1、BS 8489-7:2016Fixed fire protectionsystems Industrial andcommercial watermistsystemsPart 7: Fire performance tests andrequirements for watermist systemsfor the protection of low hazardoccupanciesBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Publishing and copyright
2、 informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2016Published by BSI Standards Limited 2016ISBN 978 0 580 85532 0ICS 13.220.01; 13.220.20The following BSI references relate to the work on this document:Comm
3、ittee reference FSH/18/5Draft for comment 14/30295822 DCPublication historyFirst published as DD 8489-7, February 2011First published as BS 8489-7, May 2016Amendments issued since publicationDate Text affectedBS 8489-7:2016 BRITISH STANDARDContentsForeword ii1 Scope 12 Normative references 13 Terms
4、and definitions 14 Apparatus 15 Test conditions 36 Principle 37 Procedure 48 Pass/fail criteria 8AnnexesAnnex A (normative) Test rooms 11Annex B (normative) Fuel packages 14Bibliography 23List of figuresFigure A.1 Test room A (small compartment) 12Figure A.2 Test room B (large compartment test room)
5、 and fuel package 2(corner crib and simulated furniture) for pendent and upright nozzles 13Figure B.1 Fuel package 1 (bunk beds) 15Figure B.2 Fuel package 2 (corner crib and simulated furniture) 17Figure B.3 Fuel package 3 (sofas) 18Figure B.4 Fuel package 4 (simulated work station) 20List of tables
6、Table B.1 Burning characteristics of foam mattress material 16Summary of pagesThis document comprises a front cover, an inside front cover, pages i to iv,pages 1 to 24, an inside back cover and a back cover.BRITISH STANDARD BS 8489-7:2016 The British Standards Institution 2016 iForewordPublishing in
7、formationThis 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, Watermist systems, under the authority ofTechnical Committee FSH/18, Fixed fire fighting systems. A
8、list of organizationsrepresented on these committees can be obtained on request to their secretary.SupersessionThis part of BS 8489 supersedes DD 8489-7:2011, which is withdrawn.Relationship with other publicationsBS 8489 is published in a series of parts: Part 1: Code of practice for design and ins
9、tallation; 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 ofcombustion turbines and machinery spaces with volumes up to andincluding 80 m3; Part 6: Tests and requirem
10、ents for watermist systems for the protection ofindustrial oil cookers; Part 7: Tests and requirements for watermist systems for the protection oflow hazard occupancies.BS 8489-7 is intended to be read in conjunction with BS 8489-1.Information about this documentThis document converts DD 8489-7 into
11、 a full British Standard and incorporatesminor technical updates.Third-party testing/certification. Users of this British Standard are advised toconsider the desirability of third-party testing/certification of conformity withthis British Standard.Use of this documentThis British Standard is intende
12、d for use by manufacturers, designers andinstallers of watermist systems, and for authorities having jurisdiction.It 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 h
13、as been produced.Presentational conventionsThe provisions of this standard are presented in roman (i.e. upright) type.Its methods are expressed as a set of instructions, a description, or in sentencesin which the principal auxiliary verb is “shall”. Its requirements are expressed insentences in whic
14、h the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.Where words have alternative spellings, the preferred spelling of the ShorterOxford English Dictionary is used (e.g. “org
15、anization” rather than“organisation”).BRITISH STANDARDBS 8489-7:2016ii The British Standards Institution 2016Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a
16、 British Standard cannot confer immunity from legalobligations.BRITISH STANDARD BS 8489-7:2016 The British Standards Institution 2016 iiiBRITISH STANDARDBS 8489-7:2016This page deliberately left blankiv The British Standards Institution 20161 ScopeThis part of BS 8489 describes tests and specifies r
17、equirements for industrial andcommercial watermist systems for the protection of low hazard occupancies asdefined in BS 8489-1.This part of BS 8489 is applicable to ceiling heights up to 5 m.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thisdocumen
18、t 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 476-7:1997, Fire tests on building materials and structures Part 7: Method oftest to determine
19、the classification of the surface spread of flame of productsBS 8489-1, Fixed fire protection systems Industrial and commercial watermistsystems Part 1: Code of practice for design and installationBS EN 12259-1, Fixed firefighting systems Components for sprinkler and waterspray systems Part 1: Sprin
