Method for removing dents from oil pipe lines

摘要

The dent is drawn outwards by a tractive device suspended in the draw plate and supported on the pipe line. The draw plate is then removed and the undented area is covered with a covering, the edges of which are tightly connected to the pipe wall by a welding seam. A traverse (11) is used with two parallel spaced apart supports (12), the free ends of which are fixed to the pipe line (1) by pipe clamps (13). On the traverse is a lift cylinder (14) with a piston rod (15) fixed between the supports. At its end, the piston rod has a coupling for connection to the draw plate (3).