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September 2004 Vol. 100, No. 9

In This Issue
Instrumentation
Reliability for Safety Instrumented Systems
This article offers a detailed reliability-based methodology for determining the safety integrity level of instrumented systems by providing overpressure protection where arrangements of multiple pressure-relief valves are impractical to implement.
J. Patrick Williams
Safety
Conduct an Effective Incident Investigation
Information that can reveal the root cause of an incident resides in many places — within the plant or process unit, in control rooms and offices, and even in witnesses’ minds. Here’s how to find the data and conduct effective witness interviews.
Frederick T. Dyke
Fluid Equilibria
Accurately Predict the VLE of Thiol-Hydrocarbon Mixtures
This methodology can be used to calculate vapor-liquid equilibria (VLE) between thiols and hydrocarbons at any composition, temperature or pressure to improve gasoline fractionation processes.
Wayne Sim - Chorng H. Twu - Vince Tassone
Career Catalyst
People — The Key to Successful Project Management
While Gantt charts, timelines, budgets, resource constraints, quality challenges, performance measures, and other tools are important, they are neither meaningful nor effective without people.
Eldon R. Larsen
