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When converting oil density to specific gravity using the above definition, it is important to use the correct density of water, according to the standard conditions used when the measurement was made. The official density of water at 60 °F according to the 2008 edition of ASTM D1250 is 999.016 kg/m 3. [2] The 1980 value is 999.012 kg/m 3. [3]
The clear cut definition of light and heavy crude varies because the classification is based more on practical grounds than theoretical. The New York Mercantile Exchange (NYMEX) defines light crude oil for domestic U.S. oil as having an API gravity between 37° API (840 kg/m 3) and 42° API (816 kg/m 3), while it defines light crude oil for non-U.S. oil as being between 32° API (865 kg/m 3 ...
Density system unit unit-code symbol or abbrev. notes sample default conversion combination output units Metric: kilogram per cubic metre: kg/m3 kg/m 3: 1.0 kg/m 3 (1.7 lb/cu yd)
When reservoir viscosity measurements are not available, extra-heavy oil is considered by the WEC to have a lower limit of 4° API. [4] In other words, oil with a density greater than 1000 kg/m 3 (or a specific gravity greater than 1) and a reservoir viscosity of more than 10,000 centipoises.
Near 0 °Bé would be approximately the density of water. −100 °Bé (specific gravity, 0.615) would be among the lightest fluids known, such as liquid butane. Thus, the system could be understood as representing a practical spectrum of the density of liquids between −100 and 100, with values near 0 being the approximate density of water.
API design separators, and similar gravity tanks, are not intended to be effective when any of the following conditions apply to the feed conditions: [citation needed] Mean Oil droplets size in the feed is less than 150 micron; Oil density is greater than 925 kg/m3
Since API gravity is an inverse measure of a liquid's density relative to that of water, it can be calculated by first dividing the liquid's density by the density of water at a base temperature (usually 60 °F) to compute Specific Gravity (SG), then converting the Specific Gravity to Degrees API as follows: = =
API is the API gravity factor. The default value is 33.4, corresponding to a density of 858.1 kg/m³ or 7.330 bbl/t at 60 °F. 2 can either be a word or a number dependant on "mode". 3 is used only in range mode. 4 is used only in range mode. abbr can take values of either on or off.