how does low expansion foam act as an extinguishing agent when dealing with oil fires?

Foam extinguishing agent is a commonly used extinguishing material in the field of fire fighting, which can be categorized into medium, high and low foam extinguishing agents according to the different foaming multiples. They have their own characteristics in the fire extinguishing process and are suitable for different types of fire.

First, medium times foam fire extinguishing agent is mainly used to fight the fire
Medium times foam fire extinguishing agent, its foaming times are usually between 21 and 200, the foam produced is fine and stable, easy to flow and has strong heat resistance. This type of fire extinguishing agent is mainly used to fight fires in limited space, such as underground coal mines, hangars, ships, warehouses, etc., as well as large oil fires. Medium times foam fire extinguishing agent can quickly cover the fire source, isolate the air, so as to achieve the effect of rapid fire extinguishing.

Second, high-foam fire extinguishing agent is mainly used to fight the fire
The foaming multiples of high-foam extinguishing agent are higher, and it can generate a large number of foams to cover the whole flame area quickly. Its main fire-fighting role is to reduce the burning speed through the foam cover and vaporization heat absorption, until the burning stops. High-foam extinguishing agent is especially suitable for fighting liquid fires (such as gasoline, kerosene, etc.) and solid fires (such as wood, paper, etc.), but also can be used to control liquefied petroleum gas, liquefied natural gas flow fire. In addition, high-foam also has good thermal insulation properties and the ability to prevent the spread of fire.

Third, the low-foam extinguishing agent is mainly used to put out the fire
Low-foam extinguishing agent is mainly used in the production, storage, transportation and use of class A, B and C liquids to fight fires, such as petrochemical companies, oil refineries, oil storage tanks, aircraft hangars and so on. This kind of fire extinguishing agent can quickly generate foam layer to cover the liquid surface, isolate the contact between air and liquid surface, so as to reduce the intensity of combustion and finally extinguish the fire. Low-foam extinguishing agent has a wide range of applicability and good extinguishing effect, is an important tool in the liquid fire fighting.

To summarize, medium, high and low foam extinguishing agents have their unique advantages and scope of application in fire fighting. Correct selection and use of different types of foam fire extinguishing agent to improve the efficiency of fire extinguishing and the protection of people’s lives and property safety is of great significance.