1、BRITISH STANDARDBS EN 1568-3:2008Fire extinguishing media Foam concentrates Part 3: Specification for low expansion foam concentrates for surface application to water-immiscible liquidsICS 13.220.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g5
2、9g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporatingcorrigendum March 2010National forewordThis British Standard is the UK implementation of EN 1568-3:2008, incorporating corrigendum March 2010. It supersedes BS EN 1568-3:2000 which is withd
3、rawn.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
4、 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 1568-3:2008This British Standard was published under the authority of the Standards Policy and Strategy Commit
5、tee 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 70846 6EUROPEAN STANDARD NORME EURO
6、PENNE EUROPISCHE NORMEN 1568-3March 2008ICS 13.220.10 Supersedes EN 1568-3:2000 English VersionFire extinguishing media - Foam concentrates - Part 3: Specification for low expansion foam concentrates for surface application to water-immiscible liquidsAgents extincteurs - Emulseurs - Partie 3: Spcifi
7、cations pour les mulseurs bas foisonnement destins une application la surface de liquides nayant pas daffinit pour leauFeuerlschmittel - Schaummittel - Teil 3: Anforderungen an Schaummittel zur Erzeugung von Schwerschaum zum Aufgeben auf nicht-polare (mit Wasser nicht mischbare)FlssigkeitenThis Euro
8、pean 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 European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references con
9、cerning such national standards 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 translation under the responsibility of a CEN member into its o
10、wn language and notified to the CEN Management Centre has the same status as the official 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, Lithua
11、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CE
12、N All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN 1568-3:2008: EIncorporating corrigendum March 2010EN 1568-3:2008 (E) 2 Contents Page Foreword. 3 Introduction 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions. 5 4 Sediment
13、 in the foam concentrate 7 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 8 10 Test fire performance . 8 11 Container marking 9 Annex A (informative) Grad
14、es of foam concentrate and performance 11 Annex B (normative) 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
15、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 (informa
16、tive) Description of a radiation measurement method 40 Annex K (informative) A-Deviations 44 Bibliography . 46 BS EN 1568-3:2008EN 1568-3:2008 (E) 3 Foreword This document (EN 1568-3:2008) has been prepared by Technical Committee CEN/TC 191 “Fixed firefighting systems”, the secretariat of which is h
17、eld by BSI. This European Standard shall 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 possibi
18、lity 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 identifying any or all such patent rights. This document supersedes EN 1568-3:2000. This European Standard is one of the series specifying requirements for fire e
19、xtinguishing media in common use. This 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)
20、 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 15
21、68 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
22、 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 2006/122/EC apply
23、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,
24、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1568-3:2008EN 1568-3:2008 (E) 4 Introduction Classes of fire are defined in EN 2 as follows: Class A: f
25、ires 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
26、 (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. Fo
27、ams can be used in combination with other 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. T
28、he 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 n
29、oted 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 t
30、he recommended concentration should not in normal usage present a significant toxic hazard to life in relation to the environment. The current versions 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
31、and Safety in the work environment. BS EN 1568-3:2008EN 1568-3:2008 (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-immiscible liquids. Requirements are also
32、 given for marking. NOTE Some concentrates conforming to this part of EN 1568 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
33、 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 (including any amendments) applies. EN ISO 3104, Petroleum products Transparent and opaque liquids
34、 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 viscosity using a rotational viscometer with defined shear rate (ISO 3219:1993) EN ISO 3696, Water
35、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 Technical requirements and testing Part 1: Test sieves of metal wire cloth 3 Terms and definitions For the
36、 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
37、 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 BS E
38、N 1568-3:2008EN 1568-3:2008 (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 produce foam solution NOTE Annex A gives information on grades of foam concentrate. 3.8 foam solution
39、 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 backboard NOTE This definition of gentle application relates to the fire test procedures used in EN 1568 parts 3 and 4. In practice fire-fighting syst
40、ems foam can also be applied gently by fixed foam pourers or by indirect application via a tank wall or other surface. 3.10 forceful application application (of foam from the test nozzle) directly onto the surface of the fuel 3.11 sediment insoluble particles in the foam concentrate 3.12 spreading c
41、oefficient value which indicates the ability of one liquid to spread spontaneously across the surface of another NOTE The spreading coefficient indicates the possibility of film-forming, but it does not measure its quality. 3.13 Newtonian foam concentrates foam concentrates which have a viscosity wh
42、ich is independent of the shear rate 3.14 pseudo-plastic foam concentrates foam concentrates which have a viscosity which decreases with increasing shear rate 3.15 surface tension tension within the interface between a liquid and air 3.16 interfacial tension tension within the interface between two
43、immiscible liquids BS EN 1568-3:2008EN 1568-3:2008 (E) 7 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 m sieve, and the percentage volume o
44、f 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 m sieve and the percentage volume of sediment shall
45、be not more than 1,0 % when tested in accordance with Annex C. 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
46、is 200 mm2 s1, 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
47、, 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 acco
48、rdance 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
49、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 coeffi
