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Norm

ÖNORM EN 448

Issue date: 2020 03 15

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 EN 13941-1,...
Valid
This document specifies requirements and test methods for factory made thermally insulated bonded fitting assemblies for hot water networks in accordance with EN 13941-1, comprising a steel service fitting, rigid polyurethane foam thermal insulation and a casing of polyethylene. The fitting assembly could 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 1,6 MPa (overpressure).
ÖNORM EN 448
2020 03 15
District heating pipes - Bonded single pipe systems for directly buried hot water networks - Factory...
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ÖNORM EN 448
2016 01 15
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ÖNORM EN 448
2009 04 01
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ÖNORM EN 448
2003 06 01
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ÖNORM EN 448
1995 04 01
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Norm
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Norm
ISO 6761:1981
Issue date : 1981 10 01
Steel tubes — Preparation of ends of tubes and fittings for welding