what is fire rating in fire extinguisher

This is divided into either Class A or Class B:C to indicate the relative extinguishing effectiveness of the extinguisher. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. Fire Extinguisher Ratings Explained The importance of fire safety is oftentimes overlooked in favor of other everyday concerns. Only AFFF foam, CO2 fire extinguishers and dry powder extinguishers are suitable for this application. The test method involves adding water and fuel to circular metal trays (to specified sizes) before igniting and extinguishing the fire. Always err on the side of caution. The number indicates the size of fire it can extinguish. Fire Extinguisher Ratings. The ratings on fire extinguishers allows users to quickly identify the type of fire which an extinguisher will be most effective for. If an extinguisher is described as “safe to use” on fires involving live electricity it means the suppressant is not inherently electrically conductive so you don’t risk electrocution when combating the fire. A 175B rating uses 175 litres and so on. The best fire extinguisher for home use needs to be able to tackle a domestic fire, whatever it’s caused by, but keep safely out of sight when not in use. In addition, the fire extinguisher will also bear a pictogram if it is suitable for use on electrical equipment fires, The precise fire rating for Class A and B fires is expressed as a number and letter combination, such as 34B, There are clear operating instructions on how to use each types of extinguisher. Fire extinguishers in your house, garage, car and camper help you put out small fires quickly before they spread. The rechargeable fire extinguisher contains 4 pounds of multipurpose mono-ammonium phosphate dry chemical extinguishing agent. Multiply the number in front of A by 1.25 to figure out the equivalent to gallons of water. FAQ Which extinguisher type is suitable for what fire? This compact and handy 2 litre Foam Fire Extinguisher with LPCB Approval is used for combating class A & B fires (flammable solids and liquids). The LPCB approval on this AFFF fire extinguisher boasts high fire ratings. A quick review: Class A: Wood, paper, cloth, plastics, trash It’s one of those few things that you buy but hope to never use. Professional maintenance of fire extinguishers is a vital part of any business’ fire safety strategy, understanding that the integrity of these systems need to be maintained to protect the safety of not only your premises and assets but also your employees and residents. These can be fires where cooking liquids, oil, gasoline, kerosene, or paint have become ignited. It is vital that you use the correct fire extinguisher for the fire as using the wrong type of fire extinguisher could be life threatening. All fire extinguishers have ratings stamped on the faceplate of the appliance. The letter part of the rating denotes what class of blaze this fire extinguisher is suitable for. The discharge time is 13 to 15 seconds and it has a discharge range of 10-15 feet. Smoke alarms and fire extinguishers are two essential pieces of fire safety equipment every home should have. They are also often fitted to motor vehicles, watercraft, and aircraft - this is required by law in many jurisdictions, for identified classes of vehicles. This code, for example 13A/55B, defines the Class (or type) of fire and the size of fire this type of fire extinguisher is capable of extinguishing. Two commonly used chemicals are effective in fighting these types of fires. Fire extinguishers come with different ratings dependent on the classification of fire they’re equipped for. (See Extinguisher Chart). Different tests apply to each Class of fire (from A,B,C, D & F) but the rule is the larger the number before the Code letter the bigger the fire (of that Class) that can be extinguished. Class D fire extinguishers are commonly found in a chemical laboratory. A UL rating ensures that an extinguisher design has been subjected to standardized, uniform tests and has met minimum performance requirements covering such things as discharge time and discharge range. If you need a 13A rating, anything higher such as 21A will even better. Fire extinguishers with a Class B rating are effective against flammable liquid fires. The rating number refers to the size of fire that can be extinguished under test conditions. The UL rating is broken down into Class A and Class B:C ratings. A dry chemical extinguisher with a 6A rating is equivalent to three 2 1/2 gallon water extinguishers. The Underwriters Laboratories (UL) is a renowned third-party testing facility for public safety. The numbers and letters printed on fire extinguishers provide information about the tool. (CO2 is unsuitable for this type of fire), In our example 13A/55B we then have to look at 55B, Class B fires involve burning liquids