Today’s portable fire extinguishers are pressurized canisters that release a variety of fire suppressants including powders, gases, and water. Most fire …
Powder. Dry powder fire extinguishers cause health effects when the user inhales the powder 1. Nasal irritation and throat irritation such as a cough or discomfort in the chest are the result of breathing the powder or the dust. Those with medical conditions such as asthma may experience respiratory difficulty after exposure to dry compounds in …
Fire Extinguisher Types | NFPA
In the hands of a trained person, portable fire extinguishers are great tools to protect people and property from fire during early stages. When using an extinguisher or selecting an extinguisher to install, it’s important to know the characteristics of different fire extinguishers. This blog will address the different types of fire extinguishers by breaking them …
Flame inhibitors are substances that chemically react with the burning material, thus extinguishing the flames. Dry-chemical fire extinguishers work in this way, and can contain monoammonium phosphate, sodium and potassium bicarbonate and potassium chloride. Vaporizing liquids, such as Halon, also have a flame inhibiting action.
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Can a Class A fire extinguisher be used on electronic devices?
Larger models of these fire extinguishers are listed for Class A as well as Class B and Class C fires, which makes them quite suitable for use on fires in electronic equipment. When discharged, these agents are in the combined form of a gas/mist or a liquid, which rapidly evaporates after discharge with about twice the range of carbon dioxide.
Are fire extinguishers harmful?
Use in areas with poor air flow, use with intent to harm someone, or intentional inhalation of fire extinguishers can produce serious toxicity and would require medical evaluation. Debate continues about when humans first started using fire, but controlling and extinguishing fires were natural developments shortly afterward.
What are the different types of chemical fire extinguishers?
Types of agents available include sodium bicarbonate base and potassium bicarbonate base. Dry chemical type extinguishers have special treatments that ensure proper flow capabilities by providing resistance to packing and moisture absorption (caking). Fire extinguishers of this type contain an ammonium phosphate base agent.
What type of fire extinguishers release a fine powder?
Many fire extinguishers release a fine powder. The most common is the multipurpose dry chemical type, which is used for Class A, B, and C fires. These contain monoammonium phosphate, which comes out as a yellow powder. The yellow color helps to distinguish it from other non-multipurpose extinguishers.
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Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher