API Gravity -Relative Density


API Gravity -Relative Density :

A means used by the petroleum industry to express the density of petroleum liquids. API gravity is measured by a hydrometer instrument having a scale graduated in degrees API. The relation between API gravity and relative density (formerly called specific gravity) is:

API Gravity at 60oF = 141.5 - 131.5

Relative Density 60F/60F

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