To convert API gravity to density in g/cm^3, you can use the formula: Density = 141.5 / (API gravity + 131.5). This formula is derived from the relationship between API gravity and density in the petroleum industry.
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API gravity is a measure of how heavy or light a petroleum liquid is compared to water, with higher API gravity values indicating lighter oils. Specific gravity, on the other hand, is a measure of the density of a substance compared to the density of water. The two are related by the formula: API gravity = (141.5 / specific gravity) - 131.5.
Specific gravity of a substance is defined as its density relative to the density of water. To convert the density of crude oil into specific gravity, you can divide the density of the crude oil by the density of water (1000 kg/m³ at 4°C). This will give you the specific gravity of the crude oil relative to water.
API 24.8 corresponds to approximately 7.3 barrels per metric ton. This conversion factor helps to establish the volume of a given quantity of oil at that API gravity.
The weight of a barrel of oil will depend on its density. A barrel contains 42 gallons and density is typically measured in units of API gravity. Units can be a bit confusing in this case. We need to convert from API density to pounds per gallon. Crude oil can typically vary from 15 to 45 deg API although I have worked with oils as low as 8 and as high as 50. Let us consider oil gravity of 30 deg API, as all other densities are calculated in the same way. Specific Gravity = 141.5/(131.5 + 30) = 0.876 The specific gravity is the density of the oil relative to water. Now, to convert this to pounds per gallon, we must multiply the answer by 8.34 (density of water is 8.33 pounds per gallon): 8.34 x 0.876 = 7.30 pounds/gallon. Since there are 42 gallons in a barrel, we must multiply this answer by 42: 42 x 7.30 = 307 pounds. To summarize, a) convert API to specific density b) convert specific density to pounds per gallon and c) multiply gallons in one barrel by the pounds per gallon.
In the API gravity formula, 141.5 is a constant used to standardize the API gravity scale. It represents the specific gravity of water at 60°F. 131.5 is the specific gravity of the liquid being measured. By subtracting 131.5 from 141.5 and dividing the result by 0.1, you can calculate the API gravity of the liquid.