The Application of Functional Safety Standards on the Safety Management of a Chemical Process Tank

Abstract:

This paper describes a systematic way to apply the functional safety standards IEC 61508 and IEC 61511 on the safety management of a chemical process tank. After a short introduction of the basic principle of the functional safety philosophy the risk based determination of the safety integrity level (SIL) for a special liquid tank application is given. Then a safety instrumented system (SIS) suitable to the SIL-level 2 has been designed to fulfill the qualitative and quantitative requirements in the safety standards. The experience gained can be seen as a guidance for process and I&C engineers in industrial practice.

• Periodical: Applied Mechanics and Materials (Volumes 130-134)
• Pages: 1590-1595
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.130-134.1590
• Online since: October 2011
• Authors: Yan Li Zhang, Chun Lei Gu, Yong Jian Ding
• Keywords: Fault Tolerance, Functional Safety, Reliability Calculation, Safety Instrumented System

References

[1] IEC(1998+2010), IEC61508, Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems[S], Parts1-7, Geneva: International Electrotechnical Commission.

DOI: 10.3403/03263848

[2] IEC(2003), IEC61511, Functional Safety - Safety Instrumented Systems for the Process Industry Sector [S], Parts1-3, Geneva: International Electrotechnical Commission.

[3] ISA(2004), ANSI/ISA-S84. 01-2004：Application of Safety Instrumented Systems for the Process Industries[S], Research Triangle Park, NC: Instrument Society of America.

[4] CCPS(2001), Layer of Protection Analysis: Simplified Process Risk Assessment[M], New York: American Institute of Chemical Engineers, Center for Chemical Process Safety.