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Improving the Safety Instrumented System (SIS) Design Process with Graphic Diagrams

by Keith A. Brumbaugh, PE

The author will present examples of the different types of graphic diagrams, methods in which the diagrams
were utilized, and the benefits that each provided in the implementation of certain phases of an ANSI/ ISA 84
SIS lifecycle project. These diagrams were considered to be valuable process safety information and part of the
final SIS Front End Loading design.

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