Fire fighting foam types

What are the different fire extinguisher types? What types of fire should you use a fire extinguisher on? The surfactants used must produce foam in concentration of less than. FOAA fire fighting foam is simply a stable mass of small air-filled bubbles , which have a lower density than oil, gasoline or water.

Foam is made up of three ingredients - water, foam concentrate and air.

When mixed in the correct proportions, these three ingredients form a homogeneous foam blanket. When used as a fire barrier, air aspiration of the foam solution is critical. It cools the fire by coating the fuel. Coating the fuel prevents it from getting in contact with oxygen and this in the suppression of the combustion. A Russian chemist and engineer, Aleksandra Loran , invented fire fighting foam.

The chemicals used should produce foam that has less than concentration. Fomtec AFFF A is an aqueous film forming foam concentrate (AFFF) consisting of fluorocarbon and hydrocarbon surfactants blended with various solvents, preservatives and stabilisers. The foam forms an aqueous film that rapidly cuts off the oxygen supply and knocks down the fire.

The mechanism of extinguishment was, and is. See all full list on surreyfire. The more the fire line pressure, more foam it will inject.

Ship staff are not supposed to touch the proportioner. When the foam solution reaches foam nozzle on deck, the air is injected into the foam solution to create the fire fighting foam. Following is a list of mechanical foam concentrates that are the most common types currently used by fire fighters today. Aqueous Film Forming Foam (AFFF). Alcohol Resistant (AR-AFFF).

Synthetic – medium or high expansion types (detergent). The action of FoaBy excluding air (oxygen) from the fuel surface. Foam Equipment: Foam fire equipment is used to form the proper foam layer. Class A Foam Concentrate. The finished product, foam, floats on a fuel surface to extinguish a flammable liquid fire by separating the fuel from oxygen.

Navy was testing the Solberg foam, the Fire Fighting Foam Coalition attacked the notion that anything could compete with AFFF. The Fire Fighting Foam Coalition — with DuPont and the chemical company Dynax among its founding members — was soon making presentations to the EPA and various branches of the military. Aerial firefighting is the use of aircraft and other aerial resources to combat wildfires.

The types of aircraft used include fixed-wing aircraft and helicopters.

Smokejumpers and rappellers are also classified as aerial firefighters, delivered to the fire by parachute from a variety of fixed-wing aircraft, or rappelling from helicopters.