When the tank is full, there is no space for evaporation and the fuel remain as liquid.
When there is space in the tank, the fuel evaporates and the vapor creates a pressure inside the tank. When the temperature goes up, the pressure increases as the gas is expanding faster than the liquid. (you may have experienced a gas exhaust when opening the lid of an empty tank). The pressure can do two things. Wither it can increase and force the tank to blast or when the tank is opened, it can exhaust fuel vapor that can be ignited by the heated air.
What I feel is danger is higher in an empty tank rather than a full tank.
When the tank is full, there is no space for evaporation and the fuel remain as liquid.
When there is space in the tank, the fuel evaporates and the vapor creates a pressure inside the tank. When the temperature goes up, the pressure increases as the gas is expanding faster than the liquid. (you may have experienced a gas exhaust when opening the lid of an empty tank). The pressure can do two things. Wither it can increase and force the tank to blast or when the tank is opened, it can exhaust fuel vapor that can be ignited by the heated air.
What I feel is danger is higher in an empty tank rather than a full tank.
For your thoughts