BS 8489-5-2016 Fixed fire protection systems Industrial and commercial watermist systems Part 5 Fire performance tests and requirements for watermist systems for the protection of .pdf

1、BS 8489-5:2016Fixed fire protectionsystems Industrial andcommercial watermistsystemsPart 5: Fire performance tests andrequirements for watermist systemsfor the protection of combustionturbines and machinery spaces withvolumes up to and including 80 m3BSI Standards PublicationWB11885_BSI_StandardCovs

2、_2013_AW.indd 1 15/05/2013 15:06Publishing and copyright 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 85530 6ICS 13.220.20The following BSI refere

3、nces relate to the work on this document:Committee reference FSH/18/5Draft for comment 14/30295818 DCPublication historyFirst published as DD 8489-5, February 2011First published as BS 8489-5, May 2016Amendments issued since publicationDate Text affectedBS 8489-5:2016 BRITISH STANDARDContentsForewor

4、d ii1 Scope 12 Normative references 13 Terms and definitions 14 Apparatus 15 Test conditions 36 Principle 47 Procedure 58 Pass/fail criteria 9AnnexesAnnex A (normative) Combustion turbine test rig 10Bibliography 14List of figuresFigure A.1 Test enclosure and combustion turbine simulator steel plate

5、11Figure A.2 Fire source configuration and instrumentation for shielded sprayfire testing 12Figure A.3 Fire source configuration and instrumentation for shielded pool firetesting 13List of tablesTable 1 Characteristics of oil burners for tests involving spray fires 2Summary of pagesThis document com

6、prises a front cover, an inside front cover, pages i to iv,pages 1 to 14, an inside back cover and a back cover.BRITISH STANDARD BS 8489-5:2016 The British Standards Institution 2016 iForewordPublishing informationThis part of BS 8489 is published by BSI Standards Limited, under licence fromThe Brit

7、ish 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 list of organizationsrepresented on these committees can be obtained on request to their secret

8、ary.SupersessionThis part of BS 8489 supersedes DD 8489-5:2011, which is withdrawn.Relationship with other publicationsBS 8489 is published in a series of parts: Part 1: Code of practice for design and installation; Part 4: Tests and requirements for watermist systems for local applicationsinvolving

9、 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 requirements for watermist systems for the protection ofindustrial oil cookers; Part 7: Tests and requi

10、rements for watermist systems for the protection oflow hazard occupancies.BS 8489-5 is intended to be read in conjunction with BS 8489-1.Information about this documentThis document converts DD 8489-5 into a full British Standard.Third-party testing/certification. Users of this British Standard are

11、advised toconsider the desirability of third-party testing/certification of conformity withthis British Standard.Use of this documentThis British Standard is intended for use by manufacturers, designers andinstallers of watermist systems, and for authorities having jurisdiction.It has been assumed i

12、n 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 of this standard are presented in roman (i.e. upright) type.Its methods are e

13、xpressed as a set of instructions, a description, or in sentencesin which the principal auxiliary verb is “shall”. Its requirements are expressed insentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented insmaller italic type,

14、and does not constitute a normative element.Where words have alternative spellings, the preferred spelling of the ShorterOxford English Dictionary is used (e.g. “organization” rather than“organisation”).BRITISH STANDARDBS 8489-5:2016ii The British Standards Institution 2016Contractual and legal cons

15、iderationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legalobligations.BRITISH STANDARD BS 8489-5:2016 The British Standards Institution 2016 i

16、iiBRITISH STANDARDBS 8489-5:2016This page deliberately left blankiv The British Standards Institution 20161 ScopeThis part of BS 8489 describes tests and specifies requirements for industrial andcommercial watermist systems for the protection of combustion turbines andmachinery spaces with volumes u

17、p to and including 80 m3.This part of BS 8489 is applicable to rooms with machinery such as oil pumps, oiltanks, fuel filters, generators, transformer vaults, gear boxes, drive shafts, andlubrication skids, diesel engine driven generators, and other similar machineryusing fuel and/or lubrication flu

18、ids with volatilities less than or equal to diesel(e.g. Kerosine).It is not applicable to enclosures with equipment using fuel and/or lubricationfluids with volatilities greater than those of diesel.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in thi

19、sdocument 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.ASTM A36, Standard specification for carbon structural steel1)BS 8489-1, Fixed fire protec

