Fire Extinguisher 6kg Powder

[Práxedes Jamal]

The powder breaks the chain reaction of liquid and gas fires by coating the surface to which it is applied. These fires (Class B in the American system; Classes B and C in the European and Australian systems) include the burning of gasoline, oil, propane, and natural gas.[1]

It is safe and effective for electrical fires since it is a non-conductor of electricity. Fires involving live electrical equipment (Class C in the American system; Class E in the Australian system) need to be put out with equipment that will not conduct its energy back to the user as is the case with water. Electricity can also cause fires of the other classes.[1]

Chimney bombs are zip-lock bags or other small bags filled with ABC dry chemical powder. Chimney bombs are used by fire service personnel to help extinguish chimney fires. Creosote, which is the by-product of the incomplete burning of wood (typically due to chronic combustion-air insufficiency), is extinguished by the chain reaction caused by the chimney bombs. Chimney bombs work by first being dropped directly down a chimney, where upon contact with the flue bottom and heat of the fire, they explode, thereby releasing the powder. Then, the natural chimney draft will carry the dry chemical powder up the shaft of the chimney, thus coating the creosote and eventually neutralizing the fire. Use of multiple chimney bombs may be necessary, depending on how severe the fire is. Chimney bombs can also be effective if they are opened and then dropped down the chimney. In order for chimney bombs to be effective, it may be necessary to first unclog the chimney.[5][6]

ABC dry chemical is inappropriate for chlorine or oxidizer fires.[7] The resulting chemical reaction can cause an explosion or a breakdown of the chemicals releasing toxic gases. Water should be used in that case.[8][9]

ABC dry chemical is inappropriate for certain metal fires (Class-D) and does not possess a saponification characteristic and should therefore not be used on Class K / Class F fires.[10] ABC dry chemical has been found to be effective in initially ceasing combustion of oils or fats, however re-application of additional dry chemical may be necessary due to the potential for re-flash of oils or fats heated to near or at their flash point. A Class K / Class F extinguisher is more effective in controlling fires involving primarily vegetable oils as it causes a chemical change to the oils or fats making re-flash far less likely. When a Class K / Class F extinguisher is not available an ABC dry chemical extinguisher can be carefully used to control a fire involving cooking oils or fats if the operator is aware of the potential need to re-apply more chemical if the oils or fats reignite. (Class-K).[1]

A dry powder fire extinguisher is an extremely versatile extinguisher choice since it can be used on almost all fire types. That being said, it is not recommended to use a dry powder fire extinguisher in an enclosed space.

If you need servicing of your fire extinguishers, our accredited consultants will attend your sites at a time convenient to you. Contact us today to arrange a visit and decide on the future course of action.

When a minor fire breaks out at home or in your business, a portable fire extinguisher is a fast and effective response. Once the fire is out completely, it's essential to know how to clean up fire extinguisher dust and chemical residue so you can assess the real damage and mitigate health risks. The Department of Environmental Health and Safety at the University of Colorado/Boulder reports, "Type ABC multi-purpose fire extinguishers contain ammonium phosphate and/or ammonium sulfate powder that can be irritating to the eyes, skin and lungs." Because the chemicals used in various fire extinguishers can be harmful to humans (and pets), it's important to follow proper cleaning procedures after using one.

Safety tip: Throw away all food or cooking grease that has come into contact with any type of fire extinguisher dousing agent. A portable fire extinguisher is an essential safety device for all homes, business and other public buildings. However, some fires are too big for portable extinguishers. Know when to call 911 for the help of professional fire fighters. Regardless of fire size, ServiceMaster Restore can provide professional fire cleanup services with fast, effective remediation for any smoke and water damage as well.

No one today would argue the benefits of portable fire extinguishers. According to the latest data, portable fire extinguishers are extremely effective in controlling small fires. But some of them do leave a mess to clean up, which in some cases can cause additional damage if not done quickly. This post will provide some guidelines for cleaning up fire extinguisher residue and address some of the common safety concerns associated with the task.

Common extinguishing agents include dry chemicals, wet chemicals, and clean agents. All fire extinguishers are required to be labeled with either a sticker and/or a tag that identifies the type of fire extinguisher it is and the type of extinguishing agent it contains.

