Crude oil storage tank is a large container with regular shape for storing crude oil or other petroleum products. Crude oil storage tank is used in refineries, oil fields, oil depots and other industries.
The American Petroleum Industry (API) has established standards for the design, fabrication and construction of welded steel storage tanks for storing oil. The most popular crude oil storage tanks available on the market today are API 650, API 620 and API 12D.
API 650 standard crude oil storage tank:
API 650 is the standard governing welded tanks for oil storage. It dictates tank design, fabrication, welding, inspection, and erection requirements. API 650 is widely used for tanks that are designed to internal pressures of 2.5 PSI or less and store products such as crude oil, gasoline, chemicals and produced water.
API 620 standard crude oil storage tank:
API 620 regulates the design and manufacture of large steel low-pressure storage tanks, usually larger than 300 feet in diameter. API 620 tanks operate at 250°F or less with an operating pressure of up to 15 PSI. API 620 tanks are generally utilized for Liquefied Natural Gas (LNG) storage as well as other chemicals which require internal design pressures in excess of those allowed by API 650.
API 12D standard crude oil storage tank:
API 12D standard is utilized in the fabrication and erection of field welded tanks for storage of production liquids. In general, API 12D standard is commonly used by upstream petrochemical companies. The API 12D standard is to field erected tanks as API 12F is to shop built tanks. API 12D predetermines tank dimensions, design pressure and vacuums, with accessories and testing requirements. This eliminates the need for further engineering, effectively reducing the cost of each tank.
