An enclosure which will withstand an internal ignition of a flammable gas and which will prevent the transmission of any flame able to ignite a flammable gas which may be present in the surrounding atmosphere.



Related Terms

EXPLOSION-PROOF/FLAMEPROOF

Usually spoken of an enclosure for equipment such as telephones, light fixtures, radios, etc., which will withstand an internal ignition of a flammable gas but prevent the transmission of any flame outside of the enclosure to ignite surrounding flammable gasses which might be present in the surrounding atmosphere. Does not mean intrinsically safe.

EXPLOSION-PROOF

An enclosure which will withstand an internal ignition of a flammable gas and which will prevent the transmission of any flame able to ignite a flammable gas which may be present in the surrounding atmosphere.

AUTO-IGNITION TEMPERATURE

The lowest temperature to which a liquid or gas requires to be raised to cause self-sustained spontaneous combustion without ignition by a spark or flame.

BOILER PRIMARY SAFETY CONTROL

A control responsive directly to flame properties, sensing the presence of flame and, in the event of ignition failure or unintentional flame extinguishments, causing safety shutdown.

GAS-FREEING

The removal of toxic, and/or flammable gas from a tank or enclosed space with inert gas followed by the introduction of fresh air.

INCENDIVE SPARK

A spark of sufficient temperature and energy to ignite a flammable gas mixed with the right proportion of air.

PILOT LIGHT

A small, constantly burning flame used to ignite a gas burner.

FLAME PROPAGATION RATE

Speed of travel of ignition through a combustible mixture.

COMPRESSOR STATION

A permanent facility which increases the pressure on gas to move it in transmission lines or into storage.

FLAME ARRESTOR

A device fitted in gas vent pipelines to arrest the passage of flame into enclosed spaces.

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