AP1000核电厂波动管窄间隙自动焊关键工艺

Critical technology of narrow gap automatic welding for AP1000 nuclear power station surge line pipe

窄间隙自动焊工艺在核电建设工程中应用越来越广泛,特别是反应堆冷却剂系统的大径厚壁管道,这类管道对安装精度和焊缝质量要求较高。AP1000核电厂波动管焊接控制关键是焊缝质量和收缩变形,焊接工艺顺序和收缩量监测是波动管整个焊接过程的重点部分,也是控制焊缝质量的细节部分。通过整个焊接工艺过程的优异表现可以看出,可视化操作便捷、焊接状态稳定、焊缝质量可靠是窄间隙自动焊工艺的主要特点。窄间隙自动焊工艺在波动管焊接上应用效果良好,其应用范围将不断扩大。

Narrow gap automatic welding technology was more and more widely applied in nuclear power construction projects, especially the reactor coolant system large diameter pipes with thick walls which require high installation accuracy and welding quality. The keys to surge line pipe welding control of AP1000 nuclear power station were welding quality and contraction deformation. Welding technology sequence and contraction monitoring were the critical part in the whole welding technology, also the details to control the welding quality. The excellent performance displayed in the whole technology indicated that narrow gap automatic welding technology featureed visual operation convenience, stable performance, reliable quality. Narrow gap automatic welding process worked well on surge line pipe and would be used more and more widely.