IMPROVEMENTS TO DOUBLE PIPES FOR MIXED BOILERS, TO THE METHODS OF MANUFACTURING SUCH PIPES AND TO THE CORRESPONDING BOILERS

摘要

Double tube for a mixed boiler, comprising rectilinear segments in which the two sections of pipe are juxtaposed laterally. Each section (A, B) is delimited on the side furthest from the other section by a sheet (1, 7), the two longitudinal edges (2, 3, 8, 9) of which are curved and are welded against the longitudinal edges of an intermediate partition (4) and this intermediate partition has shaped bosses (5), the tops (6) of which are in contact with and joined to said sheets. ……