Class A: SOLIDS such as paper Cheap Derrius Guice Jersey , wood, plastic etc Class B: FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc Class C: FLAMMABLE GASES such as propane, butane Cheap Da''Ron Payne Jersey , methane etc Class D: METALS such as aluminium, magnesium, titanium etc Class E: Fires involving ELECTRICAL APPARATUS Class F: Cooking OIL & FAT etc
Water Fire Extinguishers: The cheapest and most widely used fire extinguishers. Used for Class A fires. Not suitable for Class B (Liquid) fires, or where electricity is involved.
Foam Fire Extinguishers: More expensive than water, but more versatile. Used for Classes A & B fires. Foam spray extinguishers are not recommended for fires involving electricity Cheap Landon Collins Jersey , but are safer than water if inadvertently sprayed onto live electrical apparatus.
Dry Powder Fire Extinguishers: Often termed the ulti-purpose?extinguisher, as it can be used on classes A, B & C fires. Best for running liquid fires (Class B). Will efficiently extinguish Class C gas fires, BUT BEWARE, IT CAN BE DANGEROUS TO EXTINGUISH A GAS FIRE WITHOUT FIRST ISOLATING THE GAS SUPPLY. Special powders are available for class D metal fires.
CO2 Fire Extinguishers: Carbon Dioxide is ideal for fires involving electrical apparatus Cheap Wes Martin Jersey , and will also extinguish class B liquid fires, but has NO POST FIRE SECURITY and the fire could re-ignite.
Wet chemical Specialist extinguisher for class F fires.
For Metal Fires: A specialist fire extinguisher for use on Class D fires - metal fires such as sodium, lithium, manganese and aluminium when in the form of swarf or turnings.
Colour Coding
Prior to 1st Jan 1997, the code of practice for fire extinguishers in the UK was BS 5423 Cheap Bryce Love Jersey , which advised the colour coding of fire extinguishers as follows:
Water - Red
Foam - Cream
Dry Powder - Blue
Carbon Dioxide (CO2) - Black
Halon - Green (now ''illegal'' except for a few exceptions such as the Police, Armed Services and Aircraft).
New extinguishers should conform to BS EN 3, which requires that the entire body of the extinguisher be coloured red. A zone of colour of up to 5% of the external area can be used to identify the contents using the old colour coding shown above. Total Views: 180Word Count: 343See All articles From Author
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