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The water ton is used chiefly in Great Britain, in statistics dealing with petroleum products, and is defined as 224 imperial gallons (35.96 cu ft; 1.018 m 3), [22] the volume occupied by 1 long ton (2,240 lb; 1,016 kg) of water under the conditions that define the imperial gallon.
The U.S. Energy Information Administration defines the barrel of oil equivalent as about 6 gigajoules (1.7 megawatt-hours; 5.7 million British thermal units). [1] The value is necessarily approximate as various grades of oil and gas have slightly different heating values.
The metric ton is the name used for the tonne (1000 kg, 2 204.622 62 lb), which is about 1.6% less than the long ton. The US customary system also includes the kip , equivalent to 1,000 pounds of force, which is also occasionally used as a unit of weight of 1,000 pounds (usually in engineering contexts).
Both the 42-US-gallon (159 L) barrels (based on the old English wine measure), the tierce (159 litres) and the 40-US-gallon (150 L) whiskey barrels were used. Also, 45-US-gallon (170 L) barrels were in common use. The 40 gallon whiskey barrel was the most common size used by early oil producers, since they were readily available at the time.
Therefore the volume of hold space required for several tuns was greater than the total of the capacity of those tuns. 252 imperial gallons is just over 40 cubic feet (1.1 m 3). British practice by the 19th century was for a ton of cargo volume to be 50 cubic feet (1.4 m 3).
[nb 1] (This was the basis for calling 64 gallons a quarter.) At some time before the 15th century, it was reduced to 252 gallons, so as to be evenly divisible by other small integers, including seven. [nb 2] Note that a 252-gallon tun of wine has a mass of approximately 2060 pounds, [6] between a short ton (2000 pounds) and a long ton (2240 ...
Typically a large vat or vessel, most often holding 252 wine gallons, but occasionally other sizes (e.g. 256, 240 and 208 gallons) were also used. [2] The modern tun is about 954 litres. The word tun is etymologically related to the word ton for the unit of mass, the mass of a tun of wine being approximately one long ton , which is 2 240 pounds ...
A long ton, also called the weight ton (W/T), [1] imperial ton, or displacement ton, is equal to: . 2,240 pounds (1,016.0 kilograms; 1.0160 metric tons) exactly 12% more than the 2,000 pounds of the North American short ton, being 20 long hundredweight (112 lb) rather than 20 short hundredweight (100 lb)