CCPS Process Safety Glossary

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A gas with density approximately equal to that of air at ambient temperature...

The in-cloud density is equal to the ambient density. Neutral cloud and...

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The ambient boundary layer is well-mixed, with Pasquill stability class D,...

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An exposure concentration at which there are no statistically and...

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Sections of equipment with definite boundaries (e.g., a line between two...

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An event due to causes unassociated with the movement-related aspects of...

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Industries which do not comprise the CPI as their primary function but which...

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A material that, in the form in which it is used and under the conditions...

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Possessing a conductivity of less than 102 pS/m or a resistivity greater...

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Evaluation of an equipment item with the intention of measuring an equipment...

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A gas that does not meet the definition of a flammable gas.

The phase of process operation between the startup phase and shutdown phase...

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Any process operations intended to be performed between startup and shutdown...

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A gradual erosion of standards of performance as a result of increased...

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The front surface of vapor cloud, that is, the surface farthest along in the...

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NOx

Oxides of Nitrogen; undesirable air pollutants. Importance: Often listed on...

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Extracts of foods claimed to have a medicinal effect on human health.

Freedom from bias.

The noting and recording of information to support findings. Also field...

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Refers to PES equipment status. A PES becomes obsolete if the plant...

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Proportion of building occupants that could potentially suffer an injury or...

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An incident involving injury to workers.

People, property, or the environment located outside of the site property...

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Persons located outside of the site property line that may be impacted by an...

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See Resistance.

The Current Density (Amperes per square meter) divided by Electric Field...

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Relating to the sense of smell. Importance: The olfactory organ in the...

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A PES is said to be On-Line when it is in active control of a machine or...

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Employees, contractors, visitors, service providers, and others present at...

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The fraction of the time that a process unit is operating

an oncogene is a gene that, when mutated or expressed at high levels, helps...

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Defined to be the temperature at which the heat that is released by a...

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A method of control by which signals are transmitted by one or more forward...

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A series of sequential written details describing how to operate equipment...

The values or ranges of values within which the process parameters normally...

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A phase of operation during the operation and maintenance stages of the life...

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