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    HeatFlex

    A pre-insulated PE-Xa pipe system for heat networks

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    A highly-efficient, flexible pre-insulated PE-Xa pipe system, HeatFlex is perfect for district heating networks that operate at temperatures up to 95°C and pressures of 6 bar.

    The system’s composite construction comprises of a cross-linked polyethylene (PE-Xa) service pipe encased in a bonded layer of closed-cell PUR foam insulation which is protected by a tough, yet flexible, corrugated LDPE outer casing. Easy to install, with a full range of components and fittings available, the system is supplied in coils of up to 800m in length which minimises the requirement for on-site joints. This helps lower installation costs and the system’s outstanding thermal performance also benefits operational expenditure. The system is available with single and twin service pipe configurations within a single outer casing.

    Application

    Buried district heating networks
    Diameter Range 25 mm to 140 mm (OD) (service pipe) Bespoke: No
    SDR 11 Bespoke: No
    Max Operating Pressure 6 bar
    Lengths Up to 800 m coils Bespoke: Yes
    Compliance / Approvals Pipe system: EN 15632-1/2, EN ISO 15875-2.5, DIN 16892 and DIN 16893
    Approved Fittings & Jointing Techniques

    Axial compression service pipe joints
    Suitability

    New installations
    System extensions
    System replacements
    Jointing Techniques

    Axial compression service pipe joints
    Mechanical joint on outer casing
    Optional heat-shrink casing joint
    Jointing Equipment Axial compression tooling with hydraulic pump (manual or electrically operated), hand tools for service pipe preparation and gas burner for optional heat-shrink casing joint
    Installation Techniques

    Open-cut
    Maximum Temperature (peak):

    95°C
    Thermal Conductivity:

    ≤0.021 W/mK at 50°C
    Service pipe configuration:

    Single and Twin
    Pipe system material:

    Cross-linked polyethylene (PE-Xa) service pipe with EVOH diffusion barrier, PUR insulation and LDPE outer casing
    Pipe system colour:

    Red (service pipe), Black with longitudinal green stripes (outer casing)