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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7937:2000 ICS 13.220.1
2、0 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for portable fire extinguishers for use on cooking oil fires (class F) Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This
3、 British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2000 BSI 03-2000 The following BSI references relate to the work on this standard: Committee refe
4、rence FSH/2/11 Draft for comment 98/542910 DC ISBN 0 580 33088 5 BS 7937:2000 Amendments issued since publication Amd. No.DateComments Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee FSH/2, Fire extinguishers, to Subcommi
5、ttee FSH/2/11, Portable fire extinguishers (manufacture), upon which the following bodies were represented: British Compressed Gases Association British Fire Consortium Buying Agency Chief and Assistant Chief Fire Officers Consumer Policy Committee of BSI Department of the Environment, Transport and
6、 the Regions (Central Transport Group) Department of the Environment, Transport and the Regions (Highways Agency) Fire Extinguishing Trades Association Home Office Institute of Petroleum London Fire and Civil Defence Authority Loss Prevention Council Loss Prevention Certification Board Nationwide Fi
7、re Services Society of Chemical Industry Society of Motor Manufacturers and Traders Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7937:2000 BSI 03-2000i Contents Page Committees responsibleInside front cov
8、er Forewordii 1Scope1 2Normative references1 3Terms and definitions1 4Extinguisher types1 5General requirements1 6Portability and use2 7Discharge2 8Test fire ratings2 9Effective range of operating temperatures and requirements for mechanical parts3 10Marking3 Annex A (normative) Range of discharge5
9、Annex B (normative) Class F fire test5 Annex C (normative) Range of operating temperatures7 Annex D (informative) Example of marking requirements for portable fire extinguishers for use on cooking oil fires8 Annex E (normative) Pictograms representing the types of fire9 Figure B.1 Class 5F fire test
10、 apparatus6 Figure B.2 General dimensions for the simulated deep fryer class 15F, 25F and 75F7 Figure D.1 Example of a marking label8 Figure E.1 Pictograms representing types of fire9 Table 1 Exceptions to the requirements of BS EN 32 Table 2 Duration of discharge2 Table 3 Fire rating and quantity o
11、f agent for class F extinguishers3 Table C.1 Temperature cycles7 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 03-2000 BS 7937:2000 Foreword This British Standard has been prepared by Technical Committ
12、ee FSH/2/11. It specifies additional requirements for extinguishers to those of BS EN 31 to 6 and the requirements of BS EN 3-1 to 6 which are not applicable. BS EN 3 only allows extinguishers with nominal charges of 1 kg, 2 kg, 3 kg, 4 kg, 6 kg, 9 kg, 12 kg, 2 l, 3 l, 6 l and 9 l. However, for the
13、purposes of this standard, extinguishers with other nominal charges are permitted. Annexes A, B, C and E are normative. Annex D is informative. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct appl
14、ication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the
15、document was last issued. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 03-20001 BS 7937:2000 1 Scope This British Standard specifies requirements for portable fire extinguishers to be used on class F fir
16、es in cooking appliances that involve cooking media (vegetable or animal oils and fats). 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dated references, subsequent amendments to,
17、or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies. BS 381C:1996, Specification for colours for identification, coding and special purposes. BS EN 2, Classification of fires. BS EN 3-1:1996, Portable fire extingu
18、ishers Part 1: Description, duration of operation, class A and B fire test. BS EN 3-2:1996, Portable fire extinguishers Part 2: Tightness, dielectric test, tamping test, special provisions. BS EN 3-3:1996, Portable fire extinguishers Part 3: Construction, resistance to pressure, mechanical tests. BS