20、klersBS EN ISO/IEC 17025:2005, General requirements for the competence of testingand calibration laboratoriesISO 5660-1, Reaction-to-fire tests Heat release, smoke production and mass lossrate Part 1: Heat release rate (cone calorimeter method)3 Terms and definitionsFor the purposes of this part of
21、BS 8489, the terms and definitions given inBS 8489-1 and the following apply.3.1 category I systemsystem that covers rooms up to and including 37 m2containing low hazard fireloads3.2 category II systemsystem that covers rooms above 37 m2containing low hazard fire loads3.3 category III systemsystem t
22、hat covers rooms containing low hazard fire loads3.4 low hazard occupancynon-storage, non-manufacturing occupancy where the quantity and/orcombustibility of the content is low and fires with relatively low rates of heatrelease are expected, with maximum fuel loads and obstructions as indicatedin 4.7
23、 to 4.104 ApparatusNOTE Unless otherwise stated, the following tolerances apply: length: 2%; volume: 5%; pressure: 3%; temperature: 5%.BRITISH STANDARD BS 8489-7:2016 The British Standards Institution 2016 14.1 Test hall of appropriate size to accommodate the largest test area (4.5), withnatural or
24、minimal ventilation that will not interfere with the fire testing withinthe enclosure or test rig.4.2 Watermist system comprising nozzles, piping, control valves and watersupplies. The individual nozzles shall be automatic and shall include either afusible or a glass bulb assembly which meets BS EN
25、12259-1 quick responsecriteria. The nominal operating temperature of the nozzle shall notexceed 107 C. The system shall be configured in accordance with themanufacturers design manual and the test conditions specified in Clause 5.4.3 Test room A (small compartment), as specified in Annex A.4.4 Test
26、room B (large compartment), as specified in Annex A.4.5 Test area C (open space), as specified in Annex A.4.6 Test area D (simulated work station), as specified in Annex A.4.7 Fuel package 1 (bunk beds), as specified in Annex B.4.8 Fuel package 2 (corner crib and simulated furniture), as specified i
27、n Annex B.4.9 Fuel package 3 (sofas), as specified in Annex B.4.10 Fuel package 4 (simulated work station), as specified in Annex B.4.11 Igniter, consisting of porous material (e.g. pieces of insulatingfibreboard), 75 mm in length, and either oblong with a depth and heightof 60 mm or cylindrical wit
28、h a diameter of 75 mm.4.12 Heptane.4.13 White spirit.4.14 Thermocouples, suitable for measuring ceiling surface temperatures, whichshall be fabricated from Chromel-alumel (Type K) thermocouple wires notexceeding 0.5 mm diameter welded together. In each test room, onethermocouple shall be embedded wi
29、thin the ceiling tiles, such that thethermocouple bead is located 6.5 mm above the bottom surface of the ceiling,and a second thermocouple shall be located 76 mm below the ceiling surface. Toprevent water impingement from affecting thermocouple measurements,thermocouples subject to watermist shall b
30、e protected with a shield which islarge enough to cover the thermocouple ends. The shield shall be made frommetallic tape which is formed into an umbrella shape and attached to the wireabove each thermocouple end.4.15 Instrumentation to measure and record the following parameters, asappropriate to t
31、he type of test: test enclosure temperatures; extinguishing agent flow and pressure in the extinguishing system; water supply pressure (including tank pressure if applicable) and nozzledischarge pressures; extinguishing agent pressure at the most remote nozzle branch line; gas pressure at its storag
32、e outlet and distribution sources; oxygen, carbon monoxide and carbon dioxide concentrations;BRITISH STANDARDBS 8489-7:20162 The British Standards Institution 2016 consumption of foam concentrate or other additive, recorded by means of aload cell on which the concentrate/additive tank is placed duri
33、ng the tests; gas consumption, measured by means of pressure or load cell on which thegas tank is placed during the tests, or mass flow measurement.4.16 Additional baffles or obstructions, if needed, to prevent the direct impactof mist on the fire.4.17 Stopwatch.5 Test conditions5.1 The maximum nozz
34、le spacing (as specified by the manufacturer) shall beused for all tests except the small compartment test with bunk beds (see 7.2).This includes utilizing the maximum ceiling spacing of nozzles from walls.5.2 Corridor nozzles for the small compartment test with bunk beds (see 7.2)shall be installed
