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Measure of the fluid density of a substance with specific gravity
at reference (usually STP) conditions: LaTeX Math Inline body SG
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\gamma_{API} \, [{\rm ^\circ API}] = \frac{141.5}{\rm SG} - 131.5 |
This is a popular density unit for crude oils and gas condensate.
See also
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Natural Science / Physics / Fluid density
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