oSIST prEN 1568-3:2025
(Main)Fire extinguishing media - Foam concentrates - Part 3: Specification for low expansion foam concentrates for surface application to water-immiscible liquids
Fire extinguishing media - Foam concentrates - Part 3: Specification for low expansion foam concentrates for surface application to water-immiscible liquids
This document specifies requirements for chemical and physical properties, and minimum performance requirements of low expansion foams suitable for surface application to water-immiscible liquids. Requirements are also given for marking.
WARNING - Any type approval according to this document is invalidated by any change in composition of the approved product.
NOTE 1 Some concentrates conforming to this document can also conform to other parts of the EN 1568 series and therefore can also be suitable for application as medium and/or high expansion foams, and for application at low expansion to water-miscible liquids.
NOTE 2 For national deviations, see Annex T.
Feuerlöschmittel - Schaummittel - Teil 3: Anforderungen an Schaummittel zur Erzeugung von Schwerschaum zum Aufgeben auf mit Wasser nicht mischbaren Flüssigkeiten
Dieses Dokument legt Anforderungen an chemische und physikalische Eigenschaften und Mindestanforderungen an die Leistungsfähigkeit von Schwerschäumen fest, die für die Aufgabe auf mit Wasser nicht mischbare Flüssigkeiten geeignet sind. Anforderungen an die Kennzeichnung sind ebenfalls festgelegt.
WARNUNG — Jeder Typ-Prüfbescheid nach diesem Dokument wird bei Änderung der Zusammensetzung des geprüften Produktes ungültig.
ANMERKUNG 1 Einige diesem Dokument entsprechende Schaummittel können auch mit den anderen Teilen der Normenreihe EN 1568 übereinstimmen und deshalb auch für die Anwendung als Mittel- und/oder Leichtschäume sowie als Schwerschäume zur Anwendung bei wassermischbaren Flüssigkeiten geeignet sein.
ANMERKUNG 2 Für nationale Abweichungen siehe Anhang T.
Agents extincteurs - Émulseurs - Partie 3 : Spécifications pour les émulseurs à bas foisonnement destinés à une application à la surface de liquides n'ayant pas d'affinité pour l'eau
Le présent document spécifie les exigences en matière de propriétés chimiques, physiques et de performances minimales des émulseurs à bas foisonnement adaptées à une application à la surface des liquides n’ayant pas d’affinité pour l’eau. Des exigences concernant les marquages sont également fournies.
AVERTISSEMENT — Toute modification de la composition du produit approuvé annule toute homologation selon le présent document.
NOTE Il se peut que certains émulseurs conformes au présent document soient également conformes à d’autres parties de cette série de normes et qu’ils conviennent donc à une application comme émulseurs à moyen et/ou haut foisonnement, ainsi qu’à une application comme émulseurs à bas foisonnement pour des liquides ayant une affinité pour l’eau.
Gasila - Penila - 3. del: Specifikacija za penila za težko peno za površinsko uporabo pri tekočinah, netopnih v vodi
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Gasila - Penila - 3. del: Specifikacija za penila za težko peno za površinsko
uporabo pri tekočinah, netopnih v vodi
Fire extinguishing media - Foam concentrates - Part 3: Specification for low expansion
foam concentrates for surface application to water-immiscible liquids
Feuerlöschmittel - Schaummittel - Teil 3: Anforderungen an Schaummittel zur Erzeugung
von Schwerschaum zum Aufgeben auf mit Wasser nicht mischbaren Flüssigkeiten
Agents extincteurs - Émulseurs - Partie 3 : Spécifications pour les émulseurs à bas
foisonnement destinés à une application à la surface de liquides n'ayant pas d'affinité
pour l'eau
Ta slovenski standard je istoveten z: prEN 1568-3
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
prEN 1568-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2025
ICS 13.220.10
English Version
Fire extinguishing media - Foam concentrates - Part 3:
Specification for low expansion foam concentrates for
surface application to water-immiscible liquids
Agents extincteurs - Émulseurs - Partie 3 : Feuerlöschmittel - Schaummittel - Teil 3:
Spécifications pour les émulseurs à bas foisonnement Anforderungen an Schaummittel zur Erzeugung von
destinés à une application à la surface de liquides Schwerschaum zum Aufgeben auf mit Wasser nicht
n'ayant pas d'affinité pour l'eau mischbaren Flüssigkeiten
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 191.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1568-3:2025 E
worldwide for CEN national Members.
