A five-layer composite design
A PPR-AL Stabi pipe has five distinct layers. Each layer serves a specific function. The layers work together to create a stable pipe. Example: like a sandwich with multiple fillings.
Layer 1: Outer PPR protection
The outer layer is high-quality PPR material. It protects the aluminum from physical damage. It also resists UV exposure and chemicals. A PPR-AL Stabi pipe uses the outer PPR for durability.
Layer 2: Outer adhesive
A thin adhesive layer bonds the outer PPR. It ensures the aluminum stays attached. The adhesive withstands temperature changes. A PPR-AL Stabi pipe depends on this bonding layer.
Layer 3: Aluminum core
The middle layer is perforated aluminum foil. This is the structural reinforcement of the pipe. It reduces thermal expansion significantly. A PPR-AL Stabi pipe has an aluminum core for stability.
Layer 4: Inner adhesive
Another adhesive layer bonds the aluminum. It connects to the inner PPR surface. This prevents delamination during thermal cycling. A PPR-AL Stabi pipe has symmetrical adhesive layers.
Layer 5: Inner PPR layer
The inner layer contacts water directly. It is food-grade PPR for safety. This layer provides smooth flow and hygiene. A PPR-AL Stabi pipe has a clean, non-toxic inner surface.
The aluminum perforation
The aluminum layer is not solid. It has micro-perforations for bonding. Adhesive flows through these holes. A PPR-AL Stabi pipe achieves full lamination via perforation.
Oxygen barrier function
Aluminum is an oxygen diffusion barrier. Oxygen cannot pass through the metal. This protects metal system components. A PPR-AL Stabi pipe is ideal for heating systems.
Thermal expansion reduction
The aluminum layer resists thermal movement. Standard PPR expands 0.15 mm/m°C. Stabi pipe expands only 0.03 mm/m°C. A PPR-AL Stabi pipe offers 5 times less expansion.
Example: underfloor heating system
Pipes are embedded in concrete slabs. Thermal expansion could crack the concrete. PPR-AL Stabi pipes stay stable and safe. Example: a 50-meter loop expands only 15mm instead of 75mm.
Example: exposed overhead pipework
Industrial buildings have visible pipe runs. Standard PPR would sag with hot water. PPR-AL Stabi pipes maintain a straight line. Example: no unsightly droops or loops.
Example: hot water recirculation system
Hotels have long, continuous hot water loops. PPR-AL Stabi pipes keep dimensionally stable. Fewer expansion loops are needed. Example: a compact, efficient system installation.
Final structure summary
PPR-AL Stabi pipes have five layers: outer PPR, outer adhesive, aluminum core, inner adhesive, inner PPR. The aluminum reduces thermal expansion by 75%. It also blocks oxygen diffusion. The adhesives bond all layers together. Perforations allow full lamination. The inner layer is food-grade for safety. This structure makes PPR-AL Stabi pipes ideal for hot water, heating, and exposed installations. Example: a reliable, long-lasting piping solution.
