Description of Steelflex Pipe Systems

Steel is the material traditionally used for pipes in pre-insulated district heating systems, and is able to withstand high temperatures and pressures. This makes Vital Energi SteelFlex ideal for the pipe runs used in most district heating networks.

An aluminium diffusion barrier placed between the PUR insulation and the outer casing ensures good insulation properties – lambda 0.022 W/mK. This makes sure of consistently high heat retention throughout the service life of the pipe.

Vital Energi Flexible SteelFlex pipe systems are advantageous for house connections in district heating installations and secondary networks. CuFlex is also used for distribution of both hot and cold domestic water systems.

SteelFlex pipes can be operated up to 120°C and the maximum working pressure is 25bar.

SteelFlex flexible pipe systems are available both as single and twin pipe solutions.

Solution detail
Flexible PipeDimension MMTemp Range MaxLeak Detection SystemOperating PressureDiffusion BarrierSeries of Insulation ThicknessLambda Value W/mK
Steel20 to 28

0°C to 120°C

Yes25 barYes1 & 20.022

Applications Of Traditional Single Steel

  • low-temperature
    Low Temperature Hot Water (LTHW)
  • medium temperature
    Medium Temperature Hot Water (MTHW)
  • cooling

Key Benefits

  • Reduction in the number of joints needed through the availability of long lengths
  • Reduction in the number of joints needed through the option of Twin Pipe
  • Reduction in the number of bends/fittings needed as the flexibility allows the piping to follow the best and easiest path
  • Reduction of waste as pipe can be cut to measure
  • Reduction of excavation costs as pipes can be laid on top of each other and/or in very narrow trenches
  • Fully welded system
  • Leak Detection System
  • No-dig methods (or boring) can be applied
  • Fully compliant with CIBSE CHPA Heat Networks Code of Practice
  • Request Steelflex - Flexible Steel Pipe Systems document