EN 1568-4-2008 en Fire extinguishing media - Foam concentrates - Part 4 Specification for low expansion foam concentrates for surface application to water-miscible liquids (Incorpo.pdf

1、BRITISH STANDARDBS EN 1568-4:2008Fire extinguishing media Foam concentrates Part 4: Specification for low expansion foam concentrates for surface application to water-miscible liquidsICS 13.220.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g

2、38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporatingcorrigendum March 2010National forewordThis British Standard is the UK implementation of EN 1568-4:2008, incorporating corrigendum March 2010. It supersedes BS EN 1568-4:2000 which is withdra

3、wn.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 to i

4、nclude 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 1568-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committe

5、e 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 70847 3EUROPEAN STANDARDNORME EUROPEN

6、NEEUROPISCHE NORMEN 1568-4March 2008ICS 13.220.10 Supersedes EN 1568-4:2000 English VersionFire extinguishing media - Foam concentrates - Part 4:Specification for low expansion foam concentrates for surfaceapplication to water-miscible liquidsAgents extincteurs - Emulseurs - Partie 4: Spcificationsp

7、our les mulseurs bas foisonnement destins uneapplication la surface des liquides ayant une affinit pourleauFeuerlschmittel - Schaummittel - Teil 4: Anforderungen anSchaummittel zur Erzeugung von Schwerschaum zumAufgeben auf polare (mit Wasser mischbare) FlssigkeitenThis European Standard was approve

8、d 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 nationalstand

9、ards 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

10、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, Nether

11、lands, 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 of exploitation in a

12、ny form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1568-4:2008: EIncorporating corrigendum March 2010EN 1568-4:2008 (E) 2 Contents Page Foreword. 3 Introduction 5 1 Scope 6 2 Normative references . 6 3 Terms and definitions. 6 4 Sediment in the foam concentrate 8 5 Visco

13、sity of the foam concentrate 8 6 pH of the foam concentrate . 8 7 Surface tension of the foam solution 8 8 Spreading coefficient of the foam solutions 8 9 Expansion and drainage of foam 9 10 Test fire performance . 9 11 Container marking 10 Annex A (informative) Grades of foam concentrate . 12 Annex

14、 B (normative) Preliminary sampling of foam concentrates . 13 Annex C (normative) Determination of percentage sediment . 14 Annex D (normative) Determination of Viscosity for pseudo-plastic foam concentrates 15 Annex E (normative) Temperature conditioning of foam concentrates . 17 Annex F (normative

15、) Determination of surface tension and spreading coefficient 20 Annex G (normative) Determination of expansion and drainage time . 21 Annex H (normative) Determination of test fire performance 26 Annex I (informative) Small scale fire test . 30 Annex J (informative) Description of a radiation measur

16、ement method 40 Annex K (informative) A-Deviations . 44 Bibliography . 46 BS EN 1568-4:2008EN 1568-4:2008 (E) 3 Foreword This document (EN 1568-4:2008) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is held by BSI. This European Standard sh

17、all be given the status of a national standard, either by publication of an identical text or by endorsement, 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 thi

18、s document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1568-4:2000. This European Standard is one of the series specifying requirements for fire extinguishing media in common use. Thi

19、s series includes the following: EN 25923, Fire protection Fire extinguishing media Carbon dioxide (ISO 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 ext

20、inguishing 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 4 of EN 1568 which has the general title “Fire

21、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 3 Specific

22、ation for low expansion foam concentrates for surface application to water-immiscible 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 2006/122/EC apply and should be taken into account. Accord

23、ing 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

24、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1568-4:2008EN 1568-4:2008 (E) 4 Introduction Classes of fire are defined in EN 2 as follows: Class A: fires involving solid materials, usually

25、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

26、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 othe

27、r extinguishing media, particularly gaseous media and powders, which are the subject of other European 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 conc

28、entrates 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 extinguis

29、hing 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

30、in normal usage present a significant toxic hazard to life in relation to the environment. The current version of EC Directives 67/548/EEC, 2006/122/EC, 1999/45/EEC and Regulation (EC) 1907/2006 apply when considering the testing of ecotoxilogical properties and safety in the work environment. BS EN

31、 1568-4:2008EN 1568-4:2008 (E) 5 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-miscible liquids. Requirements are also given for marking. IMPORTANT In this part

32、of the document, the fire performance is tested using acetone and isopropanol as the fuel, which also forms the basis for the performance classification. However, there are a large number of water-miscible liquids, which have more or less different properties to acetone and isopropanol. It has been

33、shown by tests using other fuels that the performance of various foams can differ considerably. Examples of such fuel is Methyl Ethyl Ketone (MEK). It is therefore essential that the user checks for any unfavourable or unacceptable loss of efficiency when the foam is used against fires in any other

34、water-miscible fuels than acetone and isopropanol resepectively. The fire test conditions and procedure given in J.2 can be used in order to achieve results comparative with acetone and isopropanol resepectively and related requirements. It is also essential for the user to note, that other fuel dep

35、ths and methods of application than those specified in I.2, can cause considerable loss of efficiency and these matters should be carefully considered by the user when assessing the suitability for particular applications. NOTE Some concentrates conforming to this part of EN 1568 can also conforms t

36、o other parts and therefore can also be suitable for application as medium and/or high 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

37、latest edition of the referenced document (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 emu

38、lsions or dispersions - Determination of viscosity 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 liq

39、uid films ISO 3310-1, Test sieves Technical 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 s

40、olution to drain out of the generated foam BS EN 1568-4:2008EN 1568-4:2008 (E) 6 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 expans

41、ion 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 concentra

42、te liquid which is diluted with water to produce foam solution NOTE Annex A gives information on grades of foam concentrate. 3.8 foam solution solution of foam concentrate in water 3.9 gentle application application (of foam from the test nozzle) indirectly to the surface of the fuel from a backboar

43、d NOTE This definition of gentle application relates to the fire test procedures used in EN 1568-3 and 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. 3.10 sediment insoluble particles in the foam

44、 concentrate 3.11 spreading coefficient value which indicates the ability of one liquid to spread spontaneously across the surface of another 3.12 Newtonian foam concentrates foam concentrates which have a viscosity which is independent of the shear rate 3.13 pseudo-plastic foam concentrates foam co

45、ncentrates which have a viscosity which decreases with increasing shear rate 3.14 surface tension tension within the interface between a liquid and air BS EN 1568-4:2008EN 1568-4:2008 (E) 7 3.15 interfacial tension tension within the interface between two immiscible liquids 4 Sediment in the foam co

46、ncentrate 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 m sieve, and the percentage volume of sediment shall be not more than 0,25 % when tested in accordance with Annex C. 4

47、.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 m sieve and the percentage volume of sediment shall be not more than 1,0 % when tested in accordance with Annex C. 5 Viscosity of the

48、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 s1, container shall be marked in accordance with Clause 11 l). 5.2 Pse

49、udo-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, 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 ac