( See also: Standard temperature and pressure#Molar volume of a gas.) A standard barrel in this context is thus not simply a measure of volume, but of volume under specific conditions. This standard barrel of oil will occupy a different volume at different pressures and temperatures. Īccording to the American Petroleum Institute (API), a standard barrel of oil is athe amount of oil that would occupy a volume of exactly 1 barrel (159 L) at reference temperature and pressure conditions of 60 ☏ (15.6 ☌) and 14.696 psi (101.325 kPa). In the oil industry, one barrel ( unit symbol bbl) is a unit of volume used for measuring oil defined as 42 US gallons or 158.987 litres or 35 imperial gallons. gallons, actual barrels used in industry are typically 55 U.S. While the barrel as a unit of measurement for oil is 42 U.S.
#USED 20 GALLON FISH TANK PROFESSIONAL#
When referring to beer barrels or kegs in many countries, the term may be used for the commercial package units independent of actual volume, where common range for professional use is 20–60 L, typically a DIN or Euro keg of 50 L. The size of beer kegs in the US is based loosely on fractions of the US beer barrel.
In the US most fluid barrels (apart from oil) are 31.5 US gallons (26 imp gal 119 L) (half a hogshead), but a beer barrel is 31 US gallons (26 imp gal 117 L). In the UK a beer barrel is 36 imperial gallons (43 US gal 164 L).
In other commercial connections, barrel sizes such as beer keg volumes also are standardised in many countries. In the international oil market context, however, prices in United States dollars per barrel are commonly used, and the term is variously translated, often to derivations of the Latin / Teutonic root fat (for example vat or Fass). As a result, the meaning of corresponding words and related concepts (vat, cask, keg etc.) in other languages often refers to a physical container rather than a known measure. In most countries such usage is obsolescent, increasingly superseded by SI units. The name was derived in medieval times from the French baril, of unknown origin, but still in use, both in French and as derivations in many other languages such as Italian, Polish, and Spanish. Since medieval times the term barrel as a unit of measure has had various meanings throughout Europe, ranging from about 100 litres to about 1,000 litres. In many connections the term drum is used almost interchangeably with barrel. For historical reasons the volumes of some barrel units are roughly double the volumes of others volumes in common use range approximately from 100 to 200 litres (22 to 44 imp gal 26 to 53 US gal). These are firkins, each holding 9 imperial gallons (41 L) or a quarter of a UK beer barrel.Ī barrel is one of several units of volume applied in various contexts there are dry barrels, fluid barrels (such as the U.K. For other uses, see BBL (disambiguation).Īle casks at a brewery in the UK.
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