1、BS 8489-1:2016Fixed fire protectionsystems Industrial andcommercial watermistsystemsPart 1: Code of practice for designand installationBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Publishing and copyright informationThe BSI copyright notice displayed in this docum
2、ent indicates when the documentwas last issued. The British Standards Institution 2016Published by BSI Standards Limited 2016ISBN 978 0 580 85528 3ICS 13.220.01; 13.220.20The following BSI references relate to the work on this document:Committee reference FSH/18/5Draft for comment 14/30295814 DCPubl
3、ication historyFirst published as DD 8489-1, February 2011First published as BS 8489-1, May 2016Amendments issued since publicationDate Text affectedBS 8489-1:2016 BRITISH STANDARDContentsForeword iv0 Introduction 11 Scope 22 Normative references 33 Terms and definitions 44 General recommendations 8
4、4.1 Consultation 84.2 Situations where contact with water might cause a hazard 84.3 Local application 94.4 Volume protection 94.5 Oxygen depletion 94.6 Foam additives 95 Detection, actuation and control 105.1 Detection 105.2 Actuation and control 106 Design and installation 116.1 General 116.2 Syste
5、m design 136.3 Electrical design 166.4 Air velocity, openings and ventilation 166.5 Volume protection for enclosures 177 Components 177.1 General 177.2 Watermist nozzles 187.3 Piping and fittings 187.4 Valves 207.5 Strainers 217.6 Pressure measuring equipment 227.7 Water supply components 228 Water
6、supply, including additives 238.1 General 238.2 Water quality 238.3 Additives 238.4 Duration 248.5 Continuity 258.6 Maximum and minimum water pressure 268.7 Test devices 268.8 Type of water supply 269 Pressurization systems 279.1 Cylinders and storage tanks 279.2 Pump systems 279.3 Tanks 3310 Commis
7、sioning 3610.1 Pre-commissioning tests 3610.2 Commissioning tests 3710.3 Handover documentation 3711 Inspection and maintenance 3711.1 Users operation and maintenance manual 3711.2 General maintenance instructions 3811.3 Users programme for inspection and checking 3811.4 Users programme for service
8、and maintenance 40BRITISH STANDARD BS 8489-1:2016 The British Standards Institution 2016 iAnnexesAnnex A (informative) Elements of a typical watermist fire suppressionsystem 43Annex B (normative) Enhanced availability provisions for volume protectionsystems 47Annex C (informative) Assumed maximum ar
9、eas of operation for typicalwatermist systems 52Annex D (normative) Testing of nozzles 69Bibliography 70List of figuresFigure1Typical power supplies for watermist pumps 31Figure2Effective capacity of tank with a vortex inhibitor 34Figure3Effective capacity of tank without a vortex inhibitor 35Figure
10、 A.1 Fire pump and tank system 44Figure A.2 Fire pump and town mains system 45Figure A.3 Cylinder-based system 46Figure B.1 Duplicate installation control valve arrangement 48Figure B.2 Wet pipe watermist control valve arrangement with bypass 49Figure C.1 System components gridded layout 52Figure C.
