CCPS Process Safety Glossary

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A gas with density less that of air at ambient temperature.

The potential (f) any point is measured by the work required to bring unit...

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A volume within a plant with sufficient congestion and/or confinement that a...

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The temperature that a parcel of air at height z at temperature T would have...

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Generic term for subdivided solid material, comprising pellets, granules,...

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Vertical lines bounding and connected to Ladder Diagrams on the left and,...

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See Pre-Trip Alarm.

A screening tool to collect information that potential clients need to begin...

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See Pre-Trip Alarm.

Constant k* in the Arrhenius equation (also called frequency factor). The...

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A device that looks and operates like the final commercial unit. This...

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A systematic and thorough check of a process prior to the introduction of a...

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An alarm which allows an operator to take corrective action before an...

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A process vessel or piping system (length to diameter ratio of less than 5)...

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Data generated by using correlations, factored estimation procedures, and...

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An equipment maintenance strategy based on measuring the condition of...

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The compass direction from which the wind blows the majority of the time....

A requirement that explicitly states both "what to do" and "how to do it."...

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In a compartmented system in which there are separate but interconnected...

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A pressure relief device which is designed to reclose and prevent the...

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See Pressure Relief Valve

The process of eliminating or preventing the hazards or risks associated...

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Maintenance that seeks to reduce the frequency and severity of unplanned...

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Measures taken at the initial stages of a runaway to avoid further...

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A safeguard that forestalls the occurrence of a particular loss event, given...

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A tank, vessel, pipe, transport vessel or equipment intended to serve as the...

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A basic independent event for which frequency can be obtained from...

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The primary management elements for transportation of hazardous materials,...

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A commonly used term in the nuclear industry to describe the quantitative...

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The expression for the likelihood of occurrence of an event or an event...

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The probability that a system will fail to perform a specified function on...

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A random variable with a mean of 5 and a variance of 1, which is used in...

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Written step-by-step instructions and associated information (cautions,...

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A broad term that includes the equipment and technology needed for...

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An area containing equipment (e.g. pipes, pumps, valves, vessels, reactors,...

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The ratio of the specification range to six standard deviations of the...

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