prEN 1568-3:2025 (E)
Contents Page
European foreword . 7
Introduction . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Sediment in the foam concentrate . 12
4.1 Sediment before ageing . 12
4.2 Sediment after ageing . 12
5 Freezing point. 12
6 Viscosity of the foam concentrate . 12
6.1 Test temperatures . 12
6.2 Newtonian foam concentrates . 12
6.3 Pseudo-plastic foam concentrates . 12
7 pH of the foam concentrate . 12
8 Surface tension of the foam solution . 13
9 Stability/separation test of foam concentrate . 13
10 Determination of expansion and drainage time . 13
10.1 Before temperature conditioning . 13
10.2 After temperature conditioning . 13
11 Test fire performance . 14
12 Occupational health and ecotoxicological information . 15
13 Annual foam quality check . 15
13.1 General . 15
13.2 Principles . 15
13.3 Types of analysis . 16
14 Expansion performance comparison test . 17
15 Technical information sheet . 17
16 Container marking . 17
Annex A (informative) Grades of foam concentrate and performance . 19
A.1 Grades. 19
A.2 Typical performance . 19
Annex B (normative) Sampling of foam concentrates . 21
Annex C (normative) Determination of percentage sediment . 22
C.1 Sampling . 22
C.2 Apparatus . 22
C.3 Procedure. 22
prEN 1568-3:2025 (E)
Annex D (normative) Freezing point determination . 23
D.1 General . 23
D.2 Apparatus . 23
D.3 Procedure . 23
D.4 Example of a temperature against time curve for evaluation . 24
Annex E (normative) Determination of Viscosity for pseudo-plastic foam concentrates . 25
E.1 Pseudo-plastic foam concentrates . 25
E.2 Viscosity determination . 25
E.2.1 Apparatus . 25
E.2.2 Viscosity measurement . 25
E.2.3 Results . 26
Annex F (normative) Temperature conditioning of foam concentrates . 27
F.1 General . 27
F.2 Low temperature conditioning . 27
F.2.1 Apparatus . 27
F.2.2 Procedure . 27
F.3 High temperature conditioning . 27
F.3.1 Apparatus . 27
F.3.2 Procedure . 27
F.4 Division into top and bottom half-samples . 28
F.4.1 Apparatus . 28
F.4.1.1 Top half-sample container(s) . 28
F.4.1.2 Divider device . 28
F.4.2 Procedure . 29
Annex G (normative) Determination of surface tension . 30
G.1 Solution of foam concentrate . 30
G.2 Procedure — Surface tension . 30
Annex H (normative) Stability/Separation test of foam concentrate . 31
H.1 General . 31
H.2 Apparatus . 31
H.3 Procedure . 31
Annex I (normative) Determination of expansion and drainage time . 32
I.1 Apparatus . 32
I.2 Temperature conditions . 32
I.3 Procedure . 32
I.4 Simulated fresh and sea water . 33
prEN 1568-3:2025 (E)
Annex J (normative) Determination of test fire performance . 38
J.1 General . 38
J.2 General conditions . 38
J.2.1 Test series and criteria for success . 38
J.2.1.1 Foam concentrates not compatible with sea water . 38
J.2.1.2 Foam concentrates compatible with sea water . 38
J.2.2 Temperatures and wind speed . 38
J.2.3 Records . 39
J.2.4 Foam solution . 39
J.2.5 Fuel . 40
J.3 Gentle application fire test . 40
J.3.1 Apparatus . 40
J.3.2 Test procedure . 41
J.4 Forceful application fire test . 42
J.4.1 Apparatus . 42
J.4.2 Procedure. 42
Annex K (normative) Occupational health and ecotoxicological testing . 44
Annex L (informative) Description of a radiation measurement method . 45
L.1 Evaluation . 45
L.2 General arrangement of test . 45
L.3 Technical data for radiometers . 46
L.4 Procedure. 47
Annex M (informative) Small-scale fire test . 49
M.1 Apparatus . 49
M.2 Test procedure . 50
M.2.1 Test conditions . 50
M.2.2 Set-up . 50
M.2.3 Fire test . 50
Annex N (informative) Annual foam quality check . 59
N.1 Visual examination . 59
