London And Home Counties Fire Protection  can supply thousands of fire protection related goods which include fire extinguishers, fire blankets, fire hose reels, fire extinguisher stands boxes and trolleys, fire safety signs and wheeled fire extinguishers. Should you not find a item you require just contact us and we will endeavour to fulfil your request.
 
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Page Last Updated 20th June 2012
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Fire extinguishers within commercial building, churches, stadiums etc are required by law and in most circumstances your insurance will stipulate that they are both installed and maintain within your building.  Further to this they are installed to give the occupier a chance to extinguish or control small fires, remember most fire start small and can be extinguished with a portable fire extinguisher. 
 
Fire extinguishers come in various types, sizes and versions, it is important that the correct extinguisher is install to cover the risks present.  The extinguisher types are
Water Fire Extinguishers 
Foam Fire Extinguishers 
Powder Fire Extinguishers 
Co2  Fire Extinguishers 
Wet Chemical  Extinguishers 
These are the cheapest of the portable fire extinguishers and are for use on Class A, solids such as wood, paper, leaves, sugar, straw, plastic etc.  Also available under water types are the water spray and water with additive extinguishers, these both have the advantage of being smaller and electrically non conductive over the standard 9Ltr water jet extinguisher.
Foam extinguishers are for use on the same Class A solids as the water extinguishers, but can also be used on Class B flammable liquids such as petrol, diesel, paraffin, white spirit, paint and  includes liquefiable solids such as wax, grease, margarine and shoe polish.  also available under foam types are the foam spray  extinguishers, these both have the advantage of being smaller and electrically non conductive over the standard 9Ltr branchpipe type extinguisher. Foam is not recommended for cooking fat/oil fires.
ABC Dry Powder extinguishers are for use on the same Class A, Class B fires as defines above but can also be used on gas fires such as propane, butane, acetylene, hydrogen, ammonia, methane and ethylene.  It is a versatile extinguisher but is not ideal in confined spaces or in buildings as it reduces visibility and can cause damage from its messy extinguishing agent. There are special powder extinguishers on the market to cover class D, metal fires. These include magnesium, aluminium, titanium, sodium, lithium, caesium, manganese, cobalt, cadmium and potassium.
The Wet Chemical or Class F fire extinguisher is designed for fires involving cooking fats and oils. The extinguisher has a low velocity applicator come lance, this means the operator is kept away from the fire and the risk of splashing the oil about when applying the foam solution is reduced.  These extinguishers are electrically non conductive and have been designed with chip shops, restaurants and fast food outlets in mind.
Co2 extinguisher provides suburb fire fighting properties when dealing with fires involving electricity.  As the extinguishing agent is a gas it can cases and cabinets containing electrical items very quickly and easily. Ideal for fires within photocopiers, computers, electrical switchgear and computer screens.  It is a very clean extinguishing agent. Co2 can be used on flammable liquid, Class B fires.  Extreme caution must be taken not to put the discharge horn too close to the burning liquid, they also have no post fire security and the liquid could burst back into flames.

Why do I need a fire extinguisher?

Principles of Fire

Fire (combustion) is a rapid, persistent chemical change that releases heat and light and is accompanied by flame and broadly speaking the fire requires three elements to exist, these are
  • Fuel
  • Air
  • Heat
  • There are exceptions to this statement, the occurrences of these exceptions are both few and very specialised in character.
     
    The fire triangle symbol has been used for years to easily explain the  process of combustion.
    Triangle Of Combustion
    Remove any side of the triangle and the fire (combustion) can not exist

    Methods of Extinguishing Fires

    Using the diagram above you can see that by removing any of the three elements from the triangle and the fire can not exist, the three main methods of extinguishing a fire are
     
    Triangle Of Combustion - Heat Removed
    Cooling
    i.e. removing the heat
    Triangle Of Combustion - Oxygen Removed Triangle Of Combustion - Fuel Removed
    Starving 
    i.e. removing the fuel
    Starving is not always practice but can be the preferred method.
     
    Cooling and smothering are the methods that are most widely used.
     
    Some fire extinguishers such as Dry Powder interrupt the chain reactions of combustion of Class B&C Fires and extinguish Class A fires by chemical and physical reactions of the various ingredients of the Dry Powder extinguishing media.
    Smothering 
    i.e. removing the Oxygen
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