某电厂省煤器管子对接焊缝泄漏原因分析  

The Cause Analysis of Leakage of Butt weld of economizer pipe in a power plant

作　　者：邵栗琦 冯起 SHAO Liqi;FENG Qi(Harbin Boiler Company Limited,Harbin 150046,China)

机构地区：[1]哈尔滨锅炉厂有限责任公司,黑龙江哈尔滨150046

出　　处：《锅炉制造》2023年第3期43-45,共3页Boiler Manufacturing

摘　　要：某电厂省煤器管对接焊缝发生泄漏。对泄漏样管取样进行化学成分分析、金相分析、硬度分析、宏观检查。根据分析结果,样管泄漏的直接原因为样管内壁焊缝存在气孔类原始焊接缺陷。锅炉运行过程中,气孔受运行压力影响向外壁扩展,最终贯穿管壁导致样管泄漏。The butt weld of economizer pipe in a power plant leaked.The leakage sample tube shall be sampled for chemical composition analysis,metallographic analysis,hardness analysis and macro inspection.According to the analysis results,the direct cause of the sample tube leakage is the original welding defects such as pores in the weld on the inner wall of the sample tube.During the operation of the boiler,the air hole expands to the outer wall under the influence of the operating pressure,and finally penetrates the pipe wall,resulting in the leakage of the sample pipe.

关 键 词：省煤器 对接焊缝 气孔 焊接缺陷 

分 类 号：TK228[动力工程及工程热物理—动力机械及工程]