在役安全阀基于风险的检验

RBI for pressure relief valves in-service

安全阀作为承压设备一个重要的物理保护屏障,对于保护设备的安全起到至关重要的作用。本文基于风险评估原理,对安全阀的失效模式进行分析,并运用定量RBI方法对安全阀的失效可能性和失效后果进行计算,给出基于风险的安全阀校验周期。通过合理运用安全阀风险评估技术,可在保证其安全运行的基础上满足化工装置长周期运行要求。

Pressure relief valves of pressurized equipment as an important physical barriers, play a crucial role to protect pressure equipment. Based on risk assessment technology, the failure mode of the pressure relief valves is analyzed, and the probability of failure and the consequence of failure for pressure relief valves were assessed by use of quantitative RBI method. The criteria was proposed to determine risk-based inspection interval of pressure relief valves. Through the reasonable application of risk assessment technology for the pressure relief valve, it could meet the long period operation of the petrochemical plants under the condition of ensuring the normal operation of these valves.