LPG propane also burns with a blue flame colour. See the flame color temperature chart below. You get a blue gas flame with a hydrocarbon gas when you have enough oxygen for complete combustion. When you do have sufficient oxygen, the gas flame appears blue because complete combustion creates enough energy to excite and ionize the gas molecules in the flame.
What colour is natural gas can be answered in two ways. Natural gas itself is a colourless gas whilst a natural gas flame burns with a blue colour. Gas that burns with a blue flame includes pure hydrocarbons like methane refined natural gas , propane, butane and ethane.
These gases come from raw natural gas processing and oil refining. These gases are all alkanes and are gas with a blue flame. LPG — propane — and natural gas methane gas both burn with a blue flame color. Red flames or propane-natural gas flame color orange, instead of a blue flame, may mean signs of incomplete combustion, wasted gas and a serious safety hazard.
With hydrocarbon flames, such as gas, the amount of oxygen supplied with the gas determines the rate of gas combustion, flame colour and temperature. In all but exceptional cases, like decorative LPG-propane gas fireplace flame colour, you always want a blue flame colour from a gas appliance burner.
On the following gas flame color temperature chart fire color chart , red flames or a yellow natural gas or LPG — propane gas flame color is indicative of incomplete combustion and carbon monoxide emissions. As it relates to hydrocarbon gases, blue flame is indicative of complete combustion whilst a yellow flame indicates incomplete combustion. The flame colour changes to orange, yellow or red flame and the flame wavers. Natural gas flame color orange indicates incomplete combustion.
See the flame color temperature chart below:. Propane gas furnace flame color is the same as propane flame color. A gas fireplace flame color is yellow or red flames and is the exception to the rule.
Gas fireplace flame color is typically designed to burn with red flames, not blue flame, for a more natural look. Wood logs do not burn with a blue flame colour, so a gas fireplace needs yellow or red flames for a realistic look and feel. It is also engineered to operate safely with yellow or red flames. This means that the gas fireplace flame colour breaks the rule of having a blue flame.
They are also flued so there are no indoor emissions issues, should they produce some CO from the red flames. Propane fireplace flame colour is typically yellow, as propane fireplace flame colour is designed to burn with a more natural look.
As wood logs do not burn with a blue flame colour, neither should a simulated wood fire. A propane fireplace needs yellow or red flames for a realistic look and feel. It is also engineered to operate safely with yellow or red flames, with a flue to eliminate indoor emissions. A gas cooker yellow flame indicates a combustion problem.
A gas cooker or stove should have a blue flame. Propane torch flame temperature colour would also be blue flame. See the flame color temperature chart above. The amount of oxygen supplied with the gas is the most important factor in determining the colour of the flame. Those bits of carbon get hot and glow, making the yellow light that you see. Once they cool a bit, those bits of carbon - and other unburnt stuff that isn't carbon dioxide or water vapor - also go into making smoke, which is why the clean, blue flames are smokeless, while the dirty, yellow flames come with smoke.
You can easily do a little experiment at home to see this for yourself. Hold a spoon in a clean flame - a little bit of burning alcohol, say, or the gas flame of a stove - and you'll see that it comes back out fairly clean. If you hold the same spoon in the light of a candle or a match you'll find it comes out covered in soot.
Toggle navigation. What colour should gas stove flames be? Yellow or red Gas flames should be blue but can sometimes burn red or yellow. What does a blue flame mean? During complete combustion, an LPG flame burns at around 1, degrees C. For natural gas, the flame is around 1, degrees C. What does a red or yellow flame mean? Yellow or red flames only burn at around 1, degrees C. This flame is dangerous as it produces more poisonous carbon monoxide gas. Why should my flame be blue?
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