Abstract: he characteristics of restart pressure used in the crude oil pipeline shutdown and restart safety assessment were analyzed. It is pointed out that the maximum allowable incident pressure（MAIP）, but not the maximum allowable operation pressure（MAOP）, was more suitable for the safety assessment benchmarks of pipeline shutdown and restart. Referencing the MAIP and basing on the pressure parameters provided in Chinese standards, 1.1 times pipeline internal design pressure, 1.1 times pipe remaining strength and 1.1MAOP were respectively recommended as the safety assessment benchmarks for pipelines with no defects, detected defects and undetected defects. The results obtained in a case of a pipeline with undetected defects show that 1.1MAOP is more reasonable than MAOP as the safety assessment benchmarks of shutdown and restart for crude oil pipeline.

Key words: Crude oil pipeline   ,    , Shutdown and restart   ,    , Safety assessment    ,   ,  Limit-state equation  , Safety assessment benchmark

摘要： 通过分析原油管道停输再启动压力的特点,指出最大允许操作压力(MAOP)并不适合作为管道停输
再启动安全评价基准,最大允许事故压力(MAIP)作为管道停输再启动安全评价基准比较合适。借鉴MAIP的定
义,分别推荐1.1倍管道设计内压力、1.1倍管道剩余强度和1.1MAOP作为无缺陷管道、检测的缺陷管道和未检测
的缺陷管道停输再启动安全评价基准。实例计算表明,1.1MAOP作为未检测缺陷管道停输再启动安全评价基准确
定结果更合理,证明所推荐安全评价基准更合理。

关键词: 原油管道, 停输再启动, 安全评价, 极限状态方程, 安全评价基准