API gravity
API gravity
(OP)
Dear All,
I need to calculate the API gravity for crude oil to calculate corrosion rate for each stream. We have the data water specific gravity, gas specific gravity and oil specific gravity separately, How to calculate the API gravity for crude oil based on these 3 values???
Number of lines are coming from different wells and having different specific gravitites. How to find the common API gravity among these?
Thanks to all
I need to calculate the API gravity for crude oil to calculate corrosion rate for each stream. We have the data water specific gravity, gas specific gravity and oil specific gravity separately, How to calculate the API gravity for crude oil based on these 3 values???
Number of lines are coming from different wells and having different specific gravitites. How to find the common API gravity among these?
Thanks to all





RE: API gravity
°API=(141.5/SGat 60F)-131.5
(pure water has a °API of 10, lower numbers than 10 will not float on water)
If you want a blended mix SG, you have to know the relative mass flow rates of the three components. Multiply each mass flow rate times its SG (relative to water, the 0.7 SG you have for gas is relative to air, convert it to water and get a really tiny number). Add the three products together and divide by the sum of the mass flow rates. Use this SG in the equation above.
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist
RE: API gravity
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: API gravity
I need to ask one thing, Can I use oil specific gravity to calculate API gravity instead of blended mix SG?
RE: API gravity
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist