CCPS Process Safety Glossary

The combination of concentration and time for inhalation of a toxic gas that...

Read More...

A gas having a health hazard rating of 3 or 4 as defined in NFPA 704.

In the context of these guidelines, a measure of the danger posed to living...

Read More...

The quality, state, or degree to which a substance is poisonous and/or may...

Read More...

The trademark name or commercial trade name for a material.

...

Read More...

Any region marking the area where one formula is used at smaller values of...

Read More...

A partial discharge from a nonconductive layer on a conductive substrate....

Read More...

The fraction of radiant energy that is transmitted from the radiating object...

Read More...

A bidirectional rectifier (essentially two SCRs in parallel) that function...

Read More...

Charge separation caused by rubbing of surfaces, creating “triboelectricity...

Read More...

The cube of ten thousand. Similarly in the US system, a billion is the cube...

Read More...

The ratio of the turbulent velocity to the mean wind speed (e.g., óu/u)....

See Burning Velocity

Rate of spread in the vertical (z), lateral (y), or downwind (x) directions...

Read More...

Components of turbulent speed fluctuations. For example, the lateral,...

Read More...

A time during which a unit is shut down for repair and maintenance after a...

Read More...

A four digit number used by both the United Nations and the U.S. Department...

Read More...

The probability the fault event exists at a specified time.

A measure, often quantitative, of the degree of doubt or lack of certainty...

Read More...

When a flammable vapor is released, its mixture with air will form a...

Read More...

The probability the fault event exists at a specified time or occurs during...

Read More...

Actual root causes.

A base event that is not developed because of insufficient consequence or...

Read More...

An in-line flame arrester that is designed to stop flame propagation...

Read More...

A power supply that employes automatic switching of main power supply from...

Read More...

The side of a flame arrester and system to which it is connected where flame...

Read More...

The probability that the fault event occurs during a specified time interval...

A failure may lie dormant in the system and only be discovered as a result...

Read More...

Tending toward decomposition or other unwanted chemical change during normal...

Read More...

See Overdriven Detonation.

A material that, in the pure state or as commercially produced, will...

Read More...

Substance or material which in a pure state or as normally produced...

Read More...

To revise a prior PHA, as required, to reflect any changes that have...

Read More...

That concentration of a combustible material in air above which ignition...

Read More...

The highest molar (or volume) concentration of a combustible substance in an...

Read More...

The highest concentration of a vapor or gas (the highest percentage of the...

Read More...

Pages