N.1.1 Object of the test . 59
N.1.2 Test procedure . 59
N.2 Density . 59
N.2.1 Object of the test . 59
N.2.2 Test procedure . 59
N.3 pH-value . 59
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N.3.1 Object of the test . 59
N.3.2 Apparatus . 60
N.3.3 Test execution . 60
N.4 Sediment . 61
N.4.1 Object of the test . 61
N.4.2 Test procedure . 61
N.5 Viscosity . 61
N.5.1 Object of the test . 61
N.5.2 Test procedure . 61
N.6 Refractive index . 61
N.6.1 Object of the test . 61
N.6.2 Apparatus . 61
N.6.3 Test execution . 62
N.7 25 %-drainage time and expansion ratio . 62
N.7.1 Object of the test . 62
N.7.2 Test procedure . 62
N.8 Resistance to isopropanol . 62
N.8.1 Object of the test . 62
N.8.2 Test procedure . 62
N.8.3 Test requirements . 62
Annex O (normative) Determination of foam expansion sensitivity . 63
O.1 General . 63
O.2 General conditions . 63
O.2.1 Test series and evaluation . 63
O.2.2 Temperatures . 64
O.2.3 Records . 64
O.2.4 Foam solution. 64
O.2.5 Fuel . 64
O.3 Apparatus . 64
O.3.1 Circular fire tray . 64
O.3.2 Foam making equipment . 65
O.3.2.1 Supply of pressurised air . 65
O.3.2.2 Supply of foam solution . 65
O.3.2.3 Foam nozzle with mixing chamber . 65
O.4 Test procedure . 65
O.5 Test report . 65
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O.6 Figures . 66
Annex P (informative) Example for a technical information sheet . 74
Annex Q (informative) A-Deviations . 77
Bibliography . 79
prEN 1568-3:2025 (E)
European foreword
This document (prEN 1568-3:2025) has been prepared by Technical Committee CEN/TC 191 “Fixed
firefighting systems”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1568-3:2018.
This document includes the following significant technical changes with respect to EN 1568-3:2018:
— Determination of solid deposits for synthetic foams and protein foams clarified;
— Aqueous film formation evaluation removed;
— Optional annual foam quality check introduced;
— Temperature and wind speed measurements for performance fire test clarified;
— Stainless steel as optional material for small-scale fire test fire tray introduced;
— Foam expansion performance test introduced;
— Some test procedures clarified.
This document is Part 3 of EN 1568 which has the general title Fire extinguishing media — Foam
concentrates. The other parts are:
— Part 1: Specification for medium expansion foam concentrates for surface application to water-
immiscible liquids;
— Part 2: Specification for high expansion foam concentrates for surface application to water-immiscible
liquids;
— Part 4: Specification for low expansion foam concentrates for surface application to water-miscible
liquids.
This European Standard is one of a series of standards specifying requirements for fire extinguishing
media in common use. This series includes the following standards:
— EN ISO 5923, Equipment for fire protection and fire fighting — Fire extinguishing media — Carbon
dioxide);
— EN 27201-1, Fire protection — Fire extinguishing media — Halogenated hydrocarbons — Part 1:
Specifications for halon 1211 and halon 1301 (ISO 7201-1);
— EN 27201-2, Fire protection — Fire extinguishing media — Halogenated hydrocarbons — Part 2: Code
of practice for safe handling and transfer procedures (ISO 7201-2);
— EN 615, Fire protection — Fire extinguishing media — Specifications for powders (other than class D
powders).
prEN 1568-3:2025 (E)
Introduction
As fire fighting foams are chemical agents or chemical preparations, Commission Directive 2000/60/CE
and Regulations (EC) No 1272/2008 (CLP) and No 1907/2006 (REACH) apply and should be taken into
account.
