API 650 stainless and carbon steel tank structural period of vibration
The liquid level of API 650 oil storage tank is covered by floating roof. The storage liquid of API 650 oil storage API 650 stainless and carbon steel tank tank is isolated from the air, reducing air pollution, fire and explosion hazards, and easy to ensure the quality of liquid storage. It is especially suitable for the API 650 stainless and carbon steel tank storage of high-grade gasoline, jet fuel and toxic and easily polluted liquid chemicals.
Foundations and subgrade shall safely carry the weight of the tank API 650 stainless and carbon steel tank and its contents when the tank is filled with water to the highest level required for a hydrostatic test or other water-loading operations, even though the tank itself may be designed for some lesser density of liquid. However, in cases where the character of the soil justifies it and a competent soil expert advises it, allowance may be made for the relatively short duration and intermittent nature of the water loadings if suitable account is taken of all such loadings that may be expected to occur during the life of the tank, including not only those loadings that are incidental to periodic repetitions of the hydrostatic test in accordance with 7.18 but also water-filling operations for gas-freeing purposes.
Under the condition of static storage without receiving and sending operation, the temperature of gas space, evaporation rate, depth and pressure of vapor in the API 650 stainless and carbon steel tank will change with the change of temperature and pressure in a day. The oil loss caused by the process of discharging oil vapor and inhaling air gas is called "small breathing" loss, which is also called static storage loss of oil tanks.
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