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Agas burner is a device that produces a non-controlledflame by mixing afuel gas such asacetylene,natural gas, orpropane with an oxidizer such as the ambientair or suppliedoxygen, and allowing forignition andcombustion.

The flame is generally used for the heat, infrared radiation, or visible light it produces. Some burners, such asgas flares, dispose of unwanted or uncontainable flammable gases. Some burners are operated to producecarbon black.

The gas burner has many applications such assoldering,brazing, andwelding, the latter usingoxygen instead of air for producing a hotter flame, which is required for meltingsteel. Chemistry laboratories use natural-gas fueledBunsen burners. In domestic and commercial settings gas burners are commonly used ingas stoves andcooktops. For melting metals with melting points of up to 1100 °C (such ascopper,silver, andgold), a propane burner with a natural drag of air can be used. For higher temperatures, acetylene is commonly used in combination with oxygen.

The above data is given with the following assumptions:

• The flame isadiabatic
• The surrounding air is at 20 °C, 1 bar(atm)
• Complete combustion (no soot, and more blue-like flame is the key) (Stoichiometric)
• Peak Temperature These notes are not assumptions, and need more clarification:
• Speed of Combustion (has no effect on temperature, but more energy released per second (as adiabatic) compared to normal flame)
• Spectral bands also affect colour of flame, as of what part and elements of combustion
• Blackbody radiation (colour appearance only because of heat)
• Atmosphere - affects temperature of flame and colour due to the atmospheric colour effect

(Atmosphere is air at 20 degrees Celsius.)

• Pocket Guide to Fire and Arson Investigation, second edition, FM Global, Table 1, 2, and 3
• Gas burner at the Encyclopædia Britannica

• Burners
• Fuel gas
• Tools
• Welding
• Methane
• Acetylene
• Propane
• Butane

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