Fire extinguishers types

Locating and using portable fire extinguishers types of extinguishers (water, carbon dioxide, foam, Halon, dry chemical, and power) and techniques for portable extinguishers. 

Other useful safety-related information is normally provided as well, such as the flash-point (if applicable), fire extinguisher type (if applicable), first aid and medical advice, a color code to aid in avoiding incompatible storage, and standard identifiers, such as a CAS number which can aid in referring to a MSDS data base, and a UN number which is needed in disposing of the chemical as a hazardous waste. 

Type of fire extinguisher Type of fire Water t Signai red fiash on red Foam Paie cream fiash on red Carbon dioxide gas Biack fiash on red Dry powder t French blue flash on red Vaporizing foam f Emerald green flash on red... 

Class of fire Extinguisher type Water Alcohol-resistant AFFF foam Wet chemical Vaporizing liquid NAFP 3 - commercial use only Ciubon oxide Dry chemical powder AB(E) and B(E) types... 

Major hazards Fire extinguisher type available Location(s) ... 

Production and Shipment. Estimated adiponitrile production capacities in the U.S. in 1992 were about 625 thousand metric tons and worldwide capacity was in excess of lO metric tons. The DOT/IMO classification for adiponitrile is class 6.1 hazard, UN No. 2205. It requires a POISON label on all containers and is in packing group III. Approved materials of constmction for shipping, storage, and associated transportation equipment are carbon steel and type 316 stainless steel. Either centrifugal or positive displacement pumps may be used. Carbon dioxide or chemical-foam fire extinguishers should be used. There are no specifications for commercial adiponitrile. The typical composition is 99.5 wt % adiponitrile. Impurities that may be present depend on the method of manufacture, and thus, vary depending on the source. 

Shipment. The DOT/IMO shipping information is shown in Table 6. Approved materials of constmction for shipping, storage, and associated transportation equipment are lined carbon steel (DOT spec. 105 S 500W) and type 316 stainless steel. Water spray, carbon dioxide, chemical-foam, or dry-chemical fire extinguishers may be used. 

Fire-detection devices such as flame-sensing or ioni2ation-interference types operate much more rapidly than sprinkler heads and are used extensively both as alarms and to activate fixed fire-extinguishing systems. 

Threshold limit values for the components of cemented carbides and tool steels are given in Table 14 (176). There is generally no fire or explosion hazard involved with tool steels, cemented carbides, or other tool materials. Fires can be handled as metal fires, eg, with Type D fire extinguishers. Most constituents of tool materials do not polymerize. 

An important use of bromine compounds is in the production of flame retardants (qv). These are of the additive-type, which is physically blended into polymers, and the reactive-type, which chemically reacts during the formation of the polymer. Bromine compounds are also used in fire extinguishers. Brominated polymers are used in flame retardant appHcations and bromine-containing epoxy sealants are used in semiconductor devices (see... 

Extinguisher type Water Carbon dioxide Dry powder Foam Vaporizing liquicf Fire blanket Sand... 

Fire Hazards - Flash Point (deg. F) 265 OC Flammable Limits in Air (%) 2.3 (calc.) - 12.1 (est.) Fire Extinguishing Agents Carbon dioxide or dry chemical for small fires alcohol-type foam for large... 

If sprinklers are required, or if the sprinkler system is to be modified, such work should only be performed by a company certified to do it. Fire extinguishers are almost always required. The number of them, their placement, and the types needed are matters to be discussed with fiire officials. Extinguishers should be regularly serviced by qualified specialists. 

Safety signs of approved types, available from laboratory supply houses and safety equipment dealers, should be posted in appropriate spots. The door leading out of the laboratory should be marked EXIT, while the door to a back room should be marked NO EXIT. The location of a fire extinguisher must be clearly marked. Signs are available for every type of hazard. Homemade signs not conforming to official standards should not be considered. 

For gases and vapors, the amount absorbed is highly dependent on the partial pressure of the gas and the solubility of the gas in blood. Let s take the simple case of a gas that is not metabolized and is excreted by exhalation (e.g., an anesthetic gas or a Halon-type fire-extinguishing agent). At any given concentration (or partial pressure) in the atmosphere, the concentration in the blood will reach a steady state in the blood. Accordingly, prolonged exposure does not lead to continual buildup. 

Carbon dioxide (CO ) is the 18th most frequently produced chemical in the United States. It has numerous uses, including in refrigeration, in the manufacture of carbonated drinks (e.g., soda pop), in fire extinguishers, in providing an inert atmosphere (unreactive environment), and as a moderator for some types of nuclear reactors. 

It is important to select detection devices that are appropriate for the type of fire most likely to occur. Failure to do so will result in either a very slow response or the possibility of a large number of spurious alarms. The latter should be particularly avoided where the detection system is used to activate a fixed fire extinguishing system. 

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. 

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