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通过安装过程旁站监测和光谱分析检测，安装监督检验人员发现一起超超临界电站锅炉管道焊材错用事故。安装单位和检验人员根据该焊口结构、规格和材质提出了具体的返修措施和充氩工艺。为避免类似事故再次发生，本文对今后高参数特种设备安装提出了应进一步加强管理体系执行，落实技术交底工作和增加资料核查、加强现场监督和提高符合性验证比例的建议。“,”By monitoring the installation process and spectral analysis detection, installation super-visors found a misused consumables accident in the ultra-supercritical pressure boiler pipe. According to the welding structure, size and materials, the installation unit staff and inspectors established the concrete repair measurements and argon-filled process. In order to avoid similar accidents happening again, it is presented in this paper that the installation of special equipments with high parameters should be further supervised by those means, such as the strengthened management system implementation and technical disclosures, the increased information veriifcations, more monitoring and compliance veriifcations.