BS 9990-2015 Non automatic fire-fighting systems in buildings Code of practice《建筑物内非自动灭火系统 实践规程》.pdf

1、BSI Standards PublicationBS 9990:2015Non-automatic fire-fightingsystems in buildings Code of practicePublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2015Published by BSI Standards Li

2、mited 2015ISBN 978 0 580 86738 5ICS 13.220.10The following BSI references relate to the work on this document:Committee reference FSH/14Draft for comment 14/30301827 DCPublication historyFirst published 2006Second (present edition), January 2015Amendments issued since publicationDate Text affectedBS

3、 9990:2015 BRITISH STANDARDContentsForeword ii1 Scope 12 Normative references 13 Terms and definitions 14 Fire mains 44.1 Design considerations 44.2 Provision and siting 64.3 Electrical earthing 75 Private fire hydrants 75.1 Design considerations 75.2 Provision and siting 76 Water supplies and pumpi

4、ng arrangements 86.1 Adequacy of basic supply 86.2 Supplementing the basic supply for wet fire mains 86.3 Pumps for wet fire mains 86.4 Additional precautions for wet fire mains 106.5 Emergency arrangements for filling suction tanks 116.6 Ring main supply 117 Installation, commissioning and maintena

5、nce 117.1 Work on site 117.2 Protection of buildings under construction 127.3 Initial inspections and acceptance tests 127.4 Maintenance of systems and rectification of defects 148 Signage 158.1 Identification of equipment 158.2 System information 16AnnexesAnnex A (normative) Protecting installed eq

6、uipment from theft andvandalism 17Bibliography 18Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv,pages 1 to 18, an inside back cover and a back cover.BRITISH STANDARD BS 9990:2015 The British Standards Institution 2015 iForewordPublishing informationThis B

7、ritish Standard is published by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 31 January 2015.It was prepared by Technical Committee FSH/14, Fire precautions in buildings.A list of organizations represented on this committee can be obtained onreq

8、uest to its secretary.SupersessionThis British Standard supersedes BS 9990:2006, which is withdrawn.Information about this documentThis is a full revision of the standard. The principal changes are to update therecommendations for: flow tests and pressures; rising and falling mains; pumps; maintenan

9、ce; shut-off pressures.It is important for the fire protection of a building to be considered as a whole.The provision of fire mains is an essential element of the fire protection systemsin large and complex buildings due to the difficulties in providing water suppliesat the point of use for fire-fi

10、ghting and search and rescue. It is essential thatthese systems be carefully maintained to ensure instant readiness whenrequired.Use of 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 andpa

11、rticular care should be taken to ensure that claims of compliance are notmisleading.Any user claiming compliance with this British Standard is expected to be able tojustify any course of action that deviates from its recommendations.Presentational conventionsThe provisions in this standard are prese

12、nted in roman (i.e. upright) type. Itsrecommendations 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 spel

13、lings, 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.

14、Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARDBS 9990:2015ii The British Standards Institution 2015Particular attention is drawn to the Water Supply (Water Fittings) Regulations1999 1, the Water Supply (Water Fittings) (Scotland) Byelaws 2014 2 and t

15、heWater Supply (Water Fittings) Regulations (Northern Ireland) 2009 3 in respectof requirements for any fire suppression system which conveys, or is likely toconvey, water supplied by a water undertaker or licensed water supplier.Attention is also drawn to legal requirements in respect of planning a

16、ndapproval, and to the need to consult with the appropriate bodies, which mightinclude the building control body, the water undertaker and the local fire andrescue service.BRITISH STANDARD BS 9990:2015 The British Standards Institution 2015 iiiBRITISH STANDARDBS 9990:2015This page deliberately left

17、blankiv The British Standards Institution 20151 ScopeThis British Standard gives recommendations for non-automatic fire-fightingsystems in buildings. It covers good practice in matters affecting the design,installation, testing and maintenance of such systems including wet and dryfire-fighting mains

18、.This British Standard does not cover hose reels, foam inlets, automatic foamsystems and portable fire-fighting equipment. These systems are coveredin BS EN 671-1, BS 5306-1, BS 5306-3, BS 5306-8 and BS EN 3-7.2 Normative referencesThe following documents, in whole or in part, are normatively refere

