What are the advantages and disadvantages of dry powder fire extinguishers Discover now
Dry powder fire extinguisher is one of the effective fire prevention equipment today. Therefore, it is widely used in households, organizations and agencies.
Dry powder fire extinguisher is one of the effective fire prevention equipment today. Therefore, it is widely used in households, organizations and agencies. So what are the advantages and disadvantages of dry powder fire extinguishers? We invite you to explore in the article below.
What is the fire extinguishing powder in the tank? What is the effect?
What is the fire extinguishing powder in the tank? What is the effect?
Before coming to the pros and cons of dry powder fire extinguishers. Let's see what is in the fire extinguisher? And what is its effect?
What is the fire extinguishing powder in the tank?
Fire extinguishing powder is a chemical that is not toxic to humans, in its composition NaHCO3 accounts for about 80%. The principle of operation of fire extinguishing powder is to dilute the ratio of oxygen and the mixture of combustible substances. When this powder is sprayed at the base of the fire, NaHCO3 will be heated to produce carbon dioxide, which extinguishes the fire, the more CO2 generated, the faster the fire will be extinguished. Because it causes the fire area to be deprived of oxygen to sustain the fire.
The effect of fire extinguishing powder.
As mentioned above, fire extinguishing powder will dilute the oxygen present in the fire. That's because NaHCO3 when exposed to the temperature of the fire will produce CO2 (A substance that does not sustain combustion). So basically fire extinguishing powder will have the effect of extinguishing the fire. The more powder sprayed in, the faster the fire will be extinguished.
Fire extinguishing principle of powder fire extinguisher
Fire extinguishing principle of powder fire extinguisher
Powder fire extinguisher is a fire extinguisher made of good bearing steel, the parts of the extinguisher include valve assembly, pressure gauge, nozzle. Fire extinguishing agent is a specialized fire extinguishing powder that is pressurized by compressed air connected to the tank by a cylinder. Normal propellants are nitrogen, carbon dioxide, etc.
The principle of fire extinguishing of the powder fire extinguisher is as follows: When detecting a fire, quickly take the fire extinguisher powder and spray it at the base of the fire. When meeting high temperature, NaHCO3 powder will have a chemical reaction that produces CO2. As you know CO2 does not sustain combustion, so the fire is quickly extinguished.
What are the advantages and disadvantages of dry powder fire extinguishers? Discover now
What are the advantages and disadvantages of dry powder fire extinguishers? We will help you answer it right now.
What are the advantages and disadvantages of dry powder fire extinguishers?
Advantages
Let's see what outstanding advantages a dry powder fire extinguisher has:
- Quick extinguishing. Dry powder in a fire extinguisher when used correctly. Capable of ensuring very quick extinguishing of a newly initiated fire.
- Not conductive. This type of fire extinguisher can be used in incidents where electrical equipment is known or suspected to be working. Because it doesn't conduct electricity.
- Good for fuel fires. The dry powder, when used, coats fuels such as gasoline and does not expose them to oxygen, so the fire is quickly extinguished.
- Does not generate thermal shock. Since dry powder is used, hot metal does not cause thermal shock, making it useful for extinguishing fires involving wheel assemblies of all kinds.
- In addition, this type of bottle also has a number of other advantages such as: good heat shield, wide range of uses, large temperature distance...
Advantages of fire extinguisher powder
Defect
Here are some limitations of dry powder fire extinguishers. Please follow and catch up.
- Visibility effect. Using dry powder extinguishers and creating dense powder clouds will limit the visibility of firefighters.
- Difficulty breathing. If dry powder is inhaled when fighting a fire, it can irritate respiratory organs such as throat and lungs, causing difficulty breathing.
- Residual after use. Excess dry powder after fire extinguishing, may corrode some metal surfaces.
- In addition, using a dry fire extinguisher has a number of other limitations such as: Not completely preventing the fire, affecting when moving the fire department.
Conclusion: Above is information about the pros and cons of dry powder fire extinguishers. Hope the above article has brought you useful information. If you need advice or buy fire protection equipment, you can visit: contact directly at the address at the end of the article:
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