The design configuration of API 620 tank requires that you have a raised or flat bottom, and a single, vertical, centered axis of rotation, with a minimum material thickness of 3/16 inch.
API 620 tank is made of carbon steel, austenitic stainless steel and nickel alloy (low temperature only). API 620 tank can store any liquid.
API 620 tank is used for products with high internal pressure, such as liquefied natural gas (LNG) and cryogenic tanks.
API 620 tank can store contents at higher pressure (maximum 15 pounds per square inch (PSI) of gas or steam storage) and lower temperature (-325 degrees Fahrenheit to 250 degrees Fahrenheit) than API 650 tank.
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