December 2019

Environment and Safety

How changes to functional safety standards can optimize fire and gas detection

ANSI/ISA-84 is one of the most influential standards in functional safety and has been a driver for instrumented process safety improvements over the last 20 yr. It is a comprehensive norm covering a wide range of aspects related to functional safety in process industries, including the entire life cycle of designing, implementing and operating safety systems.

Naranjo, E., Emerson Automation Solutions

ANSI/ISA-84 is one of the most influential standards in functional safety and has been a driver for instrumented process safety improvements over the last 20 yr. It is a comprehensive norm covering a wide range of aspects related to functional safety in process industries, including the entire life cycle of designing, implementing and operating safety systems. Originally released in 1996, it was expanded, updated and harmonized with IEC 61511 in 2004, which is its current version. It has three parts: Part 1: Framework, Definitions, System, Hardware and Software Requirements Part 2: Guidelines for the Application of ANSI/ISA-84.00.01-2004 Part 1—Informative Part 3: Guidance for the Dete

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