SANS 1910-2009 Portable refillable fire extinguishers《便携式充装灭火器》.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23127-9 SANS 1910:2009Edition 1.2SOUTH AFRICAN NATIONAL STANDARD Portable refillable fire extinguishers Published by SABS Standards Divisi

4、on 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 1910:2009 Edition 1.2 Table of changes Change No. Date Scope Amdt 1 2006 Amended to update referenced standards, to change the requirements for the components of a fire ex

5、tinguisher, to correct the procedure for the ageing test, to correct a footnote in table D.2, and to include a title for the figure in annex E. Amdt 2 2009 Amended to move reference to legislation to the forward, to update the title of the annex on indication of test fire rating, and to add tables f

6、or minimum fire ratings. Foreword This South African standard was approved by National Committee SABS SC 21A, Fire safety Fire-fighting equipment, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document supersedes SANS 1910:200

7、6 (edition 1.1). This document was published in August 2009. A vertical line in the margin shows where the text has been technically modified by amendment No. 2. Reference is made in clause 1 to the “relevant national legislation“. In South Africa this means the Occupational Health and Safety Act, 1

8、993 (Act No. 85 of 1993). Amdt 2 Annexes A, B, C and D form an integral part of this standard. Annexes E and F are for information only. SANS 1910:2009 Edition 1.2 1 Contents Page Foreword 1 Scope . 3 2 Normative references . 3 3 Definitions 4 4 General requirements 5 5 Design and construction 8 6 P

9、erformance requirements 14 7 Packing and marking . 15 8 Inspection and methods of test 17 8.1 Inspection . 17 8.2 Leakage test . 17 8.3 Design pressure test for complete fire extinguisher . 17 8.4 Test for corrosion resistance of the assembled fire extinguisher 18 8.5 Test for the design, constructi

10、on and quality of plastic components . 18 8.6 Test for resistance of plastic components to burst pressure . 18 8.7 Impact test on operating heads 19 8.8 Test for resistance of hose to kinking 20 8.9 Hydrostatic pressure test on hose assemblies 21 8.10 Pressure relief valve test 21 8.11 Intermittent

11、discharge test 21 8.12 Fire extinguisher performance test 22 8.13 Test for electrical conductivity 22 Annex A (normative) Notes to purchasers . 23 Annex B (normative) Indication of test fire rating and minimum fire ratings 24 Amdt 2 Annex C (normative) Fire classification symbols 25 Annex D (normati

12、ve) Class test fires 26 Annex E (informative) Recommended type of large and small wall brackets for mounting of fire extinguishers . 28 Annex F (informative) Quality verification of portable refillable fire extinguishers . 29 Bibliography 29 SANS 1910:2009 Edition 1.2 2 This page is intentionally le

13、ft blank SANS 1910:2009 Edition 1.2 3 Portable refillable fire extinguishers 1 Scope 1.1 This standard covers the principal requirements for the safety, reliability and performance of portable, stored pressure, refillable type fire extinguishers suitable for use on fires of classes A, B and C. 1.2 T

14、his standard covers the requirements for water type, foam type and dry chemical powder type fire extinguishers. 1.3 It does not cover the requirements for CO2fire extinguishers. For the requirements of this fire extinguisher, refer to SANS 1567. 1.4 It does not cover Halon type extinguishers. (South

15、 Africa has agreed to abide by the Montreal Agreement on the use of CFC products. However, maintenance on this type of extinguisher is still carried out in terms of SANS 1475-1.) Amdt 1 1.5 It does not cover the cartridge operated extinguisher. NOTE 1 External cartridge operated extinguishers should

16、 be approved by the approving authority. NOTE 2 In terms of the National Building Regulations (see SANS 10400), every type of portable fire extinguisher distributed in South Africa has to comply with the requirements of a local standard. (See the relevant national legislation (see foreword). Details

17、 of the regular control, inspection and maintenance of fire extinguishers are given in SANS 10105-1 and SANS 1475-1. Amdt 1; amdt 2 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this standard. All standards are subje

18、ct to revision and, since any reference to a standard is deemed to be a reference to the latest edition of that standard, parties to agreements based on this standard are encouraged to take steps to ensure the use of the most recent editions of the standards indicated below. Information on currently

19、 valid national and international standards can be obtained from the SABS Standards Division. ISO 4582, Plastics Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources. SANS 988, Braided reinforced rubber

