API scale

API scale

[¦ā¦pē¦ī ‚skāl]
(chemical engineering)
The American Petroleum Institute hydrometer scale for the measurement of the specific gravity of liquids; used primarily in the American petroleum industry.
References in periodicals archive ?
The crude would be the lightest of Aramco's new blends, with a density of 44 degrees on the API scale and 0.
The API scale was designed so that most values would fall between 10 and 70 API gravity degrees.
The oil from the Guara ranked 28 on the API scale, making it much lighter than the bulk of crude produced in Brazil, which ranges around 14 to 18 API.