TUYAU A AILETTES

摘要

The production of ribbed heating pipes and ribbed pipe units in which ribs consisting of plates of sheet metal which are provided with recesses of a size and shape in accordance with that of the outer surface of the core pipe or pipes are applied tightly upon the latter so as to project radially therefrom. The edges of these recesses in the rib plates are additionally provided with grooves. A metal, for example, aluminum, is then cast in a suitable mold between the adjacent rib plates so as to form jacket sections around the core pipe in which the rib plates are embedded. This metal also penetrates through and fills out the grooves in the edges of the apertures of the rib plates and thereby connects the adjacent jacket sections to each other.