Fire Extinguisher Hazards

Fire extinguishers are present in most public buildings and offices, as well as in private homes. They are used to combat the outbreak of small, manageable fires. With incorrect usage or maintenance, extinguishers can prove to be dangerous to untrained users. People should familiarize themselves with the correct operation of a fire extinguisher before the need arises to use one in an emergency.

Using the Wrong Type

• There are four main types of fire extinguishers: water extinguishers, dry chemical extinguishers, carbon dioxide extinguishers and sand extinguishers. Using the correct extinguisher on a certain type of fire is essential if you do not want to cause further damage. Water extinguishers, for example, should not be used on electrical fires, as this can cause electric shocks; when used on oil or fat fires, they can cause explosions.

Other Considerations

• There are inherent hazards associated with certain types of extinguisher. For example, users of carbon dioxide extinguisher should ensure that they are do not breathe in too much of the gas; this can lead to asphyxiation or even death, if you are in a confined or unventilated room. The gas is compressed under very cold temperatures, and users can suffer from frostbite if the extinguisher is used incorrectly. When using dry chemical extinguishers, users should ensure that the fire is actually out, as these extinguishers have only a limited cooling effect.

Incorrect Maintenance

• Fire extinguishers should be properly maintained and checked at least once a month. This should include looking to see if the extinguisher is in an easy-to-reach place, the nozzle is working, the pin and tamper seal are intact, and that the pressure is at the recommended level. After a number of years, all fire extinguishers should be pressure-tested to ensure that the cylinder is safe to use. Extinguishers that have been subjected to rust or other corrosion and/or have incorrect pressures can explode, causing injury and even death.