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BS EN 17415-3:2021

BS EN 17415-3:2021

$167.15

District cooling pipes. Bonded single pipe systems for directly buried cold water networks – Factory made steel valve assembly for steel or plastic service pipe, polyurethane thermal insulation and a casing of polyethylene

Published By Publication Date Number of Pages
BSI 2021 36
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This document specifies requirements, design and test methods for factory made thermally insulated bonded valve assemblies for directly buried district cooling distribution systems, comprising a steel valve from DN 15 to DN 1 200, rigid polyurethane foam insulation and a casing of polyethylene.

The valve assembly can also include the following additional elements: measuring wires, spacers and diffusion barriers.

This document applies only to insulated valve assemblies, for continuous operation with water at various temperatures (1 to 30) °C and a maximum operation pressure of 25 bar.

The design is based on an expected service life with continuous operation of a minimum 50 years.

NOTE

An expected service life of 50 years presupposes that treated water is used.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 European foreword
7 Introduction
8 1 Scope
2 Normative references
9 3 Terms and definitions
4 Requirements
4.1 Pressure ratings for valves
4.1.1 General
4.1.2 Valves without indicated flow direction
4.2 Service temperatures for valves
4.3 Steel parts
4.3.1 General
10 4.3.2 Valve body
4.3.3 Valve extension pipe quality
4.3.4 Valve extension pipe ends
4.3.5 Welding of steel parts
4.3.6 Internal valve parts
11 4.4 Casing
4.4.1 General
4.4.2 Requirements for polyethylene welding
4.4.3 Diameter and wall thickness of the casing
4.5 Polyurethane (PUR) foam thermal insulation
4.5.1 General
4.5.2 Minimum thickness of thermal insulation
4.6 Valve assembly
4.6.1 Ends of valve assembly
12 4.6.2 End of stem construction
4.6.3 Main dimensions of the valve assembly
13 4.6.4 Installation of measuring elements
4.7 Requirements for effective operation and maintenance
4.8 Resistance to axial forces and bending moments
5 Testing, test methods and test requirements
5.1 General
5.2 Test specimens
5.2.1 General
14 5.2.2 Test specimens for type testing steel parts of valve
5.2.3 Test specimens from casings and thermal insulation
5.3 Steel parts
5.3.1 General
5.3.2 Type test of the steel parts
17 5.3.3 Production testing of valves
18 5.4 Casing
5.4.1 General
5.4.2 Leak-tightness of the welded casing
5.5 Polyurethane (PUR) foam thermal insulation
5.6 Valve assembly
5.7 Surveillance system
19 6 Marking
6.1 General
6.2 Steel valve
6.3 Casing
6.4 Valve assembly
7 Installation and maintenance
21 Annex A (informative) Guidelines for inspection and testing
23 Annex B (normative) Resistance to axial force and bending moment
28 Annex C (normative) Resistance to bending forces
33 Annex D (informative) Waste treatment and recycling
34 Bibliography

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BS EN 17415-3:2021
$167.15