安全完整性等级验证计算在化工装置中的应用研究

Application Research of Safety Integrity Level Verification Calculation in Chemical Plant

安全完整性等级(SIL)验证计算是安全仪表系统设计中重要的组成部分。介绍了SIL及验证计算方法,结合工程实例对典型的安全回路进行SIL验证计算,将计算结果和安全评估的SIL进行比较,确定回路安全仪表功能满足相应的SIL要求;通过对比IEC 61508-6与ISA-TR84.00.02-2两个标准的计算结果以及不同检测周期对两个标准计算结果的影响,阐述了两个标准的计算特点以及检测周期的选择对验证计算的意义。

Safety integrity level （SIL） verification calculation is an important part in safety instrumented system design. SIL and its calculation methods are introduced. SIL verification calculation for typical safety loop is carried out with actual engineering case. Calculation result is compared with the result of safety evaluation SIL . Corresponding required SIL can be met with loop safety instrument function. By comparing calculation result of IEC 61508-6 and ISA-TR84. 00. 02- 2, as well as influence to calculation result in different proof test intervals, characteristics of above two standards and significance of verified calculation in proof est interval selection are expounded.