11、2 System components terminal layout 53Figure C.3 System components looped layout 53Figure C.4 Selection of hydraulically most remote operating area 54Figure C.5 Selection of hydraulically most favourable operating area 55Figure C.6 Most unfavourable and most favourable AMAO demands and thepump suppl
12、y curve 56Figure C.7 Calculating the number of nozzles 58Figure C.8 How to calculate the area per nozzle (regular spacing) 59Figure C.9 How to calculate the area per nozzle (irregular spacing) 59Figure C.10 Actual area per nozzle 60Figure C.11 Area per nozzle irregular nozzle spacing further example
13、s 61Figure C.12 Hydraulically most unfavourable area terminal layout 62Figure C.13 Hydraulically most unfavourable area looped layout 63Figure C.14 Hydraulically most unfavourable area in a normal griddedlayout 63Figure C.15 Hydraulically most unfavourable area, gridded layout rangesparallel to roof
14、 64Figure C.16 Hydraulically most favourable area terminal layout 65Figure C.17 Hydraulically most favourable area looped layout 65Figure C.18 Hydraulically most favourable area in a gridded layout 66Figure C.19 Guidance on where the length of the AMAO starts andfinishes 67Figure C.20 Relocation of
15、section valves 68Figure C.21 Calculating the nozzles operating in a hydraulically mostunfavourable AMAO of 72 m268List of tablesTable 1 Occupancies and acceptable fire test protocols for an automaticwatermist system 12Table 2 Occupancy and acceptable fire test protocol of Class B and Class F firehaz
16、ards operated by a deluge system 13Table 3 Occupancy, operating volume and discharge duration for Class B andClass F fire hazards operated by a deluge system 14Table4Types of alarm for transmission 17BRITISH STANDARDBS 8489-1:2016ii The British Standards Institution 2016Table 5 Maximum spacing of fi
17、xings for copper and stainless steelpipework 19Table 6 Maximum spacing of fixings for steel pipework 19Table 7 Maximum spacing of fixings for CPVC pipework 20Summary of pagesThis document comprises a front cover, an inside front cover, pages i to vi,pages 1 to 70, an inside back cover and a back cov
18、er.BRITISH STANDARD BS 8489-1:2016 The British Standards Institution 2016 iiiForewordPublishing informationThis part of BS 8489 is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 31 May 2016. It wasprepared by Subcommittee FSH/18/5, Wa
19、termist systems, under the authority ofTechnical Committee FSH/18, Fixed fire fighting systems. A list of organizationsrepresented on these committees can be obtained on request to their secretary.SupersessionThis part of BS 8489 supersedes DD 8489-1:2011, which is withdrawn.Relationship with other
20、publicationsBS 8489 is published in the following parts: Part 1: Code of practice for design and installation; Part 4: Tests and requirements for watermist systems for local applicationsinvolving flammable liquid fires; Part 5: Tests and requirements for watermist systems for the protection ofcombus
21、tion turbines and machinery spaces with volumes up to andincluding 80 m3; Part 6: Tests and requirements for watermist systems for the protection ofindustrial oil cookers; Part 7: Tests and requirements for watermist systems for the protection oflow hazard occupancies.Information about this document
22、This document converts DD 8489-1 into a full British Standard. It is a full revisionof the Draft for Development, and incorporates the following principal changes: guidance on areas of operation; guidance on effective capacity of tanks; extension of scope of application to cover more areas in buildi
23、ngs whensupported by test standards produced by other organizations.Third-party testing/certification. Users of this British Standard are advised toconsider the desirability of third-party testing/certification of conformity withthis British Standard. It is usual in European countries for companies
24、given theresponsibility to design, install and maintain watermist systems in accordancewith this current British Standard to be certified in this field by an independentcertification body. There are a number of independent certification bodies thatcan attest conformity to this British Standard.Use o
25、f this documentAs a code of practice, this British Standard takes the form of guidance andrecommendations. It should not be quoted as if it were a specification andparticular care should be taken to ensure that claims of compliance are notmisleading.Any user claiming compliance with this British Sta
26、ndard is expected to be able tojustify any course of action that deviates from its recommendations.This British Standard is intended for use by manufacturers, designers andinstallers of watermist systems, and for authorities having jurisdiction.BRITISH STANDARDBS 8489-1:2016iv The British Standards
27、Institution 2016It has been assumed in the preparation of this British Standard that theexecution of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been produced.Presentational conventionsThe provisions in this British Standard are presented i
28、n roman (i.e. upright) type.Its recommendations are expressed in sentences in which the principal auxiliaryverb is “should”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.Where words have alternative spellings,
29、 the preferred spelling of the ShorterOxford English Dictionary is used (e.g. “organization” rather than“organisation”).Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compli
30、ance with a British Standard cannot confer immunity from legalobligations.Particular attention is drawn to the Water Supply (Water Fittings)Regulations 1999 1, the Water Supply (Water Fittings) (Scotland)Byelaws 2014 2 and the Water Supply (Water Fittings) Regulations (NorthernIreland) 2009 3 in res