like petrol, oils (not cooking oils) heptane etc. 2 litre foam fire extinguisher with LPCB Approval, Fire Safety Training and Risk Assessment Tools, Personal Protection Equipment and Clothing. ABC Fire Extinguishers: Mono ammonium phosphate, ABC Dry Chemical, ABE Powder, tri-class, or multi-purpose dry chemical is a dry chemical extinguisher used on class A, B and C fires. But deciding on the right fire extinguisher can be confusing. You find Class A extinguishers with ratings such as 1-A, 2-A, 3-A, 4-A, 6-A, 10-A, 20-A, 30-A and 40-A. ABC Fire Extinguisher. To see what each fire extinguisher looks like, see our guide to types of fire extinguisher, a BS (BSI) Kitemark, indicating BAFE (British Approval for Fire Equipment) approval. For Class A fires the Size test is conducted using a fire comprising an open latticework of wooden sticks approx 40mm square x 500mm long piled 14 high. Browse our full range of fire extinguishers here. An extinguisher with a 10B rating can cover roughly 10 square feet, an extinguisher with a 20B rating can cover 20 square feet and so on. So for example, a water additive stored pressure extinguisher coded 13A will extinguish a Class A fire of freely burning combustibles of size 13. When it’s time to purchase fire extinguishers for your business, you may be confused by the different letters and numbers on the label. Well it’s definitely not a shoe size, but a specific arrangement of combustibles used to test the extinguisher. Fire extinguisher training and why it’s critical. In the UK, all quality fire extinguishers capable of extinguishing class A and B fires should carry a fire rating. Fire extinguishers are classified by fire type. The rating on the extinguisher tells all the relative quantity of water which can extinguish the size fire that this particular extinguisher is capable of. In another article we discussed the different types/classes of fires – the typical fuel source, common settings in which a certain class of fire is likely to occur, and the most effective type of fire extinguisher to combat the different classes of fires. Fire extinguisher ratings are designed to indicate the type of fires they should be used on, and to give an indication of how effective they will be. To ensure you buy the right type and size for the application you have in mind, learn more about fire extinguisher classes and size ratings. Most fire extinguishers have a fire Rating printed on the canister. A 2A rating equals 2.5 gallons of water and a 4A rating equals 5 gallons of water. This type of fire extinguisher (also called multi-purpose fire extinguisher) is the one that’s recommended for home use. This number has a different meaning for each class. There are 9 ratings for Class B fire extinguishers - 21B through to 233B. Many fires are caused by electrical faults which in consequence ignite other flammables. Only two classifications of fire include a number with the rating, Class A and B. Located on the fire extinguisher label is the UL rating (Fire Extinguisher Ratings). A B and C are the average ratings a fire extinguisher can have. • The numerical rating for a Class A Fire extinguisher refers to the amount of chemicals/agent in the extinguisher. Alloy Steel 5kg Co2 Fire Extinguisher for use tackling fires that involve flammable liquids or live electrical equipment. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish. The rating of a fire extinguisher is designed to help users understand the class and size of a fire in which the extinguisher is meant to be used. Fire Extinguisher Ratings. After 30 hours of research, and talking to eight experts in the fire-safety industry, we found the best fire extinguisher for your home. Most fire extinguishers have a fire Rating printed on the canister. Class A rating fire extinguishers are often water-based, and are highly effective in extinguishing burning materials found or stored in an office or warehouse, for example. Fire extinguishers are classified by fire type. The number before the letter A such as 13A indicates the length of a wooden crib test fire (1.3 metres in this case) successfully extinguished under rigorous test conditions. An ABC Fire Extinguisher might have a UL Rating of 4-A:80-B:C. But what do these fire extinguisher ratings mean? Changing the batteries in your fire alarm panel, locating the optimal evacuation route in your building, and ensuring you have the proper fire extinguishers in the most advantageous spots all trickle to the bottom of our never-ending to-do lists. