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. There are 9 ratings for Class B fire extinguishers - 21B through to 233B. A B and C are the average ratings a fire extinguisher can have. 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. Located on the fire extinguisher label is the UL rating (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. An ABC Fire Extinguisher might have a UL Rating of 4-A:80-B:C. But what do these fire extinguisher ratings mean? 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. A 175B rating uses 175 litres and so on. ABC Fire Extinguisher. 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. In most cases, the rating is a combination of numbers and letters. Class D fire extinguishers are commonly found in a chemical laboratory. Atkinsons Way, Foxhills Industrial Estate, Scunthorpe, North Lincolnshire DN15 8QJ. The number indicates the size of fire it can extinguish. 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. Foam (AFFF) 3 litre 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. Smoke alarms and fire extinguishers are two essential pieces of fire safety equipment every home should have. © 2021 Fire and Safety Centre, all rights reserved. For a more detailed explanation, read on…. After 30 hours of research, and talking to eight experts in the fire-safety industry, we found the best fire extinguisher for your home. Fire extinguishers with a Class B rating are effective against flammable liquid fires. Always err on the side of caution. ABC Dry Powder 2kg The test method involves adding water and fuel to circular metal trays (to specified sizes) before igniting and extinguishing the fire. In practice you should estimate the volume of combustibles at risk against this benchmark and select the most applicable size for the job. Fire extinguishers are classified by fire type. Double check that your fire extinguisher contains a UL rating. Fire Extinguisher UL Rating: What it Means . A fire extinguisher with a 1A rating is equivalent to 1.25 gallons of water. 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. Thus, a 4A will equal about five gallons of water. 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)). Multiply the number in front of A by 1.25 to figure out the equivalent to gallons of water. Fire Extinguisher Ratings Explained The importance of fire safety is oftentimes overlooked in favor of other everyday concerns. 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. • The numerical rating for a Class A Fire extinguisher refers to the amount of chemicals/agent in the extinguisher. The discharge time is 13 to 15 seconds and it has a discharge range of 10-15 feet. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. 2 litre foam fire extinguisher with LPCB Approval, Fire Safety Training and Risk Assessment Tools, Personal Protection Equipment and Clothing. This compact and handy 2 litre Foam Fire Extinguisher with LPCB Approval is used for combating class A & B fires (flammable solids and liquids). Fire Extinguisher Servicing. The Underwriters Laboratory (UL) rates fire extinguishers to be used on certain types of fires. Many fires are caused by electrical faults which in consequence ignite other flammables. The operating pressure is 100 psi. They are also often fitted to motor vehicles, watercraft, and aircraft - this is required by law in many jurisdictions, for identified classes of vehicles. Only AFFF foam, CO2 fire extinguishers and dry powder extinguishers are suitable for this application. It is critical that you have training and have used them to ensure your safety and others around you. 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 2A rating equals 2.5 gallons of water and a 4A rating equals 5 gallons of water. It is rated for class A, B, and C fires. Water-based Class A extinguishers may also have additives to make them more effective. This number has a different meaning for each class. Click to download Fact Sheet. Most fire extinguishers have a fire Rating printed on the canister. The revised NFP… 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. 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. 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 … 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. 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. B-rated fire extinguishers are numbered in 10s. 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. Fire Extinguisher Ratings Class A Extinguishers will put out fires in ordinary combustibles, such as wood and paper. In any event, a sensible approach is to cut off the power supply to any area where a fire occurs. A quick review: Class A: Wood, paper, cloth, plastics, trash Need to speak to someone?Simply call 01724 281044/277479. To achieve a Class “A” rating, the extinguisher must be capable of putting out the wood crib, wood panel and excelsior (shredded paper) tests. 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. Well it’s definitely not a shoe size, but a specific arrangement of combustibles used to test the extinguisher. The fire rating of the particular extinguisher is indicated by a number and letter, e.g. The LPCB approval on this AFFF fire extinguisher boasts high fire ratings. (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. A fire extinguisher’s rating consists of 2 parts: a number and a letter. These types of extinguishers also have no numerical rating, nor are they given a multipurpose rating - they … Fire extinguishers in your house, garage, car and camper help you put out small fires quickly before they spread. But deciding on the right fire extinguisher can be confusing. 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. This type of fire extinguisher (also called multi-purpose fire extinguisher) is the one that’s recommended for home use. It’s one of those few things that you buy but hope to never use. We are asked this question so many times. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. Fire extinguishers are portable devices used to extinguish small fires or reduce their destruction before firefighters arrive at the scene. Read on to learn more. Fire extinguishers are usually fitted in buildings at an easily accessible location, such as against a wall in a high-traffic area. 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. What the devil is size 13 you may ask? The number represents the chemical/agent's equivalent to gallons of water the extinguisher holds. The extinguisher label also indicates the UL rating. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish. So for example, a water additive stored pressure extinguisher coded 13A will extinguish a Class A fire of freely burning combustibles of size 13. A 34A would extinguish a stack with 34 sticks and so on, so the higher the number the bigger the fire it can extinguish. FAQ Which extinguisher type is suitable for what fire? 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. 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. 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. Only two classifications of fire include a number with the rating, Class A and B. The letter part of the rating denotes what class of blaze this fire extinguisher is suitable for. 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. Browse our full range of fire extinguishers here. 34B. (See Extinguisher Chart). 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