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FLEXWELL district heating cable (FHK)


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FHK pipe system

Flexible, endless production, double-walled, monitorable and self-compensating pipe system, -170°C to +150°C, PN 25, DN 25-150. Medium pipe: special steel, heat insulation: PUR


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.

Monitoring system

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

Stability under difficult conditions

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
  • flush-boring process


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.

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Product description, specification texts, accessories, certificates
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» FLEXWELL 200/310-Hamilton, ON / Canada
Project Hamilton/Canada 2017/2018 

PDF Icon   2017 - Kraków, Poland

Horizontal directional Drilling (HDD) with FLEXWELL below the river Mottlau in Gdansk 

Water/heating supply 
The museum boat in the sea harbour at Thalassa was to be supplied with fresh water and heating water from onshore.
Reference project Thalassa
FHK for de-icing 
Zurich Airport: A mix of hot water and glycol is used to de-ice aircraft on the runways in winter.

The history of continuously installed district heating cable 

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Brugg Rohrsystem AG
Industriestrasse 39
CH-5314 Kleindöttingen
Phone: +41 (0) 56 268 78 78
Fax: +41 (0) 56 268 78 79


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