Why do gas tanks catch fire or even explode?

Causes of gas tank fire or even explosion:

The gas tank (liquefied gas tank) is filled with pure gas (liquefied gas), which does not contain oxygen, and the pressure far exceeds the outside world. Therefore, when the bottle is ignited, the combustible gas jetted at high speed contacts the air and is heated, which meets the three conditions of combustion and will form a terrible huge flame.

But this heat is transferred to the combustible gas in the fuel tank, but it can't burn: there is no combustion improver in the fuel tank, and it can't burn without one of the three conditions. In other words, combustion can only occur where the gas touches the air, and it cannot be burned without touching the air.

Correct procedures for safe use of gas:

(1) When using gas, the operating rules of "fire equals gas" shall be strictly observed;

(2) first ignite, put it into the furnace, and start the gas switch from small to large until the gas burns completely;

(3) When igniting and conveying gas, pay attention to that the flame is instantly ejected from the fire, and the face cannot be close to the furnace mouth when the gas is ignited;

(4) When the fire goes out, the master brake should be completely closed;

(5) Observe the gas and check whether the pipeline switch is dead. After work, someone will check whether the stove is completely extinguished before leaving.