Gas explosion

[1] In household accidents, the principal explosive gases are those used for heating or cooking purposes such as natural gas, methane, propane, butane.

In industrial explosions, many other gases, like hydrogen, as well as evaporated (gaseous) gasoline or ethanol play an important role.

Whether a mixture of air and gas is combustible depends on the air-to-fuel ratio.

For each fuel, ignition occurs only within a certain range of concentration, known as the upper and lower flammability limits.

An explosion can only occur when fuel concentration is within these limits[citation needed]

A balloon filled with gaseous hydrogen exploding.
The damaged roads after gas explosions in Kaohsiung , Taiwan , on 31 July 2014.
Aftermath of the 2020 gas explosion in Rua de Santa Marta , Lisbon
Aftermath of the 2023 gas explosion in the Paris American Academy