a bending spring (16–32 mm)
- Colours
- White; other outer colours for OEM orders
- Supply form
- 16–20 mm: 100 / 200 m coils · 25–32 mm: 50 / 100 m coils · 40–75 mm: 4 m / 5.8 m straight lengths
- Joining
- Press or compression fittings for multilayer pipe (16–32 mm); press fittings for 40–75 mm
FAQ
Common questions
Do you supply fittings?
We specialize exclusively in manufacturing multilayer composite pipes (coils and straight lengths) and do not supply fittings directly. Pipes use metric OD and wall-thickness specifications, with nominal inner diameters listed on product pages to help you select the corresponding connection system for your market.
What is the difference between overlap-welded and butt-welded?
Overlap-welded aluminium has a narrow overlapping seam; butt-welded aluminium is joined edge to edge, giving an even wall and round profile. Butt-welded models end in -B.
How is the pipe marked?
Each pipe carries the model code, size, production date and batch number, so every length can be traced to its production record.
Tell us what you need.
Sizes, quantities and your market. You get a quotation within 24 hours.