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Comparison with natural gas

Precaution while using LPG

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Comparison with natural gas

LPG is composed primarily of propane and butane, while natural gas is composed of the lighter methane and ethane. LPG, vaporised and at atmospheric pressure, has a higher calorific value (94MJ/m3 equivalent to 26.1kWh/m3) than natural gas (methane) (38MJ/m3 equivalent to 10.6kWh/m3), which means that LPG cannot simply be substituted for natural gas. In order to allow the use of the same burner controls and to provide for similar combustion characteristics, LPG can be mixed with air to produce a synthetic natural gas (SNG) that can be easily substituted. LPG/air mixing ratios average 60/40, though this is widely variable based on the gases making up the LPG. The method for determining the mixing ratios is by calculating the Wobbe index of the mix. Gases having the same Wobbe index are held to be interchangeable.


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Allow clear access to your property
Liquefied petroleum gas or liquid petroleum gas
Check the level of gas in your cylinders
Used correctly
Should not keep any hot flames
Cylinders should never be placed in closed areas
Safety Tips
Keep children away from all LPG appliances
Exchange cylinders
How to handle LPG safely
Plan to order earlier in winter
Switch off the cylinder valve
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