Classes of fire are defined in EN 2 as follows:
— Class A: fires involving solid materials, usually of an organic nature, in which combustion normally
takes place with the formation of glowing embers;
— Class B: fires involving liquids or liquefiable solids;
— Class C: fires involving gases;
— Class D: fires involving metals;
— Class F: fires involving cooking media (vegetable or animal oils and fats) in cooking appliances.
Fire-fighting foams are widely used to control and extinguish Class B fires and to inhibit re-ignition. These
foams can also be used for prevention of ignition of flammable liquids and, in certain conditions, to
extinguish Class A fires.
Foams can be used in combination with other extinguishing media, particularly gaseous media and
powders, which are the subject of other European Standards (see European foreword).
These specifications have been designed to ensure that fire extinguishing media have the minimum useful
fire fighting capability. The user should ensure that the foam concentrates are used accurately at the
concentration recommended by the manufacturer. Fire performances indicated by this standard cannot
replicate practical fire situations.
Foam concentrates of different types and manufacture should not be mixed.
It should be noted that some combinations of extinguishing powder and foam can lead to unacceptable
loss of efficiency, caused by unfavourable interaction of the chosen media when applied simultaneously
or successively to the fire.
It is extremely important that the foam concentrate after dilution with water to the recommended
concentration should not in normal usage present a significant toxic hazard to life in relation to the
environment. The current version of Commission Directive 2000/60/CE,
Regulations (EC) No 1272/2008 (CLP) and No 1907/2006 (REACH) apply when considering the testing
of ecotoxicological properties and safety in the work environment.
A special quality characteristic is the type test conducted by an independent testing laboratory accredited
to EN ISO/IEC 17025.
prEN 1568-3:2025 (E)
1 Scope
This document specifies requirements for chemical and physical properties, and minimum performance
requirements of low expansion foams suitable for surface application to water-immiscible liquids.
Requirements are also given for marking.
WARNING — Any type approval according to this document is invalidated by any change in
composition of the approved product.
NOTE Some concentrates conforming to this document can also conform to other parts and therefore can also
be suitable for application as medium and/or high expansion foams, and for application at low expansion to water-
miscible liquids.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13565 (all parts), Fixed firefighting systems — Foam systems
EN ISO 2811-1, Paints and varnishes - Determination of density - Part 1: Pycnometer method (ISO 2811-1)
EN ISO 3104, Petroleum products - Transparent and opaque liquids - Determination of kinematic viscosity
and calculation of dynamic viscosity (ISO 3104)
EN ISO 3219-2:2021, Rheology - Part 2: General principles of rotational and oscillatory rheometry (ISO
3219-2:2021)
EN ISO 3675, Crude petroleum and liquid petroleum products - Laboratory determination of density -
Hydrometer method (ISO 3675)
EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696)
EN ISO 11348-2, Water quality - Determination of the inhibitory effect of water samples on the light
emission of Vibrio fischeri (Luminescent bacteria test) - Part 2: Method using liquid-dried bacteria (ISO
11348-2)
EN ISO 23753-1, Soil quality - Determination of dehydrogenases activity in soils - Part 1: Method using
triphenyltetrazolium chloride (TTC) (ISO 23753-1)
ISO 304, Surface active agents — Determination of surface tension by drawing up liquid films
ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
OECD 201, Test No. 201: Freshwater Alga and Cyanobacteria, Growth Inhibition Test
OECD 202, Test No. 202: Daphnia sp. Acute Immobilisation Test
OECD 203, Test No. 203: Fish, Acute Toxicity Test
OECD 301, Test No. 301: Ready Biodegradability
OECD 404, Test No. 404: Acute Dermal Irritation/Corrosion
prEN 1568-3:2025 (E)
OECD 405, Test No. 405: Acute Eye Irritation/Corrosion
OECD 420, Test No. 420: Acute Oral Toxicity - Fixed Dose Procedure
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/ ;
— ISO Online browsing platform: available at http://www.iso.org/obp .
