169、classification and characteristics of storage tanks - doer equipment
classification：industry publishtime：2021-01-30 14:28:07
classification and characteristics of storage tanks
cryogenic tank is a kind of special container for storing cryogenic liquid. in order to meet the requirements of different media, it can be divided into many kinds of storage containers.
according to manufacturing materials: non metal storage tank, plastic shock proof storage tank, soft storage tank, metal storage tank (steel shell lining, aluminum and alloy, etc.).
according to pressure:
atmospheric storage tank: when the gas side pressure of the storage tank is the same as atmospheric pressure or less than 1 / 3 atmospheric pressure (gauge), it is called atmospheric storage tank.
low pressure storage tank: when the atmospheric pressure is greater than 1 / 3 (gauge) and less than 0.1mpa, it is called low pressure storage tank.
it can be seen that the working pressure of low pressure tank is higher than that of atmospheric tank, but the pressure is less than 0.1mpa.
according to the environment: above ground storage tank, semi underground storage tank, underground storage tank, in hole storage tank and in sea storage tank
aboveground storage tank: the bottom of the storage tank is located at or above the design elevation of ± 0.00; the tank bottom is below ± 0.00 of the design elevation but not more than 1 / 2 of the tank height, which is also called ground tank.
semi underground storage tank: it means that the storage tank is buried in the ground more than 1 / 2 of its height, and the maximum height of the liquid level of the tank is not more than 0.2m above the design elevation ± 0.00.
underground storage tank: refers to the oil tank whose liquid level is 0.2m below the design elevation of ± 0.00.
according to geometry:
vertical cylindrical tank: according to its roof structure, it can be divided into fixed roof tank (cone roof tank, dome roof tank, umbrella roof tank, reticulated roof tank (spherical reticulated shell), drop shaped tank) and movable roof tank (external floating roof tank, internal floating roof tank).
horizontal cylindrical tank: suitable for storing liquid with small capacity and high pressure.
spherical tank: it is suitable for storing liquid with large capacity and certain pressure, such as liquid ammonia, liquefied petroleum gas, ethylene, etc.
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