What is API specific gravity?
A specific gravity scale developed by the American Petroleum Institute (API) for measuring the relative density of various petroleum liquids, expressed in degrees. API gravity is gradated in degrees on a hydrometer instrument and was designed so that most values would fall between 10° and 70° API gravity.
What is the API gravity of water at 60f?
API gravity = (141.5/specific gravity @ 60°F) – 131.5; thus, a petroleum liquid with an API gravity of 10.0 @ 60°F has a specific gravity of 1.0 (which is the same as water).
What is relation between API gravity and specific gravity?
API gravity is thus an inverse measure of a petroleum liquid’s density relative to that of water (also known as specific gravity). It is used to compare densities of petroleum liquids. For example, if one petroleum liquid is less dense than another, it has a greater API gravity.
How do you convert API to specific gravity?
How do you convert density to API? Divide 141.5 by (131.5 + API gravity) to obtain the specific gravity of the oil. Continuing the example, divide 141.5 by 181.5 from the last step to get . 7796. Multiply the specific gravity of the oil by the density of water to obtain the density of the oil. Click to read further detail.
What does API gravity stand for?
API gravity is short for American Petroleum Institute gravity, an inverse measure that is used to determine the weight of petroleum liquids in comparison to water. If a liquid has API gravity of more than 10 it is considered a light oil that floats on water. If the liquid’s API gravity is less than 10 it will sink and falls into the heavy oil
What is the definition of API gravity?
The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. if its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks. API Gravity Definitions API Gravity to Specific Gravity and Density Chart:
What is the relation between API gravity and specific gravity?
The official formula used to derive the gravity of petroleum liquids from the specific gravity (SG), as follows: API gravity = 141.5/SG – 131.5. The relative density of petroleum liquids can also be uncovered by using API gravity value: RD at 60 o F = 141.5 / (API gravity + 131.5) A key formula for establishing barrels of crude oil per metric ton