Overview
Foam concentrate is a critical firefighting agent designed to suppress and extinguish fires, especially flammable liquid fires (Class B) and, in some cases, Class A solid fires. When mixed with water and air through proportioning and discharge devices, foam concentrate forms firefighting foam that cools the fire, separates fuel from oxygen, and prevents re-ignition. It is widely used in industrial facilities, petrochemical plants, airports, marine applications, and fire brigades.
It is a specially formulated liquid chemical that, when proportioned with water at a specific ratio (such as 1%, 3%, or 6%), produces firefighting foam. The quality and performance of the foam depend heavily on the formulation of the concentrate and the accuracy of the mixing process.
Types of Foam Concentrates
AFFF (Aqueous Film Forming Foam)
Forms a thin aqueous film on the fuel surface
Fast fire knockdown and excellent sealing capability
Commonly used for hydrocarbon fires
AR-AFFF (Alcohol Resistant AFFF)
Designed for polar solvent and alcohol fires
Creates a protective polymer membrane
Suitable for chemical plants and fuel storage areas
Protein Foam
Made from natural protein sources
High heat resistance and long-lasting foam blanket
Slower knockdown compared to AFFF
Fluoroprotein Foam
Improved version of protein foam with fluorinated additives
Better flow and fuel resistance
Synthetic Foam
Suitable for both Class A and Class B fires
Good penetration and wetting properties
Key Functions of Foam Concentrate
Fire Suppression: Rapidly controls and extinguishes fires
Vapor Suppression: Seals the fuel surface to prevent vapor release
Cooling Effect: Lowers fuel and surface temperatures
Re-Ignition Prevention: Maintains a stable foam blanket
Foam Concentrate Proportioning
Foam concentrate must be accurately mixed with water using proportioning equipment such as:
Foam proportioners
Bladder tanks
Foam pumps
Balanced pressure systems
Incorrect proportioning can reduce foam effectiveness and compromise fire safety.
Applications
Oil refineries and petrochemical plants
Fuel storage tanks and terminals
Airports and aircraft hangars
Marine and offshore platforms
Fire trucks and mobile firefighting units
Conclusion
Foam concentrate is the foundation of any effective foam firefighting system. Selecting the correct type, ensuring proper proportioning, and maintaining the concentrate are essential for reliable fire protection. With the right foam concentrate, firefighting systems can deliver fast suppression, enhanced safety, and reduced fire damage across a wide range of applications.