EN 1568-3:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fire extinguishing media - Foam concentrates - Part 3: Specification for low expansion foam concentrates for surface application to water-immiscible liquidsAgents extincteurs - Emulseurs -
- Partie 3 : Spécifications pour les émulseurs bas foisonnement destinés a une application a la surface des liquides n'ayant pas d'affinité pour l'eauFeuerlöschmittel - Schaummittel - Teil 3: Anforderungen an Schaummittel zur Erzeugung von Schwerschaum zum Aufgeben auf nicht-polare Flüssigkeiten13.220.10Gašenje požaraFire-fightingICS:SIST EN 1568-3:2008en,fr,deTa slovenski standard je istoveten z:EN 1568-3:200801-julij-2008SIST EN 1568-3:2008SLOVENSKI
STANDARDSIST EN 1568-3:20011DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1568-3March 2008ICS 13.220.10Supersedes EN 1568-3:2000
English VersionFire extinguishing media - Foam concentrates - Part 3:Specification for low expansion foam concentrates for surfaceapplication to water-immiscible liquidsAgents extincteurs - Emulseurs - Partie 3: Spécificationspour les émulseurs bas foisonnement destinés à uneapplication à la surface de liquides n'ayant pas d'affinitépour l'eauFeuerlöschmittel - Schaummittel - Teil 3: Anforderungen anSchaummittel zur Erzeugung von Schwerschaum zumAufgeben auf nicht-polare (mit Wasser nicht mischbare)FlüssigkeitenThis European Standard was approved by CEN on 5 January 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1568-3:2008: E

Preliminary sampling of foam concentrates.12 Annex C (normative)
Determination of percentage sediment.13 Annex D (normative)
Determination of Viscosity for pseudo-plastic foam concentrates.14 Annex E (normative)
Temperature conditioning of foam concentrates.16 Annex F (normative)
Determination of surface tension and spreading coefficient.19 Annex G (normative)
Determination of expansion and drainage time.20 Annex H (normative)
Determination of test fire performance.25 Annex I (informative)
Small scale fire test.30 Annex J (informative)
Description of a radiation measurement method.40 Annex K (informative)
A-Deviations.44 Bibliography.46

Part 1: Specifications for halon 1211 and halon 1301 (ISO 7201-1:1989) EN 27201-2, Fire protection — Fire extinguishing media — Halogenated hydrocarbons — Part 2: Code of practice for safe handling and transfer procedures (ISO 7201-2:1991) EN 615, Fire protection — Fire extinguishing media — Specification for powders (other than Class D powders)
This standard 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 As fire fighting foams are chemical agents or chemical preparations EC Directives 1967/548/EEC, 1999/45/EEC, Regulation (EC) 1907/2006 (REACH) and 2006/60/EEC apply and should be taken into account. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

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

tension within the interface between a liquid and air 3.16 interfacial tension tension within the interface between two immiscible liquids

5 Viscosity of the foam concentrate 5.1 Newtonian foam concentrates The viscosity of the foam concentrate at the lowest temperature for use claimed by the manufacturer shall be determined in accordance with EN ISO 3104. If the viscosity is >200 mm2 s–1, the container shall be marked in accordance with Clause 11 l). 5.2 Pseudo-plastic foam concentrates The viscosity of the foam concentrate shall be determined in accordance with Annex D. If the viscosity at the lowest temperature for use is greater than or equal to 120 mPa.s at 375 s-1, the container shall be marked in accordance with Clause 11 m). 6 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. 7 Surface tension of the foam solution The surface tension (determined in accordance with F.2.1) of the foam solutions prepared using top and bottom half-samples (see E.4) of the foam concentrate sampled in accordance with Annex B and conditioned in accordance with Annex E 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. 8 Spreading coefficient of the foam solutions NOTE The spreading coefficient indicates the possibility of film-forming, but it does not measure its quality. Certain properties of film-forming foams are not defined are note defined by this standard. 8.1 Before temperature conditioning The foam solution prepared using the concentrate, if it is claimed by the supplier to be "aqueous film-forming", sampled in accordance with Annex B shall have a positive spreading coefficient over cyclohexane when tested in accordance with F.2.2.

Table 1 — Maximum extinction times and minimum burn-back times Times in minutes Extinguishing performance class Burn-back resistance level Gentle application test (See H.2) Forceful application test (See H.3)
Extinction time not more than Burn-back time not less than Extinction time not more than Burn-back time not less than
A not applicable 3 10 I B
15 3
C
10 3 Not
D
5 3 Applicable
A not applicable 4 10 II B
15 4
C
10 4 Not
D
5 4 Applicable
B 5 15
III C 5 10 Not
D 5 5 Applicable NOTE 1
There is no burn-back resistance level A for class III.
NOTE 2
Typical extinguishing performance classes and burn-back resistance levels for different types of foam concentrate are given in Annex A. 11 Container marking Markings on shipping containers should be permanent and legible. The following information shall be marked on the packaging or transport container: a) the designation (identifying name) of the concentrate; b) the words "low expansion fire-fighting foam concentrate" and the number and date of this European Standard (i.e. EN 1568-3:2008); NOTE For low expansion concentrates which also conform to other parts of EN 1568 additional markings can be used as given in those parts. c) if the concentrate conforms to Clause 8 the words "aqueous film-forming"; d) recommended usage concentration (most commonly 1 %, 3 % or 6 %); e) any tendency of the foam concentrate to cause harmful physiological effects, the methods needed to avoid them and the first aid treatment if they should occur; f) recommended maximum storage temperature and lowest temperature for use; g) if the concentrate does not conform to Clause 7, 8.2 and 9.2 after conditioning in accordance with E.2 the words 'Do not store below 0 °C'; h) the nominal quantity in the container;

I
C
Yes AFFF (AR)
I
A or B
Yes FFFP (not AR)
I
B
Yes FFFP (AR)
I
A or B
Yes FP (not AR)
II
A or B
No FP (AR)
II
A or B
No P (not AR)
III
B
No P (AR)
III
B
No S (not AR)
III
C
No S (AR)
III
C
No
Preliminary sampling of foam concentrates The samples for testing shall be delivered by the supplier in completely filled sealable containers. The samples for testing shall be taken and delivered by the supplier using a method which will provide a representative sample of the foam concentrate to be tested. NOTE Nominal 25-litre containers are convenient.

