BS EN 17414-1:2020
$167.15
District cooling pipes. Factory made flexible pipe system – Classification, general requirements and test methods
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 38 |
This document specifies requirements and test methods for factory made thermally insulated flexible pipe-in-pipe assemblies for directly buried district cooling distribution systems, comprising a service pipe and a casing of polyethylene. The pipe assembly can also include the following additional elements: measuring wires, spacers and diffusion barriers.
This document is intended to be used in conjunction with EN 17414?2 or EN 17414?3.
This document applies only to insulated pipe assemblies, for continuous operation with water at various temperatures (1 to 30) °C and a maximum operation pressure of 25 bar dependent on material specified.
The design is based on an expected service life with continuous operation of a minimum 50 years. For pipe systems with plastic service pipes, the respective temperature profiles are defined in EN 17414?2 and EN 17414?3.
For the transport of other liquids, for example potable water, additional requirements could be applicable.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions |
| 9 | 4 Symbols, indices and abbreviations |
| 13 | 5 Classification 6 Requirements 6.1 Thermal insulation properties |
| 14 | 6.2 Bending properties 6.2.1 Flexibility 6.2.2 Ovality 6.2.3 Cracks 6.2.4 Centre line deviation of service pipe 6.3 Resistance to external load 6.3.1 Ring stiffness 6.3.2 Impact resistance |
| 15 | 6.4 Thermal insulation 6.4.1 Compressive creep 6.4.2 Water absorption at elevated temperatures 6.4.3 Density of thermal insulation 6.4.3.1 Bonded System 6.4.3.2 Non bonded system 6.5 Casing 6.5.1 UV stability 6.5.2 Thermal stability of the material |
| 16 | 6.5.3 Stress crack resistance of the material 6.5.4 Use of rework material 6.6 Surveillance systems 7 Test methods 7.1 General 7.2 Bending test 7.2.1 Flexibility |
| 18 | 7.2.2 Ovality test 7.2.3 Cracks in the thermal insulation |
| 19 | 7.2.4 Deviation of service pipe |
| 20 | 7.3 Compressive creep 7.3.1 General 7.3.2 Principles of testing 7.3.3 Test apparatus |
| 21 | 7.3.4 Test specimen |
| 22 | 7.3.5 Test procedure 7.3.6 Test force and expression of results |
| 23 | 8 Marking 8.1 General marking aspects 8.2 Minimum marking information |
| 24 | 9 Manufacturer’s information |
| 25 | Annex A (normative)Thermal conductivity of factory made pipe assemblies – Test procedure A.1 General A.2 Requirements A.2.1 Test specimen A.2.2 Operating temperature A.2.3 Types of apparatus A.3 Apparatus A.3.1 Guarded end apparatus A.3.2 Calibrated end or calculated end apparatus |
| 26 | A.3.3 Dimensions A.3.4 Heater pipe surface temperature A.4 Test specimens A.4.1 Conditioning A.4.2 Surface temperature measurement A.4.3 Location of temperature sensors A.5 Procedure A.5.1 Test length A.5.2 Diameter measurement |
| 28 | A.5.3 Thickness of casing A.5.4 Ambient requirements A.5.5 Test pipe temperature A.5.6 Power supply A.5.7 Axial heat loss A.5.8 Test period and stability A.6 Calculations – Thermal conductivity |
| 31 | Annex B (normative)Calculation of the heat flow from the medium to the ambient of factory made buried district cooling pipes B.1 General B.2 Calculations B.2.1 Single pipe system (SPS) |
| 32 | B.2.2 Radial thermal resistance of the surrounding soil B.3 Declared values of the radial thermal resistance of buried pipe systems |
| 33 | Annex C (informative)Determination of design values for the radial thermal resistance |
| 34 | Annex D (informative)Guidelines for testing |
