September 2024 | AIChE

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September 2024

Fuel Gas

Gaseous fuels consisting of natural gas and various manufactured or by-product gases.

Fuel

the reducer; any combustible material, solid, liquid or gas. Most solids and liquids must vaporize before they will burn.

Front-line Personnel

The personnel who perform tasks that produce the output of the work group. Front-line personnel include operations and maintenance personnel, engineers, chemists, accountants, shipping clerks, etc.

Frequency modeling

Development of numerical estimates of the likelihood of an event occurring.

Frequency Data

The data required to generate accident and non-accident rates, the probability of a release following an accident, the range of release sizes to be considered, and the probabilities of various outcomes of release (i.e., toxic, flammable, explosive).

Frequency

Number of occurrences of an event per unit time (e.g., 1 event in 1000 yr. = 1 x 10-3 events/yr.).

Force Majeure

An event or effect that cannot reasonably be anticipated or controlled.

Flashpoint

The temperature at which a liquid develops sufficient vapor pressure to form a vapor/air mixture capable of undergoing combustion after ignition from an external energy source. (Fire point is the temperature at which the reaction will be sustained).

Flashback

Undesired flame propagation opposite to the direction of flow. It is also used to describe failure of a flame arrester element.

Flash Point

The minimum temperature at which a liquid gives off sufficient vapor to form an ignitable mixture with air within the test vessel used (Methods: ASTM 502). The flash point is less than the fire point at which the liquid evolves vapor at a sufficient rate for indefinite burning.

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