User:Milton Beychok/Sandbox: Difference between revisions
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==Relationship between API gravity and specific gravity== | ==Relationship between API gravity and specific gravity== | ||
The relationship between API gravity and [[specific gravity]] is: | The relationship between API gravity and [[specific gravity]] (SG) is: | ||
:<math>\mathrm{API | :<math>^\circ \mathrm{API} = \frac{141.5}{\mathrm{SG}_{60\,^\circ \mathrm{F}}^{60\,^\circ \mathrm{F}}} - \mathrm{131.5}</math> | ||
:and | |||
:<math>\mathrm{SG}_{60\,^\circ \mathrm{F}}^{60\,^\circ \mathrm{F}} = \frac{\mathrm{density\; of\; water\; at\; 60\,^\circ \mathrm{F}}} {\mathrm{density\; of\; petroleum\; liquid\; at\; 60\,^\circ \mathrm{F}}}</math> |
Revision as of 17:01, 31 January 2010
The API gravity is an arbitrary scale developed by the American Petroleum Institute (API) as a measure of the density of petroleum liquids relative to the density of water. The values of API gravity are expressed as degrees API (°API).
Relationship between API gravity and specific gravity
The relationship between API gravity and specific gravity (SG) is:
- and