1 / 17

Fire Extinguishers

Fire Extinguishers. NFPA 1910 Requirements. Dry Chemical 80B:C CO2 10B:C 1 2 ½ water extinguisher. NFPA 10. Standards for portable fire extinguishers. Class A. Normal Combustables 1-A through 40-A 1-A= 1 ¼ gal. of water 2-A = 2 ½ gal.of water Tested with wood crib and pannel

gavril
Download Presentation

Fire Extinguishers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fire Extinguishers

  2. NFPA 1910 Requirements • Dry Chemical 80B:C • CO2 10B:C • 1 2 ½ water extinguisher

  3. NFPA 10 • Standards for portable fire extinguishers

  4. Class A • Normal Combustables • 1-A through 40-A • 1-A= 1 ¼ gal. of water • 2-A = 2 ½ gal.of water • Tested with wood crib and pannel • Tested by expert or non-expert

  5. Class B • Flammable Liquids • 1-B through 640-B • Approximate square footage of fire a non-expert can extinguish • Test on pan with n-heptane • Rating is 40% of what an expert can extinguish

  6. Class C • Essentially an electrified class A or B • No fire test conducted, only non-conductivity tests

  7. Class D • No numerical rating scale • Extinguishing agents may handle only a single type of class d fire

  8. Alternative markings for extinguishers This is a Class A

  9. Label information is entered like this. Label Says: A-4 20B:C Where might you use it? What does the label mean?

  10. Pump-Tank Water Extinguishers • Often called a backpack or indian pump • Class A fires only • Used for grass fires and minor overhaul operations only • 1-5 gal • Need freeze protection

  11. Stored Pressure Water • Pressurized with O2 or Nitrogen • Class A fires only • Grass fires, overhaul • 1.5 - 2.5 gal • Foam can be added to water • Needs freeze protection

  12. Aqueous Film Forming Foam (AFFF) • Good for A and B fires • Most are 2.5 gal. • Air aspirating nozzle (for better foam) • Apply as a blanket which will seal out O2 • AFFF helps water penetrate better • Won’t work on water soluble liquids • Works well on pools of class B

  13. Dry Chemical • (Multipurpose) ABC or (Ordinary) BC only • 2.5 to 30 lbs • Don’t confuse with dry powder • No need for freeze protection • Many agents are used

  14. CO2 Extinguisher • Class B and C • 2-20 lbs • CO2 discharged through horn (don’t touch it) • Creates “snow” that sublimes and smothers fire • No “film” so reignition is a danger

  15. Halon • Halon 1211 • Not really sure how it works • Halon 1301

  16. PASS System All extinguishers are used essentially this way http://www.dm.af.mil/fire/extinfo.htm#Classes of Fire

  17. Special Considerations • AFFF • careful not to disturb the foam blanket • Dry Chemical • spray at base of the fire • CO2 • Sweep across entire fuel surface

More Related