Which foam concentrate types are commonly used in ARFF operations?

Which foam concentrate types are commonly used in ARFF operations?

• A. Protein-only foams
• B. Class A foams
• C. Alcohol-resistant foams
• D. AFFF and fluoroprotein blends

Answer: (D)

ARFF foam concentrates are chosen to quickly blanket aviation-fuel fires and create a protective film that cools the fuel and keeps vapors from reigniting. AFFF concentrates spread rapidly across hydrocarbon fuels and form a separating film between fuel and air, aiding vapor suppression and knockdown. Fluoroprotein blends combine the stability and heat resistance of protein foams with fluorinated surfactants to improve flow, film formation, and burnback resistance on hydrocarbon fuels. Together, they cover the common aviation fuels encountered at airports and provide fast, reliable fire control. Protein-only foams are older and less versatile for modern fuels, Class A foams target ordinary combustibles, and alcohol-resistant foams are used when polar solvents are present—situations that are not the standard ARFF scenario. Hence, AFFF and fluoroprotein blends are the commonly used options in ARFF operations.

ARFF foam concentrates are chosen to quickly blanket aviation-fuel fires and create a protective film that cools the fuel and keeps vapors from reigniting. AFFF concentrates spread rapidly across hydrocarbon fuels and form a separating film between fuel and air, aiding vapor suppression and knockdown. Fluoroprotein blends combine the stability and heat resistance of protein foams with fluorinated surfactants to improve flow, film formation, and burnback resistance on hydrocarbon fuels. Together, they cover the common aviation fuels encountered at airports and provide fast, reliable fire control. Protein-only foams are older and less versatile for modern fuels, Class A foams target ordinary combustibles, and alcohol-resistant foams are used when polar solvents are present—situations that are not the standard ARFF scenario. Hence, AFFF and fluoroprotein blends are the commonly used options in ARFF operations.