20、 hose for air and water. SANS 1086, Flexible polyvinyl chloride (PVC) pressure hose. SANS 1910:2009 Edition 1.2 4 SANS 1091, National colour standard. SANS 1522, Fire extinguishing powders. SANS 1567, Portable rechargeable fire extinguishers CO2type extinguishers. SANS 1739, Low pressure welded stee

21、l cylinders for fire extinguishers. SANS 6172, Fire extinguishers Assessment of fire rating. SANS 7253/ISO 7253, Paints and varnishes Determination of resistance to neutral salt spray (fog). Amdt 1 3 Definitions For the purpose of this standard, the following definitions apply. 3.1 acceptable accept

22、able to the authority administering this standard, or to the parties concluding the purchase contract, as relevant 3.2 accessories refers to fitted hose, head, siphon tube, pressure indicator and nozzle 3.3 capacity mass of the charge that is intended by the manufacturer to be contained in a fully c

23、harged extinguisher 3.4 charge extinguishing medium and the expellants contained in a fully charged extinguisher 3.5 classes of fire 3.5.1 class A fire fire in ordinary combustible material, such as wood, cloth, paper, rubber and many plastics 3.5.2 class B fire fire in flammable liquids, oils, grea

24、ses, tars, oil base paints, lacquers, and flammable gases 3.5.3 class C fire fire involving energized electrical equipment where the electrical non-conductivity of the extinguishing media is of importance 3.6 contents type of extinguishing medium (e.g. water, dry chemical powder or foam) SANS 1910:2

25、009 Edition 1.2 5 3.7 height overall height of the extinguisher up to the top of the handle 3.8 portable fire extinguisher fire-fighting appliance fully charged and ready for use (of total mass not exceeding 23 kg) that is intended to be carried and operated by one person 3.9 production tests tests

26、conducted by the manufacturer to verify the quality of the fire extinguisher being manufactured 3.10 test fire rating designation consisting of a numeral and a letter, which together indicate the size (numeral) and class (letter) of the largest test fire that an extinguisher bearing that rating can

27、extinguish 3.11 test pressure pressure for which the cylinder has been designed 3.12 working pressure normal working pressure for a cylinder in service 4 General requirements 4.1 Test fire rating, capacity and mass 4.1.1 Test fire rating (for class A and class B fires only) An extinguisher shall be

28、rated by the manufacturer for its performance in extinguishing a test fire as indicated on the extinguisher, as follows: a) water type extinguishing medium (see 7.2.1.2.1(a); b) foam type extinguishing medium (see 7.2.1.2.2(a); and c) dry chemical powder type extinguishing medium (see 7.2.1.2.3(a).

29、The rating shall be one of the test ratings given in SANS 6172, or of both ratings (see annex D). Powder grading shall be in accordance with the requirements of SANS 1522. 4.1.2 Capacity An extinguisher shall have a capacity in the range 1,0 kg to 5,0 kg (in increments of 0,5 kg) or in the range 5 k

30、g to 12 kg (in increments of 1,0 kg). The mass of the charge shall be equal to that marked on the extinguisher, subject to the tolerance given in table 1. SANS 1910:2009 Edition 1.2 6 Table 1 Filling tolerances 1 2 3 Extinguisher capacity Powder Water and water based media foams 1 kg 5 % 2 kg 3 % +

31、(0 5) % 3 kg 2 % 4.1.3 Mass The total mass of a fully equipped (including accessories), fully charged extinguisher (excluding the mounting bracket) shall be equal to that marked on the extinguisher (see 7.2.1.3(c), subject to a tolerance of 5,0 %, but not in excess of 23 kg. 4.2 Components of a fire

32、 extinguisher 4.2.1 An extinguisher shall consist of a steel cylinder complying with SANS 1739, complete with at least the following components: Amdt 1 a) an operating head secured onto the neck ring and carrying the actuating mechanism and control valve, or having these attached to the end of the d

33、ischarge hose; b) an internal siphon tube securely fitted in an acceptable manner; c) a discharge nozzle, mounted onto or adjacent to the operating head or, when relevant (see (d) and (e) below), onto the end of a discharge hose; d) in the case of an extinguisher of capacity 3 kg or more, a discharg

34、e hose (see (a); e) when a discharge hose is fitted, an acceptable method for anchoring the free end of the hose to the extinguisher; f) a carrying handle or other facility for using the extinguisher in an acceptable manner; g) support fittings fitted to the fire extinguisher (see 5.12) in an accept

