A gas burner is a device to generate a flame to heat up products
using a gaseous fuel such as acetylene, natural gas or propane.
Some burners have an air inlet to mix the fuel gas with air to make
a complete combustion. Acetylene is commonly used in combination
It has many applications such as soldering, brazing and welding,
the latter using oxygen instead of air for getting a hotter flame
which is required for melting steel. For laboratory uses a natural
gas fired Bunsen burner is used. For melting metals with melting
points of up to 1100 °C such as copper, silver and gold a propane
burner with natural drag of air can be used.