District heating pipes - Bonded single pipe systems for directly buried hot water networks - Factory made fitting assemblies of steel service pipes@ polyurethane thermal insulation and a casing of polyethylene
This document specifies requirements and test methods for factory made thermally insulated bonded fitting assemblies for hot water networks in accordance with prEN 13941-1@ comprising a steel service fitting@ rigid polyurethane foam insulation and a casing of polyethylene. The fitting assembly may also include the following additional elements: measuring wires@ spacers and diffusion barriers. This document covers the following fitting assemblies: bend@ tee@ reducer@ single use compensator and anchor. This document applies to fitting assemblies with a minimum design pressure of 16 bar (overpressure).