Class A foam fire extinguishing agent mentioned herein is a newly-formulated integrated foam and wetting agent with outstanding fire-fighting adaptability and multiple practical advantages.

It effectively enhances water permeability and reduces surface tension. This agent can serve as test foam liquid for fire training demonstrations. Dilute one part foam concentrate with four parts water, then mix the diluted solution with water at a ratio of 3% or 6% to achieve the same expansion ratio as Aqueous Film Forming Foam (AFFF). Mixed with water at a concentration of 0.3%, it can extinguish and emulsify flowing fires caused by hydrocarbon compounds.

As a super-concentrated liquid, it can be blended with fresh water, brackish water or seawater at low proportions, featuring convenient application and cost efficiency. It can be prepared into AFFF by diluting one portion of the agent with four portions of water and further mixing with water at 3% or 6% proportion.

Its production cost and mixing ratio keep declining, greatly improving its applicability to large-scale Class A fire suppression. According to relevant foreign documents, compressed air foam systems were first adopted in Texas, the United States in the 1970s to put out shrub and wildland fires. This agent drastically cuts the consumption of raw foam liquid per fire operation and boasts an affordable price, making it ideal for large-scale deployment in fire departments. Since the early 1990s, it has been widely applied to urban building fire rescue abroad.

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The above content elaborates on the functions and characteristics of Class A foam fire extinguishing agent. More relevant knowledge will be updated in subsequent articles.