BS 7327-1-1990 Small fixed fire extinguishers - Specification for small fixed halon fire extinguishers《小型固定式灭火器 小型固定式哈龙灭火器规范》.pdf

《BS 7327-1-1990 Small fixed fire extinguishers - Specification for small fixed halon fire extinguishers《小型固定式灭火器 小型固定式哈龙灭火器规范》.pdf》由会员分享，可在线阅读，更多相关《BS 7327-1-1990 Small fixed fire extinguishers - Specification for small fixed halon fire extinguishers《小型固定式灭火器 小型固定式哈龙灭火器规范》.pdf（22页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD BS 7327-1: 1990 Small fixed fire extinguishers Part 1: Specification for small fixed halon fire extinguishersBS7327-1:1990 This British Standard, having been prepared under the directionof the Fire StandardsPolicy Committee, waspublishedunder the authorityofthe Board of BSIandcomes

2、intoeffect on 31 October 1990 BSI 10-1990 The following BSI references relate to the work on this standard: Committee reference FSM/13 Draft for comment 89/42717 DC ISBN 0 580 18615 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Fire

3、Standards Policy Committee (FSM/-) to Technical Committee FSM/13, upon which the following bodies were represented: Association of Metropolitan Authorities British Automatic Sprinkler Association British Fire Protection Systems Association Ltd. British Fire Services Association British Nuclear Fuels

4、 Ltd. Chief and Assistant Chief Fire Officers Association Convention of Scottish Local Authorities Department of Health Department of the Environment (Building Research Establishment) Department of the Environment (Property Services Agency) Department of Transport (Marine Directorate) Electricity Su

5、pply Industry in England and Wales Engineering Equipment and Materials Users Association Fire Brigades Union Fire Extinguishing Trades Association Health and Safety Executive Hevac Association Home Office Incorporated Association of Architects and Surveyors Institution of Fire Engineers Lloyds Syndi

6、cates Survey Department London Fire and Civil Defence Authority Loss Prevention Council Ministry of Defence Royal Institute of British Architects Society of Fire Protection Engineers Society of Motor Manufacturers and Traders Ltd. United Kingdom Atomic Energy Authority Warrington Fire Research Centr

7、e Water Research Centre Amendments issued since publication Amd. No. Date CommentsBS7327-1:1990 BSI 10-1999 i Contents Page Committees responsible Inside front cover Foreword iii Section 1. General 1.1 Scope 1 1.2 Definitions 1 Section 2. Contents, filling and overall mass of extinguishers 2.1 Filli

8、ng deviation 3 2.2 Halons acceptable for use 3 2.3 Propellant 3 2.4 Filling density 3 2.5 Cleanliness and contents 3 2.6 Maximum overall mass 3 2.7 Configuration 3 Section 3. Construction. All extinguishers 3.1 Venting 4 3.2 Mounting 4 3.3 Pipework and fittings 4 3.4 Corrosion resistance 4 3.5 Press

9、ure indicating device 4 Section 4. Construction. Low pressure extinguishers 4.1 Resistance to internal pressure 5 4.2 Minimum burst pressure 5 Section 5. Construction. High pressure extinguishers 5.1 Body 6 5.2 Pressure relief device 6 5.3 Operating head materials 6 5.4 Resistance of fittings to int

10、ernal pressure 7 5.5 Minimum burst pressure of fittings 7 Section 6. Additional requirements for non-rechargeable extinguishers with permanently attached swaged closures 6.1 Maximum capacity 8 6.2 Closures 8 6.3 Dimensions 8 Section 7. Performance 7.1 Leakage 9 7.2 Duration of discharge 9 7.3 Fire e

11、xtinguishing performance 9 Section 8. Installation instructions and marking of extinguishers 8.1 General 10 8.2 Marking of high pressure extinguisher bodies 10 8.3 Installation and servicing instructions and information 10 Section 9. Production and type testing 9.1 General 12 9.2 Low pressure exting

12、uishers 12 9.3 Fittings for high pressure extinguishers 12 9.4 Non-rechargeable extinguishers with permanently attached swaged closures 12 9.5 Retention of charge 12BS7327-1:1990 ii BSI 10-1999 Page Appendix A Test for security of mounting 13 Appendix B Test for corrosion resistance of extinguishers

13、 and fittings 13 Appendix C Pressure tests 13 Appendix D Test for duration of discharge 13 Table 1 Mechanical properties of copper alloys 7 Table 2 Batch sampling plan following failure below design burst pressure 12 Publications referred to Inside back coverBS7327-1:1990 BSI 10-1999 iii Foreword Th

