Types of Fires
There are four classes of fires, categorized according to the kind of material that is burning. For the first three classes of fires, there are two sets of color-coded icons in common use. One or both kinds of icons appear on most fire extinguishers to indicate the kinds of fire against which the unit is intended to be used. There is only one icon used to indicate the fourth (class D) kind of fire. Class D fires involve uncommon materials and occur in fairly specialized situations. Note that any given fire can fall into more than one class; a fire that involves both burning paper and kitchen grease would be a Class AB fire.
Class A fires are those fueled by materials that, when they burn, leave a residue in the form of ash, such as paper, wood, cloth, rubber, and certain plastics.
Class B fires involve flammable liquids and gasses, such as gasoline, paint thinner, kitchen grease, propane, and acetylene.
Fires that involve energized electrical wiring or equipment (motors, computers, panel boxes) are Class C fires. Note that if the electricity to the equipment is cut, a Class C fire becomes one of the other three types of fires.
Class D fires involve exotic metals, such as magnesium, sodium, titanium, and certain organometallic compounds such as alkyllithium and Grignard reagents
2006-11-13 09:18:34
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answer #1
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answered by littlemomma 4
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This Site Might Help You.
RE:
How many classes of fires are there?
For example: "Class D fire"
2015-08-16 10:22:10
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answer #2
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answered by Dorthey 1
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For the best answers, search on this site https://shorturl.im/EIobP
Rather than write a lengthy answer on this one, I want to refer you to an excellent site that I think does a fantastic job of not only identifying the classes of fire (you missed one, BTW, class K), but shows what extinguishers should be used on each. Check it out, I think you will find everything you are looking for...
2016-04-01 07:41:20
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answer #3
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answered by ? 4
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From the reference OSHA site:
"Class A extinguishers are used on fires involving ordinary combustibles, such as wood, cloth, and paper.
Class B extinguishers are used on fires involving liquids, greases, and gases.
Class C extinguishers are used on fires involving energized electrical equipment.
Class D extinguishers are used on fires involving metals such as magnesium, titanium, zirconium, sodium, and potassium."
2006-11-13 09:31:08
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answer #4
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answered by Helmut 7
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class a-z fires
2006-11-13 13:13:50
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answer #5
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answered by Anonymous
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