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Last Updated: October 14, 2019
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API gravity of U.S. refinery inputs by region

Source: U.S. Energy Information Administration, Monthly Refinery Report

The API gravity of crude oil input to U.S. refineries has generally increased, or gotten lighter, since 2011 because of changes in domestic production and imports. Regionally, refinery crude slates—or the mix of crude oil grades that a refinery is processing—have become lighter in the East Coast, Gulf Coast, and West Coast regions, and they have become slightly heavier in the Midwest and Rocky Mountain regions.

API gravity is measured as the inverse of the density of a petroleum liquid relative to water. The higher the API gravity, the lower the density of the petroleum liquid, so light oils have high API gravities. Crude oil with an API gravity greater than 38 degrees is generally considered light crude oil; crude oil with an API gravity of 22 degrees or below is considered heavy crude oil.

The crude slate processed in refineries situated along the Gulf Coast—the region with the most refining capacity in the United States—has had the largest increase in API gravity, increasing from an average of 30.0 degrees in 2011 to an average of 32.6 degrees in 2018. The West Coast had the heaviest crude slate in 2018 at 28.2 degrees, and the East Coast had the lightest of the three regions at 34.8 degrees.

Production of increasingly lighter crude oil in the United States has contributed to the overall lightening of the crude oil slate for U.S. refiners. The fastest-growing category of domestic production has been crude oil with an API gravity greater than 40 degrees, according to data in the U.S. Energy Information Administration’s (EIA) Monthly Crude Oil and Natural Gas Production Report.

Since 2015, when EIA began collecting crude oil production data by API gravity, light crude oil production in the Lower 48 states has grown from an annual average of 4.6 million barrels per day (b/d) to 6.4 million b/d in the first seven months of 2019.

lower 48 states production of crude oil by API gravity

Source: U.S. Energy Information Administration, Monthly Crude Oil and Natural Gas Production Report

When setting crude oil slates, refiners consider logistical constraints and the cost of transportation, as well as their unique refinery configuration. For example, nearly all (more than 99% in 2018) crude oil imports to the Midwest and the Rocky Mountain regions come from Canada because of geographic proximity and existing pipeline and rail infrastructure between these regions.

Crude oil imports from Canada, which consist of mostly heavy crude oil, have increased by 67% since 2011 because of increased Canadian production. Crude oil imports from Canada have accounted for a greater share of refinery inputs in the Midwest and Rocky Mountain regions, leading to heavier refinery crude slates in these regions.

By comparison, crude oil production in Texas tends to be lighter: Texas accounted for half of crude oil production above 40 degrees API in the United States in 2018. The share of domestic crude oil in the Gulf Coast refinery crude oil slate increased from 36% in 2011 to 70% in 2018. As a result, the change in the average API gravity of crude oil processed in refineries in the Gulf Coast region was the largest increase among all regions in the United States during that period.

U.S. refinery inputs by region

Source: U.S. Energy Information Administration, Monthly Imports Report and Monthly Refinery Report

East Coast refineries have three ways to receive crude oil shipments, depending on which are more economical: by rail from the Midwest, by coastwise-compliant (Jones Act) tankers from the Gulf Coast, or by importing. From 2011 to 2018, the share of imported crude oil in the East Coast region decreased from 95% to 81% as the share of domestic crude oil inputs increased. Conversely, the share of imported crude oil at West Coast refineries increased from 46% in 2011 to 51% in 2018.

crude oil oil petroleum liquid fuels refineries
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Must have features of a chat service agent.

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Propane Bullet Tank: What Is It?


A Propane Bullet Tank, also known as LPG Above Ground Tanks, is used for storing liquid natural gas. The tanks have components that best fit your company's needs and are available in various sizes.


The size of a propane bullet tank can be anything from 6,000 and 30,000 gallons, with an 18,000 tank generally the most popular. Tank fill levels should not exceed 70–80% for liquid natural gas to expand inside the vessel.


For holding trucks to reach the site and collect liquids, a tank's average pressure should be approximately 250 psi. This will keep liquid natural gas contained and under low pressure.

What & Where Is Propane Bullet Tank Used?


You're undoubtedly wondering, "Where should I utilize or keep them?" A propane bullet tank is linked to the cold separator drain on a Joule Thomson System (JTS) or mechanical refrigeration devices for the collection and short-term storage of the recovered natural gas liquids.


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LPG is kept in propane bullet tanks because the liquid gas needs to be kept under intense pressure to remain fluid. Bullet tanks effectively do this because of their evenly dispersed, consistent pressure. Since there are no edges, there is also no possibility of a variable pressure region.



What Can a Propane Bullet Tank Do?

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October, 03 2022
Where To Buy Nitrogen Gas?

Nitrogen in liquid form is a colorless, odorless, nonflammable, inert cryogenic liquid. It has a boiling point of less than -130 °F (-196 °C). Although this product is freezing, Nitrogen is widely used in chemical analysis during sample preparation. It is employed in the concentration and condensing of liquid sample volumes. It is used in the production of explosives, nylon, nitric acid, fertilizers, and color-safe operation precautions must be taken when handling or using it in Dubai.

Buy Liquid Nitrogen Cylinder in the UAE from GasNtools and improve the display of your frozen items!

Ways To Deliver Nitrogen

You must be wondering where to buy nitrogen gas. GasNtools is one of the best liquid nitrogen suppliers that can meet your needs for nitrogen gas no matter what they are. They provide nitrogen to:

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40-liter nitrogen cylinder with a 6 m3 capacity at 140 bar and a 10 m3 capacity at 200 bar.

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Although liquid nitrogen is safe in food and beverages, it should not be consumed immediately. Before providing it to the customer, it must have vanished entirely from the food or drink. Because it can be highly hazardous or devastating if not handled properly, this product is only maintained by trained chefs.

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