January 2001

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HP Automation Safety: SIL verification

Regular readers have a good understanding of the safety life cycle (SLC), one of the fundamental concepts presented in the ANSI/ISA84.01 and IEC61508 functional safety standards. Since ..

Goble, W., exida LLC

Regular readers have a good understanding of the safety life cycle (SLC), one of the fundamental concepts presented in the ANSI/ISA84.01 and IEC61508 functional safety standards. Since OSHA stated that ISA84.01 is "a recognized and generally accepted good engineering practice for SIS," the SLC is getting a lot of attention and many companies have begun implementation. The SLC helps optimize safety instrumented system (SIS) design by matching SIS design to the risk reduction requirements of the process. Potential hazards in a process unit are identified and their risk is analyzed. Risk reduction targets are established in

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