Thursday 5th April 2012
What is the fire triangle?
The fire triangle is made up of three elements, which are the three components needed for a fire to start and burn: fuel, oxygen and heat. Removing one of these elements will prevent the fire from spreading and causing irreversible damage. Fire protection equipment will help you and your staff break the triangle, reducing potential risks of damage to a building or loss of life.
The three elements of fire explained
Heat
Heat must be present for a fire to ignite. Flammable materials constantly release flammable vapours, where heat is present, these vapours will ignite and start to burn.
Once a fire has started, heat from the fire will dry and remove moisture from surrounding materials (fuel), which results in the fire spreading.
Fuel
A fire needs fuel to burn and feed it. Fuel can be in the form of any combustible material such as paper, wood, textiles, oil, liquids etc. Removing the fuel will prevent a fire from spreading or starting in the first place.
Oxygen
Without oxygen, a fire cannot ignite and continue to burn. Oxygen is all around, making this one of the most significant factors of the fire triangle.
How does fire safety equipment break the fire triangle?
Installing fire safety equipment, such as fire extinguishers and fire blankets, can help stop a small fire from spreading. Fire blankets deprive the flame of oxygen by covering it, killing the fire.
Many fire extinguishers, such as foam and water fire extinguishers, work in the same way; either by covering the flame and its fuel to remove oxygen, or by cooling the fire and any nearby fuel, reducing the risk of the fire spreading. Water Mist fire extinguishers deploy a cooling mist, and are safe to use on live electrical equipment up to 1000V, making them an ideal extinguisher for businesses, education, hospitality and the care sector.
Although fire safety equipment can be a useful tool in stopping a small fire from spreading, a fire should only be tackled if staff are trained to use them, and are confident in what they are doing.
Fire Safety Training Courses
To prepare your staff to effectively extinguish fires, there are a variety of on-site fire safety training courses available. This includes fire safety awareness and fire warden training, as well as evacuation training to ensure that staff can escape to a place of safety until the fire is under control. These training courses will not only reduce the risk of a fire breaking out on your premises by enabling staff to reduce the risk of fire in their daily duties, but also improve responses and outcomes in the event of a fire.
Preventing a fire from starting in the first place is always the best form of fire safety. Encourage staff to keep an eye out for potential causes of fire, such as faulty electrical equipment or hazardous materials, and use flammable liquid storage cabinets to reduce the risk of these flammable liquids igniting.
Employers are required by law to ensure that all employees receive adequate fire safety training. Employers must also provide adequate equipment, such as evacuation chairs and evacuation sheets, to ensure everyone in the building can safely evacuate.
For more information about the best fire safety equipment for your business, or to arrange a site survey, contact us today.
Frequently Asked Questions (FAQs)
What are the three elements of the fire triangle?
The three elements of the fire triangle are heat, fuel and oxygen. These three components are essential for a fire to start and continue burning. Understanding the three elements of the fire triangle is fundamental to fire safety. Heat provides the ignition source that allows flammable vapours to ignite. Fuel gives the fire something to burn and feed on, which can be paper, wood, textiles, oils or other combustible materials. Oxygen, which is present in the air around us, supports combustion. When all three elements come together, a fire can start and spread. Fire safety equipment works by breaking the fire triangle, removing one of these critical elements to extinguish flames.
What element of the fire triangle does a fire blanket remove?
A fire blanket removes the oxygen element of the fire triangle. When you place a fire blanket over flames, it creates a barrier between the fire and the surrounding air, cutting off the oxygen supply. What element of the fire triangle a fire blanket removes is important to understand because, without oxygen, combustion cannot continue, and the fire will die out. Fire blankets are designed to be placed over small fires, completely covering them to prevent oxygen from reaching the flames. This makes fire blankets particularly effective for small contained fires, such as small frying pan fires or waste bin fires, where smothering is an appropriate extinguishing method.
What do foam extinguishers remove from the triangle?
Foam extinguishers remove both oxygen and heat from the triangle. When you discharge a foam extinguisher onto a fire, the foam creates a blanket over the fuel surface, separating it from oxygen in the air. Additionally, the water content in foam extinguishers helps remove the heat element from the fire triangle by providing a cooling effect. The foam works by floating on flammable liquids, preventing flammable vapours from rising and mixing with oxygen while simultaneously cooling the fuel below its ignition temperature. This dual-action makes foam extinguishers particularly effective for fires involving flammable liquids such as petrol, diesel or oils.
What element of the fire triangle does a fire blanket remove and therefore put out a fire?
A fire blanket removes the oxygen element of the fire triangle and therefore puts out a fire by smothering it. When considering what element of the fire triangle a fire blanket removes and therefore puts out a fire, understanding this smothering action is essential. Fire blankets are typically made from fire-resistant materials that can be safely placed over a small fire to create an airtight seal. This seal prevents oxygen from reaching the flames, which interrupts the combustion process. Without access to oxygen, the chemical reaction that sustains a fire cannot continue, and the flames will extinguish. This makes fire blankets an effective tool for tackling small, contained fires – particularly in kitchens or laboratories.
A fire blanket removes which element of fire?
The answer is oxygen. Fire blankets are designed to completely cover a fire, creating a barrier that prevents oxygen from reaching the flames. By removing this crucial element from the fire triangle, the combustion process cannot continue. When you place a fire blanket over a fire, you’re effectively cutting off its air supply. Fire blankets are particularly useful for small fires that can be completely covered, such as pan fires in kitchens or clothing fires. Remember that fire blankets should only be used by people who have been properly trained in their use and when it’s safe to approach the fire.
What element of the fire triangle does the blanket remove?
You stop combustion and extinguish a fire by removing at least one of the three elements of the fire triangle: heat, fuel or oxygen. Different fire extinguishing methods target different elements. Water-based extinguishers primarily remove heat by cooling the burning material below its ignition temperature. Foam extinguishers create a barrier that removes both oxygen and heat. Powder extinguishers interrupt the chemical chain reaction of combustion. CO2 extinguishers displace oxygen. Fire blankets remove oxygen by smothering the flames. The most appropriate method depends on the type and size of fire you’re dealing with. Always ensure you’re trained in proper fire safety techniques before attempting to extinguish any fire, and prioritise evacuation to a place of safety if the fire is too large or spreading quickly.
When would it be appropriate to smother a fire with a fire blanket?
It would be appropriate to smother a fire with a fire blanket when dealing with small, contained fires, particularly those involving cooking oils or fats in kitchen pans or when a person’s clothing has caught fire. Fire blankets work by removing oxygen from the fire triangle, making them ideal for situations where the fire is limited to a small area that can be completely covered. They are also usually suitable for fires involving small electrical appliances such as toasters or hairdryers in their early stages, as the blanket provides insulation from electrical current. However, you should only attempt to smother a fire with a fire blanket if you’ve been trained in its proper use, if the fire is small enough to be completely covered, and if you can safely approach the fire without putting yourself at risk.