RO
SR EN 253+A2:2016
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
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.
Status :
Withdrawn
Approval date : 3/31/2016
Withdrawal date : 2/28/2020
Number of pages : 54
ICS : 23.040.07 Pipelines and its parts for district heat,23.040.10 Iron and steel pipes
Technical Committee : 302 - Space heating appliances, ventilation and room air conditioner
- Replaces SR EN 253+A1:2013
- Replaced by SR EN 253:2020