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Glossary

A

AFFF- AR or ARC

Alcohol Resistant or Alcohol Resistant Concentrates can be suitable for use on hydrocarbon combustibles. In addition, they are also decomposition-resistant when used on the surface of water-mixable (polar) combustibles. Some ARC materials form a polymer layer when used on the surface of the polar combustible.

AFFF or A3F

Aqueous Film Forming Foam – foam concentrates which form a film. Film formation means that a watery film formed by fluortensides floats on the flammable liquid and extinguishes it.

Alcohol-resistance

Polar combustibles such as alcohol or acetone destroy conventional foams, but can be safely extinguished with alcohol-resistant foam agents.

Application rate

Also designated as “extinguishing intensity”, this refers to the quantity of foam produced per unit of time and surface area.

ATC

Alcohol Type Concentrate – alcohol-resistant foam extinguishing agent.

B

Burnback resistance

Resistance of the foam to heat radiation and flame effect.

C

CAF

Compressed Air Foam

CAFS

Compressed Air Foam

Class A foam

Foam extinguishing agent especially developed for Fire Class A.

D

Direct application

Direct application of the foam to the combustible surface.

E

EN1568

Four-part European standard which specifies the requirements for heavy, medium and light foam, as well as for alcohol-resistant foam agents.

Ethanol

Alcohol which is mixed with gasoline as an additive.

Extinguishing agent classes

Classification of various foam extinguishing agents according to EN1568. A distinction is made between AFFF, ARC, FFFP, FP, FP ARC, P, P ARC, S and S ARC.

Extinguishing capacity

This is determined in standardized fire experiments (see EN1568 1-4), in order to make a statement with regard to extinguishing time, burnback resistance and extinguishing performance class.

Extinguishing foam

Special foam consisting of air, water and foam extinguishing agent.

Extinguishing performance class

The extinguishing performance class results from the extinguishing time achieved in an extinguishing test according to EN1568. In EN1568-3 (non-polar liquids), a distinction is made between extinguishing performance classes I, II and III; in EN1568-4 (polar liquids), a distinction is made between extinguishing performance classes I and II.

F

FFFP

Film Forming Fluor Protein Foam

Flowability

Refers to the flow behavior of the foam after application. Generally speaking, foams with a low foaming rate (heavy foams) flow better than foams with a higher foaming rate (medium/light foams).

Fluortensides

Chemicals in charge of film formation in foams.

Foam extinguishing agent

Also known as “foam agent”: a liquid which is diluted with water to form a foam agent solution.

Foaming

Also known as “foaming coefficient” or “foaming ratio”: the ratio of the foam volume to the volume of the foam agent solution, from which the foam was produced.

FP

Fluor Protein Foam

G

Glycols and glycol ethers

Commonly used in extinguishing agents in fire extinguishing foams.

H

Heavy foam

Foam with a foaming coefficient less than 20.

HI-EX

High Expansion Foam, foam with an expansion ratio higher than 200.

I

ICAO

International Civil Aviation Organization

Indirect application

Indirect application of the foam to the combustible surface by means of baffles would deflector plates.

J

K

L

Light foam

Foam with a foaming coefficient greater than 200.

LNG

Liquefied Natural Gas

M

Medium foam

Foam with a foaming coefficient between 20 and 200.

Mixability

Also referred to as “compatibility”. Generally speaking, ready-to-use foam extinguishing agents are compatible with each other. Mixing different foam concentrates can lead to problems. This affects both the mixing of foam agents for storage and the mixing of foam agents for use in mixers. We will be glad to advise you on questions involving the compatibility of various concentrates.

MTBE

A foam-destroying additive in unleaded gasoline.

N

Newtonian foam agent

A foam agent whose viscosity does not depend on the shear rate.

Non-polar liquid

A liquid which has a non-folder structure and cannot be mixed with water, for example: hydrocarbon compounds.

O

P

PBT

Persistent (not decomposable), Bioaccumulative, Toxic (poisonous)

PFOA

Perfluorooctanoic acid

PFOS

Perfluorooctane sulfonate as a salt of perfluorooctanoic acid

PFT

Perfluorinated tensides

Polar liquid

A liquid which has a folder structure and can be mixed with water, for example: alcohol and acetone.

Protein foam

Brown foam agent with a characteristic odor, based on hydrolyzed proteins.

Pseudoplastic foam agent

A foam agent whose viscosity decreases as the shear rate increases.

Q

R

S

S

A synthetic foam consisting of surface-active hydrocarbon tensides, which may contain fluorinated surface-active effective ingredients with additional stabilizers.

Setting point

The lowest temperature before the phase shift from liquid to solid, i.e. the lowest temperature at which the foam extinguishing agent is still in liquid form and can be mixed by mixers.

T

TBE

A foam-destroying additive in unleaded gasoline.

U

V

Viscosity

The resistance of the foam agent concentrate to shear forces; a description of its flow behavior.
.

W

Water halftime

The time at which half of the foam-water mixture has decomposed from the foam. This defines the water retaining capacity, and therefore the heat and burnback resistance, of extinguishing foams.

Wetting agent

Addition of a Class A or multi-area foam agent at a low concentration (0.1 – 1%) in order to reduce the surface tension of the water, thereby increasing both the cooling and the extinguishing effect.

X

Y

Z

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Our products carry the most rigorous approvals for safety & performance. Our products meet global standards such as the UL, EN, ICAO and Lastfire.

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