Application of ISA S84,01 to SIS in the Chemical and Petrochemical Industries

The Kellogg Brown & Root Company (KBR) has created a Safety Guide for Safety Instrumented Systems (SIS). This guide defines what must be addressed in designing a safety system, and incorporates the application of ISA S84.01. It provides a way to perform a quantitative analysis for verification of the SIL values. The life cycle process is presented. The documentation is defined, and some forms are provided. This presentation reviews each step in design of the SIS starting with management commitment. The actions that must be undertaken to apply ISA S84.01 are discussed. The components of the Safety Guide, specific forms, safety reviews, and SIL calculations are identified.