Why is the "barrel", and American barrels, rather than some of the more authoritative and accurate quality unit?
The answer to the second question is traditional and customary practice.When it comes to oil "bucket", you probably think of first is the kind of sweet potato baked roadside black steel. In fact, the early barrels of oil are wood. At the beginning of 1860s, crude oil storage and transportation and trade with wooden barrels as the main form of packaging. A carriage can hold 8 barrels of oil. The driver, horses, carts, and casks carry crude oil from the side of the derrick to the railway station and dock. Oil pipeline in 1865, in 1878 the first oil tanker in the Caspian Sea maiden voyage, in 1883 the railway oil extended from North America to the hinterland of the caucasus. 42 gallons of wooden barrels
This problem actually brings out two questions. First, why do you use a volume unit rather than a mass unit? Second, why is the US gallon barrel, rather than the international standard, KL? First problem can answer, the main reason is the convenience of operation technology. Because of oil supplies especially crude oil so amazing goods in bulk fluid, metering operation, is the first to measure volume (from depth + tank or cabin design data), then the samples back to the lab, after the static stability determination of density, error correction can be obtained after formal quality data. Formal commodity inspection report, then a week, slow, then two months to hand in the hands of the user. Business operations, logistics and capital flow can not afford this time. Therefore, the use of volume measurement data delivery is a must.
Oil barrels are the most common unit of measurement in the measurement of crude oil and petroleum products in the United states. It was the size of the standard specifications of the drums in history (42 US gallons), but now the actual capacity of steel drums used internationally in the 55 US gallons (44 gallons), known as the "55 gallon pail". But due to the U.S. oil trading has always been to the original 42 US gallons per barrel, the concept of oil are still well known and used. Why must we use "bucket" as a unit of measurement?