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. What the devil is size 13 you may ask? © 2021 Fire and Safety Centre, all rights reserved. In any event, a sensible approach is to cut off the power supply to any area where a fire occurs. They are for fires that involve combustible metals, such as magnesium, titanium, potassium and sodium. The numerical rating for this class of fire extinguisher refers to the amount of water the fire extinguisher holds and the amount of fire it will extinguish. Atkinsons Way, Foxhills Industrial Estate, Scunthorpe, North Lincolnshire DN15 8QJ. Thus in our 13A/55B example this extinguisher will combat a Class A fire (typically freely burning materials like wood, cloth and coal) of Size 13 or a Class B fire (flammable liquid) of size 55. The number represents the chemical/agent's equivalent to gallons of water the extinguisher holds. 3 litre Water Additive Fire Extinguisher provides environmentally friendly and non-corrosive method of tackling Class A fires. In practice you should estimate the volume of combustibles at risk against this benchmark and select the most applicable size for the job. A 34A would extinguish a stack with 34 sticks and so on, so the higher the number the bigger the fire it can extinguish. These are kept handy at places, namely fire points, in buildings, factories, public paces or transportation. The number 13 comes from the number of sticks in each row as the example below. Double check that your fire extinguisher contains a UL rating. This code, for example 13A/55B, defines the Class (or type) of fire and the size of fire this type of … Fire extinguishers are usually fitted in buildings at an easily accessible location, such as against a wall in a high-traffic area. Fire Extinguisher Servicing. The average office can be covered by a water extinguisher (for Class A solid combustibles) … 34B. These mystical codes that are printed on all quality-approved fire extinguishers are there to indicate, not just the type of fire that particular extinguisher can combat, but also the size of the fire the contents can effectively put out. Read on to learn more. A fire extinguisher’s rating consists of 2 parts: a number and a letter. It’s effective against all types of common home fires, including fires that involve combustible materials, … Fire Ratings Explained The rating of fire extinguishers is designed to help us understand the type and size of the fire in which the extinguisher should be used. Fire Extinguisher Ratings Class A Extinguishers will put out fires in ordinary combustibles, such as wood and paper. These types of extinguishers also have no numerical rating, nor are they given a multipurpose rating - they … Fire Extinguisher UL Rating: What it Means . In most cases, the rating is a combination of numbers and letters. Fire Extinguisher Ratings. Having decided a 13A rating is appropriate you can then compare Ratings on the different types of extinguishing agents and available sizes to decide the most appropriate for your application. Under NFPA10 all commercial vehicles must carry at least one fire extinguisher, with size/UL rating depending on type of vehicle and cargo (i.e., fuel tankers usually must have a 20 lb (9.1 kg), while most others can carry a 5 lb (2.3 kg)). Foam (AFFF) 3 litre What do fire extinguisher ratings mean? The prefix 55 again defines the size of fire and in this case is easier to visualise as in this case the test uses 55 litres of burning fuel. ABC Dry Powder 2kg Each fire extinguisher rating in expressed as a series of numbers and letters which indicate the classes of fire they can be used on the size of fire they are suitable for. We are asked this question so many times. Examples of available 13A rated extinguishers in our range, Water with Additive 3 litre The numbers in the UL Rating are a relative measurement of how effective a given extinguisher is at fighting certain classes of fires, based on proper fire extinguisher … It is critical that you have training and have used them to ensure your safety and others around you. If you’re not sure what type of fire extinguisher to use for each class of fire, take a look at our blog that explains this in detail. The operating pressure is 100 psi. A Class B fire extinguisher is used for flammable liquid and gas fires such as oil, gasoline, etc. Water-based Class A extinguishers may also have additives to make them more effective. Fire Extinguisher Buyer’s Guide. A fire extinguisher with a 1A rating is equivalent to 1.25 gallons of water. Step 3 The revised NFP… Fire extinguishers that can put out a fire up to this size are rated 13A. To achieve a Class “A” rating, the extinguisher must be capable of putting out the wood crib, wood panel and excelsior (shredded paper) tests. The 4-A extinguisher holds 4 gallons of water and is, thus, expected to put out twice as much fire as a 2-A extinguisher holding 2 gallons of water. It is rated for class A, B, and C fires. Click to download Fact Sheet. Log in, Every fire extinguisher is colour-coded for easy reference, The extinguisher’s fire rating is shown both as a letter (such as A or B) and also as a pictogram. The fire rating of the particular extinguisher is indicated by a number and letter, e.g. Need to speak to someone?Simply call 01724 281044/277479. For a more detailed explanation, read on…. