紧急切断阀部分行程测试功能的实现方式与适用性分析

Implementation Methods and Applicability Analysis for the Partial Stroke Test Function of the Emergency Shutdown Valve

随着石油化工行业安全意识的不断增强,针对一些重大风险源的联锁评估的要求也不断提高,在项目SIL验证阶段出现结果不满足SIL定级要求的情况时有发生。为避免增加类似以降低SIL评估等级为目标的额外独立保护层的高成本方案,提出了紧急切断阀部分行程测试作为一种缩短检测周期、提高检测覆盖率的有效手段。介绍了紧急切断部分行程测试功能的由来以及其具体要求,列举了不同形式的实现方式以及现有的一些产品,并在实际应用层面进行了详细分析,并从经济性、可用性、安全性等方面进行了全面比较,推荐了成本适中、适用性最广的气路设计类的测试解决方案。

With the continuous enhancement of petrochemical industry safety awareness,the requirements of the interlocking evaluation of some major risk sources is continuously improved.In the SIL verification stage of the project,there are cases where the verification results do not meet the SIL classification requirements.In order to avoid adding high cost scheme of extra independent protective layers to reduce the SIL evaluation level,the emergency shutdown valve partial stroke test is put forward as one efficient means to shorten the detection period and improve the detection coverage.The origin and specific requirements of the partial stroke test function of the emergency shutdown valve are introduced.different implementation methods and some products are described,a detailed analysis is introduced.A comprehensive comparison in terms of economy,availability and security are also made.The test plan of airway design with moderate cost and most wide applicability is recommended.