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Five Characteristics of Oil Fire and Explosion

Aug. 03, 2020

1. Explode after burning. A fire occurs in an oil tank and an explosion occurs during the combustion process. The main reason is that the space on the liquid surface of the oil tank has a high concentration of oil vapor and burns under certain conditions. During the combustion process, because a large amount of air enters the tank, the oil vapor concentration reaches the explosive limit range and explodes at the moment of combustion. Our company provides non-sparking tool.

2. Burn after the explosion. The oil tank fire exploded first and then burned violently. This is because the liquid surface space in the tank is filled with a large amount of mixed gas of oil vapor and air. When the explosion limit is reached, it will explode with fire, generating high temperatures and heating the crude oil, causing the oil vapor to increase rapidly, and burning violently in ample space.

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3. Stable combustion. The oil level in the oil tank is high, and the air volume on the liquid surface is less. The mixed concentration of oil vapor and air in the liquid surface space does not reach the explosion limit range. When it comes to an open flame source, it only burns stably on the surface of the tank. If during the combustion process, the concentration of oil and gas never reaches the explosive limit range, then this combustion will continue until the crude oil is burned out.

4. No longer burn after the explosion. The temperature of the crude oil in the oil tank is lower than the flashpoint, and the vapor concentration is within the explosion range. The liquid level in the tank is very low or there is only oil vapor in the explosive mixture. There is no oil storage. When exposed to an open flame, it will cause an explosion and no longer burn. In addition, when the concentration of oil vapor in crude oil or heavy oil tank is close to the lower limit of the explosion, it will cause an explosion when meeting the ignition source. However, because the evaporation rate of crude oil cannot keep up with the amount of oil vapor required for combustion or the air supply is insufficient, the combustion cannot continue after the explosion.

5. The burning flame fluctuates. When a fire occurs in a crude oil tank, the flame tends to fluctuate during the combustion process. When the fire is large, the flame is tall and violent, the burning speed is fast, and the radiant heat is strong; when the fire is small, the burning fire is reduced, the burning speed is slow, and the flame is short. The reason is that crude oil contains different light and heavy components.

The above information is provided by the non-sparking tool factory.

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