35、able manner; h) a wall mounting bracket (see 5.13); i) a pressure indicator; and j) a pressure relief valve. 4.2.2 Any other components fitted to the extinguisher shall not compromise its performance and operation requirements as specified in clauses 5 and 6. Amdt 1 4.3 Method of operation An exting

36、uisher shall be designed for operation in the vertical position, with the actuating device at the top. It shall be actuated by means of a mechanism that opens a sealing device or valve, thereby allowing the discharge of the extinguishing medium. SANS 1910:2009 Edition 1.2 7 The discharge coming thro

37、ugh the discharge nozzle shall be controlled by a valve operated by a trigger device that allows the operator to interrupt the flow of the extinguishing medium. The method of operation shall be readily apparent and in accordance with the instructions marked on the cylinder (see 7.2.1.2.3(c). 4.4 Des

38、ign pressures 4.4.1 Working pressure The actual working pressure to which an extinguisher is pressurized for service shall be marked on the extinguisher label and shall not exceed 1 500 kPa or 2 500 kPa, as relevant. (See 7.2.1.3(b) and SANS 1739.) 4.4.2 Hydraulic pressure test (for components) When

39、 tested in accordance with 8.3, the extinguisher and all fittings subject to pressure, except pressure indicators and pressure relief devices, shall not leak or distort permanently at any pressure up to and including the hydraulic test pressure. 4.5 Charge of a fire extinguisher 4.5.1 General The ch

40、arge of an extinguisher shall consist of an effective combination of an acceptable extinguishing medium and an expellant. Tracers may be added to the expellant to facilitate leakage detection, but shall not exceed a mass fraction of 3 % of the expellant content. NOTE The details for the charging of

41、an extinguisher are very specific and an extinguisher that has not been recharged as intended by the manufacturer may be dangerous, either due to excessive pressure and risk of failure, or due to low pressure, which would render the extinguisher ineffective. 4.5.2 Water type extinguisher 4.5.2.1 Ext

42、inguishing medium The extinguishing medium shall be water and the water shall be clean and any additives shall be limited to a corrosion inhibitor, non-corrosive freezing point depressants, and non-corrosive wetting agents. Additives shall be such that, in use, they do not cause the production of to

43、xic compounds or the support of a fire. 4.5.2.2 Corrosion resistant coating A cylinder (including all repaired cylinders) shall have a light-duty or heavy-duty corrosion resistant coating, as required (see annex A). The coating shall be applied on the inside and on the outside. The type and method o

44、f application of the coating shall be such that, when a cylinder is tested in accordance with SANS 1739, there is no detachment of any part of the coating material. 4.5.3 Foam type fire extinguishers 4.5.3.1 The extinguishing medium shall be fire-fighting type foam. 4.5.3.2 A cylinder (including all

45、 repaired cylinders) shall have a light-duty or heavy-duty corrosion resistant coating, as required (see annex A). The coating shall be applied on the inside and on the outside. SANS 1910:2009 Edition 1.2 8 4.5.4 Dry chemical powder fire extinguisher The extinguishing medium shall be a dry powder th

46、at complies with SANS 1522. 4.5.5 Expellants Only expellants specified in table 2, or mixtures thereof, shall be used. The maximum water content shall be as specified, except when used in stored pressure water-based extinguishers. Table 2 Expellants 1 2 Expellants Maximum water content Types % mass

47、fraction Aira(for water type extinguishers only) 0,006 Argon 0,006 Helium 0,006 Nitrogen 0,006 aNot to be used on dry chemical powder (DCP) extinguishers. 4.6 Electrical conductivity of a water-based fire extinguisher charge The charge of a water-based extinguisher that is marked for use on fires in

48、 the presence of live electric power shall, when tested in accordance with 8.13, not allow a current of more than 0,5 mA to pass. NOTE Water and water-based product fire extinguishers are not recommended for use on electrical fires, except in special circumstances where special training has been giv

49、en to the operator(s) in the use of such equipment. 4.7 Production tests 4.7.1 Manufacturers leakage test Every extinguisher shall, after having been charged and before delivery, have been subjected by the manufacturer to an acceptable leakage test and shall have shown no sign of leakage. (See 8.2 for an acceptable method of test.) 4.7.2 Quality of construction An acceptable quantity of extinguishers from each production run shall be tested in accordance with the test for quality of construction described in 8.3. There shall be no obvious defect in the pa