Fire extinguishing residues are generally non-toxic, particularly in the amounts you might expect when cleaning up after the use of a portable fire extinguisher. There are a few general precautions you should take regardless of the type of fire extinguisher used, as some can irritate the skin. Always avoid direct contact with any residue by wearing latex or rubber gloves to protect the hands and clothing that covers the arms and legs.

Cleaning up fire extinguisher residue typically does not require expensive personal protective equipment (PPE). However, the chemicals in some fire extinguishers can also cause significant irritation to mucous membranes in the nose and mouth if inhaled and can irritate the eyes. For these types of clean-ups, it is important to wear a dust mask and safety goggles. Dust masks with a NIOSH rating of N95 or N100 will filter out 95-100 percent of the tiny particles found in fire extinguishers.

Before cleaning begins, you should always consult the material data safety sheets (MSDS), now called safety data sheets (SDS). Both provide extensive and detailed information regarding the chemicals in the residue you will be cleaning up, including any safety risks and appropriate types of first aid.

First aid information is provided here to simply to underscore the fact that fire extinguisher chemicals are generally quite safe. Nonetheless, it is still important to always take the time to consult the MSDS/SDS before clean-up begins to ensure that you know all the risks involved as well as the proper way to dispose of the chemical residue collected.

Dry chemical fire extinguishers work with a pressurized spray of a dry chemical that will blanket a fire and extinguish it. The most common agents used in dry chemical fire extinguishers are monoammonium phosphate and sodium or potassium bicarbonate. Time is of the essence when this type of extinguisher is used because these powders can be corrosive to metals and can lead to further damage if not cleaned up quickly.

Any electrical contacts with residue on them should be cleaned with an electrical contact cleaner, which is typically a compressed air canister containing a cleaning agent that evaporates quickly, such as isopropyl alcohol.

It is always a good idea, if possible to first shut down the ventilation system in the area to be cleaned to avoid resuspending the powdery residue. It may be tempting to vacuum it up. But before you do, you need to know specifically what type of dry chemical agent was used.

Monoammonium phosphate fire extinguishers are used to put out Class ABC fires. This type of residue must be cleaned by hand because it can irritate the skin and eyes if resuspended in the air with a vacuum cleaner. If this type of extinguisher was used, you can remove residue from the floor by wet-sweeping or sweeping with a dust suppressant.

Monoammonium phosphate residue on surfaces should be wiped away with a clean, dry cloth or brush. According to a 2013 study, soot erasers were also found to be effective for cleaning dry chemical residue on some types of materials. Soot erasers are sponges made of natural rubber that can be used to lift away dust, dirt, and soot from dry surfaces without getting it wet.

For surfaces that can be safely wet-washed, a cleaning paste made with equal parts baking soda and hot water can be used. Once applied, the paste should be allowed to sit on the surface for a few minutes before wiping it away with a damp cloth. Residue that has hardened or adhered to surfaces can be cleaned with a 1:1 solution of isopropyl alcohol and warm water, which will help to break down the silicone used in this type of extinguishing agent.

Sodium and potassium bicarbonate residues are not as caustic as monoammonium phosphate residue. Given this, they can be safely removed with a vacuum equipped with the high-efficiency particulate air (HEPA) filter.

Bicarbonate-based residues on surfaces can be cleaned in the same manner as monoammonium phosphate with a clean, dry cloth or brush. For surfaces that can be safely wet-washed, an effective cleaning solution for these types of residue can be made by adding approximately three ounces (six tablespoons) of vinegar to a gallon of hot water.[2]

Another type of dry chemical fire extinguisher is the Class D dry powder extinguisher, which is used specifically for combustible metal fires that can occur in industrial, manufacturing, or laboratory settings where there may be concentrations of metal shavings and/or dust that could ignite. The extinguishing agent used in Class D dry powder fire extinguishers will vary based on the specific types of metals found in the setting they are used to protect but will usually contain one of the following:

Some of these residues will clean easily, while others may require the assistance of professionals who are equipped to address the specific requirements of each. Graphite-based powders, for example, are sensitive to static charge and can become combustible if airborne making it dangerous to clean with a vacuum. Given the different types of agents used in Class D fire extinguishers, it is important to first consult the MSDS/SDS before attempting a clean-up.

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