摘 要：奥氏体不锈钢氧化膜脱落堵塞引起爆管的问题已严重威胁火电厂的运行，作者通过分 析湘潭电厂采纳传统的射线拍片检查和自主研发新型专用无损检测仪对管子进行检测的情况， 突出新型专用检测仪具有检测准确快捷、灵敏度高、对被检测管子无要求的优点。并根据两台 超临界锅炉的检测结果分析了氧化皮堵塞的特点，同时结合奥氏体锅炉管壁温度曲线变化，指 出即使是滑压闷炉缓冷的锅炉也会发生氧化皮堵塞。从强化管理的高度率先提出并实施了将氧 化皮检测纳入“四管”防磨防爆体系，在氧化皮问题上做到“逢停必查”，确保机组运行安全， 为其他电厂处理此问题提供宝贵的实际经验。关键词：氧化皮；奥氏体不锈钢；无损检测；堵塞Investigation for the pipe burst caused by oxide skin stripping off from austenitic stainless steel pipe internal wallbased on the new testerPeng Xin Li Youqing Wang Shuangyong Ren Jianwen Xiangtan Power Generation Co.,Ltd1102Abstract:The problem that pipe burst caused by oxide skin from austenitic stainless steel pipe, whic stripped off from the pipes internal wall and blocked the pipes,has greatly threatened the healthy operoaftipoonwer plants.The author analysed the testingconditionof Xiangtan power plant, whose supercritical boilers were tested by traditional X-ray and the new speci testerself-developebdy Xiangtanpower plant,underlinedthe specialtesterhas advantagesof high sensitiviand no-requiremenfor the teste（pipes,theoperatioiwas alsosimpleand quick then indicatedthe featuresof the oxide skin blockage based on the testingresultsCombined the temperature curve of austenitic boiler pipe, this paper pointed out the boiler pipes would be prob blockedby oxide skineven iftheboilershutdown with slidinpressureln view of strengthening maintenance management, Xiangtan power plant presentedand implemented the measure that integrated oxide skin testing with anti-wear and anti-buTfstuisypiit^^KDcr tested pipes as soon as the units shut...