20、tion systems Industrial and commercial watermistsystems Part 1: Code of practice for design and installationBS EN ISO/IEC 17025:2005, General requirements for the competence of testingand calibration laboratories3 Terms and definitionsFor the purposes of this part of BS 8489, the terms and definitio

21、ns givenin BS 8489-1 apply.4 ApparatusNOTE Unless otherwise stated, the following tolerances apply: length: 2%; volume: 5%; pressure: 3%; temperature: 5%.4.1 Test hall, constructed of wood or metal frame with an inner lining ofminimum 13 mm gypsum or 0.7 mm galvanized steel, and with main dimensions

22、of 5.6 m 3.6 m 3.9 m high. To minimize leakages, all joints and gaps shall besealed. In one of the shorter walls, at the junction of a longer wall, a 0.81 m 2.03 m high personnel door shall be installed with a locking mechanism. At leasttwo hinged ceiling hatches measuring nominally 0.91 m 1.83 m sh

23、all beinstalled in opposite diagonal corners for heat and smoke release after theconclusion of the test.NOTE A small louvered vent may be provided to allow intake of air to preventexcessive suctioning of the walls and ceiling and to maintain structural integrity ofthe fire enclosure.1)Published by A

24、STM International, 100 Barr Harbor Drive, PO Box C700, WestConshohocken, PA, 194282959 USA.BRITISH STANDARD BS 8489-5:2016 The British Standards Institution 2016 14.2 Watermist system comprising nozzles, piping, control valves and watersupplies, configured in accordance with the manufacturers design

25、 manual andwith the test conditions specified in Clause 5.4.3 Two test pools, one each of sizes1m1mand0.1m0.1m,eachcomprising a square pan or tray, of steel construction, 1.73 mm thick and100 mm high with no lip, with smooth surfaces and edges that are free fromimperfections, containing a water base

26、 of 50 mm in height, with a fuel load ofat least 20 mm above the water. The fuel used in the test pools shall be diesel.After each pool fire test, the fuel left in the pool or tray shall be reignited toensure that sufficient fuel remains in the pan.4.4 Conventional oil burner, with the characteristi

27、cs for nominal heat releaserates of 1 MW and 2 MW, as specified in Table 1. The fuel used shall be diesel.4.5 Insulation mat, composed of mineral wool, 0.1 m2in size, saturated withdiesel fuel and placed in a 0.1 m2pan (4.3). The mat shall be located below thesteel plate, between the baffles located

28、 at the far end of the steel plate awayfrom the access door. The tray shall be placed so that it is centred betweenbaffles, with the edge of the table.NOTE When slightly depressing the mat, a liquid fuel pool should occur.4.6 Insulation mat, composed of mineral wool, 1 m2in size, saturated with dies

29、elfuel and placed ina1m2pan (4.3). The mat shall be centred below the steelplate, located between the baffles, with the baffles located 500 mm from thefar end of the steel plate away from the access door.NOTE When slightly depressing the mat, a liquid fuel pool should occur.4.7 Combustion turbine te

30、st rig, as specified in Annex A.4.8 Fixture stand, which shall be a free-standing secure arrangement,constructed of metal, with the oil burner nozzle mounted within and centred atthe closed end of a metal cylindrical flame stabilizer measuring 150 mmdiameter 75 mm with a thickness of 0.25 mm.4.9 The

31、rmocouples, which shall be located (25 2) mm above the initial poolsurface and (250 10) mm within the pool rim, and in front of the spray fires,capable of registering extinguishment.NOTE In addition to thermocouples, thermal imaging equipment is recommended.Table 1 Characteristics of oil burners for

32、 tests involving spray firesFire type SpraynozzleA)Fuel type Nominal oilpressureFuel flow Fuel temp. Nominal heatrelease ratebarB)L/h C MWLow pressure,low flowMonarchmodelF80-24Light diesel 8.6 106 20 10 1.0Low pressure MonarchmodelF80-50Light diesel 8.6 212 20 10 2.0A)Monarch F80-24 and Monarch F80

33、-50 are trade marks owned by Monarch Nozzles, 500 Pedricktown Road,Swedesboro, NJ 08085, USA. These are trade names of products available in the UK. This information is given forthe convenience of users of this part of BS 8489 and does not constitute an endorsement by BSI of the productsnamed. Equiv

