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对苯乙烯/环氧丙烷装置进行腐蚀回路划分,并将腐蚀回路中的压力管道按照管径、材质及用途等因素划分为不同的组别后进行RBI分析。根据风险评估结果,结合压力管道的使用情况、失效机理及剩余使用寿命等确定下一个检验周期和检验策略。以腐蚀回路中的组别作为检验单元,根据其失效可能性及风险等级确定各检验单元的检验比例和检验方法进行在线检验。结果表明:基于RBI分析结果的压力管道在线抽检方法可以验证风险评估的结果,同时还可以满足使用单位对管道的风险控制要求。
The styrene / propylene oxide plant was divided into corrosion circuits, and the pressure pipes in the corrosion circuit were divided into different groups according to the pipe diameter, material and use, and then RBI analysis was conducted. According to the results of the risk assessment, the next inspection cycle and inspection strategy are determined according to the pressure piping usage, failure mechanism and remaining service life. Taking the groups in the corrosion circuit as the inspection unit, the inspection ratio and the inspection method of each inspection unit are determined according to the possibility of failure and the risk level to carry out on-line inspection. The results show that the on-line sampling method of pressure pipeline based on RBI analysis can verify the result of risk assessment and meet the risk control requirements of pipeline users.