FIELD: metallurgy.
SUBSTANCE: method includes preparation for welding with blunting on the edges of a pipe blank, pipe moulding, assembly and laser beam welding with an application of a root weld above and weld seam. In preparation for welding pipe blanks at blunting one of its edges inclined beads of metal alloy are fused on at a distance from each other in the ascending direction relative to the direction of movement of the laser beam during welding according to the first embodiment. According to the second embodiment, the inclined beads of metal alloy are fused on downwardly relative to the direction of movement of the laser beam during welding. During the assembly the edges of the pipe blank are compressed, forming inclined channels between them, which ensure the discharge of gases during laser welding of the longitudinal pipe seam.
EFFECT: improving the processability and quality of welded pipe joints.
4 cl, 3 dwg
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