This is the abbreviation for a Boiling Liquid Expanding Vapour Explosion. It is associated with the rupture, under fire conditions, of a pressure vessel containing liquefied gas.



Related Terms

EVAPORATOR

A pressure vessel used to evaporate raw water by means of a steam coil. The steam is condensed by means of cooling water coils, and this distilled water is used as make-up for boiler feed.

DRY BACK

The baffle provided in a firetube boiler joining the furnace to the second pass to direct the products of combustion, that is so constructed to be separate from the pressure vessel and constructed of heat resistant material. (Generally refractory and insulating material)

PRESSURE VESSEL

An unfired, closed vessel used for containing, storing, distributing, distilling, processing, or otherwise handling gas, vapour, or liquid exceeding the service and size limits as defined in CSA Standard B51.

BLANKET GAS

A gas phase introduced into a vessel above a liquid phase to prevent contamination of the liquid, reduce hazard of detonation, or to exert pressure on the liquid. Also known as cushion gas.

BOILING TEMPERATURE

The temperature at which a liquid boils. As the boiling temperature rises with an increase in pressure (see saturated vapor pressure), the boiling temperatures are usually given for atmospheric pressure. At this pressure, water boils at +100° C., butane at - 0.5° C., ammonia at - 33° C. and propane at - 43° C.

BOILING POINT

The temperature at which the vapor pressure of a liquid is equal to the pressure on its surface (the boiling point varies with pressure).

UNFIRED PRESSURE VESSEL

A vessel designed to withstand internal pressure, neither subjected to heat from products of combustion nor an integral part of a fired pressure vessel system.

CANADIAN REGISTRATION NUMBER (CRN)

A registration number that is allotted to pressure vessel designs by the regulatory agency of the province where the design is registered.

BOILER AND PRESSURE VESSEL CODE

An ASME code, The Boiler and Pressure Vessel Code establishes rules of safety governing the design, fabrication, and inspection of boilers and pressure vessels, and nuclear power plant components during construction.

CARBON DIOXIDE EXTINGUISHERS

A fire fighting device consisting of a cylindrical vessel containing carbon dioxide under high pressure with a release trigger and discharge horn.

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