14、is Part of BS 7327 has been prepared under the direction of the Fire Standards Policy Committee. It is intended to cover certain types of fire extinguishing devices which are of relatively small size and extinguishing performance, and which are intended for installation by the owner rather than spec

15、ialist installation engineers. In this respect they differ from the types of fixed fire extinguishing system covered by Parts2,4 and5 of BS5306. This specification may be considered as being complementary to those Parts of BS5306. Some use has been made of BS5423 in the drafting with requirements mo

16、dified where necessary because of the different design functions. Although only new, and not recharged, fixed fire extinguishers are covered, the committee considers that some account could usefully be taken of the appropriate requirements and recommendations of this British Standard in respect of t

17、he recharging of discharged extinguishers. Attention is drawn to BS6535-2.2 which covers procedures for the transfer of halons from one container to another which will reduce the emissions of halons to the atmosphere, The procedures can be applied to the filling and emptying of fixed halon fire exti

18、nguishers and the recovery of halons from extinguishers returned for scrapping, cleaning or examination. Fixed fire extinguishers are installed singly to cover one or more fire hazards. Although more than one may be installed in the same area to cover separate hazards, the linking, mechanically or e

19、lectrically, of fixed fire extinguishers is not covered in this specification. Reference should be made to the appropriate Part of BS5306 if such linking is considered. Fixed fire extinguishers of the halon type may be installed to cover hazards where class B (according to the classification of BS45

20、47) fires (except deep fat fires, for example in fryers), or class A (according to the classification of BS4547) fires which will not become deep-seated, may occur. Since halons have very low electrical conductivity and leave no residue they are often used where fires may occur in or near electrical

21、 equipment. It is intended to prepare other Parts of BS7327 which will cover extinguishers containing media other than halons. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard

22、based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS5750. Enquires as to the availability of third party certification schemes will be forwarded by BSI to the Association of Certification Bodies. If a thi

23、rd party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct ap

24、plication. 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 to iv, pages1to 14, an inside back cover and a back cover. This standard has been updated (see copyright dat

25、e) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS7327-1:1990 BSI 10-1999 1 Section 1. General 1.1 Scope This Part of BS7327 specifies manufacturing requirements for rechargeable and non-rechargeable metal-bodied small fixe

26、d fire extinguishers of the stored pressure type containing either halon1211or halon1301. It relates only to fixed fire extinguishers for separate installation,i.e.not mechanically or electrically linked to any other extinguisher. It does not specify installation requirements or recommendations for

27、safe use. Information on the safe use of halons is given in BS5306-5, and HSE Guidance Note GS16. NOTE 1All pressures in this standard are gauge pressures expressed in bar. 1 bar =10 5 N/m 2 =100kPa. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cove

28、r. 1.2 Definitions For the purposes of this Part of BS7327, the following definitions apply. 1.2.1 automatic operation operation of the extinguisher which does not require human intervention 1.2.2 body the metal shell of an extinguisher, excluding all closures, safety devices and pressure indicators

29、, designed to contain the extinguishing medium, and including any skirt 1.2.3 charge the mass of the extinguishing medium contained in the extinguisher expressed in kilograms 1.2.4 closure a component, other than a safety device or pressure indicator, subject to the working pressure and used to clos

30、e off and seal the filling or pressurizing openings, or both, in the body 1.2.5 high pressure extinguisher an extinguisher whose working pressure (P s ) (see1.2.18) exceeds25bar 1.2.6 low pressure extinguisher an extinguisher whose working pressure (P s ) (see1.2.18) does not exceed25bar 1.2.7 non-r

31、echargeable (disposable) extinguisher an extinguisher designed not to be recharged in the field or at the factory, but intended to be discarded after use 1.2.8 rechargeable extinguisher an extinguisher designed to be recharged after use 1.2.9 stored pressure extinguisher an extinguisher in which the

32、 propellant gas is stored with the extinguishing medium in the body as a whole and the extinguisher body is permanently pressurized 1.2.10 filling density the mass in kilograms of charge per litre of container volume, as fitted for use,plete with valve and internal fittings 1.2.11 fixed fire extingu

33、isher (fixed extinguisher) an appliance containing an extinguishing medium that can be expelled by the action of internal pressure and which, whether or not it is intended for manual operation, does not have provision for manual direction of the discharge NOTEThroughout this specification this term

34、is usually abbreviated to extinguisher. 1.2.12 halon a halogenated hydrocarbon used as an extinguishing medium NOTEHalons are designated by a number in which: a) the first digit is the number of the carbon atoms in the molecule; b) the second digit is the number of fluorine atoms in the molecule; c)

