Fire safety - check with a Fire Authority.
Also, the types of extinguishers and their chemicals vary from country to country, maybe even state to state.
Are you talking about general flammables, or flammables in the presence of electricity, for example?
Big differerence: the wrong extinguisher may kill you.
Powder
Burning liquids such as gasoline, kerosene, paint, acetone, and so on.
There is no liquid powder extinguisher on the market.
A CO2 fire extinguisher will work on flammable liquid and electrical fires only. If used on any other type of fire they will just give it more oxygen and it will spread.
Burning liquid fires require a U.L. Class B fire extinguisher, or ABC, or BC.
red = water and is used for wood paper textiles and solid material fires. DO not use on liquid elictrical or metal fires. blue = powder and is used for liquid and electrical fires. DO not use on metal fires. yellow = foam and is used for liquid fires. DO not use on electrical or metal fires black = carbon dioxide (CO) and is used for liquid and electrical fires DO not use on metal fires. halon can be used on all fires as well as dry chemical
Since petroleum is a flammable liquid, a Class B fire extinguisher would be used.
Use a foam extinguisher to smother the fire without spreading it.
Class B extinguishers fight Flammable Liquid fires. The extinguisher classes: Class A: flammable solids Class B: flammable liquids Class C: fires involving electrical equipment. These agents don't conduct electricity. No extinguisher is rated as only for Class C fires; you will find Class B-C and Class A-B-C extinguishers. Class D: flammable metals Class K: kitchen fires
Approximately ten square feet of surface of a Class B flammable liquid fire.
Class B extinguishers are used for liquid fires, typically gasoline and oil fires. Extinguishers rated ABC will be effective against all three classes, but seldom as effective as a dedicated Class B extinguisher.
liquid and electrical fires.
Class A fires are fires involving solid flammable material like wood or paper. Class B fires are flammable chemicals such as gasoline or alcohol. Class C fires are electrical in origin. The numbers on each category describes how effective this fire extinguisher is for each type of fire.