压力容器插入式大口径管座马鞍形焊缝,为容器上最重要的焊接部分。采用埋弧自动焊在国内尚属首次,体现了一定的先进水平。本文介绍的焊接工艺特点、规范选择及实际应用情况是具有较大参考价值的。通过实践证明,自动焊机运行正常,焊缝质量良好,能提高劳动生产率,降低成本,为实现连接管全自动焊开辟了新的途径。 Pressure vessel plug-in large-diameter saddle-shaped base weld, the container for the most important part of the welding. The use of submerged arc welding in the country for the first time, reflecting a certain degree of advanced level. This article describes the welding process characteristics, specifications and practical application of the situation is of great reference value. The practice proves that the automatic welding machine runs normally and the quality of the weld is good, which can improve the labor productivity and reduce the cost, opening up a new way for the automatic welding of connecting pipes.