©Copyright Task Force Tips LLC 2003 - 2018
LIZ-030 March 8, 2018 Rev12
10
4.2.1 CLASS A FOAM
It is recommend that the Class A foam used meets USDA Forest Service 5100-307A “Specifi cation for Fire Suppressant Foam for
Wildland Firefi ghting (Class A Foam)”, NFPA 298 “Fire Fighting Foam Chemicals for Class A Fuels in Rural, Suburban, and Vegetated
Areas”, or NFPA 1150 “Foam Chemicals for Fires in Class A Fuels”.
SOLID FUEL - CLASS A
CLASS A FOAM
MOP UP & OVERHAUL
OPERATIONS
WILDLAND &
EXPOSURE PROTECTION
Apply as needed for penetration, isolation,
cooling, and smothering.
Apply with low expansion nozzle for:
straight stream nozzle
- soaking and penetration of fuel
low expansion nozzle
- greater stream reach
piercing nozzle
Apply with medium expansion nozzle for:
medium expansion nozzle
- greater coverage
- longer lasting
- insulating
4.2.2 CLASS B FOAM
LIQUID FUEL - CLASS B
HYDROCARBONS
Fuels that are mostly distilled from crude oil or
vegetable matter. Will not mix with water.
POLAR SOLVENTS
A fl ammable liquid that mixes with water.
Examples are alcohol’s, amines, ethers, esters,
aldehydes, and ketones. In fi refi ghting, any
fl ammable liquid which destroys regular foam is
generally referred to as a polar solvent.
AFFF (Aqueous Film Forming Foam)
AR (Alcohol Resistant Foam)
AR (Alcohol Resistant Foam)
UNIGNITED
UNIGNITED
May apply at less than rates for
ignited. Be capable of increasing
to ignited rates if needed.
Application rates:
Use foam manufacturer’s
recommendations for
handheld nozzles.
Apply with
MEDIUM EXPANSION NOZZLE
for vapor suppression
Apply with
MEDIUM EXPANSION NOZZLE
for vapor suppression
