Portable fire extinguishers
-
Upload
andy-mihans -
Category
Science
-
view
366 -
download
0
Transcript of Portable fire extinguishers
![Page 1: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/1.jpg)
![Page 2: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/2.jpg)
Portable Fire Extinguishers
Fire extinguisher classifications.
![Page 3: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/3.jpg)
Portable fire extinguishers are chosen based on the type of fuel burning.
![Page 4: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/4.jpg)
Fuel Textiles Paper Plastics Rubber Wood
Extinguished with:WaterWater-based agents (Class A foam)Dry Chemicals
Class A fires involve ordinary combustibles.
![Page 5: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/5.jpg)
Fuel Alcohol Gasoline Lubricating Oils Liquefied petroleum gas (LPG)
Extinguished with:Carbon DioxideDry ChemicalsClass B Foam
Class B fires involve flammable, combustible liquids and gases.
![Page 6: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/6.jpg)
Class C fire involves energized electrical equipment.
Treat as Class A or B once power
is off
![Page 7: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/7.jpg)
Class D fires involve combustible metals and alloys.
![Page 8: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/8.jpg)
CAUTION!
The use of water or water-based agents on Class D fires will cause the fire to react violently, emit bits of molten metal, and possibly injure firefighters close by.
![Page 9: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/9.jpg)
Use dry powder, not dry chemical, extinguishers on Class D fires.
![Page 10: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/10.jpg)
CAUTION!Do not use a dry chemical extinguisher on Class D fire. The dry chemical often reacts violently with burning metals.
![Page 11: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/11.jpg)
Class K fires involve combustible cooking oils.
Vegetable or animal fatsBurn at extreme
temperaturesFound at commercial,
institutional, industrial, home
Controlled by wet chemical systems,
portable extinguishers
![Page 12: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/12.jpg)
Portable Fire Extinguishers
Types of fire extinguishers.
![Page 13: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/13.jpg)
Fire extinguishers are organized by type of extinguishing agent and the method used to expel their contents.
(Cont.)
![Page 14: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/14.jpg)
Fire extinguishes are organized by type of extinguishing agent and the method used to expel their contents.
![Page 15: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/15.jpg)
Use stored-pressure water extinguishers on small Class A fires.
![Page 16: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/16.jpg)
Use wet chemical stored-pressure extinguishers on Class K fires.
Potassium based, low pH
Saponification
Courtesy of R
on Moore/M
cKinney (TX
) FD
![Page 17: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/17.jpg)
Clean agent extinguishers replaced halogenated agents.
Courtesy of A
nsul Corp.
![Page 18: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/18.jpg)
Carbon dioxide (CO2) extinguishers discharge as a gas and are most effective on Class B and C fires.
![Page 19: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/19.jpg)
CO2 is stored under its own pressure and is discharged through a plastic or rubber horn.
O2
CO2
Dry ice crystals
• Smothers fire• Little cooling effect• Reignition possible
![Page 20: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/20.jpg)
CAUTION!
When carbon dioxide is discharged, a static electrical charge builds up on the discharge horn. Touching the horn before the charge has dissipated can result in a shock.
![Page 21: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/21.jpg)
Dry chemical extinguishers use additives to keep extinguishing agents ready for use, even after long storage periods.
![Page 22: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/22.jpg)
Dry chemical extinguishers may react chemically with other types of extinguishing agents.
![Page 23: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/23.jpg)
WARNING!
Never mix or contaminate dry chemicals with any other type of agent.
![Page 24: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/24.jpg)
Dry chemical agents are considered non-toxic and safe for use.
![Page 25: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/25.jpg)
Follow these steps when using dry chemical extinguishers on Class A fires.
![Page 26: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/26.jpg)
Portable Fire Extinguishers
Fire extinguisher rating system.
![Page 27: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/27.jpg)
Fire extinguishers are rated according to performance capability.
(Cont.)
![Page 28: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/28.jpg)
Fire extinguishers are rated according to performance capability.
![Page 29: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/29.jpg)
Fire extinguishers rated for multiple classes of fire are identified by a combination of letters.
![Page 30: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/30.jpg)
Fire extinguishers are identified by colored geometric shapes or pictographs.
![Page 31: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/31.jpg)
Fire extinguishers are chosen to achieve two main goals.
![Page 32: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/32.jpg)
Consider several factors when selecting the proper fire extinguisher.
![Page 33: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/33.jpg)
After you select the extinguisher make a quick visual inspection.
![Page 34: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/34.jpg)
Follow these general steps for using fire extinguishers.
(Cont.)
![Page 35: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/35.jpg)
Follow these general steps for using fire extinguishers.
• If not extinguished after full discharge, withdraw and reassess
• If solid fuel, use appropriate tool to overhaul
• If liquid fuel, appropriate foam may be necessary
![Page 36: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/36.jpg)
Remember the following considerations when using extinguishers.
![Page 37: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/37.jpg)
Portable Fire Extinguishers
Inspection, care, and maintenance
![Page 38: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/38.jpg)
Follow these general procedures for every extinguisher inspection.
(Cont.)
![Page 39: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/39.jpg)
Follow these general procedures for every extinguisher inspection.
![Page 40: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/40.jpg)
Follow these steps if any extinguishers are found to be deficient.
![Page 41: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/41.jpg)
Follow these general guidelines when caring for extinguishers.
(Cont.)
![Page 42: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/42.jpg)
Follow these general guidelines when caring for extinguishers.
![Page 43: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/43.jpg)
Clean extinguishers periodically and after every use.
![Page 44: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/44.jpg)
Extinguishers require for annual inspection and maintenance.
![Page 45: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/45.jpg)
• Portable fire extinguishers can control or extinguish small incipient or early growth stage fires quickly in the hands of trained personnel; you must be familiar with their characteristics and be able to select and use them properly.
Summary
(Cont.)
![Page 46: Portable fire extinguishers](https://reader035.fdocuments.in/reader035/viewer/2022081604/58ae050c1a28aba3178b48eb/html5/thumbnails/46.jpg)
• Inspecting, caring for, maintaining extinguishers assigned to your apparatus and facility are also important skills for you to have.
Summary