Foam and Foam Equipment

Question 1

Class A Foam

Answer 1

• Primarily for wildland fires
• Not compatible w/Class B
• Educted at 1/4% to 1%

*Do NOT use Class B Foam on Class A fires

Question 2

Class B Foam

Answer 2

AR-AFFF
Ansulite Lo-Viscosity AR-AFFF
Thunderstorm AR-AFFF
Hydrocarbon Fuels (gasoline, kerosene, diesel fuel)
Polar Solvents (ethanol, ethanol blends, methanol, and ketones)
- Educted at 3% and are compatible with each other

Question 3

3% Mil-Spec AFFF

Answer 3

Following Companies carry this in their foam tanks:

Engine 7/Engine 21 - built in foam proportioners and tanks

Station 16 and 56 - Aviation is a non-polar hydrocarbon fuel very similar to kerosene

Foam 37 and 371 - Tankers respond city wide, main purpose is to protect Navy Fuel Depot w/aviation fuel. Each Tanker carries 1800 gallons of foam concentrate

*Mil-Spec 3% AFFF IS NOT compatible w/AR-AFFF and should never be mixed. Never add AR-AFFF to any apparatus foam tank

Question 4

Engine Foam Quantity

Answer 4

Shall carry enough foam concentrate to convert the booster tank water into finished foam
15 - 18 gallons (3 - 4 pails)
(3 gallons per 100 gallons of tank capacity)

Question 5

Tanker Foam Quantity

Answer 5

Shall carry enough foam concentrate to convert 2500 gallon tank into finished foam
Minimum of 75 gallons (15 pails)
(3 gallons per 100 gallons of tank capacity)

Question 6

Standard Foam Delivery Equipment

Answer 6

• Foam eductor at 125 GPM; adjustable from 1/4% to 6%; used w/standard 1-3/4” handline
• Akron TurboJet Fog Nozzle set to 125 GPM
• Akron Foam Tube

Question 7

Guidlines for Foam use

Answer 7

• Set Foam eductor to match foam concentrate (ex. 3% setting for 3% concentrate)
• Max distance between eductor and nozzle:
  75 PSI nozzle - 250ft
  100 PSI nozzle - 150ft
  *Increase distance w/gated wye and 2-1/2” hose
• Nozzle GPM will match eductor GPM (125); bale must be fully open at all times
• Foam eductor requires inlet pressure of 200 PSI; nozzle pressure will not be lost due to FL within foam eductor

Question 8

Angus 240 GPM Eductor

Answer 8

• Use w/ 2-1/2” hose
• Carried by E1, E7, E11, E21, E30, E34, E37, E57
• Max inlet pressure is 120 PSI

Question 9

Akron 250 GPM Eductor

Answer 9

• Carried by E7, E21, and E31
• Use with Foam Tube, 2-1/2” hose, and 2-1/2” Akron TurboJet nozzle
• Allows 300ft between eductor and nozzle
• Requires 200 PSI inlet pressure

Question 10

AR-AFFF Specifications

Answer 10

• Compatible w/dry chemicals
• Cannot be used for subsurface injection
• Can be used w/fresh or salt water