19、nced in thisdocument and are indispensable for its application. For dated references, onlythe edition cited applies. For undated references, the latest edition of thereferenced document (including any amendments) applies.BS 750, Specification for underground fire hydrants and surface box frames andc

20、oversBS 1710, Specification for identification of pipelines and servicesBS 5041 (all parts), Fire hydrant systems equipmentBS 6391, Specification for non-percolating layflat delivery hoses and hoseassemblies for fire fighting purposesBS 7430, Code of practice for protective earthing of electrical in

21、stallationsBS 7671, Requirements for electrical installations IET Wiring Regulations Seventeenth editionBS 8519, Selection and installation of fire-resistant power and control cablesystems for life safety and fire-fighting applications Code of practiceBS 9991, Fire safety in the design, management a

22、nd use of residential buildings Code of practiceBS 9999, Code of practice for fire safety in the design, management and use ofbuildingsBS EN 1092 (all parts), Flanges and their joints Circular flanges for pipes, valves,fittings and accessories, PN designatedBS EN 1515 (all parts), Flanges and their

23、joints BoltingBS EN 14339, Underground fire hydrantsBS EN 14384, Pillar fire hydrantsBS EN ISO 7010, Graphical symbols Safety colours and safety signs Registeredsafety signsBS ISO 3864-1, Graphical symbols Safety colours and safety signs Part 1: Design principles for safety signs and safety markings

24、3 Terms and definitionsFor the purposes of this British Standard, the following terms and definitionsapply.3.1 authority having jurisdiction (AHJ)organization, office or individual responsible for enforcing the requirements oflegislation or standards, or for approving equipment, materials, an instal

25、lation,or a procedureBRITISH STANDARD BS 9990:2015 The British Standards Institution 2015 13.2 bridgeheadpart of a building, usually two floors below the fire (floors above in the caseof basements), from which fire-fighting teams can be safely committed to attacka fire3.3 competent personperson, sui

26、tably trained and qualified by knowledge and practical experience,and provided with the necessary instructions, to enable the required task(s) tobe carried out correctly3.4 couplingdevice for connecting lengths of hose so as to secure continuity from the sourceof a water supply to the delivery point

27、3.5 depthdistance of the lowest point of the floor of the lowest storey of a building tothe fire service access level, measured at the centre of that face of the buildingwhere the distance is greatest3.6 fire-fighting lobbyprotected lobby provided within a fire-fighting shaft giving access from afir

28、e-fighting stair to an accommodation area, and normally to any associatedfire-fighting lift and fire mainNOTE Common corridors serving residential accommodation can be regarded asfire-fighting lobbies.3.7 fire-fighting shaftprotected enclosure containing a fire-fighting stair, fire-fighting lobbies,

29、 a firemain and, if provided, a fire-fighting lift together with any machinery space3.8 fire-fighting stairprotected stairway communicating with an accommodation area only through afire-fighting lobby3.9 fire hydrants3.9.1 fire hydrantassembly comprising a valve and outlet connection from a water su

30、pply3.9.2 pillar fire hydrantfire hydrant whose outlet connection is fitted to a vertical component projectingabove ground level3.9.3 underground fire hydrantfire hydrant contained in a pit or box below ground level3.10 fire mains3.10.1 fire mainwater supply pipe, fitted with an outlet and control v

31、alve at specified points,installed in a building for fire-fighting purposes3.10.2 dry fire mainwater supply pipe installed in a building for fire-fighting purposes, fitted withinlet connections at fire service access level and landing valves at specifiedpoints, which is normally dry but is capable o

32、f being charged with water usuallyby pumping from fire and rescue service appliancesBRITISH STANDARDBS 9990:20152 The British Standards Institution 20153.10.3 ring system fire mainwater main which encircles a building or series of buildings or other associatedfire risks and which feeds fire hydrants

33、, fire mains or other fire-fightingapparatus3.10.4 wet fire mainwater supply pipe installed in a building for fire-fighting purposes andpermanently charged with water from a pressurized supply, and fitted withlanding valves at specified points3.11 fire service access levellevel at which there is sui

34、table entry to the building and to a fire-fighting shaftfrom an area to which fire and rescue service appliances have access3.12 heightdistance of the surface of the highest point of the floor of the highest storey(excluding any such storey consisting exclusively of plant rooms) to the fireservice a

