ICAO Levels B & C – a comparison of application rates

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As you may already know, the application rates for the new ICAO Levels B & C tests are different.*

For Level B the rate is 2.5L/min/m², compared with 1.75L/min/m² Level C - a reduction of 30%!

But how does this difference affect foams in use?

An article published in OTAC (Overseas Territories Aviation Circular) provided guidance on the amount of foam needed in use, directly comparing foams meeting both ICAO Level B and Level C – a summary of which can be seen below.

In summary and in line with the testing specifications, 30% less foam is required of a Level C foam compared with one that meets only Level B – a considerable saving!

Aberdeen Foam 3% AFFF-C6 Airport Foam meets ICAO Level C – so why choose anything else? For further information please click here or contact us.

 

 

Foam meeting ICAO Level B

Foam meeting ICAO Level C

 Size of Aircraft (metres)

Water (litres)

3% foam concentrate (litres)**

6% foam discharge (litres)**

Foam discharge (litres / minute)

Water (litres)

3% foam concentrate (litres)**

6% foam discharge (litres)**

Foam discharge (litres / minute)

 <9

230

14

28

230

160

8.5

19

160

 >9 - <12

670

40

80

550

460

27.5

55

360

 >12 - <18

1200

72

144

900

820

49

98

630

 >18 - <24

2400

144

288

1800

1700

102

204

1100

 >24 - <28

5400

324

648

3000

3900

234

468

2200

 >28 - <39

7900

474

948

4000

5800

348

696

2900

 >39 - <49

12100

726

1452

5300

8800

528

1056

3800

 >49 - <61

18200

1092

2184

7200

12800

768

1536

5100

 >61 - <76

24300

1458

2916

9000

17100

1026

2052

6300

 >76 - <90

32300

1938

3876

11200

22800

1368

2736

7900

* If you don’t already know, please see our news story here.

** Volume of foam concentrate is at required aerodrome availability of 200%

For a copy of the full OTAC article, please click here.