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1、BRITISH STANDARD BS EN 1568-2:2008 Fire extinguishing media Foam concentrates Part 2: Specification for high expansion foam concentrates for surface application to water-immiscible liquids ICS 13.220.10 ? Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled C
2、opy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- BS EN 1568-2:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2008 BSI 2008 ISBN 978 0 580 54846 8 National foreword This British Standard i
3、s the UK implementation of EN 1568-2:2008. It supersedes BS EN 1568-2:2000 which is withdrawn. 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 co
4、mmittee can be obtained on request to its secretary. This publication does not purport to 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. Amendments/corrigenda iss
5、ued since publication DateComments Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1568-2 March 2008 ICS 13.220
6、.10Supersedes EN 1568-2:2000 English Version Fire extinguishing media - Foam concentrates - Part 2: Specification for high expansion foam concentrates for surface application to water-immiscible liquids Agents extincteurs - Emulseurs - Partie 2: Spcifications pour les mulseurs haut foisonnement dest
7、ins une application la surface de liquides nayant pas daffinit pour leau Feuerlschmittel - Schaummittel - Teil 2: Anforderungen an Schaummittel zur Erzeugung von Leichtschaum zum Aufgeben auf nicht-polare (mit Wasser nicht mischbare) Flssigkeiten This European Standard was approved by CEN on 5 Janua
8、ry 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 concerning such national standards may be obta
9、ined 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 own language and notified to the CEN Manage
10、ment 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, Lithuania, Luxembourg, Malta, Netherlands, Norw
11、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form
12、 and by any means reserved worldwide for CEN national Members. Ref. No. EN 1568-2:2008: E Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- EN 1568-2:2008 (E) 2 Conte
13、nts Page Foreword. 3 Introduction 4 1Scope 5 2Normative references . 5 3Terms and definitions. 5 4Sediment in the foam concentrate 6 5Viscosity of the foam concentrate 7 6pH of the foam concentrate . 7 7Surface tension of the foam solution 7 8Spreading coefficient of the foam solutions 7 9Expansion
14、and drainage of foam 7 10Test fire performance . 8 11Container marking 8 Annex A (informative) Grades of foam concentrates . 10 Annex B (normative) Preliminary sampling of foam concentrates. 11 Annex C (normative) Determination of percentage sediment . 12 Annex D (normative) Determination of viscosi
15、ty 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
16、of test fire performance 25 Annex I (informative) A-Deviations. 29 Bibliography . 31 BS EN 1568-2:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- ? EN 1568-2:2
17、008 (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 end
18、orsement, 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
19、 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 (IS
20、O 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 proc
21、edures (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 expansio
22、n 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 f
23、ire 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
24、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,
25、 Spain, Sweden, Switzerland and the United Kingdom. BS EN 1568-2:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- ? EN 1568-2:2008 (E) 4 Introduction Classes of
26、 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; Class B: fires involving liquids or liquefiable solids; Class C: fires involving gases; Class D: fires involvin
27、g 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 inhibit re-ignition. These foams can also be used for prevention of ignition of flammable liquids and, in cer
28、tain 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 Standards (see Foreword). These specifications have been designed to ensure that fire extinguishing media hav
29、e 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 indicated by this standard cannot replicate practical fire situations. Foam concentrates of different types and
30、 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 of the chosen media when applied simultaneously or successively to the fire. It is extremely important that t
31、he 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 current versions of EC Directives 67/548/EEC, 2006/60/EEC, 1999/45/EEC and Regulation (EC) 1907/2006 apply when con
32、sidering the testing of ecotoxicological properties and safety in the work environment. BS EN 1568-2:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- ? EN 1568-
33、2:2008 (E) 5 1 Scope This document specifies requirements for chemical and physical 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 thi
34、s part of EN 1568 can also conforms to other parts and therefore can also be suitable 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 a
35、pplies. For undated references, the 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/
36、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 for analytical laboratory use - Specification and test methods (ISO 3696:1987) ISO 304, Surface active agents Determination
37、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 purposes of this document, the following terms and definitions apply. 3.1 25 %/50 % drainage time time taken for 25 %/50 %
38、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 expansio
39、n 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 EN 1568-2:2008 Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for R
40、esaleNo reproduction or networking permitted without license from IHS -,-,- ? EN 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 produce foam solution NOTE Annex A g
41、ives 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 across the surface of another NOTE The s
42、preading 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 d
43、ecreases 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 sampl
44、ed 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 foam concentrate sampled in accord
45、ance 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 1568-2:2008 Copyright British Standards Institution Provided by IHS under license with BSI -
46、 Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS -,-,- ? EN 1568-2:2008 (E) 7 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
47、 be determined in accordance with EN ISO 3104. If the viscosity is 200 mm2s1, 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 tempe
48、rature 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