| Extinguishers |
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| Thursday, 14 January 2010 01:30 | |
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Statewide Fire Protection : Water Fire Extingushers:
Paper - Textiles - Wood - Plastics - Rubber Resources: Foam Extinguishers:
These extinguishers contain a concentrate mixed with water, which produces foam when discharged. The normal capacity of this type of fire extinguisher is 9 litres, however Wormald has developed a 4.5 litre Spray Foam for use where special circumstances exist.Foam extinguishers are effective against Class A & B fires involving: Paper - Textiles - Wood - Plastics and Rubber - Petrol Foam provides a blanket covering when utilised on flammable liquid or carbonaceous fires assisting with the exclusion of oxygen and thus reducing the ability of fuel to continue burning.The normal capacity of this type of extinguisher is 9ltr, however Wormald have developed a 4.5ltr Spray Foam for use where special circumstances exist.
Dry Chem Extinguishers:
Dry Chemical Powder fire extinguishers (DCP's) are the most widely used fire extinguishers, suitable for use on many types of fires. The compact nature of these fire extinguishers, ranging from the 1.0kg domestic model up to the 9kg industrial model, enables them to be utilised in numerous applications. Dry Chemical Powder extinguishers are effective against fires involving: Paper, Textiles, Wood, Plastics and Rubber Special powder is available for Class D (metal) fires, however have a limited impact upon the other Classes of fires. The dry powder discharged against a fire has the ability to absorb fuel molecules into the surface thus diminishing the ability of the fire to continue. However, consideration must be given to the location and usage of this product due to the discharging of this fine powder. Specific concerns include the restriction of vision for a short period, the infiltration of powder into sensitive equipment and the creation of residue which, when dry, may be able to be vacuumed. Consideration must be given to the location and usage of this product. The discharging of a fine powder in certain areas may cause specific concerns requiring consideration. These include the restriction of vision for a short period, the infiltration of powder into sensitive equipment or the creation of residue which, when dry, may be able to be vacuumed. Resources:
Wet Chemical Extinguishers:
The normal capacities of this type of fire extinguisher is 7 litres, however Wormald has developed a 3.5 litre Wet Chemical extinguisher with a 1A:4F rating, ideal where space is a restricting feature such as restaurant kitchens. These extinguishers utilise an aqueous solution discharged in a fine spray to the surface of Class F fires. The agent reacts with the burning oil, or fat, forming a ‘blanket’ which extinguishes the flame by creating a saponifying action and changing the burning liquid into a soap like substance. Once used, as the solution is usually alkaline, it is recommended the surface be cleaned and all residue removed within a reasonable time period. Wet Chemical extinguishers are effective against fires involving:
Carbon Dioxide Extinguisher:
Carbon Dioxide (CO2) fire extinguishers are recommended by New Zealand Standards for use in electronic environments. The normal capacities of this type of fire extinguisher ranges from 2kg to 5kg. The Carbon Dioxide (CO2) fire extinguisher is recommended by Australian Standards as “…the preferred extinguishant for use in electronic environmentsâ€. Carbon dioxide is extracted from the atmosphere, stored at high pressure in the liquid state within a fire extinguisher, for effective usage on Class (E) fires. Carbon Dioxide extinguishers are effective against fires involving: Electrically Energised Equipment CO2 is a non-conductive and non-corrosive agent which reduces the oxygen available to support the fire. As carbon dioxide replaces oxygen, the discharge by personnel within extremely confined spaces is discouraged. Equally, as the agent dissipates easily into the atmosphere, the effect is limited where there is air movement. |
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| Last Updated ( Thursday, 14 January 2010 01:41 ) |
A very efficient and cost effective method to combat certain types of fires, the normal capacity of this type of fire extinguisher is 9 litres. Water acts to reduce the temperature of the burning fuel so it is below its ignition point.Water extinguishers are efficient and cost effective against Class A fires involving: 
