EN 253:2009 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 (Incorporates Amendment A1: 2013)
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 ℃ and occasionally with a peak temperature up to 140 ℃. The estimation of expected thermal life with continuous operation at various temperatures is outlined in Annex B.
EN 253:2009 history
2023EN 253:2019+A1:2023 District heating pipes - Bonded single pipe systems for directly buried hot water networks - Factory made pipe assembly of steel service pipe, polyurethane thermal insulation and a casing of polyethylene
2015EN 253:2009+A2:2015 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
2013EN 253:2009+A1:2013 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
2009EN 253:2009 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 (Incorporates Amendment A1: 2013)
2003EN 253:2003 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: 2006
1994EN 253:1994 Preinsulated Bonded Pipe Systems for Underground Hot Water Networks - Pipe Assembly of Steel Service Pipes, Polyurethane Thermal Insulation and Outer Casing of Polyethylene
1990EN 253:1990 Preinsulated bonded pipe systems for underground hot water networks; pipe assembly of steel service pipes, polyurethane thermal insulation and outer casing of high density polyethylene