FIELD: technological processes; pipes.
SUBSTANCE: dimensions and shapes of joined pipe ends are compared, distributed straightening force direction and intensity is defined, pipe ends dimensions and shapes are matched by application of distributed straightening force to pipe walls along its whole diameter. At that distributed straightening force is applied to pipe generatrix in section, length of which is established depending on intensity of distributed straightening force. In part of section that starts from pipe end, intensity of distributed force is established with constant value, and in remaining part it is evenly reduced down to zero.
EFFECT: reduction of wall surface curvature and lower stress in it.
2 dwg
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