35、 the third digit is the number of chlorine atoms in the molecule; d) the fourth digit is the number of bromine atoms in the molecule. Thus bromochlorodifluoromethane is halon1211. The halon number does not distinguish between isomers. 1.2.13 head (operating head) a component that enables the extingu

36、isher to be discharged either manually or automatically or both 1.2.14 manual operation operation of the extinguisher which requires human interventionBS7327-1:1990 2 BSI 10-1999 1.2.15 operating temperature the temperature at which an automatic device will operate a fixed extinguisher 1.2.16 design

37、 burst pressure (P B ) a pressure not less than3.375P s(see1.2.18) or50bar whichever is the greater 1.2.17 design test pressure (P E ) the pressure equal to1.35P s(see1.2.18) rounded to the next higher integral value 1.2.18 working pressure (P s ) the equilibrium pressure developed within the exting

38、uisher or cartridge when filled with the nominal charge (see1.2.3 and2.1) and at a temperature of60 C 1.2.19 propellant a gas in a liquefied or compressed state, which provides the internal pressure used to expel the extinguishing medium 1.2.20 service temperature range the ambient air temperature r

39、ange within which the fixed fire extinguisher may be used NOTEExtinguishers exposed to radiant heat sources may reach temperatures higher than ambient air temperatures.BS7327-1:1990 BSI 10-1999 3 Section 2. Contents, filling and overall mass of extinguishers 2.1 Filling deviation The actual charge o

40、f an extinguisher shall be the nominal charge within the limits+0,5%, by mass. 2.2 Halons acceptable for use The extinguishing medium shall be either halon1211 (bromochlorodifluoromethane) or halon1301(bromotrifluoromethane) and shall comply with the appropriate requirements of BS6535-2.1. 2.3 Prope

41、llant The propellant shall be nitrogen with a maximum water content of0.006% (m/m). 2.4 Filling density 2.4.1 Halon 1211 The maximum filling density for halon1211extinguishers shall be1.47kg/L. 2.4.2 Halon 1301 The maximum filling density for halon1301extinguishers shall be either: a) 0.74 kg/L if a

42、 pressure relief device complying with5.2 is not fitted; or b) 1.12 kg/L if a pressure relief device complying with5.2 is fitted. 2.5 Cleanliness and contents Extinguishers shall be supplied filled with halon and propellant and the extinguisher body shall be clean and dry internally at the time of f

43、illing. NOTEBS6535-2.2 gives recommendations and advice on the handling of halons. 2.6 Maximum overall mass The mass of the extinguisher complete with all fittings and charged with the nominal charge and propellant shall not exceed23kg. 2.7 Configuration The configuration of the extinguisher shall b

44、e such that when mounted in accordance with the manufacturers instructions not less than85% of the charge will be discharged from the liquid phase (calculated at25 C, and assuming a plane liquid surface) before discharge from the gaseous phase occurs.BS7327-1:1990 4 BSI 10-1999 Section 3. Constructi

45、on. All extinguishers 3.1 Venting Each closure and removable pressure retaining part, except those that are not intended to be removed for servicing or maintenance, shall be provided with an automatic means of venting residual pressure from the extinguisher. Any venting shall initially occur when th

46、e closure securing means is disengaged by not more than1/3of full engagement. 3.2 Mounting 3.2.1 Where the extinguisher is designed to be supported by the floor or other horizontal surface, the extinguisher shall be either provided with a skirt which projects at least6mm below the pressure retaining

47、 part of the body, or the thickness of metal in the lowest part or parts of the body shall be not less than1.5times the minimum thickness of the cylindrical part of the body. 3.2.2 The extinguisher shall be provided with a means of fixing and mounting arranged so that when installed as recommended b

48、y the manufacturer no pressure retaining part of the extinguisher will be less than5mm from any plane wall, floor, shelf, etc. The extinguisher shall not be dislodged from its mounting when operated at the maximum service temperature (see1.2.20) when tested by the method described inAppendix A. NOTE

49、The means of fixing and mounting should prevent excessive displacement or movement of the extinguisher when operated, to reduce the risk of injury or damage. 3.3 Pipework and fittings The extinguisher shall be supplied together with all necessary pipework (rigid and/or flexible) and fittings but not necessarily with primary fixing/support devices see8.3 f). 3.4 Corrosion resistance There shall be no internal or external signs of corrosion of the parent metal of the extinguisher body or fittings, including any pressure relief device, when the extinguisher is