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1、BRITISH STANDARD BS ISO 7203-1:1995 Implementation of ISO 7203-1:1995 Fire extinguishing media Foam concentrates Part 1: Specification for low expansion foam concentrates for top application to water-immiscible liquids ICS 13.220.10 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT
2、+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 11-1998 The following
3、BSI references relate to the work on this standard: Committee reference FSH/18 Draft for comment 92/44864 DC ISBN 0 580 27048 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee FSH/18, Fixed fire fighting systems, upon whi
4、ch the following bodies were represented: AEA Technology Association of Building Engineers British Automatic Sprinklers Association British Fire Protection Systems Association British Fire Services Association Chartered Institution of Building Services Engineers Chemical Industries Association Chief
5、 and Assistant Chief Fire Officers Association Convention of Scottish Local Authorities Department of Health Department of the Environment (Building Research Establishment) Fire Brigades Union Fire Extinguishing Trades Association Health and Safety Executive HEVAC Association Home Office Institute o
6、f Fire Safety Institution of Fire Engineers London Fire and Civil Defence Authority Loss Prevention Council Ministry of Defence National Association of Fire Officers Royal Institute of British Architects Society of Motor Manufacturers and Traders Ltd. Warrington Fire Research Centre Amendments issue
7、d since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 BSI 11-1998i Contents Page Committees responsible Inside back cover National foreword ii Foreword iii Text of BS ISO 7203-1:1995 1 Li
8、censed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 ii BSI 11-1998 National foreword This British Standard reproduces verbatim ISO 7203-1:1995 and implements it as the UK national standard. This standard is published under the d
9、irection of the Consumer Products and Services Sector Board whose Technical Committee FSH/18 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; m
10、onitor related International and European developments and promulgate them in the UK. This British Standard will be withdrawn when Parts 1 to 4 of the European Standard EN 1568 are published. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Service
11、s, BSI, 389 Chiswick High Road, London W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligat
12、ions. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 20 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendme
13、nt table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 ii BSI 11-1998 Contents Page Fo
14、reword iii Introduction1 1Scope1 2Normative references1 3Definitions1 4Grades and uses of foam concentrates2 5Tolerance of the foam concentrate to freezing and thawing3 6Sediment in the foam concentrate3 7Comparative fluidity of the foam concentrate3 8pH of the foam concentrate3 9Surface tension of
15、the foam solution3 10Interfacial tension between the foam solution and cyclohexane3 11Spreading coefficient of the foam solution on cyclohexane4 12Expansion and drainage of foam4 13Test fire performance4 14Marking, packaging and specification sheet4 Annex A (normative) Preliminary sampling and condi
16、tioning of the foam concentrate6 Annex B (normative) Determination of tolerance to freezing and thawing (see clause 5)6 Annex C (normative) Determination of percentage of sediment (see clause 6)8 Annex D (normative) Determination of comparative fluidity (see clause 7)8 Annex E (normative) Determinat
17、ion of surface tension, interfacial tension and spreading coefficient (see clauses 9, 10 and 11)10 Annex F (normative) Determination of expansion and drainage time (see clause 12)10 Annex G (normative) Determination of test fire performance (see clause 13)14 Annex H (informative) Description of a ra
18、diation measurement method17 Annex J (informative) Compatibility20 Annex K (informative) Typical anticipated performance for various types of foam concentrate20 Figure B.1 Typical form of polyethylene tube7 Figure D.1 Apparatus for fluidity test9 Figure F.1 Collecting vessel for determination of exp
19、ansion and drainage time11 Figure F.2 Foam collector for expansion and drainage measurement12 Figure F.3 Foam-making nozzle12 Figure G.1 Test fire arrangement for gentle application16 Figure G.2 Test fire arrangement for forceful application17 Figure H.1 Location of radiometers for recording heat ra
20、diation during fire performance tests18 Figure H.2 Typical absolute radiation levels throughout a test19 Figure H.3 Typical relative radiation levels during extinction19 Figure H.4 Typical relative radiation levels during burnback20 Table 1 Maximum extinction times and minimum burnback times5 Licens
21、ed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 BSI 11-1998iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing I
22、nternational Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison
23、 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication a
24、s an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 7203-1 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 6, Extinguishing media for fire fighting. ISO 7203 con
25、sists of the following parts, under the general title Fire extinguishing media Foam concentrates: Part 1: Specification for low expansion foam concentrates for top application to water-immiscible liquids; Part 2: Specification for medium and high expansion foam concentrates for top application to wa
26、ter-immiscible liquids; Part 3: Specification for low expansion foam concentrates for top application to water-miscible liquids. Annexes A, B, C, D, E, F and G form an integral part of this part of ISO 7203. Annexes H, J and K are for information only. Licensed Copy: sheffieldun sheffieldun, na, Sun
27、 Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 BSI 11-19981 Introduction Firefighting foams are widely used to control and extinguish fires of flammabe
28、liquids and for inhibiting reignition. They may also be used to prevent ignition of flammable liquids and, in certain conditions, extinguish fires of solid combustibles. Foams may be used in combination with other extinguishing media, particularly halons, carbon dioxide and powders, which are the su
