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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 with oxygen.
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.

Contents

Table 1: Flame temperatures of common gases and fuels

Table 2: Explosive limits and ignition temperatures of common gases

Table 3: Combustion values of common gases

See also

Table 1: Flame temperatures of common gases and fuels

Gas	Flame temperature
Propane in air	1,980 °C
Butane in air	1,970 °C
Wood in air	1,980 °C
Acetylene in air	2,550 °C
Methane (natural gas) in air	1,950 °C
Hydrogen in air	2,055 °C
Propane with air (in air)	1,995 °C
Acetylene in oxygen	3,100+ °C
Hydrogen with air (in air)	2,111 °C
Propane-butane mix with air (in air)	1,225 °C
Coal in air	1,500 °C (approx.)

Info & Assuming:

★ Adiabatic flame

★ 20 degrees Celsius atmoshpere

★ Complete Combustion (No Soot and more Blue like flame is the key)

★ Peak Temperature

★ Speed of Combustion (Has no effect on temp, but more energy released per sec (As adiabatic) compaired to normal flame)

★ Spectral Bands also effect colour of flame as of what part and elements of combustion

★ Blackbody radiation (colour appearance only because of heat)

★ Atmosphere - effects temp of flame and colour due the the atmoshperic colour effect

Table 2: Explosive limits and ignition temperatures of common gases

	Explosive limits (lower & upper)	Ignition temperatures
Natural gas	4.7 & 15	482 to 632 °C
Propane	2.15 & 9.6	493 to 604 °C
Butane	1.9 & 8.5	482 to 538 °C
Acetylene	2.5 & 81	305 °C
Hydrogen	4 & 75	500 °C
Ammonia	16 & 25	651 °C
Carbon monoxide	12.5 & 74	609 °C
Ethylene	3.4 & 10.8	490 °C

Note: Atmosphere is air at 20 celsius.

Table 3: Combustion values of common gases

Gas	Combustion value
	(Btu/ft³)	(MJ/m³)
Natural gas (methane)	950 to 1,150	35 to 43
Propane-butane mix	2,500 to 3,200	90 to 120
Propane	2,572	95.8
Butane	3,225	120.1

See also

★ Flame

★ ''Pocket Guide to fire and arson investigation,'' second edition, FM Global, Table 2

★ Gas welding