1. According to the manufacturing materials:

　　Nonmetal storage tank, plastic shock proof storage tank, soft storage tank, metal storage tank (steel shell lining, aluminum alloy, etc.).

　　2. By pressure:

　　Atmospheric storage tank: when the gas phase side pressure of the storage tank is the same as less than 1 / 3 atmospheric pressure (gauge), it is called atmospheric storage tank.

　　Low pressure storage tank: when it is greater than 1 / 3 atmospheric pressure (gauge) less than 0.1MPa, it is called low pressure storage tank.

　　It can be seen that the working pressure of low-pressure storage tank is greater than that of atmospheric storage tank, but its pressure is less than 0.1MPa.

　　3. According to the environment:

　　Aboveground storage tank, semi underground storage tank, underground storage tank, in hole storage tank above ground storage tank in the sea: refers to the tank bottom at the design elevation of ± 0.00 above; the tank bottom below the design elevation of ± 0.00 but more than 1 / 2 of the tank height, also known as above ground tank.

　　Semi underground storage tank: refers to the storage tank buried in the ground 1 / 2 of its height, the large height of the liquid level of the tank does exceed 0.2m above the design elevation of ± 0.00.

　　Underground storage tank: refers to the tank whose liquid level is 0.2m below the design elevation ± 0.00.

　　4. According to geometry: vertical cylindrical tank:

　　According to the tank top structure, it can be divided into fixed roof tank (cone roof tank, dome roof tank, umbrella roof tank, dome roof tank (spherical reticulated shell), drop roof tank movable roof tank (outer floating roof tank inner floating roof tank).

　　Horizontal cylindrical tank: suitable for storing liquid with small capacity high pressure.

　　Spherical tank: it is suitable for storing liquids with large capacity certain pressure, such as liquid ammonia, LPG, ethylene, etc.