Natural gas is a clean, low cost, domestically available alternative fuel that can power our vehicles safely and efficiently.
The advantages to our energy independence by reducing foreign oil imports, the reduced cost compared to gasoline and less emissions have been well documented. However, there may still be a misconception about the safety of Compressed Natural Gas (CNG) compared to gasoline.
Is Natural Gas Safe to Use?
All fuel sources contain energy that is released through combustion and any fuel can be potentially dangerous if not properly handled. Throughout time we have learned to harness these fuels for heating, light and powering our vehicles.
The fact is that CNG is safer than gasoline as a vehicular fuel based upon two important facts; the physical qualities of natural gas and the structural integrity of the NGV fueling system.
Natural gas or methane is a non toxic gas that is lighter than air. This means that it will not puddle (like gasoline) or sink to the ground like propane, which is heavier than air. Instead, Natural Gas will rise and dissipate in the atmosphere.
Natural gas also has a higher ignition temperature. This means that it is much harder to ignite. The storage systems used for compressed natural gas are infinitely stronger that the gasoline tanks found on cars and trucks today.
Few Safety Points to Consider
Compressed natural gas (CNG) is generally considered safe when handled and used properly. Here are a few points to consider regarding the safety of CNG:
Physical Properties – CNG is composed mainly of methane (CH4) gas compressed to a pressure of around 3,000 to 3,600 pounds per square inch (psi). It is lighter than air and disperses quickly if released.
Storage and Transportation – CNG is stored in high-strength steel or composite cylinders designed to withstand high pressures. These cylinders undergo rigorous testing and certification to ensure safety.
Fire and Explosion Risks – CNG is less likely to ignite compared to gasoline or diesel because it has a high ignition temperature (approximately 1,202°F or 650°C). However, in the event of a leak and in the presence of an ignition source, it can catch fire. The main concern is not the gas itself, but rather the potential for ignition in poorly ventilated areas.
Ventilation – Proper ventilation is crucial when using or storing CNG indoors. Since CNG is lighter than air, any leaked gas tends to rise and disperse rapidly outdoors. Indoors, however, it can accumulate if not properly ventilated, posing a risk of explosion if ignited.
Overall, while CNG is considered safe when handled correctly and in compliance with safety regulations, it does require adherence to specific safety protocols to minimize potential risks associated with its use.
P.C. McKenzie is proud to represent the Ingersoll Rand line of natural gas compressors for vehicle refueling. Check out our small refueling station today and see if it’s right for your small business!
