District cooling pipes - Bonded single pipe systems for directly buried cold water networks - Part 3: Factory made steel valve assembly for steel or plastic service pipe, polyurethane thermal insulation and a casing of polyethylene
NORM herausgegeben am 1.12.2021
Bezeichnung normen: ČSN EN 17415-3
Zeichen: 383386
Katalog-Nummer: 513450
Ausgabedatum normen: 1.12.2021
Zahl der Seiten: 36
Gewicht ca.: 108 g (0.24 Pfund)
Land: Tschechische technische Norm
Kategorie: Technische Normen ČSN
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