EN 1568-1:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fire extinguishing media - Foam concentrates - Part 1: Specification for medium expansion foam concentrates for surface application to water-immiscible liquidsAgents extincteurs - Emulseurs - Partie 1: Spécifications pour les émulseurs moyen foisonnement destinés a une application a la surface de liquides n'ayant pas d'affinité pour l'eauFeuerlöschmittel - Schaummittel - Teil 1: Anforderungen an Schaummittel zur Erzeugung von Mittelschaum zum Aufgeben auf nicht-polare Flüssigkeiten13.220.10Gašenje požaraFire-fightingICS:SIST EN 1568-1:2008en,fr,deTa slovenski standard je istoveten z:EN 1568-1:200801-julij-2008SIST EN 1568-1:2008SLOVENSKI
STANDARDSIST EN 1568-1:20011DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1568-1March 2008ICS 13.220.10Supersedes EN 1568-1:2000
English VersionFire extinguishing media - Foam concentrates - Part 1:Specification for medium expansion foam concentrates forsurface application to water-immiscible liquidsAgents extincteurs - Emulseurs - Partie 1: Spécificationspour les émulseurs moyen foisonnement destinés à uneapplication à la surface de liquides n'ayant pas d'affinitépour l'eauFeuerlöschmittel - Schaummittel - Teil 1: Anforderungen anSchaummittel zur Erzeugung von Mittelschaum 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 1568-1:2008: E

Grades of foam concentrate.10 Annex B (normative)
Preliminary sampling of foam concentrates.11 Annex C (normative)
Determination of percentage sediment.12 Annex D (normative)
Determination of viscosity for pseudo-plastic foam concentrates.13 Annex E (normative)
Temperature conditioning of foam concentrates.15 Annex F (normative)
Determination of surface tension and spreading coefficient.18 Annex G (normative)
Determination of expansion and drainage time.19 Annex H (normative)
Determination of test fire performance.24 Annex I (informative)
Description of a radiation measurement method.28 Annex J (informative)
A-Deviations.32 Bibliography.34

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 1 of EN 1568 which has the general title "Fire extinguishing media - Foam concentrates". The other parts are:  Part 2: Specification for high expansion foam concentrates for surface application to water-immiscible liquids.  Part 3: Specification for low 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.

3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 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 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

NOTE The spreading coefficient indicates the possibility of film forming, but it does not measure its quality. 3.11 Newtonian foam concentrates foam concentrates which have a viscosity which is independent of the shear rate 3.12 pseudo-plastic foam concentrates foam concentrates which have a viscosity which decreases with increasing shear rate 3.13 surface tension tension within the interface between a liquid and air 3.14 interfacial tension tension within the interface between two immiscible liquids 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 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 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.

5.2 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. 8.2 After temperature conditioning The foam solution prepared using top and bottom half-samples, see E.4, of the foam concentrate, if it is claimed by the supplier to be "aqueous film-forming", sampled in accordance with Annex B and conditioned in accordance with Annex E, shall have a positive spreading coefficient over cyclohexane when tested in accordance with F.2.2. 9 Expansion and drainage of foam 9.1 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 potable water shall be

Grades of foam concentrate Foam concentrates are graded as follows: a) protein foam concentrates (P): these are liquids derived from hydrolysed protein materials; b) fluoroprotein foam concentrates (FP): these are protein concentrates with added fluorinated surface active agents; c) synthetic foam concentrates (S): these are based upon mixtures of hydrocarbon surface-active agents and can contain fluorinated surface-active agents with additional stabilisers; d) alcohol resistant foam concentrates (AR): these can be suitable for use on hydrocarbon fuels, and additionally are resistant to breakdown when applied to the surface of water-miscible liquid fuels. Some alcohol resistant foam concentrates can precipitate a polymeric membrane on the surface of alcohol; e) aqueous film-forming foam concentrates (AFFF): these are generally based on mixtures of hydrocarbon surfactants and fluorinated surface active agents and have the ability to form an aqueous film on the surface of some hydrocarbon fuels; f) film-forming fluoroprotein foam concentrates (FFFP): these are fluoroprotein foam concentrates which have the ability to form an aqueous film on the surface of some hydrocarbon fuels.

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 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 °C of the required temperature. D.2.2 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 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 600s-1;
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