3.1
25 %/50 % drainage time
time taken for 25 %/50 % of the volume of the original foam solution to drain out of the generated foam
3.2
expansion (E)
expansion value
expansion ratio
ratio of the volume of foam to the volume of the foam solution from which it was made
3.3
low expansion foam
foam which has an expansion ratio less than 20
3.4
medium expansion foam
foam which has an expansion ratio greater than or equal to 20 but less than 200
3.5
high expansion foam
foam which has an expansion ratio greater than or equal to 200
3.6
fire-fighting foam
aggregate of air filled bubbles formed from a foam solution used for fire-fighting
3.7
foam concentrate
liquid which is diluted with water to produce foam solution
Note 1 to entry: Annex A gives information on grades of foam concentrate.
3.8
foam solution
homogeneous mixture of foam concentrate and water in the proportions as specified by the foam
concentrate manufacturer
prEN 1568-3:2025 (E)
3.9
premix
foam solution prepared in a batch process by introducing a measured amount of foam concentrate into a
given amount of water in a storage
3.10
sediment
insoluble particles in the foam concentrate
3.11
Newtonian foam concentrate
foam concentrate which has a viscosity which is independent of the shear rate
3.12
pseudo-plastic foam concentrate
foam concentrate which has a viscosity which decreases with increasing shear rate
3.13
surface tension
tension within the interface between a liquid and air
3.14
freezing point
temperature at which the first ingredient of a mixture starts to solidify or freeze
3.15
designation
identifying name
name that corresponds to a chemical formulation and a specific production process
Note 1 to entry: It guarantees consistency of the characteristics, performance and conditions of use of the foam
concentrate.
3.16
demineralized water
−1
water conforming to EN ISO 3696 (Grade 3), or having a surface tension greater than 70 mN⋅m and a
−1
conductivity of ≤ 5μS⋅cm
Note 1 to entry: Surface tension tested in accordance with Clause G.2.
3.17
gentle application
application (of foam from the test nozzle) indirectly to the surface of the fuel via a backboard
Note 1 to entry: This definition of gentle application relates to the fire test procedures used in EN 1568–3 and
EN 1568–4. In practice fire-fighting systems foam can also be applied gently by fixed foam pourers or by indirect
application via a tank wall or other surface.
3.18
forceful application
application (of foam from the test nozzle) directly onto the surface of the fuel
prEN 1568-3:2025 (E)
3.19
qualified personnel
designated individual, suitably trained, competent through knowledge and practical experience and with
the necessary instruction to enable the tests and examinations to be carried out
4 Sediment in the foam concentrate
4.1 Sediment before ageing
Any sediment in the foam concentrate sampled in accordance with Annex B, but not aged in accordance
with Clause C.1, shall be dispersible through a 180 μm sieve, and the percentage volume of sediment shall
be not more than 0,25 % when tested in accordance with Annex C.
4.2 Sediment after ageing
Any sediment in the foam concentrate sampled in accordance with Annex B, and aged in accordance with
Clause C.1, shall be dispersible through a 180 μm sieve and the percentage volume of sediment shall be
not more than 1,0 % when tested in accordance with Annex C.
5 Freezing point
The freezing point of the foam concentrate sampled in accordance with Annex B shall be determined in
accordance with Annex D.
6 Viscosity of the foam concentrate
6.1 Test temperatures
The viscosity of the foam concentrate shall be measured from 20 °C, to and including the lowest
temperature for use claimed by the manufacturer in steps of 10 °C. Use a fresh sample for each
temperature.
6.2 Newtonian foam concentrates
The viscosity of the foam concentrate shall be determined in accordance with EN ISO 3104. If the viscosity
2 –1
is > 200 mm s , the container shall be marked in accordance with Clause 15 k).
6.3 Pseudo-plastic foam concentrates
The viscosity of the foam concentrate shall be determined in accordance with Annex E. If the viscosity at
−1
the lowest temperature for use is greater than or equal to 120 mPa·s at 375 s , the container shall be
marked in accordance with Clause 15 l).
