Guidelines apply to the foam concentrates used for fixed deck
foam fire-extinguishing systems required for tankers by SOLAS
regulations II-2/10.8 and chapter 14 of the International Code
for Fire Safety Systems (FSS Code), and chemical tankers as
specified by SOLAS regulation II-2/220.127.116.11.2 and the
International Code for the Construction and Equipment of Ships
Carrying Dangerous Chemicals in Bulk (IBC Code). These
Guidelines also apply to foam concentrates for fixed foam
fire-extinguishing systems in machinery spaces according to
chapter 6 of the FSS Code and to portable foam applicators
according to chapter 4 of the FSS Code. These Guidelines do not
apply to the foam generating equipment, only the foam
For the purpose
of these Guidelines, the following definitions apply:
1.2.1Foam (fire fighting) is an aggregate of air filled
bubbles formed from an aqueous solution of suitable foam
1.2.2 Foam solution is a solution of
foam concentrate and water.
1.2.3Foam concentrate is a liquid which, when mixed with
water in the appropriate concentration, gives a foam
1.2.4Expansion ratio is the ratio of the volume of foam to
the volume of foam solution from which it was made.
1.2.5Spreading coefficient is a measurement of the ability
of one liquid to spontaneously spread across another.
1.2.625% (50%) drainage time is the time for 25% (50%) of
the liquid content of a foam to drain out.
1.2.7Gentle application is the application of foam to the
surface of a liquid fuel via a backboard, tank wall or
1.2.8Sediment is insoluble particles in the foam
1.2.9Aqueous film-forming foam concentrate (AFF) is a foam
concentrate based on a mixture of hydrocarbon and fluorinated
surface active agents.
1.2.10Alcohol–resistant foam concentrate (AR) is a foam
concentrate that is resistant to breakdown when applied to the
surface of alcohol or other polar solvents.
1.2.11Film-forming fluoroprotein foam concentrate (FFFP) is a
foam concentrate which has the ability to form an aqueous film
on the surface of some hydrocarbons.
1.2.12 Fluoroprotein foam concentrate
(FP) is a protein foam concentrate with added
fluorinated surface active agents.
1.2.13 Protein foam concentrate (P) is
a foam concentrate made from hydrolyzed protein materials.
1.2.14Synthetic foam concentrate (S) is a foam concentrate
based on a mixture of hydrocarbon surface active agents and
which may contain fluorocarbons with additional stabilizers.
1.2.15 Type A foam concentrates are
alcohol-resistant or multi-purpose foam concentrates.
1.2.16Type B foam concentrates are all regular type foam
concentrates that are not alcohol-resistant, including
fluoroprotein and aqueous film-forming (AFF) foam