METHOD OF RELIEVING RESIDUAL WELD STRESS IN PIPE WIELDED BUTT JOINTS

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to ultrasound processing of pipeline welded butt joints. Proposed method comprises ultrasound shock-wave processing of pipe inner wall butt joints in the zone of root seam to depth of 30 to 80 mm.;EFFECT: reduced residual stress.;5 dwg