CCPS Process Safety Glossary

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A measure of individual risk expressed as the estimated number of fatalities...

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Use of component selection, conservative design, testing, and burn-in to...

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A failure event in a fault tree that requires further development.

Ability to continue to perform a required function in the presence of faults...

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A system where some parts may fail but the system will still execute...

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A logic model that graphically portrays the combinations of failures that...

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A method used to analyze graphically the failure logic of a given event, to...

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A method by which one or more controlled variables (i.e., pressure,...

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A device that manipulates a process variable normally associated with the...

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A field device used to drive the process to its lowest energy state, or a...

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Process control or safety device that implements the physical action...

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A conclusion reached by the audit team based on data collected and analyzed...

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A combustion reaction accompanied by the evolution of heat, light, and flame...

The minimum temperature at which a flammable or combustible liquid, as...

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Methods of providing for fire control or fire extinguishment. (NFPA 850)...

Three basic conditions are required for fire to take place. These are fuel...

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The atmospheric burning of a fuel-air cloud in which the energy is mostly...

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Configurable digital programs, procedures, rules, and associated...

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A term usually referring to an annunciator feature that indicates which...

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A systematic approach for evaluating the current condition of a piece of...

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A portion of or a complete plant, unit, site, complex or any combination...

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A region in which chemical interaction between gases occurs, accompanied by...

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A device fitted to the opening of an enclosure or to the connecting piping...

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That portion of a flame arrester whose principal function is to prevent...

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That portion of flame arrester whose principal function is to provide a...

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A device that prevents transmission of a flame from a source to a receptor...

The dimensions in which a burning or exploding gas is free to expand, 1D, 2D...

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That portion of the flame reaction zone moving into the unburned gas where...

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A device that opens in response to the pressure wave preceding the flame...

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The movement of a flame front in piping or equipment.

The speed of a flame front relative to a fixed reference point. Flame speed...

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Theoretical temperature achieved based on chemical equilibrium with the...

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Another name for a flame arrester, commonly used in the United Kingdom.

See Flame Speed

The range of gas or vapor amounts in air that will burn or explode if a...

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A gas that can burn with a flame if mixed with a gaseous oxidizer such as...

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