1. The function of the breathing valve is to adjust the pressure in the tank. When the pressure in the tank is high, part of the excess oil and gas will be discharged through the breathing valve to reduce the pressure in the tank and prevent safety problems; when the pressure in the tank is too low, pass the breathing valve Inhale air from the outside of the tank to increase the pressure in the tank and always maintain a constant state with the atmospheric pressure, thus ensuring the safety and reliability of the tank. After the storage liquid of the double-layer tank leaks into the double-layer gap, the storage liquid will not leak out because the outer tank is intact. Therefore, the storage liquid, soil and groundwater are safe. Double-layer tanks refer to three types: SS storage tanks, SF storage tanks, and FF storage tanks. Choose medium and coarse sand for the decoration of the gas station, with a thickness of 200~250mm, and use a flat shaker to sprinkle water to ram it. The fire extinguisher is used to prevent accidents caused by sparks, air passing through the safety valve (function: control pressure does not exceed the specified value) or breathing valve into the tank. It is installed under the breathing valve or safety valve.

2. The drain pipe is used to remove the sedimented water at the bottom of the tank.
3. The oil measuring hole is used to measure the liquid level, temperature and sampling of the oil in the tank. The oil measuring hole is generally connected with an instrument that measures the liquid level. Usually installed near the tank top platform. The manhole of the large oil storage tank is designed for the operation control personnel to inspect, clean and repair the oil tank in and out.
There will be certain safety hazards in the area of the oil tank. Generally, various open flame warnings will be posted around to ensure safety. The double-layer tank explains and what are the common shapes of the oil tank?