Types of Fire Extinguishers

Of the various types of fire extinguishers only those of the water-solution type would be effective against the electron bomb, and usually more than one extinguisher would be required. The soln should be played upon the bomb in the same way as water from a nozzle. A foam extinguisher might... 

All fires are not alike. Each requires a different type of fire extinguisher. 

What type of fire extinguishers would be appropriate if a small spill is ignited Note that if equilibrium is not attained, the vapor concentrations will be lower than calculated and a flammable air-vapor mixture could be present. 

A very dangerous fire hazard when exposed to heat or flame. The powder may ignite spontaneously in air. The solid metal ignites above 180°C. It will burn in oxygen, nitrogen, or carbon dioxide, and will continue to burn in sand or sodium carbonate. The use of most types of fire extinguishers (e.g., water, foam, carbon dioxide, halocarbons, sodium carbonate, sodium chloride, and other dry powders) may cause an explosion. Molten lithium is... 

The type of extinguisher is keyed to the type of fire. Extinguishers for Class A fires often use water. The water cools the fuel so that it does not react as readily. The steam that is produced helps displace the oxygen-containing air around the fire. Carbon dioxide extinguishers can also be used. Because carbon dioxide is denser than air, it forms a layer underneath the air and cuts off the O2 supply. Water cannot be used on Class B fires. 

Identify the type of fire extinguisher available in your laboratory. On what classes of fires should it be used Record the steps needed to use the fire extinguisher. 

Like sodium chloride, carbon dioxide is relatively stable. Carbon dioxide is used in some types of fire extinguishers because it does not support burning. Figure 4.4. Photosynthesis is probably the most significant chemical reaction of carbon dioxide. In photosynthesis, plants use energy from the sun to combine carbon dioxide and water chemically to make simple sugars. Plants use these sugars as raw materials to make many... 

This section suggests some equipment that should be maintained at the warehouse for relatively small chemical spills, including personal protective equipment. Additionally, Chapter 7 provides information on the types of fire extinguishers that would be useful against incipient fires. 

These are only the common types of fire extinguishers. There are many others to choose from. Base your selection on the classification and the extinguisher s compatibility with the items you wish to protect. 

Potassium bicarbonate is also used in certain types of fire extinguishers. When such an extinguisher is used, the potassium bicarbonate reacts with an acid present in the device to produce carbon dioxide. The carbon dioxide propels a liquid from the extinguisher and, itself, helps put out a fire. Potassium bicarbonate is also used in agriculture to maintain proper acidity in soils and to supply potassium that may be missing from the ground. 

Markings - there are many instances where marking of equipment is appropriate for health and safety reasons, e.g. start/stop controls, safe working load on cranes or types of fire extinguishers. 

There should be some basic emergency equipment and supplies readily available to every laboratory usirrg hazardous chemicals. It is essential that some items be available within the laboratory itself For example, in any laboratory in which flammables are stored, OSHA standards (19 10.106(dX7)(b)) require that at least one 12-B portable fire extinguisher be located not less than 10 feet nor more than 25 feet from a flammable material storage area within a building. If other types of chemicals are in use, other types of fire extinguishers should be available, such as class D units if reactive metals are stored or in use or pressurized water units if there are substantial amounts of ordinary combustible materials present. 

Flammability and explosibility This section should indicate the NFPA rating for the substance, explosion limits, toxic substances that may be produced in a fire, and the type of fire extinguisher appropriate for fighting fires. 

The hot work permits must have the date for the work, identify the equipment on which the hot work is to be performed, identify locations where sparks may drop, describe the location and type of fire extinguishers, assign fire watchers, state fire precautions, identify prohibited areas, require relocation of combustibles, and identify the need to shut down any systems that may be a potential fire hazard. 

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... 

In Chapter 1 we looked at some of the laws and regulations that affect our working environment. We looked at safety signs and personal protective equipment (PPE), and how to recognize and use different types of fire extinguishers. 

Ammonium phosphates will act as fire retardants when wood or fabrics are impregnated with them. On heating they evolve ammonia and phosphoric acid. The former retards combustion of the materials and the latter catalyses the charring of cellulose to carbon. The mono ammonium salt can be used in granular form in some types of fire extinguishers. 

Correct procedures for using recommended type of fire extinguisher such as carbon dioxide. 

List three types of fire extinguishing medium and the types of fire for which each is best suited. 

The number and type of fire extinguishers required is dependent on the level of fire risk and the size of the premises. Fire fighting capacity is indicated by either an A rating for carbonaceous material fires or a B rating for liquid fuel fires. The actual rating is determined by tests specified in BS 5423 1987. 

The five types of fire extinguishers most commonly found in the chemical processing industry, and their range of effectiveness, are as follows ... 

Figure 15.13 Types of fire extinguishers and labels. (NB Main colour of all extinguishers is red with 5% for label.)...

Are the right number and type of fire extinguishers available and accessible ... 

Five different categories of fire are listed in a standard where each category is related to the type of substance that forms the fuel. These categories are listed in Table 4.2.1 which also indudes reference to the means for extinguishing the fire. The identification of the type of fire is important to ensure selection of the correct type of fire extinguisher. 

While not adopted by OSHA, NFPA 10, Standard for Portable Fire Extinguishers, states that the following types of fire extinguishers are considered obsolete and are to be removed from service ... 

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