Why Oxygen tanks can explode if the gas is ignited ?

Oxygen tanks can explode if the gas is ignited because of the role oxygen plays in the combustion process. Combustion is a chemical reaction that occurs when a fuel is heated to its ignition point in the presence of oxygen. The reaction releases energy in the form of heat and light, which we recognize as fire.

In a normal atmosphere, which is about 21% oxygen, combustion can occur when a fuel source reaches the necessary conditions. However, in an environment where there is a higher concentration of oxygen, such as inside an oxygen tank, the combustion process can be much more intense. If a spark or flame comes into contact with the oxygen under pressure in the tank, the rate of combustion can increase dramatically, causing a rapid release of energy. This can lead to an explosion if the tank's structural integrity is compromised by the force of the combustion.

Additionally, the high pressure inside an oxygen tank means a lot of oxygen is stored in a small volume. When an ignition source is introduced, the potential for a high-energy release through rapid combustion is significantly increased. If the tank ruptures, this stored energy is released all at once, causing an explosion. Tank materials can also play a role, as some materials may react with oxygen, especially under high pressure, which can also lead to a risk of explosion.