Search results
Results from the WOW.Com Content Network
The chemical profiles, or crude oil assays, specify important properties such as the oil's API gravity. The delivery locations are usually sea ports close to the oil fields from which the crude was obtained (and new fields are constantly being explored), and the pricing is usually quoted based on FOB ( free on board , without consideration of ...
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.
Heavy crude oils have lower API gravity figures, and a larger percentage of impurities. [9] It is used in the making of heavier outputs - e.g., asphalt [6] - and has a higher viscosity, making it more difficult to transport and extract.
API gravity, a measure of the density of petroleum. API number, a unique identifier applied to each petroleum exploration or production well drilled in the United States. API unit, a standard measure of natural gamma radiation measured in a borehole. [16] "Non-API", an item (e.g., tubular connector) not conforming to API standards
The clear cut definition of light and heavy crude varies because the classification is based more on practical grounds than theoretical. The New York Mercantile Exchange (NYMEX) defines light crude oil for domestic U.S. oil as having an API gravity between 37° API (840 kg/m 3) and 42° API (816 kg/m 3), while it defines light crude oil for non-U.S. oil as being between 32° API (865 kg/m 3 ...
Thus, the API gravity or specific gravity is widely used for the classification of crude oils, based on a scheme proposed by the American Petroleum Institute (Table 1). A high API value >30 means a light crude with paraffinic character; a low API value means a heavy crude with increasing aromatic character. Table 1.
Download QR code; Print/export Download as PDF; ... It has a gravity of 31° API (specific gravity of 0.871) and a sulfur content of 2%/weight. [2] See also.
The API separator is a gravity separation device designed using Stokes' law principles that define the rise velocity of oil droplets based on their density, size and water properties. The design of the separator is based on the specific gravity difference between the oil and the wastewater because that difference is much smaller than the ...