Size Design
The size design of crude oil storage tanks should be based on the type of crude oil to be stored, the number of tanks, and the available land area. Common tank shapes include vertical tanks and horizontal tanks, with the size typically determined by the tank volume. To ensure the tank's quality and safety, the diameter of a conventional tank should not exceed 80 meters, and the total height should not exceed 30 meters.
Material Selection
The material for oil storage tanks should be selected based on factors such as the properties of the stored crude oil, the storage environment, and the budget. Common materials include carbon steel, stainless steel, fiberglass, and concrete. When selecting the material, considerations should include its corrosion resistance, plasticity, and thermal expansion and contraction properties.
Liner Design
Since crude oil contains certain sand particles, moisture, acidic substances, etc., the interior of conventional storage tanks requires lining materials to protect the tank body from corrosion. Common liner materials include natural rubber, PTFE (polytetrafluoroethylene), butyl rubber, etc. The liner thickness should generally not be less than 3mm to ensure its service life and corrosion resistance.
Anti-Corrosion Measures
To ensure the long-term use of crude oil tanks, a series of anti-corrosion measures should be implemented. First, internal components that are prone to corrosion, such as level gauges, valves, and outlets, need to undergo anti-corrosion treatment. Secondly, effective anti-corrosion coatings should be applied to protect the tank's surface and significantly extend its service life. Lastly, regular maintenance and inspections should be conducted to identify and address any issues, such as tank errors and corrosion.
Conclusion
The design of crude oil storage tanks is a crucial aspect of the oil storage and transportation industry. Key design factors include size, material, lining, and anti-corrosion measures. Only through rigorous design and careful maintenance throughout the operational process can the tank be ensured to function safely, stably, and for an extended period.
Your storage tank application scenario (e.g., storage of crude oil/LNG/chemical media) and capacity requirements vary, so the specification plan will also be exclusively adapted-please let us know your needs, and we will provide you with targeted parameters and quotations.
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FAQ
Q: How do crude oil storage tanks work?
A: Upon being introduced into a storage tank at above atmospheric pressure, crude oil and condensate experience pressure drops which cause gases dissolved in the liquid to vaporize or 'flash' out of the liquid phase and collect in the vapor space between the liquid and the fixed roof of the storage tank.
Q: What is the capacity of a crude oil storage tank?
A: Crude Oil Storage Tank Capacity: Crude oil storage tanks can hold a range from 50,000 to millions of barrels of oil, with sizes often detailed in a crude oil storage tank size chart, like the one shown here.
Q: Do I need planning permission for an oil tank?
A: As of 2022, you won't need planning permission as long as: Your tank does not exceed a 3500-litre capacity. Your tank isn't being stored in front of the main elevation fronting a public road. The height of your tank is not greater than 3 metres.
Q: What is the life expectancy of an oil storage tank?
A: around 20-25 years
While they can last several decades if very well-maintained, most modern oil tanks have a functional lifespan of around 20-25 years, or thereabouts. Older tanks are increasingly prone to corrosion, fatigue and problems if not treated with the proper maintenance and upkeep that they need to continue working.
Q: Why do oil tanks have floating roofs?
A: Floating roofs are made of a structure which floats on the surface of the liquid in order to prevent the formation of a gas overhead, and thus reduces: Fire risks. Atmospheric pollution. Evaporation losses.