FIELD: technological processes.
SUBSTANCE: invention relates to the treatment of metals by pressure and can be used for the manufacture of welded pipes with large diameters. Method includes expanding the pipes with pressure onto their inner surface of individual parts – segments. This deformation for the end sections is carried out simultaneously for the two pipes with the same tools.
EFFECT: improving the pipeline quality by increase in the accuracy at piping connection sections.
3 cl, 7 dwg
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