35、ccess level, measured at the centre of that face of the building wherethe distance is greatest3.13 hydrant outletcomponent of a fire hydrant to which a standpipe and/or hose is connected3.14 inlet connectionassembly comprising a valve and inlet to enable supply of water to a fire main3.15 K-valuecoe

36、fficient of discharge that is related to flow rate and pressure at thebranch/nozzleNOTE The K-value is calculated from:Q=KP1/2where:Q is the flow rate through the branch, in litres per minute (L/min);P is the pressure at the entry to the branch, in bar;1)K is the branch constant.3.16 landing valveas

37、sembly comprising a valve and outlet to enable connection of fire-fightinghose to a fire main3.17 mains water supplypermanent network of pipes that convey wholesome water from a public orprivate water supply system to a customer service connection or user draw-offpoint3.18 suction tanktank supplying

38、 inlet water to a fire pump3.19 water undertakercompany licensed to provide a public water supply3.20 wholesome waterwater suitable for human consumption1)1bar=105N/m2= 100 kPa.BRITISH STANDARD BS 9990:2015 The British Standards Institution 2015 34 Fire mains4.1 Design considerations4.1.1 GeneralThe

39、 fire strategy for a building might necessitate some deviations from therecommendations in this British Standard. If this is the case then this should bediscussed and agreed with the authority having jurisdiction and the local fireand rescue service.Fire mains should have a minimum nominal bore of 1

40、00 mm and the systemshould be designed to withstand a pressure of one and half times its predictedmaximum operating pressure.Isolating valves should be incorporated in the system at intervals notexceeding 10 m on vertical pipework so that sections of the fire main can beisolated to enable repairs to

41、 be carried out. In addition, where there is morethan one vertical main supplied from a horizontal wet main, valves should beinstalled on each vertical main below the first landing valve outlet. Such valvesshould be secured in the open position by a chain and padlock or incorporatedwithin a monitori

42、ng system to indicate when the valve is not fully open.Installed equipment should be protected against interference and attack bythieves and vandals as far as it is possible to do so without adversely affectingoperational capability. This should be done in accordance with Annex A.4.1.2 MaterialsFire

43、 mains and associated pipework and fittings should be of suitable heavyquality steel to meet the pressure, robustness and durability requirements of thesystem in question, including galvanizing where necessary.Pipework should be jointed by screwing and socketing, or by any other meansselected as sui

44、table for use, except at valves or other fittings where appropriateflanges in accordance with the relevant parts of BS EN 1092 and BS EN 1515 maybe used. Such means may be selected on the basis of practical tests and evidenceof satisfactory performance in similar applications such as wet or dry syst

45、emsprinkler installations.All changes in the direction of the run of the piping should be made withstandard bends, springs or long turn fittings. Elbows should not be used.4.1.3 Dry fire mains4.1.3.1 Design operating pressureDry fire mains should have an operating pressure of 12 bar.4.1.3.2 InletsA

46、dry fire main should be fitted with a two-way inlet breeching for 100 mmmains. Each breeching should conform to BS 5041-3. Such breeching should beaccommodated in an inlet box conforming to BS 5041-5, the box beingpositioned with its lower edge between 400 mm and 600 mm above groundlevel.Any propose

47、d use of floor-mounted inlets, or inlet cabinet doors integrated intothe building fabric, should be discussed and agreed with the local fire andrescue service.NOTE Floor-mounted (horizontal) inlets are not suitable for the majority of firemain applications.BRITISH STANDARDBS 9990:20154 The British S

48、tandards Institution 20154.1.3.3 Drain valvesInlet breechings should be fitted with a 25 mm drain valve, in accordancewith BS 5041-3, to facilitate draining the rising main after use.4.1.3.4 Air release valveAn air release valve should be installed at the top of all vertical mains in orderto vent ai

49、r from the main and to act as a vacuum break to allow drainage totake place.4.1.4 Wet fire mains4.1.4.1 Design operating pressureSystems should be designed such that maximum system pressures serving a firemain outlet do not exceed 20 bar.4.1.4.2 LocationWet rising mains should not be located against or near external walls unlessthey are adequately insulated or otherwise satisfactorily protected against frost(see BS EN 806-2).4.1.5 Landing valvesA landing valve should be provided at each floor level, including the groundfloor level, wher