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螺纹锁紧环换热器壳体裂纹成因分析与改进措施

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摘要 针对某厂加氢裂化装置螺纹锁紧环换热器壳体裂纹泄漏问题,通过宏观检查及压力容器检验、金相检验、材质检测、硬度测试、磁粉检测、工艺防腐数据分析,结合实际开停工过程分析失效原因,得出焊缝硬度超标是导致螺纹锁紧环壳体裂纹泄漏主要因素,在NH_(4)HS垢下腐蚀和H_(2)S+H_(2)O腐蚀作用下发生硫化物应力腐蚀开裂(SCC),导致了泄漏失效。
出处 《设备管理与维修》 2022年第17期68-70,共3页 Plant Maintenance Engineering
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