Gas explosion

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A gas explosion is an explosion resulting from mixing a gas, typically from a gas leak, with air in the presence of an ignition source. [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 (American English)/petrol (British English) or ethanol play an important role. Industrial gas explosions can be prevented with the use of intrinsic safety barriers to prevent ignition.

Contents

Lower and upper explosive limits

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. For example, for methane and gasoline vapor, this range is 5-15% and 1.4-7.6% gas to air, respectively. An explosion can only occur when fuel concentration is within these limits.

List of gas explosions

The damaged roads after gas explosions in Kaohsiung, Taiwan, on 31 July 2014. Sanduo 1st Road after Explosion Record 20140811-021.JPG
The damaged roads after gas explosions in Kaohsiung, Taiwan, on 31 July 2014.

1900–1950

1950–2000

2000s

2010s

2020s

Aftermath of the 2020 gas explosion in Rua de Santa Marta, Lisbon Rua de Santa Marta 2021-01-06.png
Aftermath of the 2020 gas explosion in Rua de Santa Marta, Lisbon

See also

References

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