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Conveyance systems of multilayer pipes for the supply of gaseous fuels in buildings for embedded and surface mounted installations. Systems operating at temperatures between -20ºC up to 60ºC used in gas recipient installations in buildings to supply gas at a maximum operating pressure, up to and including 500 kPa (5 bar). Multilayer pipes are made from an outer polymer layer, an intermediate aluminium layer (AL) and an inner PE, PE-RT or PE-X layer.

Tests:

Suitability for use:

• Tensile strength of joints
• Joint compression
• Joint impact
• Thermal cycles in joints
• Repetitive bending

Material properties:

• Determination of the degree of pigment or carbon black dispersion. Compression method
• Determination of carbon black content

Mechanical properties:

• Adherence and cracking by expansion
• Tensile adherence