All extinguishers do not work equally. Fire extinguishers are divided into four different categories, with each type designed to tackle a particular kind of fire. This is vital for fire safety and effective response. In this article we explore Why do fire extinguishers have different colour bands.
1. Extinguishers class A (ordinary combustibles)
Use: The Class A Fire Extinguishers were designed to be used on fires with ordinary combustibles like paper, cloths, rubbers and plastics. These types of fires are commonly found in households, workplaces, and public space.
What They Do: Extinguishers of class A typically use monoammonium chloride or water as their extinguishing liquid. The water extinguishers do this by cooling and eliminating heat while the monoammonium chloride disrupts chemical reactions.
2. Extinguishers of Class B:
Extinguishers in class B can be used against fires created by liquids such a gasoline, oils, greases, or gases including natural gas and propane. The fires spread very quickly if the extinguishers are not used immediately.
The Class B Extinguishers are dry chemical extinguishers that contain sodium bicarbonate and potassium bicarbonate. These agents stop the combustion of the fire fuel by creating a chemical barrier.
3. Extinguishers of Class C (Electrical Defensibles)
Fires caused by electrical devices such as electric panels, motors and appliances are extinguished with Class C fire extinguishers. Fires involving energized electrical systems require extinguishers that are designed to protect against electrical shock.
The Class C Extinguishers contain similar dry chemical agents to Class B Extinguishers. These agents are able to stop the combustion process by interrupting the chemical processes.
4. Class D Fire Extinguishers (Metal Fires):
Usage: Fire extinguishers in class D can be used for fires with combustibles metals, like magnesium, titanium and sodium. This type of fire is relatively rare, yet can pose serious dangers if it’s not dealt with correctly.
It works by: Powdered metal agents (such as graphite powder or sodium-chloride) smother a fire, absorbing heat while preventing oxygen to reach the metal. Specialized extinguishers that should only be used to put out metal fires.
ABC Fire Extinguishers, Multipurpose. These ABC Fire Extinguishers come in handy for many situations. These extinguishers have the ability to put out fires from ordinary combustibles such as wood, paper and cardboard (Class A), liquids and gasses that are flammable (Class B) or electrical fires. It is suitable for all types of fires.
Location and Accessibility – It is essential that you place fire extinguishers accessible in your home or at work. Be sure that your family and friends know exactly where these extinguishers can be found, along with how to properly use them.
Fire extinguishers must be examined regularly to check that they’re in good working condition. You should check for damage, verify the integrity of the seal, and confirm that the pressure gauge is in working order.
To conclude, knowing the four different types of fire-extinguishers as well as their uses are essential to ensuring fire safety. Choose the correct fire extinguisher depending on what type of fire is likely to occur. Using the wrong type may be harmful or ineffective. Proper placement, regular maintenance and fire safety education are also essential parts of a comprehensive safety plan. They can save lives and protect property during a fire.