SS-EN-448 District heating pipes - Preinsulated bonded pipe systems for directly buried hot water networks - Fitting assemblies of steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

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This European Standard specifies requirements and test methods for fittings of prefabricated thermally insulated pipe-in-pipe assemblies comprising a steel service fitting from DN 20 to DN 1200, rigid polyurethane foam insulation and an outer casing of polyethylene for use in directly buried hot water networks with preinsulated pipe assemblies in accordance with EN 253. This European Standard covers the following fittings: bend, tee, reducer, single use compensator and anchor. This European Standard applies only to factory made prefabricated fitting assemblies and single use compensators for continuous operation with hot water at various temperatures in accordance with EN 253. This European Standard applies to fitting assemblies with a minimum design pressure of 16 bar (overpressure) complying with EN 13941. This European Standard does not include calculation rules for loads and stresses. The design and installation rules, for the system, are given in EN 13941.

To find similar documents by classification:

23.040.01 (Pipeline components and pipelines in general)

23.040.07 (Pipelines and its parts for district heat)

23.040.40 (Metal fittings)

23.040.45 (Plastics fittings)

23.040.99 (Other pipeline components)

27.010 (Energy and heat transfer engineering in general)

27.220 (Heat recovery. Thermal insulation This group includes standards for general use Thermal insulation of buildings, see 91.120.10)

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Designation Name

SS-EN 448:2015

Revision Level




Publication Date

Nov. 9, 2015



Page Count


International Equivalent

EN 448:2015(IDT)