139:. Creosote, which is the by-product of the incomplete burning of wood (typically due to chronic combustion-air insufficiency), is extinguished by the chain reaction caused by the chimney bombs. Chimney bombs work by first being dropped directly down a chimney, where upon contact with the flue bottom and heat of the fire, they explode, thereby releasing the powder. Then, the natural chimney draft will carry the dry chemical powder up the shaft of the chimney, thus coating the creosote and eventually neutralizing the fire. Use of multiple chimney bombs may be necessary, depending on how severe the fire is. Chimney bombs can also be effective if they are opened and then dropped down the chimney. In order for chimney bombs to be effective, it may be necessary to first unclog the chimney.
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near or at their flash point. A Class K / Class F extinguisher is more effective in controlling fires involving primarily vegetable oils as it causes a chemical change to the oils or fats making re-flash far less likely. When a Class K / Class F extinguisher is not available an ABC dry chemical extinguisher can be carefully used to control a fire involving cooking oils or fats if the operator is aware of the potential need to re-apply more chemical if the oils or fats reignite. (
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characteristic and should therefore not be used on Class K / Class F fires. ABC dry chemical has been found to be effective in initially ceasing combustion of oils or fats, however re-application of additional dry chemical may be necessary due to the potential for re-flash of oils or fats heated to
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Dry chemical powder is used on all classes of fires. Dry chemical powder puts out the fire by coating the burning material with a thin layer of dust, thereby separating the fuel from the oxygen in the air. The powder also works to interrupt the chemical reaction of fire, so these extinguishers are
127:. Fires involving live electrical equipment (Class C in the American system; Class E in the Australian system) need to be put out with equipment that will not conduct its energy back to the user as is the case with water. Electricity can also cause fires of the other classes.
388:
The
Assessment of Fire Suppression Capability for the Ammonium Dihydrogen Phosphate Dry Powder of Commercial Fire Extinguishers. Chung-Hwei Su, Chan-Cheng Chen, Horng-Jang Liaw, Shiuan-ChengWang. Procedia Engineering Volume 84, 2014, Pages 485-490
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extremely effective at putting out the fire. Pressure is generated by gas cartridges stored inside the cylinder. Its force will last for 45 seconds and can reach 3–4.5 metres (10–15 ft).
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fires by melting at approximately 180–200 °C (350–400 °F). Class A fires are caused by the burning of common combustible materials, such as wood, paper, or most plastics.
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Chimney bombs are zip-lock bags or other small bags filled with ABC dry chemical powder. Chimney bombs are used by fire service personnel to help extinguish
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fires. The resulting chemical reaction can cause an explosion or a breakdown of the chemicals releasing toxic gases. Water should be used in that case.
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in the
American system; Classes B and C in the European and Australian systems) include the burning of gasoline, oil, propane, and natural gas.
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Due to the corrosive properties of ABC dry chemical, it is not recommended for use around aircraft or sensitive equipment.
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being a globally valuable material. See the references for links to recycling research projects and companies.
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Extinguisher powder reused in fertilisers and fire retardants (Phys.org NOVEMBER 27, 2018)
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509:"Selection of Fire Extinguishers for Fires Involving Oxidizers (Swimming Pool Chemicals)"
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400:"Ecological Effects of Fire Retardant Chemicals and Fire Suppressant Foams"
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powder. ABC dry chemical is usually a mix of monoammonium phosphate and
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ABC dry chemical is inappropriate for certain metal fires (
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by coating the surface to which it is applied. These fires (
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450:"Classes of Fire – A, B, C, D, and K – Falck Productions"
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is a dry chemical extinguishing agent used on class A,
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The powder contains monoammonium phosphate, with the
559:"Sprinkler protection for swimming pool chemicals"
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57:. It uses a specially fluidized and siliconized
69:uses a similar mixture, called Phos Chek G75F.
23:An ABC dry chemical fire extinguisher made by
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103:The powder breaks the chain reaction of
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16:Dry extinguishing agent for firefighting
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147:ABC dry chemical is inappropriate for
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425:"Classes Of Fires And Extinguishers"
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119:It is safe and effective for
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254:Flammable liquids and gases
224:Ordinary solid combustibles
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47:multi-purpose dry chemical
618:MSDS for ABC Dry Chemical
585:"NFPA - ABC Dry Chemical"
162:) and does not possess a
99:Burning liquids and gases
87:Common combustible solids
638:Fire suppression agents
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583:Cholin, Roger (1975).
59:monoammonium phosphate
31:Monoammonium phosphate
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589:Triangle Fire Safety
105:liquid and gas fires
464:"Fire Engineering"
312:Combustible metals
143:Inappropriate uses
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591:. Archived from
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536:. Archived from
534:"Chlorine facts"
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315:D for "Dynamite"
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183:Geometric symbol
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121:electrical fires
115:Electrical fires
63:ammonium sulfate
35:ABC Dry Chemical
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348:Not compatible
345:K for "Kitchen"
318:Not compatible
287:C for "Current"
180:Fire class (US)
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137:chimney fires
131:Chimney bombs
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91:It insulates
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55:class C fires
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597:. Retrieved
593:the original
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567:. Retrieved
563:NFPA Journal
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538:the original
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517:. Retrieved
513:the original
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492:. Retrieved
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468:the original
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429:Safety Notes
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408:. Retrieved
404:the original
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193:Intended use
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290:Compatible
260:Compatible
230:Compatible
227:A for "Ash"
125:electricity
569:2008-09-13
544:2008-09-13
519:2008-09-13
494:2015-10-19
474:2013-02-27
435:2019-08-08
410:2011-02-16
367:References
78:Common use
39:ABC Powder
361:phosphate
355:Recycling
189:Pictogram
43:tri-class
632:Category
197:Mnemonic
153:oxidizer
149:chlorine
599:June 5,
169:Class-K
160:Class-D
109:Class B
93:Class A
51:class B
565:. 2004
431:. 2019
308:(none)
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53:, and
45:, or
25:Amerex
601:2019
73:Uses
67:USGS
171:).
151:or
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375:^
41:,
37:,
33:,
603:.
572:.
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497:.
477:.
452:.
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323:K
295:D
265:C
235:B
205:A
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
