What are the risks of using a CO2 fire extinguisher?
Cons
- A risk of the user getting a cold burn if the extinguisher is held by the horn.
- They are not as environmentally friendly as other extinguisher choices.
- They pose a risk of asphyxiation in confined spaces since they work on the principle of replacing oxygen with carbon dioxide.
When using a CO2 extinguisher What should you avoid?
Be careful not to splash the burning liquid with the powerful jet of the CO2 extinguisher. Electrical equipment: Switch off the power, where safely possible, to prevent later re-ignition and then direct the horn straight at the fire.
What happens when you use a CO2 fire extinguisher?
Unlike water and foam extinguishers, CO2 fire extinguishers do not work by cooling the fire and so are ineffective on fires involving flammable solids. Instead, CO2 extinguisher work by replacing the oxygen surrounding the flames with carbon dioxide, meaning the fire can no longer burn.
What must you remember when using a CO2 extinguisher to tackle electrical fires?
For electrical fires you should switch off the appliance in question if it is safe to do so. If you’re using one on a liquid fire take care not to splash any burning liquid onto any nearby areas. If the fire isn’t extinguished when the extinguisher has run out, use another if there’s one to hand.
What is true about CO2 fire extinguishers?
CO2 displaces the oxygen to extinguish the fire.
When the CO2 gas is released from the extinguisher it looks like dry ice. This “cloud” of CO2 reduces the oxygen in the air around the fire and smothers it. This type of extinguisher does not work well outside due to wind drift.
Why do you need to take care when using a CO2 extinguisher?
Firstly, avoid holding a CO2 fire extinguisher by the horn, as this could cause cold burns, resulting in a nasty injury and the risk of you dropping the extinguisher. If this happens it could render the extinguisher useless and the fire could spread. Therefore, you need to handle it with care.
What is the danger faced in CO2 portable extinguisher is used in confined spaces?
When a CO2 extinguisher is used in a confined space there is danger that the user may become overwhelmed by the sudden increase in carbon dioxide emissions. This occurs as CO2 is an asphyxiant, and the confined space means oxygen will be replaced by the CO2 much faster.
Does CO2 fire extinguisher leave residue?
While CO2 extinguishers are capable of extinguishing flammable liquid fires such as petrol and diesel they are mainly used on fires involving live electrical equipment. CO2 extinguishers are the most popular choice for covering the risk of electrical fires. They do not leave any residue when being discharged.
How long does a CO2 fire extinguisher last when activated?
The approximate discharge time for 10 to 20 pounds of dry chemical ranges from 10 to 25 seconds. Once activated, can an ABC extinguisher be turned off? Yes, stop squeezing the trigger and the dry chemical stream will stop. This may be appropriate if you must reposition yourself in relation to the fire.
How long can a CO2 fire extinguisher be used for?
10 years
Maintenance of a CO2 fire extinguisher
However, unlike most other extinguisher types, they do not require refilling after 5 years but 10 years instead, which saves costs. At the end of the ten years, they have to be re-furbished, so the replacement of the CO2 fire extinguisher after 10 years is usually recommended.
Can you use a CO2 extinguisher in a confined space?
It is advised not use a CO2 fire extinguisher in a confined space, as it displaces oxygen and could lead to asphyxiation.
How long does a CO2 fire extinguisher spray?
The approximate time of discharge for the 10 to 15 pounds of CO2 ranges from 8 to 30 seconds. Once activated, can a CO2 extinguisher be shut off? Yes, stop squeezing the trigger and the stream of CO2 will stop. This may be appropriate if you must reposition yourself in relation to the fire.
How long does it take to discharge a CO2 fire extinguisher?
The discharge time of a CO2 fire extinguisher is only 6 seconds, so the extinguisher is used only to fight a fire when it is still restricted to an electric item, such as a computer.
Why do CO2 extinguishers have a horn?
Carbon Dioxide extinguishers are filled with non-flammable carbon dioxide gas under extreme pressure. You can recognize a CO2 extinguisher by its hard horn and lack of pressure gauge. The pressure in the cylinder is so great that when you use one of these extinguishers, bits of dry ice may shoot out the horn.