Can Foam Extinguishing Agents Directly Extinguish Electrical Fires?

Foam extinguishing agents actually contain a lot of water, such as 6% foam fire extinguishing agents. This 6% is under the action of the pressure ratio mixer, and the foam fire extinguishing agent extruded in the capsule is mixed with the water supply in a certain proportion to form a foam mixture. The foam mixture is then conveyed to the foam production unit where the fire is sprayed to extinguish. A 6% mixing ratio is mixed with 6:94 water, which is 94% water.

Water is known to conduct electricity. Actually, the composition of water is different. For example, there are almost no freely moving positive and negative ions in pure water, so they do not show conductivity and cannot conduct electricity; Various substances are dissolved in ordinary water and contain a large number of positive and negative ions, so they conduct electricity; To be precise, pure water is extremely weak and negligible. In any case, there is a more or less risk of conducting electricity.

Foam extinguishing agents with large water content cannot directly extinguish fires when they are charged because there may be a risk of electric shock. In addition, after the baptism of foam extinguishing agent, the live equipment may be discarded, which can also have a great impact. It can be used to extinguish Class A fires caused by the combustion of solid substances such as wood and cotton cloth; It is most suitable for extinguishing Class B fires, such as gasoline, diesel and other liquid fires; Water-soluble flammable flammable liquid fires (such as alcohols, esters, ethers, ketones, etc.) and Class E (charged) fires cannot be extinguished. However, some anti-soluble foam extinguishing agents are ideal for extinguishing water-soluble liquid fuel fires (ethanol, methanol, acetone, etc.).

Only by correctly understanding foam fire extinguishing agents and their uses can we give full play to their maximum advantages!