CCPS Process Safety Glossary

Loose “ring” flange for connecting flared or stub end pipe. Continuity may...

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A measure of risk to a group of people. It is most often expressed in terms...

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Programs, procedures, rules, and associated documentation required for the...

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An interlock accomplished through an application program within a PES (see...

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See Software Interlock.

Measure of lack of porosity of an object. For example, a solid building has...

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A term expressing the percentage of a material (by weight) that will...

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A mode of operation of solid state output devices in which the device...

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The estimation, based on the release specification, of the actual cloud...

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Oxides of Sulfure; undesirable air pollutants.

Importance: Often...

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Transient discrete electric discharge which takes place between two...

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Instructions that describe proper handling and storage procedures specific...

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A description of engineering precautions and personal protection that should...

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A dimensionless, temperature dependent ratio of the density of one substance...

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The area under the overpressure versus time curve.

Steps that should be taken if a chemical spill or leak occurs.

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The document prepared in compliance with U.S. regulation “Guidelines For The...

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Capable of igniting and burning in air without the presence of an ignition...

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Refers to the ratio of the suppression of turbulence by thermal effects to...

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The Pasquill stability class scheme is based on time of day, wind speed,...

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Steady burning of a flame, stabilized at, or close to the flame arrester...

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A detonation that progresses through a confined system without significant...

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Those materials that normally have the capacity to resist changes in their...

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Assembling, testing, and operating a process control system in a controlled...

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Distance from the center of an explosion

The square root of the sum of squared values of concentration minus...

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Hardware operation that is normally not running but must be ready run, e.g...

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A programming language construct that represents a set of declarations or a...

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The class of phenomena recognized by the presence of electrical charges,...

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A flame arrester designed to prevent flame transmission by quenching gaps (...

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Conditions that are characterized by constant concentrations and...

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Two events (A and B) are statistically dependent if the probability that A...

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Two events (A and B) are statistically independent if the probability that...

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The use of statistical techniques (such as control charts) to analyze a...

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Short Term Exposure Limit; ACGIH terminology. See also, "TLV-STEL."

A term used to describe a balanced ratio of chemical reactants that would...

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