Glossary of Terms and Definitions

glowing
made luminous by heat cf. incandescence

heat flux
amount of thermal energy emitted, transmitted or received per unit area and unit time

heat of combustion
thermal energy produced by combustion of unit mass of a given substance

effective heat of combustion
heat of combustion of a substance under specified conditions gross heat of combustion heat of combustion of a substance when the combustion is complete and any produced water is entirely condensed under specified conditions

net heat of combustion
heat of combustion of a substance when the combustion is complete and any produced water is in the vapour state under specified conditions

heat release
thermal energy which is released by the combustion of an item under specified conditions

heat release rate
thermal energy released per unit time by an item during combustion under specified conditions

heat stress
conditions caused by exposure to elevated/reduced temperature, radiant heat flux (85), or a combination of these factors

"I" criterion
cf. thermal insulation criterion "I"

ignitability
measure of the ease with which an item can be ignited under specified conditions

ignitable
capable of being ignited

ignite
intransitive verb to catch fire with or without the application of an external heat source

ignite
transitive verb to initiate combustion cf. light

ignited, adj
state of an item undergoing combustion

ignition
initiation of combustion

ignition source
source of energy that initiates combustion

ignition temperature
(minimum) temperature at which combustion can be initiated under specified test conditions

ignition time
Deprecated term. cf. minimumignition time

ISO 9001 2000
Quality systems model for quality assurance in design, development, production, installation and servicing

incandescence
emission of light produced by a material when intensely heated cf. glowing

inflammability
Deprecated term cf. flammability

inflammable
Deprecated term. cf. flammable

integrity
ability of a separating element when exposed to fire on one side, to prevent the passage of flames (60) and hot gases or the occurrence of flames on the unexposed side, for a stated period of time in a standard fire resistance test

integrity criterion "E"
criterion by which the ability of a separating element to prevent the passage of flames and hot gases is assessed cf. fire resistance

intermediate-scale test
test performed on an item of medium dimensions

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Glossary of Terms and Definitions