NBN EN 17414-3:2020

District cooling pipes - Factory made flexible pipe systems - Part 3: Non bonded system with plastic service pipes; requirements and test methods


About this standard

German, English and French
Publication date
27 August 2020
ICS Code
23.040.99 (Other pipeline components)

About this training


This document specifies requirements and test methods for factory made thermally insulated non bonded flexible pipe-in-pipe assemblies for directly buried district cooling distribution systems, comprising a service pipe from DN 15 to DN 200 and a casing of polyethylene. The pipe assembly may also include the following additional elements: measuring wires, spacers and diffusion barriers.
This document is intended to be used in conjunction with prEN 17414-1 ).
This document applies only to insulated pipe assemblies, for continuous operation with water at various temperatures (1 to 30) °C and a maximum operation pressure of 25 bar dependent on material specified.
The design is based on an expected service life with continuous operation of a minimum 50 years.
This document does not cover surveillance systems.
NOTE For the transport of other liquids, for example potable water, additional requirements may be applicable.