核级截止阀自动焊现场施工质量管理

核电机组的核一级截止阀换型工作涉及大量的管道焊缝焊接,方家山1/2号机组在大修期间采用自动焊工艺成功实施了56台手动截止阀的换型任务。该焊缝质量要求严格,施工工期短,给阀门焊接带来了巨大的挑战。总结项目在现场自动焊施工中的质量控制要点,指出精心的施工和全面的技术交底是确保阀门管道焊接的关键,通过制定合适的作业指导书、技术交底、质量控制措施等手段保证焊接质量,为核电管道自动焊施工提供了参考经验。

Quality control of automatic welding for nuclear grade globe valve on site

The changing type of globe valve for class 1 components of nuclear power unit involves massive pipeline welding. During the overhaul of Fanjiashan nuclear power unit 1 and 2,the automatic welding is used to achieve the changing type of 56 manual globe valves. Due to strict weld quality requirement and short construction period,the changing type of globe valve has become a huge challenge. The quality control points of automatic welding construction on site are summarized,and it is pointed out that elaborate construction and comprehensive technological explanation are key to ensuring valve pipeline welding. For the purpose of the good quality of welding,the reasonable and practical operation guidance,technological explanation and quality control measures are established,which provides valuable experience for automatic welding of pipeline for nuclear power plant.