For thermal insulation of the pipeline (straight section and arc in) and heat exchanger in heating networks sending a heat carrier with a continuous temperature up to +135 C. For thermal insulation of the pipeline in and heating equipment located in buildings (heating nodes, boiler rooms, heating plants, etc. ) or heating ducts. For insulating the pipeline in and equipment outside buildings, i.e. above ground in an additional cover. Heat-insulating cover made of rigid PUR foam in a PVC foil cover.