Fire Extinguishers

There are 5 main fire extinguisher types generally in use – Water, Foam, Dry Powder, CO2 and Wet Chemical. It is important that you choose the correct type for your premises, or you may not meet current regulations.

The various types of extinguisher are then classified as to their ability and appropriateness for putting out fires that are started with different types of fuel. The risk to your premises by these 'classes’ assist in determining the most appropriate fire extinguisher types you need. Very often more than one type of extinguisher will be required.

In addition to choosing the right type of extinguisher you will also need to make sure that you have the right size and weight of fire extinguisher as well as the right kind.

Whilst there are 5 main types of fire extinguisher, there are varinats of both the Water and Dry Powder extinguishers, meaning there are in fact 8 fire extinguisher types to choose from. The 8 types of fire extinguisher are

  • Water
  • Water Mist
  • Water Spray
  • Foam
  • Dry Powder – Standard
  • Dry Powder – Specialist (for use with specific flammable metals such as Lithium
  • Carbon Dioxide (‘CO2’)
  • Wet Chemical

Classes of Fire

There are six classes of fire: Class A, Class B, Class C, Class D, ‘Electrical’, and Class F.

  • Class A fires – combustible materials: caused by flammable solids, such as wood, paper, and fabric
  • Class B fires – flammable liquids: such as petrol, turpentine or paint
  • Class C fires – flammable gases: like hydrogen, butane or methane
  • Class D fires – combustible metals: chemicals such as magnesium, aluminum or potassium
  • Electrical fires – electrical equipment: once the electrical item is removed, the fire changes class
  • Class F fires – deep fat, cooking oils: typically a chip-pan fire in a domestic situation.

Fire Rating

All extinguishers capable of extinguishing class A, B or F fires carry a fire rating which is indicated by a number and letter (eg 13A, 55B). The number is indicating the size of fire it can extinguish under test conditions. The larger the number, the larger the fire it can extinguish. The letter indicates the fire classification as above. Class C, D and the electrical symbol do not carry a numerical rating.

Maintenance

Extinguishers in commercial or public buildings should be visually inspected monthly for damage or pressure loss and should be serviced to BS 5306-3 once a year. Water, foam and powder extinguishers have to be discharged and refilled every five years. CO2 extinguishers must be refurbished after ten years. One exception, however, are the kitemarked P50 servicing-free extinguishers which only need refurbishment after ten years and do not require maintenance within the ten years (other than the monthly visual inspection and a recorded yearly visual inspection by the owners).

Adjustable wall mounting bracket suitable for 6Kg and 9Kg fire extinguishers. Formed coated steel, very strong. Features Available single or packs of 20 Adjustable fixing holes
Adjustable wall mounting bracket suitable for 6Kg and 9Kg fire extinguishers. Formed coated steel, very strong. Features Available single or packs...
£1.75
Manufactured from high quality polypropylene, these extinguisher seals are used to prevent the safety pin from dropping out of the extinguisher. They break when the pin is pulled out Features Packed in 500's Strap length 170mm Availabe in Red, White, Green, Yellow, Orange and Blue Request desired colour when ordering
Manufactured from high quality polypropylene, these extinguisher seals are used to prevent the safety pin from dropping out of the extinguisher. Th...
£20.50
A handy sized extinguisher that can be carried pretty much anywhere. Designed for use on Class A (wood, cloth, paper)and F fires(cooking oils and fats). The Flame Buddy spray is available in two handy sizes and is perfect in the home or office, and especially where its compact size makes it easy to transport, such as hiking/camping and caravanni...
A handy sized extinguisher that can be carried pretty much anywhere. Designed for use on Class A (wood, cloth, paper)and F fires(cooking oils and f...
£14.50
A range of dry powder automatic release extingusihers designed for use in space such as engine rooms, plant rooms, or any enclosed and confined spaces that require protection. A dry powder extinguishant covers most classification of fires ABCD and electrical, involving wood/paper, flammable liquids and electrical fires. The heat-sensitive glass ...
A range of dry powder automatic release extingusihers designed for use in space such as engine rooms, plant rooms, or any enclosed and confined spa...
£31.20
One of the best selling extinguishers in the Firechief XTR range, the CO2 extinguishant is harmless to delicate equipment making it ideal for office environments.The aluminium 2kg CO2 extinguisher is used for situations known as B Class Fire and electrical fires, which are those involving flammable liquids and/or electrical hazards. Features Si...
One of the best selling extinguishers in the Firechief XTR range, the CO2 extinguishant is harmless to delicate equipment making it ideal for offic...
£33.00

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