Skip to main content

(DCP) Dry Chemical Powder Fire Extinguisher | MSDS for ABC

(DCP) Dry Chemical Powder - Fire Extinguisher

    A dry chemical extinguishing agent used on Class AClass B and Class C fires are known as Monoammonium-phosphate, ABE powder, ABC Dry Chemical, Tri-class or Multi - purpose Dry Chemicals.

(DCP) Dry Chemical Powder Fire Extinguisher

    It uses a special liquid and silicone monoammonium phosphate powder.  The ABC dry chemical is usually a mixture of monoammonium phosphate and ammonium sulfate, which is previously activated.  The mixture between the two agents is 40-60%, 60-40%, or 90-10%, depending on local worldwide standards.  The USGS uses a similar blend, called FOS Check G75F.

How does a Dry Chemical Powder fire Extinguisher work

   General Uses -    Dry chemical powder used on all classes of fire.  Prevents chain reaction by smuggling.  The pressure is generated by the gas cartridge stored inside the cylinder.  Its force will remain for 2 minutes and can reach 10 - 15 feet.

  Common combustible solids

   It melts Class A fire at around 350 - 400 degrees F. Class A fires are caused by the burning of common combustible materials, such as wood, paper, or most plastics.

  Burning liquids and gases

   The powder breaks the chain reaction of liquid and gas fire by coating the surface to which it is applied.

   These Class B in the American system;  Classes B and C in European and Australian systems) include the burning of gasoline, oil, propane, and natural gas.

  Electric fire

  It is safe and effective for electric fire because it is a non-conductor of electricity.  Wires connected to live electrical equipment (Class C in American systems; Class E in the Australian system) need to be outfitted with devices that will not return their energy to the user in case of water.  Electricity can also cause other classes of fire.

 Chimney bomb

  Chimney bombs are zip-lock bags or other small bags filled with ABC dry chemical powder.
   Chimney bombs are used by fire personnel to help extinguish chimney fires.  Creosote, which is a by-product of incomplete burning of wood (usually due to chronic combustion-air insufficiency), is extinguished by the chain reaction caused by chimney bombs.  The chimney bomb is first dropped directly down the chimney, where they explode when exposed to fire sediment and heat, releasing the powder.
   Then, the draft of the natural chimney will transport the dried chemical powder to the shaft of the chimney, thus coating the creosote and eventually neutralizing the fire.  Depending on how severe the fire is, the use of multiple chimney bombs may be necessary.
   Chimney bombs can also be effective if they are opened and then the chimney is lowered.  To make chimney bombs effective, it may be necessary to first open the chimney.

(DCP) Dry Chemical Powder Fire Extinguisher

Improper Uses of Dry Chemical Powder

  ABC dry chemical is improper for chlorine or oxidizer fires.  The resulting chemical reaction can cause the explosion or breakdown of chemicals releasing toxic gases.  On that time of case, water should be used.

  ABC Dry Chemical is unsuitable for certain metal fires (Class D) and does not have saponification characteristics and therefore should not be used on class fires.

 ABC dry chemical has been found to be effective initially to prevent the combustion of oils or fats, although reuse of excess dry chemical may be necessary due to the possibility of re-flashing of oils or fats near or at their flash point.
   The extinguisher of the A class is more effective in controlling fires that primarily involve vegetable oils because it causes chemical changes of oils or fats making re-flash less likely.  When a class extinguisher is not available, the ABC Dry Chemical Extinguisher can be used carefully to control cooking oil or fat if the operator has the potential need to reapply more of the oil or fat regime.  Be aware of  (Class K).

  Due to the corrosive properties of ABC dry chemistry, it is not recommended to be used around aircraft or sensitive equipment.

Subscribe to EngineeriSafety to learn more about Fire Engineering and Industrial Safety Management


Popular posts from this blog

(NRV) Non-Return Valves | Check Valves - Symbol, Types and Importance

(NRV) Non Return Valve
A Non- Return Valves, check valve, clack valve, non- return valves, reflux valve, retention valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in one direction only.
  Non - Return valve/ Check valve are two-port valves, meaning that they have two openings in the body, one to enter the fluid and the other to release the liquid.

Types of (NRV) Non - Return Valves There are various types of check valves/non-return valve used in a wide variety of applications.  Non- return valves are often part of common household items.  
Although they are available in a wide range of sizes and costs, Non - Return valve are generally very small, simple or inexpensive. Non - Return valve operate automatically and most are not controlled by an individual or any external control;  Accordingly, most have no valve handle or stem. The bodies (outer shells) of most  Non - Return valve/check valves are made of plastic or metal. Importance Conc…

Safety Slogans for Workplace that Avoid you from Accidents

Safety Slogans for Workplace that Avoid you from Accidents Here are the best collections of Safety Slogans for Workplace, that can avoid you from accidents.

Let's start reading list below mentioned of Safety Slogans in workplace, that can avoid you from accidents - Best listed Collections of Safety Slogans for Workplace  "A good safety culture is build over time it is never given"."Safety advisor is part of the team be sure he or she doesn't always mean"."If you give somebody and make sure there is a gloves on it"."If you are not safety conscious, you could end up unconscious, So Think About It"."If you are feeling beat because of the heat, do what you thought to and keep drinking water"."Pull in your hand when low beams are near, or your head could be forced into your rear"."Safety is the engine and you are the key that starts it"."Safety is this seam that joins the fabric of life. Don't let a loos…

Best Collections of Safety Slogans

Best Collections of Safety Slogans Here we are sharing few Best Collections of SafetySlogan, Safety Slogans in the Workplace.  Let's start reading list mentioned below.

List of Safety Slogans"Safety first safety always". - Charles M.Hays"Accidents are particularly Street and Highway accidents do not happen - they are causes". - Ernest Greenwood"Better a thousand times careful than once dead". - Proverb."Chance takers are accident makers"."For safety is not a gadget but a state of mind". - Eleanor Everest Freer"Hug your kids at home But belt them in the car". "Out of this nettle, danger, we pluck this flower, safety". - William_Shakespeare"Precautions is better than cure". - Edward_Coke"Prepare and prevent don't repair and repaent"."Safety doesn't happened by accident"."Safety is a cheap and effective insurance policy"."Safety means first aid to the uninjured&…