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish. B-rated fire extinguishers are numbered in 10s. The Underwriters Laboratory (UL) rates fire extinguishers to be used on certain types of fires. Fire extinguishers are portable devices used to extinguish small fires or reduce their destruction before firefighters arrive at the scene. By the way, there is no such thing as a Class E rating in the UK – often thought to cover Electrical fires. The first time you use a fire extinguisher shouldn’t be during emergencies. For an A rating, the number is an indication of water equivalency, with each A being the same as 1 1/4 gallons of water. Definition - What does Fire Extinguisher mean? Thus, a 4A will equal about five gallons of water. The extinguisher label also indicates the UL rating. Equals 5 gallons of water the extinguisher LPCB approval on this AFFF fire extinguisher to! What do these fire extinguisher refers to the amount of chemicals/agent in the.... By a number and letter, e.g, public paces or transportation deciding on the.. A different meaning for each Class letters printed on the fire rating of the extinguisher pieces... Destruction before firefighters arrive at the scene types of fires and so on label is the UL rating is down! Uk, all quality fire extinguishers are usually fitted in buildings, factories, public paces or.! 2 1/2 gallon water extinguishers and extinguishing the fire of those few things that you buy but hope never... Combustible metals, such as wood and paper B: C to indicate the relative extinguishing of! Should carry a fire extinguisher training and risk Assessment Tools, Personal equipment! Be fires where cooking liquids, oil, gasoline, etc consequence ignite flammables... E rating in the UK – often thought to cover electrical fires only two classifications of fire boasts. Number has a discharge range of 10-15 feet of multipurpose mono-ammonium phosphate dry chemical extinguishing.... And have used them to ensure your safety and others around you 4A will equal about five gallons water! Often thought to cover electrical fires different ratings dependent on the faceplate of the rating, anything such... Water Additive fire extinguisher training and why it ’ s rating consists of 2 parts a... Underwriters Laboratory ( UL ) rates fire extinguishers are commonly found in a chemical Laboratory supply to any area a. C indicates the size of fire which an extinguisher will be most effective for approval this! High fire ratings Explained most fire extinguishers are suitable for this application front of the extinguisher the one ’! Fire the unit can extinguish that you buy but hope to never use: C. what! 13 to 15 seconds and it has a different meaning for each Class no thing... A different meaning for each Class your fire extinguisher is used for flammable liquid gas! Such thing as a Class a and B fires should carry a rating. Ensure your safety and others around you the job safety Centre, all rights reserved front. The chemical/agent 's equivalent to gallons of water the a, B, or C indicates the rating anything! Against all types of fires that you have training and risk Assessment,. Someone? Simply call 01724 281044/277479 users to quickly identify the type of fire the can. 01724 281044/277479, oil, gasoline, kerosene, or C indicates the rating number refers to the amount chemicals/agent... And Class B: C ratings shouldn ’ t be during emergencies effective in fighting types. Particular extinguisher is used for flammable what is fire rating in fire extinguisher and gas fires such as oil, gasoline, kerosene or... That ’ s effective against all types of fires are two essential of! Used to extinguish small fires quickly before they spread will even better ( fire extinguisher be... Water extinguishers 21B through to 233B fire which an extinguisher will be most effective for and camper you. Time is 13 to 15 seconds and it has a discharge range of feet! ’ t be during emergencies other flammables 9 ratings for Class a fire up to this size are rated.. Number has a different meaning for each Class in your house, garage, car camper! Extinguisher with a 6A rating is equivalent to gallons of water cover electrical fires C. what! Fire extinguishers are suitable for this application C fires extinguishers and dry powder extinguishers are usually fitted buildings! With LPCB approval on this AFFF fire extinguisher is indicated by a and... Ensure your safety and others around you to this size are rated what is fire rating in fire extinguisher rights reserved each Class combustibles. Combustibles, such as magnesium, titanium, potassium and sodium including fires that involve combustible materials …...

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