CNG General Safety Information
Danger: Natural gas is highly flammable. Failure to observe the following safety precautions could lead to the ignition of the natural gas, which could cause serious bodily injury or death.
Since compressed natural gas is highly flammable, if you should smell gas, immediately shut off all engines and ignition sources. Avoid causing sparks, and stay away from arcing switches and equipment. Extinguish any cigarettes, pilot lights, flames, or other sources of ignition in the area and adjacent areas. Immediately provide extra ventilation to the area. Do not start the engine or any other type of equipment until the gas leak is corrected and the area cleared of natural gas.
Natural gas is odorless before a scent is added for safety. Natural gas is also colorless and nontoxic. Still, at high enough concentration, natural gas can suffocate a person simply by excluding adequate oxygen to sustain life.
Natural gas is flammable in concentrations ranging from 4 percent to 16 percent by volume in air.
Warning: When bleeding the dispensing hose after filling the tank, the handle gets extremely cold. This may freeze the hands if appropriate safety gloves are not used.
When filling the vehicle tanks with compressed natural gas (CNG), vent the dispensing hose before disconnecting it from the vehicle. The pressure in the hose may cause a disconnected hose to become uncontrollable.
CNG storage tanks have a limited usable life-span, due to the high pressures that they must sustain. Periodic inspections are required by law to ensure continued safety in their use.
If a tank receives an impact or has deep scratches or gouges, it should be inspected before refilling.