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Types of explosion other than fuel-oxidant
Chemical explosions are not always produced by a fuel-oxydant reaction, they
can appear when an exothermic reaction proceeds without control so that a
runaway reaction can be developed. Also, chemical reactions at atomic or nuclear
level do not need the presence of fuel and oxidant. Physical explosions are not
produced by the chemical reaction between a fuel and an oxidant. They occur due
to physical energy release, for example, when vessels are pressurized beyond
their limits and rupture. A flammable vapour-air mixture explosion is an example
of this. When a liquid contained in a vessel is heated above its atmospheric
boiling point a BLEVE, or boiling liquid expanding vapour explosion, can occur.