Design pressure value for fixed-roof atmospheric oil tanks
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Fixed-roof atmospheric oil tanks are designed such that the lifting force generated by positive pressure does not exceed the total weight of the tank roof and the components supported by it. May I ask whether, based on the definition, it is possible to roughly deduce that the design pressure of all fixed-roof atmospheric oil tanks falls within a certain approximate range? When designing storage tanks, what value is used for the design pressure?
Before the release of GB50341-2014, the pressure was set at 1960 Pa for positive pressure and 490 Pa for negative pressure. The calculation is a direct calculation of negative pressure, without the need for a boundary. In the 2014 version, we still use 1960/-490, but there is a threshold of -250 when calculating the negative pressure
We also use a positive pressure of 1960 Pa and a negative pressure of 490 Pa; after version 14, the negative pressure was set at 250 Pa. It’s just not clear why the positive pressure is set at 1960 Pa