Project Synopsis
Selection of Safety Integrity Levels (SILs) within a refining or petrochemical process Safety Instrumented System (SIS). Incorporation of these SILs into the clients PSM/RMP program.
Project Summary
SAFETY INTEGRITY LEVEL (SIL) SELECTION ANALYSIS
FOR SAFETY INSTRUMENTED SYSTEMS (SISs) OF
REFINERY AND PETROCHEMICAL PROCESSES
Typical Project Description
On numerous occasions, Process Engineering Associates, LLC (PROCESS) has provided engineers experienced in process safety, risk management, and SIL selection who were part of SIL selection analysis teams for the clients. The teams assigned SILs to the safety instrumented functions of specific safety instrumented systems of petroleum refining and petrochemical processes to help the clients incorporate the SIL selection requirements of the American National Standards Institute (ANSI)/Instrumentation, Systems, and Automation Society (ISA) standard 84.00.01 – 2004 into their Process Safety and Risk Management Program. Various methodologies were employed for the SIL selection analyses, including layer of protection analysis (LOPA) and a qualitative risk ranking methodology.
PROCESS performed SIL selection analyses for the safety instrumented systems on the following specific processes:
- Fluidized Catalytic Cracking (FCC)/Gas Concentration (Gas Con) Units
- Amine Treaters
- Naphtha Hydrotreating Unit
- Gas Oil Hydrotreating Unit
- Ultra Low Sulfur Diesel (ULSD) Unit
- Sulfur Recovery Units
- Tailgas Treating Units
- Sour Water Stripper Unit
- Pentane/Hexane Isomerization Unit
- Delayed Coker Unit
- Crude Unit
Industry Type
- Petroleum Refining
- Petrochemicals
Utilized Skills
- SIL selection analyses
- Layer of protection analysis (LOPA)
- Qualitative risk ranking
- Process Safety Management program administration
- Risk Management Plan program administration
- Regulatory requirement knowledge
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