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BS EN 17878-1:2024

BS EN 17878-1:2024

$142.49

District heating pipes. Factory made flexible pipe systems with a lower temperature profile – Classification, general requirements and test methods

Published By Publication Date Number of Pages
BSI 2024 32
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This document specifies classification, general requirements and test methods for flexible, factory made, buried district heating pipe systems. This document is intended to be used only in conjunction with EN 17878-2 or EN 17878-3, as applicable. This document is applicable to a maximum operating temperature of 80 °C and a maximum operating design pressure up to 1,0 MPa. The pipe systems are designed for a service life of at least 50 years. For pipe systems with plastic service pipes, the respective temperature profiles are specified in EN 17878-2:2024 and EN 17878-3:2024. For the transport of other liquids, for example potable water, additional requirements can be applicable.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols, indices and abbreviations
12 4 Classification
5 Design requirements
5.1 Thermal insulation properties
5.2 Bending test
5.2.1 Flexibility
13 5.2.2 Ovality
5.2.3 Cracks
5.3 Resistance to external load
5.3.1 Ring stiffness
5.3.2 Impact resistance
5.4 Thermal insulation
5.4.1 Compressive creep
5.4.2 Water absorption at elevated temperatures
14 5.4.3 Density of thermal insulation
5.4.3.1 General
5.4.3.2 Bonded system
5.4.3.3 Non bonded system
5.5 Casing
5.5.1 UV stability
5.5.2 Thermal stability of the material
5.5.3 Stress crack resistance of the material
5.5.4 Use of rework material
5.6 Surveillance systems
6 Test methods
6.1 General
15 6.2 Bending test
6.2.1 Flexibility
16 6.2.2 Ovality test
6.2.3 Cracks in the thermal insulation
17 6.3 Compressive creep
6.3.1 General
6.3.2 Principles of testing
6.3.3 Test apparatus
18 6.3.4 Test specimens
6.3.4.1 Dimensions
19 6.3.4.2 Origin and count of test specimens
6.3.4.3 Preparation of the specimen
6.3.5 Test procedure
6.3.6 Test force and expression of results
20 7 Marking
7.1 General marking aspects
21 7.2 Minimum marking information
8 Manufacturer’s information
22 Annex A (normative)Thermal conductivity of factory made pipes – 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 apparatus
23 A.3.3 Dimensions
A.3.4 Heater pipe surface temperature
A.4 Test specimen
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 and dimension measurement
25 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
26 A.5.8 Test period and stability
A.6 Calculations – Thermal conductivity
28 Annex B (informative)Determination of design values for the radial thermal resistance
29 Annex C (informative)Guidelines for inspection and testing

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BS EN 17878-1:2024
$142.49