Coolflex Piping

Domestic-Commercial | District Heating |  Coolflex Piping


  • Working Temp: -20°C / +40°C
  • Operating Pressure: 16 bar
  • Available in Uno
  • An energy and cost-effective system for district cooling
  • An insulated pipe system for district cooling, cold water and waste water pipelines with an inner pipe of polyethylene (PE100) and an insulation of CO2 blown polyurethane (PUR)
  • Suitable for operating temperatures from –20 °C to +40 °C* and for pressure up to PN16
  • A system for main lines, distribution lines and house connections in district and local cooling networks for connection to geothermal sources and the insulated transport of cold water

Coolflex Application

Coolflex-20 / + 4016 BarUno

Primary UseCooling
LengthsUp to 780m
SizesDN 20 - 125
JointingPress Fittings & Compression Fittings or Weld
DownloadsDownload Technical Information
Coolflex Application


Flexwell district heating cable ® (FHK) is a pipe system that offers a high level of safety thanks to its double-walled design (with metal inner and outer pipes) and its integrated monitoring system.

Energy efficient

Pipes laid underground with heat insulation can be equipped with operational monitoring systems.
  • to monitor the heat insulation for external moisture
  • to identify leaks due to damage to the outer pipe
  • to identify leaks due to damage to the inner pipe, for conductive media


This pipe - which is laid directly in the ground - has proven its merits in practice for more than 40 years in a wide range of very extreme conditions.
  • difficult pipeline conditions
  • pipes below/inside buildings
  • low clearance/coverage heights
  • culverts
  • installation in protective pipes


Installation times are very short compared to the time required to lay and assemble a conventional double-walled pipe - so the FHK solution is not only technically perfect but also highly cost-effective.


Mechanical connector with external/internal thread or weld end. The screw-on connector compresses a graphite seal to make sure a completely tightness.
  • DN 25 – DN 100, material: special steel/steel
  • Pressure: PN 16


Weldable Connector
  • PE-weldable connector
  • A suitable welding appliance is required
Screwed Connector
  • Simple screwed connector that does not require a special tool
  • Available with external thread, as a pipe coupling, T- joint or in steel with a weld end
Clamp Connector
  • Simple connector using the clamping method