34、alent products may be used if they can be shown to lead to the same results.B)1bar=105N/m2= 100 kPa.BRITISH STANDARDBS 8489-5:20162 The British Standards Institution 20164.10 Instrumentation to measure and record the following parameters, asappropriate to the type of test: fuel pressure and flow at

35、the outlet of the fuel pump; fuel temperature within the fuel storage container; temperature of fuel in pools; test enclosure temperatures; temperature of air in spray fires; pool fire flame temperatures; spray fire flame temperatures; extinguishing agent flow and pressure in the extinguishing syste

36、m; 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 storage outlet and distribution sources; oxygen, carbon monoxide, and carbon dioxide concentrations; consumption of

37、foam concentrate or other additive, recorded by means of aload cell on which the concentrate/additive tank is placed during the tests; gas consumption (gas used to drive water from cylinders supplying thewatermist system), measured by means of pressure or load cell on which thegas tank is placed dur

38、ing the tests, or mass flow measurement.4.11 Additional baffles or obstructions, if needed, to prevent the direct impactof mist on the spray fire.4.12 Stopwatch.5 Test conditions5.1 The minimum operating nozzle pressure (as specified by the manufacturer)shall be used for all tests. System operating

39、pressures shall be maintained towithin 5%. For decaying pressure systems, the starting pressure shall bewithin 5% of the manufacturers designated starting pressure. For systemsdesigned to cycle between two pressure limits, both the higher and lowerpressures shall be within 5% of the manufacturers de

40、signated pressures, andthe periods pertaining to the higher and lower pressure in each cycle shall bewithin 3 s of the manufacturers designated duration.5.2 The maximum ceiling height, maximum nozzle height and maximum nozzlespacing (as specified by the manufacturer) shall be used for all tests. Thi

41、sincludes utilizing the maximum ceiling spacing of nozzles from walls.5.3 The nozzle arrangement shall have uniform spacing. The nozzle spacingfrom the wall shall be uniform.NOTE The nozzle spacing from the wall should preferably be one half the mainspacing.5.4 For all fire tests, the ceiling, floor

42、 and walls shall be dry. The relativehumidity in the test enclosure prior to the start of the test shall not differ fromthat of the ambient relative humidity by more than 20%.5.5 All fuels shall be at an ambient temperature of (20 10) C, measured withthe thermocouple located in the approximate centr

43、e of the initial fuel layer.BRITISH STANDARD BS 8489-5:2016 The British Standards Institution 2016 35.6 The test hall shall have an ambient temperature of (20 10) C prior to thestart of the test, measured in the central area of the test hall at one-third,two-thirds and ceiling heights. The test hall

44、 shall be at as uniform an ambienttemperature as reasonably practicable, with no localized hot or cold spots.All non-fire-induced draughts shall be eliminated.5.7 Test rig temperatures shall be measured away from the direct flameimpingement, except where otherwise stated in Annex A, with bare beadth

45、ermocouples welded from 28 gauge Chromel-alumel wire (Type K).5.8 The extinguishing agent flow and pressure in the extinguishing system shallbe measured continuously on the high pressure side of the pump, cylinder orequivalent equipment.5.9 The water supply and nozzle discharge pressures shall be mo

46、nitored at thesource (pump and/or cylinder) and at the distribution piping manifold.5.10 The oxygen, carbon monoxide, and carbon dioxide concentrations shall bemeasured at mid-room height, (500 25) mm horizontally behind the fuel spraynozzle or away from the pool, and away from any open door or vent

47、ilationsource. Oxygen levels shall be not less than 15% during the entire period ofeach test.5.11 For the shielded 1 m2diesel pool fire test (7.2), the fire shall be centredbelow the steel plate and located between the baffles, with the baffles located500 mm from the far end of the steel plate away

48、from the access door.5.12 For the unshielded 1 MW diesel spray fire test (7.3), the fire shall be locatedabove the plate, positioned in the location with the lowest flux density. The fuelnozzle shall be located 0.305 m to 1.676 m above the table at the baffle end,away from the access door, with the

49、fire directed towards the centre of theshorter wall with the access door.5.13 For the shielded diesel spray fire tests (7.4 and 7.5), the fire shall belocated 500 mm above the floor, centred between the baffles, away from theaccess door, underneath the test plate with the fuel spray nozzle aimedhorizontally. The fire shall be directed towards the centre of the shorter wallwith the access door.5.14 For the saturated insulation mat and spray fire test (7.6), the fire shall becentred below the steel