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BS EN 448-2009
Fernw?rmerohre. Werkm??ig ged?mmte Verbundmantelrohrsysteme für direkt erdverlegte Fernw?rmenetze. Verbundformstücke,bestehend aus Stahl-Mediumrohr,Polyurethan-W?rmed?mmung und Au?enmantel aus Polyethylen 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 Tuyaux de chauffage urbain. Systèmes bloqués de tuyaux préisolés pour des réseaux d'eau cha
适用范围：This European Standard specifies requirements and test methods for fittings of prefabricated thermally insulatedpipe-in-pipe assemblies comprising a steel service fitting from DN 20 to DN 1200, rigid polyurethane foaminsulation and an outer casing of polyethylene for use in directly buried hot water networks with preinsulated pipeassemblies in accordance with EN 253.This European Standard covers the following fittings: bends, T-pieces, reducers, single use compensators andanchors.This European Standard applies only to insulated fitting assemblies and single use compensators for continuousoperation with hot water at various temperatures in accordance with EN 253:2009, Clause 1.This European Standard applies to fitting assemblies with a minimum design pressure of 16 bar (overpressure)complying with EN 13941.Guidelines for quality inspection are given in Annex A of this European Standard.Procedures for PE-welding are given in Annex B of this European Standard.NOTE This European Standard does not include rules for calculation of loads and stresses.
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