Hey there! As a supplier of fire tankers, I often get asked about the different types of fire - fighting foam used in our trucks. So, I thought I'd put together this blog to give you the lowdown on the various foam types we deal with.
1. Aqueous Film - Forming Foam (AFFF)
AFFF is one of the most commonly used fire - fighting foams in our fire tankers. It's super effective, especially when it comes to tackling flammable liquid fires, like those involving gasoline, diesel, and jet fuel.
How does it work? Well, when AFFF is applied to a fire, it forms a thin, aqueous film on the surface of the fuel. This film acts as a barrier, preventing the fuel from evaporating and cutting off the oxygen supply to the fire. It also has great spreading and sealing properties, which helps it quickly cover large areas of burning fuel.
One of the big advantages of AFFF is its fast - acting nature. It can extinguish a fire in a relatively short time, which is crucial in emergency situations. And it's pretty easy to use too. Our 25000L Foam Tank Fire Truck is often equipped with AFFF systems because of its high - capacity and the need to deal with large - scale flammable liquid fires.
However, AFFF does have some drawbacks. It contains per - and polyfluoroalkyl substances (PFAS), which have raised environmental and health concerns in recent years. These chemicals can persist in the environment for a long time and may have negative impacts on human health. So, while it's still widely used, there's a growing push to find more environmentally friendly alternatives.
2. Protein Foam
Protein foam has been around for a long time and is another popular choice for fire - fighting. It's made from hydrolyzed protein, usually derived from animal sources like hooves and horns.
Protein foam works by forming a thick, stable foam blanket over the burning fuel. This blanket smothers the fire by cutting off the oxygen supply and also helps to cool the fuel surface. It's particularly good at handling fires involving crude oil, heavy oils, and some types of solvents.
One of the key benefits of protein foam is its high heat resistance. It can withstand high temperatures for a relatively long time without breaking down, which makes it suitable for use in industrial settings where fires can burn very hot. Our 16000L Heavy Duty Water Tanker/foam Tanker Fire Truck is sometimes outfitted with protein foam systems for this very reason.
But protein foam also has its limitations. It doesn't spread as quickly as AFFF, so it may take a bit longer to cover a large fire area. And it can be more difficult to clean up after use compared to some other foams.
3. Fluoroprotein Foam
Fluoroprotein foam is a hybrid of AFFF and protein foam. It combines the best of both worlds, offering the fast - spreading properties of AFFF and the heat resistance of protein foam.
This foam is made by adding fluorochemical surfactants to protein foam. The fluorochemicals improve the foam's spreading and sealing capabilities, while the protein base provides the heat resistance. Fluoroprotein foam is great for fighting fires involving a wide range of flammable liquids, including those with a high flash point.
Our 8000L Middle Size Water Tanker/foam Tanker Fire Truck is often fitted with fluoroprotein foam systems because it offers a good balance of performance and flexibility for medium - sized fires.
But like AFFF, fluoroprotein foam also contains PFAS, so there are similar environmental and health concerns associated with its use.
4. Alcohol - Resistant Foam (AR Foam)
AR foam is specifically designed to fight fires involving polar solvents, such as alcohols, ketones, and esters. These types of fires can be particularly challenging because polar solvents can break down regular foams.
AR foam works by forming a polymer film on the surface of the burning liquid. This film acts as a barrier, protecting the foam from being destroyed by the polar solvent. It also helps to prevent the solvent from mixing with the water in the foam, which allows the foam to maintain its integrity and extinguish the fire.
AR foam is essential in industries where polar solvents are commonly used, like the chemical and pharmaceutical industries. Our fire tankers can be customized to carry AR foam systems to meet the specific needs of these clients.
However, AR foam is generally more expensive than other types of foam, and it may require special application equipment to ensure its effectiveness.
5. Compressed Air Foam System (CAFS) Foam
CAFS foam is a relatively new type of fire - fighting foam that's gaining popularity. It's created by mixing water, foam concentrate, and compressed air in a special system.
The advantage of CAFS foam is its high expansion ratio. It can produce a large volume of foam from a relatively small amount of water and foam concentrate. This makes it very efficient in terms of water usage, which is a big plus, especially in areas where water is scarce.
CAFS foam also has excellent penetration and cling properties. It can penetrate deep into burning materials, such as upholstery and bedding, and cling to vertical surfaces, making it effective for fighting fires in buildings.
Our fire tankers can be equipped with CAFS systems to provide this advanced fire - fighting capability. But setting up and maintaining a CAFS system can be more complex and costly compared to traditional foam systems.
Why Choose Our Fire Tankers?
We understand that choosing the right fire - fighting foam and fire tanker is crucial for your safety and the effectiveness of your fire - fighting operations. That's why we offer a wide range of fire tankers, each customizable to carry different types of fire - fighting foam.
Whether you need a high - capacity 25000L Foam Tank Fire Truck for large - scale industrial fires or a more versatile 8000L Middle Size Water Tanker/foam Tanker Fire Truck for general fire - fighting, we've got you covered. Our team of experts can help you select the right foam type and tanker configuration based on your specific needs.
If you're interested in learning more about our fire tankers and the fire - fighting foam options available, don't hesitate to reach out. We're here to answer all your questions and help you make the best decision for your fire - fighting requirements.
References
- NFPA 11: Standard for Low -, Medium -, and High - Expansion Foam
- NFPA 1150: Standard on Fluorine - Free Foam
- International Maritime Organization (IMO) Guidelines for the Use of Fire - Fighting Foams
