Class B

[aarondsouza]

What is the difference between a Class B CO2 fire extinguisher and a Class C CO2 fire extinguisher? One of my clients has a class b fire extinguisher for his server room. should i tell him to replace it?

[Ricardo]

aarondsouza, hope this is of some use to you

Fires are grouped in to five different classes.

Class A fire -  is for flammable solids, like wood, waste paper and fabrics and some plastics.
Class B fire -  is for liquids, like solvents, petrol kerosene, and some oils.
Class C fire - is for flammable gases, like butane, propane and natural gas.
Class D fire - is for metals such as aluminium, magnesium, titanium
Class F fire -  is a special class of fire specifically for oil in deep fat fryers.

Note: For Class C and D fires, specialist advice should be sought.


Portable CO2 as you ask is particularly suitable for dealing with small fires involving electrical equipment, and can also be used on Class B fires,remember once the source of the electricity is shut down, the electrical fire will revert to a different class.

For your server room the one to have on standby would be a CO2

[IrishFire]

aarondsouza, hope this is of some use to you

Fires are grouped in to five different classes.

Class A fire -  is for flammable solids, like wood, waste paper and fabrics and some plastics.
Class B fire -  is for liquids, like solvents, petrol kerosene, and some oils.
Class C fire - is for flammable gases, like butane, propane and natural gas.
Class D fire - is for metals such as aluminium, magnesium, titanium
Class F fire -  is a special class of fire specifically for oil in deep fat fryers.

Note: For Class C and D fires, specialist advice should be sought.


Portable CO2 as you ask is particularly suitable for dealing with small fires involving electrical equipment, and can also be used on Class B fires,remember once the source of the electricity is shut down, the electrical fire will revert to a different class.

For your server room the one to have on standby would be a CO2

Class D is this not Monnex?

[kurnal]

In the old days there were powders (TEC- Ternary Eutectic Chloride) specially designed for class D fires involving the reactive metals- the powder fused and formed a crust over the burning metal. More modern and cheaper class D extinguishers often use sodium chloride based powder which is applied via s special nozzle to slow the velocity and apply it gently over the burning surface. But the principle is the same- the salt crystals fuse and crust over the burning surfaces.
Monnex was another powder based on potassium salts.

[AnthonyB]

aarondsouza, hope this is of some use to you

Fires are grouped in to five different classes.

Class A fire -  is for flammable solids, like wood, waste paper and fabrics and some plastics.
Class B fire -  is for liquids, like solvents, petrol kerosene, and some oils.
Class C fire - is for flammable gases, like butane, propane and natural gas.
Class D fire - is for metals such as aluminium, magnesium, titanium
Class F fire -  is a special class of fire specifically for oil in deep fat fryers.

Note: For Class C and D fires, specialist advice should be sought.


Portable CO2 as you ask is particularly suitable for dealing with small fires involving electrical equipment, and can also be used on Class B fires,remember once the source of the electricity is shut down, the electrical fire will revert to a different class.

For your server room the one to have on standby would be a CO2

Class D is this not Monnex?

No - Monnex is a potassium bicarbonate/urea complex BC powder compound designed for rapid knockdown of Class B fires, as well as the potassium ion having a greater affinty for free radicals than sodium (as used in normal BC powder) Monnex decrepitates in the flame area to give a larger surface area & again rapid extinction

As stated Class D fires are tackled by compounds of either graphite, sodium chloride, or copper (or TEC if you really want,its still made in India but is morelikely to kill you than the fire!)

CO2 extinguishers are only Class B rated in the EU as there is no fire class for electrical fires anymore - but if in the US or a country following US codes it would be a BC extinguisher as they define class C as energized electrical equipment fires, not gases