19、 EN 3-4:1996, Portable fire extinguishers Part 4: Charges, minimum required fire. BS EN 3-5:1996, Portable fire extinguishers Part 5: Specification and supplementary tests. BS EN 3-6:1996, Portable fire extinguishers Part 6: Provisions for the attestation of conformity of portable fire extinguishers
20、 in accordance with EN 3 Part 1 to Part 5. 3 Terms and definitions For the purpose of this British Standard, the terms and definitions given in BS EN 2 and BS EN 3-1 to 6 and the following apply. 3.1 class F fire fire in cooking appliance that involves combustible cooking media (vegetable or animal
21、oils and fats) 3.2 wet chemical extinguishing medium which includes, but is not limited to, aqueous solutions of potassium acetate, potassium carbonate, potassium citrate or combinations of these materials 3.3 powder extinguishing medium capable of fluidization 3.4 auto-ignition non-piloted initiati
22、on of combustion caused solely by the elevation in temperature of the material 3.5 non-piloted ignition ignition without the application of direct heat to the vapour emission of a material 3.6 pre-burn time designated period which follows ignition during which time combustion can stabilize throughou
23、t the material 3.7 range of discharge distance from the nozzle to the point on the ground beyond which 50 % of the discharge falls for water based extinguishers 4 Extinguisher types Portable fire extinguishers for use on cooking oil fires shall be one of the following types, described by the type of
24、 extinguishing medium they contain: a) water based, including foam and wet chemical; b) powder type extinguishers; c) carbon dioxide type extinguishers; d) halogenated hydrocarbon type extinguishers; e) clean agent extinguishers. Where water based models are produced with or without freezing point d
25、epressant, they shall be treated as separate and distinct models for the purposes of range of operating temperatures, electrical conductivity and fire rating tests. NOTEOther assessments relating to the design and construction of the product may be cross referred where possible. 5 General requiremen
26、ts Portable fire extinguishers for use on cooking oil fires shall conform to the requirements of this standard and BS EN 3 with the exception of the clauses given in Table 1. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled C
27、opy, (c) BSI 2 BSI 03-2000 BS 7937:2000 Table 1 Exceptions to the requirements of BS EN 3 BS EN 3 part number Clause numberTitle 16.1Duration of operation 26.3Hose assembly 43.1Nominal charges 5Clause 3Effective range of operating temperature and resistance of mechanical parts 5.1External corrosion
28、Clause 7Extinguisher identification 6 Portability and use Extinguishers shall have a maximum gross mass of 20 kg and be capable of single user operation. All extinguishers rated 15F, 25F or 75F shall be equipped with a rigid discharge lance of 0.4 m minimum rigid length and have a flexible discharge
29、 hose of 0.4 m minimum length. 7 Discharge 7.1 Duration of discharge The duration of discharge when measured by the method described in BS EN 3-1:1996, annex A shall not be less than the values given in Table 2. Table 2 Duration of discharge Size l or kg Minimum duration of operation s # 115 1 # 325
30、 3 # 640 660 7.2 Range of discharge The minimum range of discharge shall be 1 m when the extinguisher is tested in accordance with annex A. 8 Test fire ratings 8.1 General Portable fire extinguishers for use on cooking oil fires shall have a class F test fire rating. NOTEExtinguishers may also have
31、class A and B fire ratings (see 8.2 and 8.3). 8.2 Class A fire rating The class A fire test rating shall be determined in accordance with BS EN 3-1:1996, B.2. 8.3 Class B fire rating The class B fire test rating shall be determined in accordance with BS EN 3-1:1996, B.3. 8.4 Class F fire rating 8.4.
