FIELD: manufacturing heat-insulated pipes.
SUBSTANCE: method comprises manufacturing pipe that is composed of one or several inner pipes, outer pipe that is mounted concentrically and with a spaced relation to the inner pipe, and insulation that is mounted within the space between the inner and outer pipes and is made on the basis of polyurethane or polyisocyanurate foams.
EFFECT: reduced cost and improved heat insulation.
5 cl, 2 dwg
