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DIN EN 253

2015 Edition, December 2015

Complete Document

District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Pipe assembly of steel service pipe, polyurethane thermal insulation and outer casing of polyethylene (includes Amendment A2:2015)



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Product Details:

  • Revision: 2015 Edition, December 2015
  • Published Date: December 2015
  • Status: Active, Most Current
  • Document Language: English
  • Published By: Deutsches Institut fur Normung E.V. (DIN)
  • Page Count: 55
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This European Standard specifies requirements and test methods for straight lengths of prefabricated thermally insulated pipe-in-pipe assemblies for directly buried hot water networks, comprising a steel service pipe from DN 15 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene. The pipe assembly may also include the following additional elements: measuring wires, spacers and diffusion barriers.

This standard applies only to insulated pipe assemblies, for continuous operation with hot water at various temperatures up to 120 °C and occasionally with a peak temperature up to 140 °C.

The estimation of expected thermal life with continuous operation at various temperatures is outlined in Annex B