STEEL PIPES AND FASHIONED PIPES WITH PENOPOLIURETAN HEAT INSULATION WITH PROTECTIVE COATING. This standard applies to steel pipes and fittings with thermal insulation made of polyurethane foam (PU) in a protective sheath: in polyethylene (PE) jacket, designed for underground laying of heat networks (channelless or in non-passable and semi-passable channels), or in steel galvanised (OC) jacket - in passable channels or tunnels, as well as for above-ground laying (hereinafter - insulated pipes and fittings), operating with the following design pa- parameters of the heat carrier (superheated water): working pressure according to the project and temperature not more than 150 eC within the schedule of qualitative-quantitative regulation of heat supply 150 C -70 C
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