What is the chemical composition of CNG?
Natural gas consists of about 90% methane. Natural Gas, in its natural form, does not smell. Therefore, the gas is odorised prior to distribution in order to detect possible leakage. Gas can therefore be smelled already at a concentration of 0.3%. As CNG requires a concentration of about 5% to 15% to combust, 0.3% is far below the dangerous combustion level.
