摘要
Abstract
Aiming at the residual magnet phenomenon after SAWH pipe manufacture, it analyzed the causes of residual magnet and the effect of residual Magnet on X-ray industrial TV inspection and on-site butt welding construction. Some measures to reduce and eliminate residual magnet were put forward from welded pipe production process and on-site welding construction , including wraping welding cable on pipe end, placing magnet on pipe end, reverse distribution residual magnet (homopolarity method)etc. Finally, it analyzed and compared the advantages and disadvantages of the above several demagnetization methods for SAWH pipe on-site butt welding, and provided the optimized proposal of residual magnet comprehensive control and demagnetization.关键词
焊管/螺旋埋弧焊管/剩磁/控制措施Key words
welded pipe/SAWH pipe/residual magnet/control measures分类
能源科技
