Barrel: In the oil industry

In the oil industry, one barrel (unit symbol bbl) is a unit of volume used for measuring oil defined as exactly 42 US gallons, approximately 159 liters, [10][11] or 35 imperial gallons. [10] According to the American Petroleum Institute (API), a standard barrel of oil is the amount of oil that would occupy a volume of exactly 1 barrel (158.99 L) at reference temperature and pressure conditions of 60 °F (15.6 °C) and 14.696 psi (101,325 Pa; 1 atm). This standard barrel of oil will occupy a ... BARREL definition: 1. a large container, made of wood, metal, or plastic, with a flat top and bottom and curved sides…. Learn more. Learn the meaning and usage of the word barrel as a noun and a verb in British and American English. Find out the different types, units, and expressions of barrel in various contexts. Learn the meaning, pronunciation, and examples of the word barrel as a noun, adjective, and verb. Find out the different units of capacity, shapes, and functions of barrels in various contexts.