What is the API gravity of water?
10°
… petroleum industry, however, uses the American Petroleum Institute (API) gravity scale, in which pure water has been arbitrarily assigned an API gravity of 10°. Liquids lighter than water, such as oil, have API gravities numerically greater than 10.
How do you measure gravity in oil?
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.
- RD at 60oF = 141.5 / (API gravity + 131.5)
- Barrels of crude oil per metric ton = 1 / [141.5 / (API gravity + 131.5) x 0.159]
What is specific gravity of crude oil?
So any liquid with a density greater than water has a specific gravity greater than 1. Liquids with a density lower than water, which includes most crude oil grades and petroleum products, will have a specific gravity between 0.0 and 1.0.
How do you calculate specific gravity?
The density of the object (x) divided by the density of water (1) gives us the specific gravity 0.8. Multiplying both sides by one will cancel out the denominator and give us the value of x, our density. Our object has a density of 0.8 grams.
What is API formula?
The formula for API gravity is API = (141.5/SG) -131.5 where SG is the specific gravity of the petroleum liquid being measured. For example, for an API gravity of 50, add 131.5 to obtain 181.5.
What is the unit of API gravity?
degrees
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 API gravity used for?
API gravity is a commonly used index of the density of a crude oil or refined products. API stands for the American Petroleum Institute, which is the industry organization that created this measure. A crude oil will typically have an API between 15 and 45 degrees. Higher API indicates a lighter (lower density) crude.
Is density equal to specific gravity?
Although the two terms often are used interchangeably, there is a technical difference between specific gravity and density. Density is defined as the mass per unit volume of a substance. When the specific gravity is defined based on water at 4°C, then the specific gravity is equal to the density of the liquid.
What is a CRUD API?
CRUD stands for Create, Read, Update, and Delete. But put more simply, in regards to its use in RESTful APIs, CRUD is the standardized use of HTTP Action Verbs. Keep in mind there are several different HTTP Action Verbs available, and it’s easy to want to incorporate these new verbs and make your API new and different.
What is API value?
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.
How do you convert API to specific gravity?
The formula for API gravity is API = (141.5/SG) -131.5 where SG is the specific gravity of the petroleum liquid being measured. For example, for an API gravity of 50, add 131.5 to obtain 181.5. Divide 141.5 by (131.5 + API gravity) to obtain the specific gravity of the oil.
What does API gravity stand for?
Industry indicator. 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.
What is meant by 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 is thus an inverse measure of a petroleum liquid’s density relative to that of water (also known as specific gravity ).
What is the formula for calculating specific gravity?
Here is the formula for calculating specific gravity: SG = (ρ object or liquid)/ ρ water. The formula could be rewritten if you already have the specific gravity of a solid object or liquid and what you need to calculate is their density.
