Most readers will find this article to be really familiar specially these who go on safety refresher courses regularly in the line of their perform.
For some it could be altogether new or extended forgotten details may resurface in the memory bank of the brain. For a fire to start and keep alive all of the 3 legs of the fire triangle should be present and ideally in the correct proportions. It consists of, 1: a combustible material, 2: heat and 3: oxygen (or air).
By removing any one of the 3 “legs of the triangle”, the fire will go out. Removing the combustible supplies is recognized as “starvation” removing heat is by cooling with water and removing oxygen (or air) by smothering. To cover the fire with a fire blanket, sand or an inert gas smothers the fire effectively. These are the three basic and basic ways of fighting fires.
There are some considerations to take into account ahead of deciding on the method of fighting the fire at hand. Ninety percent of fires can be extinguished by cooling with water but the remaining ten % could finish disastrous when water is used.
The 3 widespread classes of fire are A, B and C Class D being metals which will not be discussed in this write-up. Class A fires are all carbon-primarily based supplies like paper, wood, rags and so forth class B fires involve flammable liquids like gasoline, oil, paint and so on class C fires involve live electrical energy.
For ordinary class A fires, water in a bucket, a garden hose or a bigger volume of water will be efficient, depending on the size and intensity of the fire. Some degree of starvation could also work well to save more of the supplies depending on the situations.
Class B fires are considerably more complex and must be handled with great care. Never fight liquid fires with water. These fires are fought by smothering with a fire blanket or an inert gas like CO2 (carbon dioxide), or by the use of dry chemical powder. The action of dry chemical powder is actually by interfering with the chemical reaction of the fire but can be observed as smothering for the scope of this write-up.
With class C fires, which involve live electrical energy, it might be possible to change the class by switching off or disconnecting the power. With the power isolated, the class of the fire is then changed to most possibly A exactly where the garden hose can be utilized to do the rest. If isolation of the power is not feasible, the fire must be attacked with a nonconductive extinguishing agent like CO2 or dry chemical powder. In some countries, earth leakage devices are compulsive on all household and industrial electrical installations where, if the installation is completed correctly, the device will reduce the power as quickly as the water tends to make contact with the energy supply to earth with no electrocuting the operator.
The conclusion is to cease for a moment in the presence of fire, keep as calm as achievable (not effortless), observe the components on fire and the extend of the fire this might make all the distinction. When acting, do it quickly and efficient. If the fire is too large or fierce and attempts to put it out fail, do not get hurt, get out, close doors and windows on the way out to limit oxygen supply to the fire and get the specialists to manage it.