Carbon dioxide extinguishes work by displacing oxygen, or taking away the oxygen element of the fire triangle. The carbon dioxide is also very cold as it comes out of the extinguisher, so it cools the fuel as well.
Why carbon dioxide is considered as the best fire extinguisher?
As Fire needs oxygen to burn, Carbon Dioxide Covers the fire like an blanket and cuts the contact of fire to the oxygen present in the air, So Fire stops burning. That is why Carbon Dioxide is Considere as the best Fire Extinguisher.
Why is CO2 used in fire extinguishers instead of nitrogen?
Carbon dioxide is the most commonly used “inert” gas extinguishing agent, followed by nitrogen (Friedman 1992). … However, because carbon dioxide is 1.57 times heavier than nitrogen [44 and 28 molecular weight (MW), respectively] for a given volume, the two gases have nearly equivalent effectiveness on a weight basis.
What is a carbon dioxide extinguisher used for?
CO2 fire extinguishers contain pure carbon dioxide which is a clean extinguishant, leaving no residue. Suitable for class B flammable liquid fires (petrol, oil, solvents), and recommended for use on live electrical equipment.
When should you use a carbon dioxide fire extinguisher?
CO2 fire extinguishers are mainly aimed at electrical fires but are also suitable for Class B liquid fires and are used in different ways depending on the type of fire they are being used on. Do not use CO2 extinguishers in small rooms as CO2 gas is poisonous at only 4% concentration and can kill at just 8%.
Can CO2 be used as a fire extinguisher?
Carbon dioxide extinguishes work by displacing oxygen, or taking away the oxygen element of the fire triangle. … CO2s may be ineffective at extinguishing Class A fires because they may not be able to displace enough oxygen to successfully put the fire out. Class A materials may also smolder and re-ignite.
Why CO2 is not used in inert gas?
Carbon dioxide – An inert gas becomes active
During welding, CO2 can be used in combination with argon or helium. But it is very important to note that carbon dioxide loses its shielding gas character at higher temperatures and becomes an (partially) active gas. … The downside can be a more brittle weld.
What is a disadvantage of carbon dioxide fire extinguishers OSHA?
Disadvantages Of Carbon Dioxide Extinguishers
As CO2 works by displacing the oxygen around the fire, it is not suitable for outdoor use, or in environments exposed to windy conditions. CO2 is a high pressured extinguisher. Using it on class A fires or class F fires could cause the fire to spread.
What should you not use a carbon dioxide extinguisher on?
Dangers: CO2 extinguishers should not be used on fires involving solid materials, such as paper, wood and fabric, and also are not suitable for use on flammable gases.
What type of extinguisher is carbon dioxide?
A carbon dioxide (CO2) fire extinguisher is typically used for Class B (flammable liquids and gases) and Class C (energized electrical) fires. Fire Extinguisher Questions? Carbon dioxide extinguishers are filled with non-flammable carbon dioxide gas.