Multipurpose fire extinguishers

Fire-resistant hydraulic fluids shall be used in hydraulically-actuated underground machinery and equipment unless such equipment is protected by a fire suppression system or by multipurpose fire extinguisher(s) rated at of sufficient capacity for the type and size of hydraulic equipment involved, but rated at least 4A 40B C. 

Keep COj or ABC multipurpose fire extinguishers available for use in an emergency. Keep a fire watch in place for at least 30 minutes after torch work is completed. 

An appropriate number, type, and size of hand-held fire extinguishers should be provided throughout the building to handle ordinary combustibles and electrical fires in the control room and related areas. Typically, clean agent or carbon dioxide fire extinguishers should be provided for electrical and electronic equipment. Dry chemical extinguishers should be avoided because of equipment contamination with powder. For use on ordinary combustible fires in the associated areas water or multipurpose dry chemical fire extinguishers should be provided. 

Forex. [Atochem N. Am.] High performance multipurpose liquefied gas for fire extinguishing applies. 

All chemical laboratories should have carbon dioxide and dry chemical fire extinguishers. Other types of extinguishers should be available if required for the work being done. The four types of extinguishers most commonly used are classified by the type of fire for which they are suitable, as listed below. It should be noted that multipurpose class A, B, and C extinguishers are available. 

All labs should be equipped with fire extinguishers. These should be clearly identified and wall-mounted near exits. Multipurpose extinguishers (ABC type) are generally utilized because these are effective against the most common types of fires. Minimally, extinguishers should be inspected annually. In addition to fire extinguishers, sand and other adsorbents are also a fast and easy way of stopping small fires and should be easily accessible. 

The kind and number of extinguishers needed for particular types of fires are specified in NFPA 10, Portable Fire Extinguishers. The most common types of extinguishers in use are the pressurized water, carbon dioxide, and multipurpose dry chemical. Other extinguishers commonly used are water pump tanks, halon 1211, and combustible-metal-type dry powder. 

Water can be used. Multipurpose dry chemical may be considered for some warehouse facilities and offices where lightweight fire extinguishers are desirable for easier handling. Extinguishers for Class A fires should be placed so that no point in the protected area is more than 25 meters from an extinguisher. 

Slow-vehicle warning triangle Fire extinguisher (5 lb multipurpose—ABC dass)... 

Dry chemical agents currently used are a mixture of powders, primarily sodium bicarbonate (ordinary), potassium bicarbonate (Purple K), monoammmonium phosphate (multipurpose). When applied to a fire they cause extinguishment by smothering the fire process. They will not provide securement of a flammable liquid spill or pool fire and it can re-flash after it is initially suppressed if an ignition source is present (i.e., a hot surface). Dry chemical is still very effective for extinguishment of three dimensional flammable liquid or gas fires. It is nonconductive and therefore can be used on live electrical equipment. 

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. 

Steam-generating plants, air compressor plants, and similar plants should be provided with potassium bicarbonate dry chemical extinguishers (120-B C) for Class B or Class C fires in the areas containing hydrocarbons or other flammable liquids. For fires in electrical equipment, at least one extinguisher (10-B C) should be provided. If Class Afire hazards exist, multipurpose dry chemical extinguishers (20-A 80-B C) or water extinguishers should be provided. 

Monoammonium phosphate is an agent used in multipurpose extinguishers ( ABC type extinguishers). This is a especially desirable for the untrained person. These extinguishers are not to be used on fire involving combustible metals. 

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