SSH EN 448:2005

Tubat për ngrohje të përqëndruar - Sistemet e tubave të paraizoluar me ngjitje për rrjeta uji të nxehtë të futura drejtpërdrejtë nën tokë - Pajiset bashkuese të tubave prej çeliku të zakonshëm. termoizlimi prej poliu

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

Scope

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 prEN 253.
This standard covers the following fittings: Bends, T-pieces, reducers and anchors.
This standard applies only to insulated fitting assemblies for continuous operation with hot water at various temperatures in accordance with clause 1 of prEN 253:2002.
Guidelines for quality inspection are given in annex A of this standard.
Procedures for PE-welding are given in annex B of this standard.
NOTE This standard does not include rules for calculation of loads and stresses.

Related directives

Directives related to this standards.