The smell that people associate with natural gas is added to it for safety reasons. Natural gas is clear and odourless, in its natural state. Incomplete combustion of LPG Formula results in hazardous carbon monoxide: LPG Gas + Oxygen = Water + Carbon Dioxide + Carbon Monoxide + Heat with Yellow Flame What Colour is Natural Gas When comparing different gases, you will discover that they required different amounts of air for complete combustion. What you didn’t see was that incomplete combustion was also producing dangerous carbon monoxide. This type of red flames only burns at around 1,000 ☌, as noted on the flame color temperature chart.ĭepending on the lighting, you may have actually seen the soot rising from the flame. The yellow or red flames are due to incandescence of very fine soot particles that are produced in the flame. A blue flame is indicative of complete combustion vs a yellow flame or orange flame. Propane is a hydrocarbon, containing carbon atoms. Yellow or Red Flames Means Incomplete CombustionĪ orange, yellow or red flames means incomplete combustion of the gas.Īgain, remembering back to high school, if you starved the Bunsen burner of air, the combustion process was incomplete and the gas flame colour burned as sooty yellow or red flames and at a cooler temperature.Ī blue flame indicates complete combustion of the carbon, which is why you see a blue flame with gas appliances. When you adjusted the Bunsen burner to increase the air supply you got more complete combustion, less soot, a higher temperature and a blue flame colour. If you ever took a high school chemistry class and had a chance to use a Bunsen burner, you know how adjusting the air (oxygen) supply affects the colour and temperature of the flame. These gases come from raw natural gas processing and oil refining.Īn LPG burns with a blue flame at a temperature of around 1,980☌, as noted on the flame color temperature chart.įor Natural Gas (Methane), the blue flame temperature is about 1,960☌. These gases are all alkanes and are gas that burns with a blue flame. What Does Blue Flame Mean – Blue Flame Means Complete CombustionĪ blue flame means complete combustion of the gas. With complete combustion, LPG (Propane) burns with a blue flame. Pure hydrocarbons like methane (refined natural gas), propane, butane and ethane gases also burn with a blue flame. A blue gas flame colour is also indicative of complete combustion. Hydrocarbon gases burn blue whilst wood, coal or candles burn yellow, orange or red. For example, a blue flame is the hottest followed by a yellow flame, then orange and red flames. Flame Colour Meaningįlame colour meaning can be indicative of temperature, type of fuel or the completeness of combustion. Gas normally burns with a blue flame but sometimes it burns with yellow or red flames when there is a problem. Red flames and yellow gas flames… not so much… Blue flame vs red flames is an issue of safety, proper combustion and saving gas. Blue flame vs orange flame, blue flame vs red flames and blue flame vs yellow flame are all the incomplete combustion issue. Red flames or yellow gas flame color may be a sign of incomplete combustion, wasted gas and a serious safety hazard. A blue flame color and temperature means complete combustion. LPG (propane) and natural gas (methane) flame colour are both blue. Blue Flame vs Yellow Flame vs Red Flames – Gas Flame Color Blue flame vs yellow flame color is a question of complete combustion vs incomplete combustion.
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