DIN Standards Committee Heating and Ventilation Technology and their Safety
District heating pipes - Design and installation of thermal insulated bonded single and twin pipe systems for directly buried hot water networks - Part 1: Design
Abstract
This document specifies requirements for the design of thermal insulated bonded single and twin pipe systems for directly buried — hot water networks in temperature range 5 (TR 5) according to CEN/TR 18341 for continuous operation with water at various temperatures up to 120 °C and occasionally peak temperatures up to 140 °C for maximum 300 h/a, and maximum internal pressure 2,5 MPa. — temperature range 2 (TR 2) to temperature range 4 (TR 4) — cold water networks in temperature range 1 (TR 1) according to CEN/TR 18341 for continuous operation with water at various temperatures up to 30 °C and occasionally peak temperatures up to 35 °C according to EN 17415-1, and maximum internal pressure 2,5 MPa. Flexible pipe systems according to the EN 15632-1 and EN 15632-4 are not under the scope of this document. This document mainly deals with district heating networks in temperature range 5 (TR 5). Deviations for temperature ranges TR 1 to TR 4 are mentioned in the relevant clauses. The requirements in this part form a unity with those of EN 13941-2. The principles of this document may be applied to thermal insulated pipe systems with pressures higher than 2,5 MPa, provided that special attention is paid to the effects of pressure. Adjacent pipes, not buried, but belonging to the network (e.g. pipes in ducts, valve chambers, road crossings above ground etc.) may be designed and installed according to this document. This document is not applicable for: 1) pumps; 2) heat exchangers; 3) boilers, tanks; 4) systems behind domestic substations. This document presupposes the use of treated water, which by softening, demineralization, de-aeration, adding of chemicals, or otherwise has been treated to effectively prevent internal corrosion and deposits in the pipes. NOTE For further information on water qualities to be used in district heating pipe systems see also bibliographic entry CEN/TR 16911 [1].
Begin
2025-01-21
WI
00107102
Planned document number
DIN EN 13941-1
Project number
04112223
Responsible national committee
NA 041-01-12 AA - District heating and cooling systems (SpA CEN/TC 107 & ISO/TC 341)
Responsible european committee
CEN/TC 107/WG 13 - Preinsulated district heating pipe systems - Design and installation