29、bject of other International Standards including those listed below: ISO 5923:1989, Fire protection Fire extinguishing media Carbon dioxide. ISO 6183:1990, Fire protection equipment Carbon dioxide extinguishing systems for use on premises Design and installation. ISO 7201-1:1989, Fire protection Fir
30、e extinguishing media Halogenated hydrocarbons Part 1: Specifications for halon 1211 and halon 1301. ISO 7201-2:1991, Fire extinguishing media Halogenated hydrocarbons Part 2: Code of practice for safe handling and transfer procedures of halon 1211 and halon 1301. ISO 7202:1987, Fire protection Fire
31、 extinguishing media Powder. A specification for foam systems designed in accordance with this part of ISO 7203 is being prepared and will be published as: ISO 7076:1), Fire protection equipment Automatic extinguishing systems for applying low, medium and high expansion foam. Attention is drawn to a
32、nnex J which deals with the compatibility of foam concentrates, and the compatibility of foams and powders. 1 Scope This part of ISO 7203 specifies the essential properties and performance of liquid foam concentrates used to make low expansion foams for the control, extinction and inhibition of reig
33、nition of fires of water-immiscible liquids. Minimum performance on certain test fires is specified. The foams are suitable for top application to fires of water-immiscible liquids. Those which will also comply with ISO 7203-3: Fire extinguishing media Foam concentrates Part 3: Specifications for lo
34、w expansion foam concentrates for top application to water-miscible liquids, which is being prepared, will also be suitable for top application to fires of water-miscible liquids. The foam concentrates might be suitable for use in non-aspirating sprayers or for subsurface application to liquid fires
35、, but requirements specific to those applications are not included in this part of ISO 7203. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 7203. At the time of publication, the editions indicated wer
36、e valid. All standards are subject to revision, and parties to agreements based on this part of ISO 7203 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Sta
37、ndards. ISO 304:1985, Surface active agents Determination of surface tension by drawing up liquid films. ISO 3310-1:1990, Test sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth. ISO 3696:1987, Water for analytical laboratory use Specification and test methods. ISO 373
38、4:1976, Crude petroleum and fuel oils Determination of water and sediment Centrifuge method. ISO 7203-2:1995, Fire extinguishing media Foam concentrates Part 2: Specification for medium and high expansion foam concentrates for top application to water-immiscible liquids. BS 5117:1989, Testing corros
39、ion inhibiting, engine coolant concentrate (antifreeze) Part 1: Methods of test for determination of physical and chemical properties Section 1.3: Determination of freezing point. 3 Definitions For the purposes of this part of ISO 7203, the following definitions apply. 3.1 characteristic values valu
40、es declared by the foam concentrate supplier for the chemical and physical properties and the performances of the foam and foam solution 3.2 25 % drainage time time for 25 % of the liquid content of a foam to drain out 1) To be published. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:
41、37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7203-1:1995 2 BSI 11-1998 3.3 50 % drainage time time for 50 % of the liquid content of a foam to drain out 3.4 expansion ratio of the volume of foam to the volume of the foam solution from which it was made 3.5 low expansion applied to foam with
42、expansion in the range 1 to 20, and to associated equipment, systems and concentrates 3.6 medium expansion applied to foam with expansion in the range 21 to 200 and to associated equipment, systems and concentrates 3.7 high expansion applied to foam with expansion greater than 201 and to associated
43、equipment, systems and concentrates 3.8 foam (firefighting) aggregate of air-filled bubbles formed from an aqueous solution of a suitable foam concentrate 3.9 (foam) concentrate liquid which, when mixed with water in the appropriate concentration, gives a foam solution 3.10 protein foam concentrate
44、(P) foam concentrate derived from hydrolized protein materials 3.11 fluoroprotein foam concentrate (FP) protein foam concentrate with added fluorinated surface active agents 3.12 synthetic foam concentrate (S) foam concentrate based on a mixture of hydrocarbon surface active agents and which may con
45、tain fluorocarbons with additional stabilizers 3.13 alcohol-resistant foam concentrate (AR) foam concentrate resistant to breakdown when applied to the surface of alcohol or other polar solvents 3.14 aqueous film-forming foam concentrate (AFFF) foam concentrate based on a mixture of hydrocarbon and
46、fluorinated surface active agents with the ability to form an aqueous film on the surface of some hydrocarbons 3.15 film-forming fluoroprotein foam concentrate (FFFP) fluoroprotein foam concentrate which has the ability to form an aqueous film on the surface of some hydrocarbons 3.16 foam solution s
47、olution of foam concentrate and water 3.17 forceful application application of foam to fall directly onto the surface of a liquid fuel 3.18 gentle application application of foam indirectly to the surface of a liquid fuel via a backboard, tank wall or other surface 3.19 sediment insoluble particles
48、in the foam concentrate 3.20 spreading coefficient measure of the ability of one liquid to spontaneously spread across the surface of another 4 Grades and uses of foam concentrates 4.1 Grade The foam concentrate shall be graded for extinguishing performance as class I, II or III; for burnback resist
49、ance as level A, B, C or D; according to its test fire performance (see clause 13). NOTE 1Typical anticipated extinguishing performance classes and burnback resistance levels for AFFF, FFFP, FP, P and S foam concentrates are given in annex K. 4.2 Use with sea water If a foam concentrate is marked as suitable for use with sea water, the recommended concentrations for use with fresh water and sea water shall be identical. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:52:37