The issue of the relationship between volume expansion and temperature of liquefied petroleum gas
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The volume expansion coefficient of the liquid is 10–16 times that of water under the same conditions; for every 1-degree increase in temperature, its volume expands by 0.3%–0.4%. So, by how much does the expansion pressure of the liquid increase per 1-degree rise in temperature?
Clapeyron equation: P1V1/T1 = P2V2/T2
Gasoline and diesel are around 0.06% to 0.08%.
Regulations regarding the filling of liquefied petroleum gas containers specify that they must not be filled to capacity, with the filling level to be less than 85%； If the container is not filled to capacity and there is gas space, then the pressure inside the container is determined only by the pressure of the gas phase (saturation temperature) ； In industrial production, LPG containers cannot be filled to capacity with liquid; from a factory management perspective, the liquid can be considered incompressible. If the container is filled to capacity, an increase in temperature will cause a sharp rise in pressure, leading to the container breaking.