Answer. hey there !! the soda acid fire extinguisher made by reacting sodium hydrogen carbonate(nahco3) and sulphuric acid (h2so4) . a little glass container is tied along a bottle cap and the bottle contains nahco3 solution in it .

Monoammonium phosphate, ABC Dry Chemical, ABE Powder, tri-class, or multi-purpose dry chemical is a dry chemical extinguishing agent used on class A, class B, and class C fires. It uses a specially fluidized and siliconized monoammonium phosphate powder.

The calculation can be simplified by applying the rule of thumb that one 13A extinguisher covers 200 square metres of floor area. To calculate how many 13A extinguishers are required, divide the floor area by 200, and round up.

Fire Extinguisher Requirements are present in most buildings. The Regulatory Reform (Fire Safety) Order 2005 states that a minimum of two Class A fire extinguishers per floor be clearly accessible all of the time.

Fire extinguishers for use on Class A fires, flammable solids such as paper, wood, textiles, are rated on their ability to extinguish test fires. The test rating is clearly displayed on the extinguisher label. As a general rule one 13A extinguisher covers 200 square meters.

There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Multipurpose extinguishers can be used on different types of fires and will be labeled with more than one class, like A-B, B-C or A-B-C.

Fire extinguisher colour coding

• Water fire extinguishers are colour coded red.
• Foam fire extinguishers are colour coded in cream.
• Powder fire extinguishers are colour coded with blue.
• Carbon dioxide fire extinguishers are colour coded with black.

What are the fire extinguisher colours?

• Red – Water (both spray and mist)
• Blue – Dry powder.
• Cream – Foam.
• Black – Carbon dioxide (CO2)
• Yellow – Wet chemical.

The six main fire extinguisher types are water, foam, CO2, powder, water mist and wet chemical. Each of the different types of fire extinguisher is suitable for different fire classes.

The 5 Classes of Fire Extinguishers

• Class A fire extinguishers.
• Class B fire extinguishers.
• Class C fire extinguishers.
• Class D fire extinguishers.
• Class K fire extinguishers.
• Do you know how to use a fire extinguisher?

When it comes to the types of fire extinguishers, there are five main types including wet chemical, CO2, dry powder, foam and water. In order to meet the current regulations, it is important for you to have the exact type of fire extinguisher that is needed for your premises.

ABC Fire Extinguishers use monoammonium phosphate, a dry chemical with the ability to quickly put out many different types of fires by smothering the flames. This pale, yellow powder can put out all three classes of fire: Class A is for trash, wood, and paper. Class B is for liquids and gases.

To date, the only type of Class D fire extinguisher is the Dry Powder extinguisher. The powder agent used may be either powdered graphite, granular sodium chloride or copper based, all of which are effective at separating the fuel (the ignited combustible metal) from the oxygen.

The size of a fire extinguisher indicates the amount of extinguishing agent it holds and is most often measured in pounds. Sizes can range from as small as 2.5 lb. to as large as 350 lb….Common fire extinguisher sizes and their approximate weight

• 2-A:10B:C – 4 lb.
• 3-A:40B:C – 5 lb.
• 4-A:60B:C – 10 lb.
• 10-A:80B:C – 20 lb.

For a room of average dimension, a 5-lb fire extinguisher may be sufficient. For larger commercial spaces and warehouses where a fire has more room to spread, a larger 10-lb model may be necessary.

ABC or Multi-Purpose extinguishers utilize a specially fluidized and siliconized mono ammonium phosphate dry chemical. It chemically insulates Class A fires by melting at approximately 350°F and coats surface to which it is applied.

NFPA recommends one 2-A fire extinguisher for every 3,000 square feet. OSHA requires employees to have access to an extinguisher within 75 feet. Employees should have access to a fire extinguisher within either 30 or 50 feet, depending on the hazard in question and the rating of the extinguisher (see below).

(a) Fire Extinguishers and Small Hose Lines. (1) A fire extinguisher, rated not less than 2A, shall be provided for each 3,000 square feet of the floor area, or fraction thereof. Where the floor area is less than 3,000 square feet at least one extinguisher shall be provided.

To prevent fire extinguishers from being moved or damaged, they should be mounted on brackets or in wall cabinets with the carrying handle placed 3-1/2 to 5 feet above the floor. Larger fire extinguishers need to be mounted at lower heights with the carrying handle about 3 feet from the floor.

Even if there’s no expiration date, it won’t last forever. Manufacturers say most extinguishers should work for 5 to 15 years, but you might not know if you got yours three years ago or 13. If it falls anywhere else, the extinguisher is unreliable and should be serviced or replaced.

When do fire extinguishers expire? Although they don’t have a true “expiration date,” traditional fire extinguishers generally have a 10-12 year life expectancy. Disposable fire extinguishers should be replaced every 12 years.

Over time, factors such as damage, rust and corrosion can cause a fire extinguisher to lose its ability to operate properly. This is why it’s extremely important that your extinguishers be inspected and tested at the proper intervals. Perhaps the most important factor is the hydrostatic test.

Most fire extinguishers should have a pressure gauge with a red section and a green section. If the needle is in the green, you’re good. If your extinguishers don’t have a pressure gauge and you want to test them, press in the pin. If it pops back up, the extinguisher is pressurized.

Extinguishers need to have an internal examination conducted at anywhere from 1-6 year intervals depending on the type of extinguisher. For example, a dry chemical, stored pressure fire extinguisher must have an internal examination every 6 years, see NFPA 10 Table 7.3.

every 12 years

Oxygen, heat, and fuel are frequently referred to as the “fire triangle.” Add in the fourth element, the chemical reaction, and you actually have a fire “tetrahedron.” The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.

Compartment fire development can be described as being comprised of four stages: incipient, growth, fully developed and decay (see Figure 1).

During a home fire, there’s an increased level of carbon monoxide and carbon dioxide as well as damaging levels of chemical and thermal irritants. These irritants can permanently damage a person’s or animal’s respiratory system and cause death.

Fire is the product from a chemical reaction between oxygen in the atmosphere and some sort of fuel (wood or gasoline, for example). “The combustion or burning, in which substances combine chemically with oxygen from the air and typically give out bright light, heat, and smoke.

Generally, the color of a flame may be red, orange, blue, yellow, or white, and is dominated by blackbody radiation from soot and steam.