32、1 General Extinguishers shall have a class F fire rating in accordance with Table 3 when tested in accordance with annex B. 8.5 Efficiency tests A class F fire rating shall be achieved when two fire tests of a series are extinguished in accordance with annex B. A series shall be complete after three
33、 fires, or when the first two fires are extinguished or not. Each series shall be completed before the next is commenced. Although there is no restriction on the number of series that may be carried out on the same type of extinguisher without modifications, a series shall consist of consecutive fir
34、es and results shall not be discounted. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 03-20003 BS 7937:2000 Table 3 Fire rating and quantity of agent for class F extinguishers RatingVolume of cooking oil
35、in test fire Test apparatusMaximum agent quantity lmml or kg 5F 5 0 +1 Type A 300 dia 2 15F 15 0 +1 Type B X = 448 Y = 224 3 25F 25 0 +1 Type B X = 578 Y = 289 6 75F 75 0 +1 Type B X = 1 000 Y = 500 9 Liquid agents shall be measured in litres (l). NOTEDimensions for type A apparatus shown in Figure
36、B.1 have a manufactured tolerance of 10 mm. 9 Effective range of operating temperatures and requirements for mechanical parts 9.1 General Portable fire extinguishers shall have a minimum operating temperature range of 0 8C to +60 8C (T(max) 8C). NOTEA temperature below 0 8C may be specified by the m
37、anufacturer. Portable fire extinguishers shall be capable of operating and be resistant to shock throughout the marked operating temperature range, after testing in accordance with annex C. 9.2 Operational requirements Portable fire extinguishers shall conform to the following requirements. a) The f
38、orce required to remove the safety device shall be between 20 N and 100 N in accordance with BS EN 3-5:1996, 4.2. b) The force or energy required to activate the operating device(s) shall be in accordance with BS EN 3-5:1996, Table 1. c) The discharge shall commence within 10 s of the opening of the
39、 control valve in accordance with BS EN 3-5:1996, 3.2. d) The discharge duration shall conform to the appropriate minimum value in Table 2. e) Not less than 90 % of the nominal charge of the agent shall be discharged from the extinguisher after continuous discharge including all expelling gas in acc
40、ordance with BS EN 3-1:1996, 6.2. 9.3 External corrosion Portable fire extinguishers shall be tested in accordance with the external corrosion test in BS EN 3-5:1996, H.1 and shall conform to 9.2 and the following additional requirements. a) The mechanical operation of all working parts shall be uni
41、mpaired. b) The pressure indicator, if fitted, shall remain functional. c) There shall be no corrosion of the metal of the extinguisher likely to impair its operation or safety. d) The extinguisher shall meet the functioning test and burst pressure requirements of BS EN 3-3:1996, 6.1 and 6.3. 9.4 El
42、ectrical non-conductivity All water based extinguishers shall conform to the requirements of the dielectric test in BS EN 3-2:1996, clause 4. 10 Marking 10.1 Colour The extinguisher body shall be red in accordance with BS 381C:1996, Ref. No. 537. There shall be an area of between 3 % and 10 % of the
43、 external area of the body coloured canary yellow, in accordance with BS 381C:1996, Ref. No. 309. 10.2 Marking NOTE 1 See the example in annex D. The marking on portable fire extinguishers shall be in contrasting colours to the background. The marking shall be divided into five parts as shown in Fig
44、ure D.1. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:47:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 BSI 03-2000 BS 7937:2000 1) Marking BS 7937:2000 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by o
45、r on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsiblity. Such a declaration is not to be confused with third-party certification of conformity. The marking required for parts 1, 2, 3 and 5 shall be conta
46、ined on the same label or in the same frame. The label (or frame) shall be in such a position that it can be clearly read when the extinguisher is on its mounting bracket. NOTE 2 The marking required for part 4 may be placed elsewhere on the portable fire extinguisher. The height, H, of the letterin
47、g (determined by reference to an upper case letter X) shall be not less than: 3 mm for portable fire extinguishers having a charge #3 kg or #3 l; 5 mm for portable fire extinguishers having a charge 3 kg or 3 l. The height of the lettering in parts 1, 2, 3 and 4 shall be in the following proportions
48、 subject to a tolerance of%: 0 +10 part 1: 1.5 3 H for the words fire extinguisher 0.75 3 H for the other information; part 2: 1 3 H; part 3: 1 3 H; part 4: 0.5 3 H. The height of the frame containing part 5 shall not exceed of the total height of parts 1, 2 and 3. Part 1 shall contain the following
49、 information in sequence: first line: the words Fire Extinguisher or Fire Extinguisher plus medium; second line: the type of extinguishing medium and the nominal charge; third line: the fire rating or ratings achieved. Part 2 shall contain the following information. The instructions for use, which shall include one or more pictograms each with an explanation. The text of the instructions for use for the different actions to be carried out shall be shown one after another vertically from top to bottom. The pict
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