大口径管道焊缝返修操作

摘要

This paper dedicates to introduce the upward feeding welding repairing technique by the cellulose electrode E5015.According to how to identify the defect types,location,size and depth as well as grinding the seams to qualified groove by grinding machines, this paper states the repairing critical operations, and the technical requirements that the defects which are not easy to identify can be checked by the filras.This paper also presents the welding process parameters and operating methods for the typical welding positions by the 3,6 and 12 in details,and points out the certain conditions for repairing the seams only once,which will be the significant guideline for the similar repairing operations.%介绍了纤维素焊条上向焊+E5015焊条填充盖面返修工艺.从如何正确判断缺陷的种类、位置、尺寸和深度以及如何使用磨光机打磨焊道、形成合格的返修凹槽等方面介绍此类焊缝的返修操作要点,同时对于不易判断深度的缺陷提出了查看底片等技术要求,并详细介绍3、6和12点等典型焊接位置的工艺参数和操作要领,指出确保管道焊缝返修一次合格应具备的条件,对返修同类焊缝具有一定的参考价值.