1、BRITISH STANDARDBS EN 1568-2:2008Fire extinguishing media Foam concentrates Part 2: Specification for high expansion foam concentrates for surface application to water-immiscible liquidsICS 13.220.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g
2、59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporatingcorrigendum March 2010National forewordThis British Standard is the UK implementation of EN 1568-2:2008, incorporating corrigendum March 2010. It supersedes BS EN 1568-2:2000 which is with
3、drawn.The UK participation in its preparation was entrusted by Technical Committee FSH/18, Fixed fire fighting systems, to Subcommittee FSH/18/3, Foam concentrates.A list of organizations represented on this subcommittee can be obtained on request to its secretary.This publication does not purport t
4、o include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 1568-2:2008This British Standard was published under the authority of the Standards Policy and Strategy Commi
5、ttee on 31 March 2008 BSI 2010Amendments/corrigenda issued since publicationDate Comments 31 May 2010 Implementation of CEN corrigendum March 2010. Replacement of reference to Directive 2006/60/EEC with 2006/122/EC in the CEN foreword and introductionISBN 978 0 580 70845 9EUROPEAN STANDARDNORME EURO
6、PENNEEUROPISCHE NORMEN 1568-2March 2008ICS 13.220.10 Supersedes EN 1568-2:2000 English VersionFire extinguishing media - Foam concentrates - Part 2:Specification for high expansion foam concentrates for surfaceapplication to water-immiscible liquidsAgents extincteurs - Emulseurs - Partie 2: Spcifica
7、tionspour les mulseurs haut foisonnement destins uneapplication la surface de liquides nayant pas daffinitpour leauFeuerlschmittel - Schaummittel - Teil 2: Anforderungen anSchaummittel zur Erzeugung von Leichtschaum zumAufgeben auf nicht-polare (mit Wasser nicht mischbare)FlssigkeitenThis European S
8、tandard 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
9、 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 langua
10、ge 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, Luxemb
11、ourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights o
12、f exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1568-2:2008: EIncorporating corrigendum March 2010EN 1568-2:2008 (E) 2 Contents Page Foreword. 3 Introduction 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions. 5 4 Sediment in the foam co
13、ncentrate 6 5 Viscosity of the foam concentrate 7 6 pH of the foam concentrate . 7 7 Surface tension of the foam solution 7 8 Spreading coefficient of the foam solutions 7 9 Expansion and drainage of foam 7 10 Test fire performance . 8 11 Container marking 8 Annex A (informative) Grades of foam conc
14、entrates . 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
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 25 Annex I (informative) A-Deviations . 29 Bibliography . 31 BS EN 1568-2:2008EN 1568-2:
16、2008 (E) 3 Foreword This document (EN 1568-2:2008) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endo
17、rsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for
18、identifying any or all such patent rights. This document supersedes EN 1568-2:2000. This European Standard is one of a series specifying requirements for fire extinguishing media in common use. This series includes the following: EN 25923, Fire protection Fire extinguishing media Carbon dioxide (ISO
19、 5923:1989) EN 27201-1, Fire protection Fire extinguishing media Halogenated hydrocarbons 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 proce
20、dures (ISO 7201-2:1991) EN 615, Fire protection Fire extinguishing media Specification for powders (other than Class D powders) This standard is Part 2 of EN 1568 which has the general title “Fire extinguishing media Foam concentrates“. The other parts are: Part 1: Specification for medium expansion
21、 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
22、fighting foams are chemical agents or chemical preparations EC Directives 1967/548/EEC, 1999/45/EEC, Regulation (EC) 1907/2006 (REACH) and 2006/122/EC apply and should be taken into account. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun
23、tries 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, Spa
24、in, Sweden, Switzerland and the United Kingdom. BS EN 1568-2:2008EN 1568-2:2008 (E) 4 Introduction 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; Cl
25、ass 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
26、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
27、Standards (see 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 in
28、dicated by this standard cannot replicate practical fire situations. Foam concentrates of different types and manufacturers 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
29、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 curren
30、t versions of EC Directives 67/548/EEC, 2006/122/EC, 1999/45/EEC and Regulation (EC) 1907/2006 apply when considering the testing of ecotoxicological properties and safety in the work environment. BS EN 1568-2:2008EN 1568-2:2008 (E) 5 1 Scope This document specifies requirements for chemical and phy
31、sical properties, and minimum performance requirements of high expansion foams suitable for surface application to water-immiscible liquids. Requirements are also given for marking. NOTE Some concentrates conforming to this part of EN 1568 can also conforms to other parts and therefore can also be s
32、uitable for application as low and/or medium expansion foams. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document
33、(including any amendments) applies. EN ISO 3104, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity (ISO 3104:1994) EN ISO 3219, Plastics - Polymers/resins in the liquid state or as emulsions or dispersions - Determination of v
34、iscosity using a rotational viscometer with defined shear rate (ISO 3219:1993) EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987) ISO 304, Surface active agents Determination of surface tension by drawing up liquid films ISO 3310-1, Test sieves Technica
35、l requirements and testing Part 1: Test sieves of metal wire cloth 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
36、 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
37、than 200 3.5 high expansion foam foam which has an expansion ratio greater than or equal to 200 BS EN 1568-2:2008EN 1568-2:2008 (E) 6 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 p
38、roduce foam solution NOTE Annex A gives information on grades of foam concentrate. 3.8 foam solution solution of foam concentrate in water 3.9 sediment insoluble particles in the foam concentrate 3.10 spreading coefficient value which indicates the ability of one liquid to spread spontaneously acros
39、s the surface of another 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 concentr
40、ates 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 sed
41、iment in the foam concentrate sampled in accordance with Annex B, but not aged in accordance with C.1, shall be dispersible through a 180 m 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
42、 foam concentrate sampled in accordance with Annex B, and aged in accordance with C.1, shall be dispersible through a 180 m sieve and the percentage volume of sediment shall be not more than 1,0 % when tested in accordance with Annex C. BS EN 1568-2:2008EN 1568-2:2008 (E) 7 5 Viscosity of the foam c
43、oncentrate 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 s1, the container shall be marked in accordance with Clause 11 l). 5.2 Pseudo
44、-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 concen
45、trate 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
46、 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 solutio
47、ns 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
48、 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 th
49、e 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 suppliers recommended concentration with potable water shall be te
