IEC61511标准及在石化行业安全管理中的应用

功能安全的定量评定技术已成为确保石化行业安全生产的重要手段。针对石化行业普遍存在的功能安全问题,笔者以国际电工学会(IEC)专门制定的功能安全评定标准IEC61508及IEC61511为指导,介绍其标准制定的背景、目的、体系结构以及如何利用标准开展石化行业安全联锁系统(Safety Instrumented System,SIS)的安全与误跳车定量分析。通过对SIS开展定量安全评估,可发现联锁功能存在的安全不足与误跳车现象,对于提高我国石化行业安全生产水平具有重要的促进作用,标准中有关寿命周期功能安全管理方法及重要的工程经验也对提高我国石化安全生产水平具有借鉴作用。

IEC61511 Standard and Its Application in Safety Management of Petrochemical Industry

Quantitative assessment for function safety is an important method to ensure work safety in petrochemical industry. Aiming at the general problems of function safety in chemical industry, the author introduces function safety assessment standards IEC61508 and IEC61511 established by IEC (International Electric Committee), describes their background, objectives, system structure, and how to use these standards to quantitatively analyze the safety and automatic mis-stop of Safety Instrumented System (SIS) in petrochemical industry. Conducting quantitative safety assessment for SIS can discover whether there is safety weakness and mis-stop phenomena. This method is helpful to improve the level of work safety in petrochemical industry. The concept of lifecycle management of safety function and good engineering practices mentioned in these standards are also beneficial for the development of our petrochemical industry.