35、 at the maximum spacing as specified by the manufacturer, atan equal distance from the centreline of the small compartment doorway.5.3 A target, automatic closed nozzle, with a thermosensitive component ratingequal to the four nozzles installed in the enclosure, shall be located in the twoexit doorw
36、ays (see A.2), to determine potential operation of these nozzles. Forupright and pendent nozzles, the target nozzles shall be installed 102 mm insidethe doorway, in the pendent position, such that the centre of the heatresponsive element is 51 mm below the ceiling.5.4 The heat responsive element and
37、 temperature rating of the nozzles used inall fire tests shall be identical.5.5 For all fire tests, the system shall be either:a) pressurized to the minimum operating pressure specified by themanufacturer. Following activation of the first nozzle, the flowing waterpressure shall be maintained at the
38、 minimum system operating pressure; orb) pressurized to the minimum stand-by pressure specified by themanufacturer. Following activation of the first nozzle, the flowing waterpressure shall be gradually increased to the minimum system operatingpressure specified by the manufacturer. The delay time u
39、ntil the minimumsystem operating pressure is reached shall correspond to the delay timeexpected in an actual installation. The delay time recorded during the testsshall be documented and included in the system specifications.5.6 The air in the test enclosure shall be conditioned to an ambient temper
40、atureof (15 10) C, measured with the thermocouple located 76 mm below theceiling.5.7 The fuel load materials for the category III test shall be conditioned atnormal room temperature (20 10) C for a period of seven days prior to testingcommencing. The wood crib sticks shall have a moisture content be
41、tween 9%and 13%.6 PrincipleThe low hazard occupancy tests comprise small, large and open compartments,plus open plan office simulations. The watermist system needs to pass all thetests for the category(ies) for which it is to be used.BRITISH STANDARD BS 8489-7:2016 The British Standards Institution
42、2016 37 Procedure7.1 General7.1.1 The following individual tests shall be conducted:a) for category I systems:1) small compartment with bunk beds (7.2);b) for category II systems:1) large compartment with corner crib and simulated furniture up tomaximum coverage of four nozzles (7.3);2) open space w
43、ith sofas under one nozzle (7.4);3) open space with sofas between two nozzles (7.5);4) open space with sofas between four nozzles (7.6);c) for category III systems:1) open space with simulated work station under one nozzle (7.7);2) open space with simulated work station between two nozzles (7.8);3)
44、open space with simulated work station between four nozzles (7.9).7.1.2 System components, component locations, operating conditions and testenclosure details shall remain unaltered throughout all of the fire tests for agiven application. During each test, all systems shall operate without manualint
45、ervention. All tests shall be conducted using the specifications from themanufacturers design and installation manual with regard to nozzle placement,spray flux, and spray duration.7.1.3 Prior to the start of each test:a) the igniter (4.11) shall be soaked in 120 mL of heptane (see 4.12) for thecate
46、gory I and II tests (see 7.2 to 7.6) and 120 mL of white spirit (see 4.13)for the category III test (see 7.7 to 7.9);b) the room shall be dried and all water from previous testing shall beremoved;c) there shall be no visible water on the floor, ceiling or walls.7.1.4 The category I and II tests (see
47、 7.2 to 7.6) shall be conducted for 10 minafter the activation of the first nozzle. The category III tests (see 7.7 to 7.9) shallbe conducted for 30 min after the activation of the first nozzle. After thisperiod, any remaining fire shall be extinguished manually.7.1.5 During each test, the following
48、 temperatures shall be measuredcontinuously, at least every 2 s, throughout the tests:a) the embedded ceiling surface temperature above the ignition source in theroom, with the thermocouple bead 6.5 mm above the bottom surface of theceiling;b) the ceiling gas temperature, with a thermocouple (75 1)
49、mm below theceiling in the centre of the room;c) the ceiling surface temperature in the centre of the corridor, directlyopposite the doorway, with a thermocouple embedded in the ceilingmaterial such that the thermocouple bead is 6.5 mm above the bottomsurface of the ceiling;d) the ceiling gas temperature, with a thermocouple (75 1) mm below theceiling in the centre of the corridor directly opposite the doorway;BRITISH STANDARDBS 8489-7:20164 The British Standards Institution 2016e) for the category III t
