Why do gas stations regularly clean oil storage tanks?

The cleanliness of the oil storage tank at the gas station will affect the quality of the oil. During the use of the long-term untreated double-layer oil storage tank, there will be many problems such as pipeline blockage, scaling, corrosion, and poor quality of the oil. Corrosion and leakage of oil tanks can easily cause dangerous situations such as crude oil pollution and hidden safety hazards. Generally, the service life of double-layer oil storage tanks is relatively long. After a period of use, impurities in crude oil will be deposited on the bottom and the wall of the tank, resulting in a decrease in the effective capacity of the oil storage tank, which greatly affects the efficiency of the oil storage tank.