Is the CNG option safe?
Four key features make CNG a safer fuel than petrol, diesel or LPG. With specific gravity of 0.587, it is lighter than air so in case of leaks, it rises up and dissipates into air. (Other fuels form puddles on the ground in case of leaks.) CNG has a 700 degree Centigrade ignition temperature compared to 455 degree Centigrade for petrol. The range of 4 to 14 per cent in which CNG mixes with air by volume for combustion is small. Storage is far safer than for petrol, as CNG cylinders are designed and built from special materials and to high safety specifications.
