Fire Extinguishers

Aircraft fuel is often composed mainly of kerosene, making it a class B fire. Because of the volume and spread of such fires, a compressed-air foam system is often used to create a layer of foam that smothers the fire.

you should shake them to make sure that the dry powder doesn´t settle to much after awile, the powder could getting hard after years, so shake them regularly, every 1-3 months... you can al so turn them upside down and back a few times, will work better...

In the US, fire extinguishers are listed under NFPA 10, which specifies annual maintenance.

Yes?

Multi-purpose fire extinguishers, like ABC, are typically dry chemical.

Thomas J Martin had an 1872 patent for a "Fire Extinguisher." He didn't invent the portable fire extinguisher; it had been around for over 100 years before he made his contribution to fire sprinklers. His motivation is not known.

There are trade-offs with hose reels and portable extinguishers.

One advantage of a hose reel is that it has a bigger supply of water than any portable extinguisher, assuming it has been properly maintained.

More water means a person can extinguish a larger amount of fire, all things being equal (type of fire, amount of fuel, location, etc).

However, hose reels require more training than an extinguisher, cannot be moved beyond a limited space, cannot be used on all types of fires, and can cause massive amounts of damage if used improperly (flooding, water damage, broken windows, etc).

There are six classes of fires to define the type of fire, and most importantly, the type of fire extinguisher to use to put out the fire. Here are the fire classes and the types of extinguishers you should use:

Class A - Solids (wood, paper, plastic) require water, foam, dry powder, and wet chemical extinguishers.

Class B - Flammable liquids (fuel, oil, paraffin) require foam, dry powder, and CO2 gas extinguishers.

Class C - Flammable gasses (propane, methane, butane) require dry powder extinguishers.

Class D - Burning metals (aluminum, magnesium, titanium) require dry powder (M28/L2) extinguishers.

Class E - Electrical items require dry powder or CO2 gas extinguishers.

Class F - Cooking oils and fats require wet chemical extinguishers.

Class D

There are two kinds of fire extinguisher powders.

The first is monoammonium phosphate, which you find in A-B-C dry chemical extinguishers. To make it, add phosphoric acid to ammonia water until the mixture turns acidic, and the monoammonium phosphate will crystallize out of solution.

In B-C fire extinguishers you will find sodium bicarbonate. This is baking soda, and you can get that at any grocery store.

1999

Depends upon what you mean "legal". They are legal for some things and not for others, i.e., they may violate fire codes if improperly installed or used in a wrong location.

Savannah, Ga, in Charlton Lane. You're welcome. Hondo

There is no chemical reaction involved. The CO2 simply acts like a heavy blanket, pushing the air from around the fire away. A more complex physical reaction happens as the CO2 is discharged: the sudden drop in pressure as the liquified CO2 expands results in a rapid drop in temperature, producing pellets of dry ice (solid carbon dioxide). The cloud you see when a CO2 extinguisher is activated is mostly water vapor condensed from the atmosphere by the cold gas.

we use a fire extinguisher ,fire blanket ,sand

51 to 56

B

that it has been tested to the NFPA 10/UL 711 standard and that it has passed the class A, B and C test requirements to be listed as such.

The one labelled "A"

Have it recharged by a service company

The B determines the type of fire that can be extinguished, and in this case it would be flammable liquids such as gasoline, grease, oil, diesel fuel, and kerosene.

The number indicates the approximate number of square feet the unit can extinguish, so a B-1 would be a relatively small extinguisher.

NFPA 1 (National Fire Code) requires that fire extinguishers be inspected every 30 days or less and maintained no less than yearly.

The annual maintenance, if any, depends upon the type of extinguisher and the conditions under which it is kept, among other things.