Grease fires

Petroleum (qv) products dominate lubricant production with a 98% share of the market for lubricating oils and greases. While lower cost leads to first consideration of these petroleum lubricants, production of various synthetic lubricants covered later has been expanding to take advantage of special properties such as stability at extreme temperatures, chemical inertness, fire resistance, low toxicity, and environmental compatibility. 

Class B fire Flammable liquids, petrol, oils, greases, fats Blanketing/ smothering most effective Dangerous Most suitable Most suitable Most suitable " Small fires only Most suitable Small fires only Small fires only... 

Chemical Reactivity - Reactivity with Water. No reaction Reactivity with Common Materials Contact with grease, wood and other combustibles may result in fire Stability During Transport Stable ... 

Reactivity with Common Materials Contact with wood, paper, oils, grease, or finely divided metals may cause fires and explosions Stability During Transport Stable Neutralizing Agents for Acids and Caustics Not pertinent Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

Grease A filter used in kitchen air extraction systems to prevent the contamination of the ductwork system with grease, which would be a fire hazard. 

Cooker hood A device to collect cooking fumes from above a kitchen range and discharge them to the outside. It may incorporate a grease filter, fan, and fire damper or non-return flow damper. 

Patch. A piece of greased cloth or leather which was wrapped around the ball to make it fit the bore more tightly. It was commonly used with muzzle-loading rifles that fired spherical balls, and in some dueling pistols... 

The three classes of fire are A those started from wood paper or rags B those started from oil, grease, or flammable liquids C those initiated by electricity. 

As the gas pressure inside the extinguisher increases, it pushes a jet of water out of the extinguisher s nozzle. Because soda acid extinguishers expel water, they should only be used on class "A" fires. Class "A" fires are those that involve wood, paper, cardboard, and cloth. Soda-acid fire extinguishers should never be used on electrical or grease fires because the water they use can cause these kinds of fires to spread and burn out of control. 

Contact with the following materials, containing combined hydrogen, is likely to cause fire or explosion acetic acid, ammonia, benzene, ethanol, hydrogen, hydrogen sulfide, methane cork, grease, paper, wax, etc. The carbon content further contributes to the observed reactivity [1]. Chloromethane reacts with explosive violence [2]. See Acetonitrile, above... 

It responds to electric arcs from welding operations. It can be affected by deposits of grease and oil on the lens. This reduces it s ability to "see" a fire. Lightning with long duration strikes can cause false alarm problems. Some vapors typically those with unsaturated bonds may cause signal attenuation. Smoke will cause a reduction in signal level seen during a fire. It may produce a false alarm response when subject to other forms of radiation such as from NDT operations. 

Wet or dry chemical fixed suppression systems are typically provided over the kitchen cooking appliances and in exhaust plenums and ducts. Activation means is afforded by fusible links located in the exhaust ducts/plenums usually rated at 232°C (450°F). Manual activation means should not be provided near the cooking area, but in the exit routes from the facility. The facility fire alarm should sound upon activation of the fixed suppression system and power or gas to the cooking appliances should be automatically shut off. The ventilation system should also be shut down by the activation of the fire alarm system. Protective caps should be provided on the suppression nozzles to prevent plugging from grease or cooking particulates. 

Carbon Tetrachloride Solvents, refrigerant, aerosols, fire extinguishers, grease solvents. 96 2B... 

Solvent cleaning, the oldest method, preferably in the vapour phase. There are severe restrictions on the use of solvents, chlorinated ones in particular, and safety, environmental and fire risks. Convenient solvents, which must be compatible with the substrate, can dissolve oils, greases and other organic contaminants. Generally, the parts... 

Uses Solvent for waxes, greases, and oils separating solids with lower densities component of fire-resistant chemicals geological assaying medicine (sedative) gauge fluid intermediate in organic synthesis. 

Multipurpose dry chemical extinguishers (20-A 80B-C) should be provided in warehouses and shop buildings where wood, paper, plastics, and other flammable solids, as well as flammable liquids, may be stored. In grease manufacturing and compounding or similar operations where little or no wood, paper, and similar combustibles are stored, but where flammable liquids may be prevalent, potassium bicarbonate dry chemical extinguishers should be used. Extinguishers should be located not more than 75 ft (23 m) away from any potential Class A fire hazard and not more than 50 ft (15 m) from Class B fire hazards. 

Class B Flammable liquids Fires in flammable liquids, combustible liquids, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, alcohols, and flammable gases. 

Fluorine nitrate is shock sensitive, especially in liquid state. The liquefied material explodes when shaken vigorously or in contact with alcohol, ether, andine, or grease (Bretherick s Handbook of Reactive Chemical Hazards, 5th. Ed., P. Urhen (ed.) 1995, pp 1405-6, Oxford, UK Butterworth-Heinemann). The gas catches fire when mixed with ammonia or hydrogen sulfide. 

FIREFIGHTER 53. If a pan of grease caught fire on top of a stove, PRACTICE EXAM 3 56. Off-duty Firefighter Roth is walking her dog... 

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