Table of Contents
- 1 How do you measure specific gravity of crude oil?
- 2 What is the specific gravity of fuel oil?
- 3 Why API gravity is used instead of specific gravity for petroleum fuels?
- 4 Which fuel has the highest specific gravity?
- 5 What is API specific gravity?
- 6 What is API gravity and how is it calculated?
- 7 How do you calculate the specific gravity of a diesel?
- 8 How do you measure specific gravity of fuel?
How do you measure specific gravity of crude 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 the specific gravity of fuel oil?
0.91 – 0.93
Specific Gravity Resource
| Liquid | SG @ 60°F / 15.6°C |
|---|---|
| Gasoline | 0.68 – 0.74 |
| Kerosene | 0.78 – 0.82 |
| Jet Fuel (av) | 0.62 |
| Lard Oil | 0.91 – 0.93 |
What does API gravity tell us about a specific crude oil?
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. Lower API indicates a heavier (more dense) crude.
Why API gravity is used instead of specific gravity for petroleum fuels?
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.
Which fuel has the highest specific gravity?
Detailed Solution
| Material | Specific gravity |
|---|---|
| Balsa wood | 0.2 |
| Oakwood | 0.75 |
| Ethanol | 0.78 |
| Olive oil | 0.91 |
Why do we need crude oil benchmarks?
Energy Intelligence Group publishes a handbook which identified 195 major crude streams or blends in its 2011 edition. Benchmarks are used because there are many different varieties and grades of crude oil. Using benchmarks makes referencing types of oil easier for sellers and buyers.
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 API gravity and how is it calculated?
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. The arbitrary formula used to obtain this effect is: API gravity = (141.5/SG at 60 degF) – 131.5, where SG is the specific gravity of the fluid.
How do you find the specific gravity of a gas?
Gas specific gravity is defined as the ratio of the density of the gas to the density of air at 1 atm pressure at 60°F (standard conditions). If ideal gas law behavior is assumed, gas specific gravity is the molecular weight of the gas divided by the molecular weight of air.
How do you calculate the specific gravity of a diesel?
Volumetric Weight For example, Diesel Fuel has an approximate SG (Specific Gravity) of 0.82, so it is lighter than water (SG =1.0) so to calculate the weight of diesel in the same sized storage tank, simply multiply the volume(litres) by the specific gravity (SG) of the fluid.
How do you measure specific gravity of fuel?
For fuels, specific gravity can be determined by dividing the density of the fuel (in units of pounds per gallon) by the density of water (8.325 pounds per gallon). Let’s look at one example. Sunoco Supreme weighs 5.95 pounds per gallon. Applying some math: 5.95 / 8.325 = 0.715.