API standard 650 SUG III tanks fabricator

The main reason of "small breathing" loss of API standard 650 SUG III tanks is the change of atmospheric temperature. When the temperature rises with the increase of solar radiation from dawn, the temperature of oil in the API standard 650 SUG III tanks also changes, resulting in the acceleration of evaporation speed and the increase of evaporation pressure. When the pressure exceeds the positive pressure rating of the breathing valve, the oil-gas mixture in the API standard 650 SUG III tanks is discharged into the atmosphere through the breathing valve, which is the "exhalation" process of the oil tank.

Selection of nominal diameter D of API 650 storage tank. In the design calculation of API 650 storage tank, the bottom plate thickness is the net plate thickness, that is, the actual thickness minus the corrosion allowance. In the design and calculation of API standard 650 SUG III tanks wall thickness in hydrostatic test, the thickness of bottom plate is the total thickness of steel plate.

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