Determination of percentage sediment NOTE See Clause 4. C.1 Sampling Use a sample prepared in accordance with Annex B. Place approximately 1 l of the sample in a suitable container of nominal capacity sufficient to provide an ullage of 5 % to 10 % of the container volume. Seal the container. Ensure that any sediment is dispersed by agitating the sample container. Take two samples, testing one immediately at a temperature of (20 ± 5) °C, the other after ageing for (24 ± 2) h at (60 ± 2) °C in a completely filled container without access to air. C.2 Apparatus C.2.1 Graduated centrifuge tubes NOTE The centrifuge tubes described in ISO 3734 are suitable. C.2.2 Centrifuge, operating at (6 000 ± 600) m s-2. NOTE The centrifuge described in ISO 3734 is suitable. C.2.3 180 µµµµm sieve conforming to ISO 3310-1 C.2.4 Plastic wash bottle C.3 Procedure C.3.1 Centrifuge each sample of the concentrate for 10 min. Determine the volume of the sediment and report it as a percentage of the volume of the centrifuged sample. C.3.2 Wash the contents of the centrifuge tube onto the sieve and check whether the sediment can be dispersed through the sieve by the jet from the plastic wash bottle.

Determination of Viscosity for pseudo-plastic foam concentrates NOTE The procedure is described in EN ISO 3219 Part A or B. D.1 Pseudo-plastic foam concentrates Pseudo-plastic foam concentrates have a viscosity which decreases with increasing shear rate at constant temperature. NOTE Pseudo-plastic foam concentrates are a particular class of non-Newtonian foam concentrate. D.2 Viscosity determination D.2.1 Apparatus Rotational viscometer in accordance with EN ISO 3219 with the following parameters: Maximum shear stress ≥ 75 Pa Maximum shear rate ≥ 600 s-1 The viscometer shall be fitted with a temperature control unit which can maintain the sample temperature within ± 1 ºC of the required temperature. D.2.2 Test temperatures The viscosity of the foam concentrate shall be measured from 20 ºC, to and including the lowest temperature for use claimed by the manufacturer in steps of 10 ºC. Use a fresh sample for each temperature. D.2.3 Viscosity measurement If the sample contains suspended air bubbles the sample shall be centrifuged for 10 min using the apparatus specified in C.2.1 and C.2 before the sample is applied in the apparatus. The test should be performed according to the following test procedure:
1. adjustment of temperature control unit; 2. setting of the gap; 3. application of the sample; 4. minimum 10 min waiting period (no shear) to reach temperature equilibrium; 5. 1 min pre-shearing at 600 s-1; 6. 1 min waiting period without shearing;

Temperature conditioning of foam concentrates E.1 General If the foam concentrate is claimed by the supplier not to be adversely affected by storage at -30 ºC, condition the sample in accordance with E.2 and then in accordance with E.3; otherwise, condition only in accordance with E.3. E.2 Low temperature conditioning E.2.1 Apparatus E.2.1.1 Freezing chamber, capable of achieving a temperature of (-30 ± 3) ºC E.2.1.2 Sample containers, in accordance with Annex B. NOTE More than one container can be needed to condition sufficient volume of foam concentrate for subsequent testing. E.2.2 Procedure Set the temperature of the freezing chamber to (-30 ± 3) ºC. Do not agitate the content of the container(s) at any time until the sample of foam concentrate has been divided into top and bottom half-samples (see E.4). Place the sample container(s) in the freezing chamber and maintain at the required temperature for (24 ± 1) h. At the end of this period store the container(s) for not less than 48 h and not more than 72 h in an ambient temperature of (20 ± 5) ºC. Repeat 3 times so that there are four cycles of freezing and thawing before testing. E.3 High temperature conditioning E.3.1 Apparatus Oven, capable of achieving a temperature of (60 ± 3) ºC. E.3.2 Procedure Set the temperature of the oven to (60 ± 3) ºC. If the foam concentrate sample has not been conditioned in accordance with E.2 use foam concentrate sample in accordance with Annex B; otherwise use containers conditioned in accordance with E.2. Do not agitate the content of the container(s) at any time until the sample of foam concentrate has been divided into top and bottom half-samples (see E.4).

Top half-sample container(s) Sealable empty container(s), suitable for the foam concentrate to be tested, of minimum half the volume of the sample container(s) as described in Annex B. E.4.1.2
Divider device After conditioning, the top sample from the sample container shall be divided from the bottom sample by pressurizing the sample container and force the top sample through a delivery pipe into the top sample container described in E.4.1.1. A principle sketch of the divider and sample container is shown in Figure E.1 The delivery pipe and the pressure inlet can be fitted to the lid of the original sample container. In practice it might be necessary to use different fitti
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