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通过对某石化成品油外输管道取样后进行射线检测、超声检测、磁粉检测等方法检测，结合理化性能检测、泄漏处材料金相观察、腐蚀坑内腐蚀产物成分分析等其他方法，对取样管段进行了检测评价。结果表明，该管段发现4处泄漏穿孔及19处相对较明显的点状缺陷；结合管道运行情况进行现场调研以及腐蚀产物分析，确定了该管段失效泄漏产生的原因。“,”Based on the refine d oil export pipeline sampled for ray testing,ultrasonic testing,magnetic particle testing,etc,combined with the physical and chemical properties testing,and material microstructure observation, corrosion pit corrosion product composition analysis and other methods on the pipeline,the pipe section evaluation was examined.The results showed that the pipe leakage faults of 4 perforations and 1 9 relatively obvious point defects were found.Combined with pipeline operation,site investigation and analysis of corrosion products,the failure reasons of pipe leakage were determined.