CCPS Process Safety Glossary

A substance or agent to which exposure of a pregnant female can result in...

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A manufacturer's Catalogued Peripheral equipped with pushbuttons, lamps,...

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A material that will undergo an exothermic, selfsustaining or accelerating...

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Chemicals and materials are thermally unstable if they decompose, degrade or...

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Data associated with the aspects of a reaction that are based on the...

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The concentration in air that should not be exceeded during any part of the...

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A 15-minute, time -weighted average concentration to which workers may be...

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The time-weighted average concentration limit for a normal 8-hour workday...

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Time from that moment when equipment installation is complete, the time...

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The time within a 24-hour day, represented according to ISO 3307.

A failure that is primarily due to the degradation over the time that a...

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The time period measured from the moment when equipment installation is...

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An estimation of the time required for an exothermic reaction, in an...

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A subset of continuous release (See Continuous Release) that the release...

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The delay encountered by the signal (*) as it passes through the input...

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The delay encountered by the signal (*) as it passes through the output...

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The time required, following the initiation of a specified stimulus to a...

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The time elapsed between two subsequent initiations of the same portion of...

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  • For digital input : sum of TID and TIT.
  • For analog input :...
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  • For digital output : sum of TQT and TQD.
  • For analog output :...
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The time elapsed between a change input signal state at the Field Input...

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The time required by the signal to pass (transfer) from the data storage in...

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The time required by the signal to pass (transfer) from the data storage in...

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The time required by a MPU to carry out a specified portion of a user's...

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A function block delaying a booisan input a specified Duration when changing...

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A function block delaying a booisan input signal a specified Duration when...

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TLm

Median Tolerance Limit at which approximately 50% of the exposed species...

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Threshold Limit Value; a term used by ACGIH to express the airborne...

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Models of explosion characteristics relating vapor cloud explosions to the...

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The maximum level of risk of a particular technical process or condition...

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A measure of the uncertainty arising from the physical and the environmental...

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Contract manufacturer (external manufacturer).

An outsourced manufacturing company contracted to process materials to...

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Providing manufacturing services for a fee by a contractor (the toller), to...

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The unwanted event or incident at the "top" of a fault tree that is traced...

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Dispersion models with no concentration gradients within the vapor cloud....

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