DIN EN 253
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; German version EN 253:2009+A2:2015
Fernwärmerohre - Werkmäßig gedämmte Verbundmantelrohrsysteme für direkt erdverlegte Fernwärmenetze - Verbund-Rohrsystem, bestehend aus Stahl-Mediumrohr, Polyurethan-Wärmedämmung und Außenmantel aus Polyethylen; Deutsche Fassung EN 253:2009+A2:2015
Overview
This European Standard specifies requirements and test methods for straight lengths of factory made thermally insulated pipe-in- pipe systems for directly buried hot water networks consisting of a steel service pipe from DN 15 to DN 1200 with rigid polyurethane foam thermal insulation and a casing of polyethylene. The pipe assembly may also include the following additional elements: measuring wires, spacers and diffusion barriers. This standard applies only to thermally insulated composite pipe systems for continuous operation with hot water at different operating temperatures of up to 120 °C and occasionally occurring peak temperatures of up to 140 °C. The estimation of the expected thermal lifetime for continuous operation at different operating temperatures is explained in Annex B.
Document: references other documents
Document: referenced in other documents
Responsible national committee
NA 041-01-12 AA - District heating and cooling systems (SpA CEN/TC 107 & ISO/TC 341)
