Oil tank is a type of equipment used for storing and transporting liquid petroleum, chemical, biotechnology, and their derivatives. The type and structure of oil tank are closely related to its purpose and storage capacity. Oil tanks are classified into vertical oil tanks, circular oil tanks, spherical oil tanks, underground oil tanks, and diaphragm oil tanks. They are mainly used for storing petroleum, refineries, fuels, new energy, food, biology, metallurgy, machinery, ports, docks, aviation, medicine, etc., providing enterprises with a green, environmentally friendly, energy-saving, and safe storage and operation environment.
        Double layered oil tanks can be divided into metal tanks and non-metal tanks according to their materials; According to their location, they can be divided into underground oil tanks, semi underground oil tanks, and above ground oil tanks; It can be divided into vertical and horizontal installation forms; It can be divided into cylindrical, box shaped, and spherical shapes.
    ◆  In the double-layer gap of the SF double-layer oil tank, gas or detection liquid with a certain pressure will enter the atmospheric pressure inner tank if there is leakage from the inner tank; The pressure or liquid level inside the double-layer gap will change, triggering the sound and light alarm. After the storage fluid leaks into the double-layer gap, there is no need to worry about the leakage of the storage fluid as the outer tank is intact.
    ◆  Gas or detection liquid with a certain pressure inside the double-layer gap, such as leakage from the outer tank, will enter the soil. The pressure or liquid level inside the double-layer gap will change, triggering the sound and light alarm. Due to the intact inner tank and worry free liquid storage, only gas or detection liquid enters the soil.
    ◆  Due to the fact that the storage liquid in contact with the inner tank and the soil and groundwater in contact with the outer tank belong to different media, the corrosion rate of the tank material is different, and the probability of leakage occurring at the same time is almost zero. Therefore, perfectly preventing the leakage of stored liquid outside the tank is a comprehensive solution to the hidden dangers of product safety and green environmental protection.