METHOD OF MANUFACTURE OF ARTICLES WITH CIRCULAR WELDS Russian patent published in 1997 - IPC

FIELD: mechanical engineering; manufacture of high-pressure reservoirs, bottles and pipe lines with circular welds. SUBSTANCE: edges to be welded are made in form of mating taper surface at angle of inclination of cone generatrices of 10 to 36 deg to plane of cross section perpendicular to pipe axis. Outer taper surface of pipe of larger diameter has larger angle of inclination which exceeds angle of inclination of mated inner taper surface of pipe of lesser diameter. EFFECT: enhanced reliability. 3 dwg, 1 tbl