31、pect of requirements for any fire suppression systemwhich conveys, or is likely to convey, water supplied by a water undertaker orlicensed water supplier.BRITISH STANDARD BS 8489-1:2016 The British Standards Institution 2016 vBRITISH STANDARDBS 8489-1:2016This page deliberately left blankvi The Brit
32、ish Standards Institution 20160 Introduction0.1 Watermist systemsFixed watermist systems for the fire protection of industrial and commercialhazards comprise specially designed nozzles mounted in pipework, securedwithin an industrial/commercial building, and connected via control valves to adedicate
33、d water supply.Specific areas within buildings can be protected by watermist where relevantfire test protocols exist.Both single fluid and twin fluid watermist systems deliver a mist of smalldroplets which control, suppress or extinguish fire by: absorbing heat from the fire and its surroundings; sm
34、othering the flames by evaporation to steam; blocking radiant heat transfer to adjacent combustible materials.Fires such as those involving flammable liquids (class B fires) can be extinguishedusing watermist. Fires such as those involving ordinary combustible materials(class A fires) can be control
35、led and suppressed using watermist. Watermist canalso prevent flash-over.With the high surface area of the droplets produced, watermist is able to absorbrelatively large amounts of heat and thus provide efficient cooling.Currently, the majority of applications for watermist relate to property and as
36、setprotection. However, under certain circumstances, watermist can improvetenability within the protected space and thus increase the chances of survivalfor personnel inside the protected areas. It can also enhance life safety in moregeneral applications by protecting facilities upon which the safet
37、y of peopledepends.The main elements of a typical watermist fire suppression system are shownin Annex A.0.2 Test protocolsOne of the greatest challenges to engineering of watermist fire suppressionsystems lies in determining whether the conditions of a particular test protocolare representative of t
38、he actual conditions in a given application based on anunderstanding of the dynamics of the interaction of watermist with fire.The following application parameters need to be determined as a minimum.a) Is the fuel similar to the test protocol (liquid or solid fuel, flash point,combustibility, quanti
39、ty, arrangement)?b) Is the compartment volume equal to or less than the volume of the testroom?c) Is the compartment height equal to or less than the test protocol?d) Is the compartment ventilation conditions similar (presence of fans, forcedventilation, etc., area of openings, position of openings)
40、?e) are there more obstructions to the distribution of mist than the testprotocol?f) Is the duration of protection provided by the listed system appropriate forthe actual level of protection needed?Watermist is a specific application solution which needs to be proven for eachindividual application a
41、nd/or occupancy and to have demonstrated performanceagainst standardized fire tests and component tests, as indicated by a reportissued by the fire test laboratory.BRITISH STANDARD BS 8489-1:2016 The British Standards Institution 2016 1System testing. Users of this British Standard are advised to co
42、nsider the desirabilityof using a test facility that operates a quality system and has watermist testing inthe scope of its accreditation. General requirements for the competence of testingand calibration laboratories are described in ISO/IEC 17025. Of particular importancewith respect to testing of
43、 watermist fire suppression systems are: comprehensive understanding of watermist technology; ability to properly condition and characterize the fuels; the use of appropriate instrumentation and methodology to verify thecompliance or non-compliance with the pass/fail criteria (as specified in therel
44、evant standard listed in Table 1 and Table 2) and repeatability.The watermist system is to be:1) tested in accordance with a recognized test protocol;2) published in a printed or online record by the testing laboratory.Reliance is to be placed on the procurement and installation of:i) watermist equi
45、pment or systems that have demonstrated performance instandardized fire tests as part of a test and evaluation process;ii) watermist equipment and components that are listed for the intendedapplication by the testing laboratory. This is to ensure reliability andperformance of the equipment and compo
46、nents in the system.A match needs to be established between test conditions on which the testing isbased and the conditions of the actual installation and agreed throughconsultation with the authority having jurisdiction (AHJ), or other agencies withdemonstrated qualifications in the field. Watermis
47、t systems can be assumed tobe effective if they: use only components and equipment recognized by a testing laboratory; are based upon the laboratory test report of a recognized test protocol; are installed by trained personnel in accordance with the manufacturerswatermist system design and installat
48、ion manual.Where a watermist system application is not covered by a recognized standardfire test, additional testing might be required to meet the requirements of theAHJ.1 ScopeThis part of BS 8489 gives recommendations for the design, installation,commissioning and maintenance of watermist systems.
49、 It gives performancecriteria for fixed watermist systems for specific industrial and commercialhazards, for both life safety and property protection.The British Standard excludes:a) applications and occupancies which are not covered by relevant fire testprotocols;b) watermist systems on ships, in aircraft, on vehicles and mobile fireappliances or for below ground systems in the mining industry;c) the use of watermist for explosion protection.NOTE BS 8458 covers water
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