7 pH of the foam concentrate
The pH of the foam concentrate sampled in accordance with Annex B shall be not less than 6,0 and not
more than 9,5 at (20 ± 1) °C.
prEN 1568-3:2025 (E)
8 Surface tension of the foam solution
The surface tension (determined in accordance with Clause G.2) of the foam solutions prepared using top
and bottom half-samples (see Clause F.4) of the foam concentrate sampled in accordance with Annex B
and conditioned in accordance with Annex F shall be not less than 0,95 times and not more than
1,05 times the surface tension of the foam solution prepared using the sampled foam concentrate.
9 Stability/separation test of foam concentrate
The foam concentrate shall not separate, stratify or precipitate as indicated by two or more distinct layers
when tested in accordance with Annex H.
The amount of solid deposits of the aged sample determined according to Annex C at 20 °C in synthetic
foams shall not increase from the fresh sample.
The amount of solid deposits of the aged sample determined according to Annex C at 20 °C in protein
foams shall not increase by more than 4 times the amount obtained from the fresh sample, and shall not
exceed a volume fraction of 1 % in total.
10 Determination of expansion and drainage time
10.1 Before temperature conditioning
The foam produced from the foam solution prepared from the foam concentrate sampled in accordance
with Annex B, at the supplier’s recommended concentration with simulated fresh water in accordance
with Clause I.4 shall be tested in accordance with Annex I and give an expansion according to 3.3. If
appropriate, a further sample for the same concentration made with the simulated sea water in
accordance with Clause I.4 shall also be tested.
10.2 After temperature conditioning
The foams produced from the solutions prepared with simulated fresh water by using top and bottom
half-samples (see Clause F.4) of foam concentrate, sampled in accordance with Annex B, at the supplier’s
recommended concentration, when tested in accordance with Annex I, shall have the following;
a) expansions which do not differ from each other or from the value obtained according to 10.1 using
simulated fresh water (i.e. before temperature conditioning) by more than 20 % of the value
obtained according to 10.1 using simulated fresh water; and
b) 25 % drainage times which do not differ from each other or from the value obtained according to
10.1 using simulated fresh water (i.e. before temperature conditioning) by more than 20 % of the
value obtained according to 10.1 using simulated fresh water.
If appropriate, the tests shall be repeated using top and bottom half-samples (see Clause F.4) of foam
concentrate, sampled in accordance with Annex B, at the supplier’s recommended concentration, using
foam solutions prepared with the simulated sea water in accordance with Clause I.4. These foam
solutions shall have the following:
c) expansions which do not differ from each other or from the value obtained according to 10.1 using
the simulated sea water (i.e. before temperature conditioning) by more than 20 % of the value
obtained according to 10.1 using the simulated sea water in accordance with Clause I.4; and
prEN 1568-3:2025 (E)
d) 25 % drainage times which do not differ from each other or from the value obtained according to
10.1 using the simulated sea water (i.e. before temperature conditioning) by more than 20 % of the
value obtained according to 10.1 using the simulated sea water in accordance with Clause I.4.
NOTE Expansion is dependent on the foam concentrate and the equipment used to make the foam.
11 Test fire performance
The foam produced from the foam solutions, prepared using the foam concentrate, sampled in accordance
with Annex B at the supplier's recommended concentration with simulated fresh water and if
appropriate at the same concentration with the simulated sea water in accordance with Clause I.4, shall
have an extinguishing performance class and burn-back resistance level as specified in Table 1 when
tested in accordance with Clause J.2 and Clause J.3 and/or Clause J.4 as appropriate.
NOTE 1 The values obtained with sea water can differ from those obtained with simulated fresh water.
NOTE 2 Annex M describes a small scale fire test which can be suitable for quality control purposes.
NOTE 3 The lack of homogeneity of the premix can influence the firefighting performance of the foam generated
from it.
Table 1 — Maximum extinction times and minimum burn-back times
Times in minutes.
Extinguishing Burn-back Gentle application test Forceful application test
performance resistance
class level
(see J.3) (see J.4)
Extinction 25 % burn- Extinction 25 % burn-
time not more back time not time not more back time not
than less than than less than
A 1,5 10
B 15 1,5
I+
C 10 1,5
D
...
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