1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21980-2 SANS 13592:2008 Edition 1 ISO 13592:1998 Edition 1SOUTH AFRICAN NATIONAL STANDARD Small craft Backfire flame control for petrol en
4、gines This national standard is the identical implementation of ISO 13592:1998, and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12
5、344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 13592:2008 Edition 1 ISO 13592:1998 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Commit
6、tee SABS TC 188, Small craft, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS
7、.A Referencenumbe r ISO13592:1998 (E) INTERNATIONAL STANDARD ISO 13592 Firstedition 19980415 SmallcraftBackfireflamecontrolfor petrolengines NaviresdeplaisanceAntiretourdeflammepourmoteursessence SANS 13592:2008This standard may only be used and printed by approved subscription and freemailing clien
8、ts of the SABS.ISO13592:1998(E) ISO1998 Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproduced orutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingand microfilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization
9、Casepostale56 CH1211Genve20 Switzerland Internet centraliso.ch X.400 c=ch;a=400net;p=iso;o=isocs;s=central PrintedinSwitzerland ii Contents Page 1 Scope. 1 2 Normativereference 1 3 Generalrequirements 1 4 Testing 2 5 Physicalexamination 2 6 Testprocedure. 2 7 Marking 6 8 Engineoperationmanual 6 SANS
10、 13592:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO ISO13592:1998(E) iii Foreword ISO(theInternationalOrganizationforStandardization)isaworldwide federationofnationalstandardsbodies(ISOmemberbodies).Theworkof preparingInternationalSt
11、andardsisnormallycarriedoutthroughISO technicalcommittees.Eachmemberbodyinterestedinasubjectforwhich atechnicalcommitteehasbeenestablishedhastherighttoberepresented onthatcommittee.Internationalorganizations,governmentalandnon governmental,inliaisonwithISO,alsotakepartinthework.ISO collaboratesclose
12、lywiththeInternationalElectrotechnicalCommission (IEC)onallmattersofelectrotechnicalstandardization. DraftInternationalStandardsadoptedbythetechnicalcommitteesare circulatedtothememberbodiesforvoting.PublicationasanInternational Standardrequiresapprovalbyatleast75%ofthememberbodiescasting avote. Int
13、ernationalStandardISO13592waspreparedbyTechnicalCommittee ISO/TC188, Smallcraft . SANS 13592:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 13592:2008This standard may only be used and printed by approved subscription and freemailing
14、clients of the SABS.INTERNATIONALSTANDARD ISO ISO13592:1998(E) 1 SmallcraftBackfireflamecontrolforpetrolengines 1Scope ThisInternationalStandardspecifiestheminimumrequirementsforconstructionandtestingofenginesanddevices topreventthepropagationofbackfireflamesfrompermanentlyinstalledinboardpetrolengi
15、nestothesurrounding atmosphereinsmallcraftoflengthofthehulluptoandincluding24m. 2Normativereference Thefollowingnormativedocumentcontainsprovisionswhich,throughreferenceinthistext,constituteprovisionsof thisInternationalStandard.Fordatedreferences,subsequentamendmentsto,orrevisionsof,thispublication
16、do notapply.However,partiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigatethe possibilityofapplyingthemostrecenteditionofthenormativedocumentindicatedbelow.Forundatedreferences, thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIECmaintainregistersof curre
17、ntlyvalidInternationalStandards. ISO9227:1990, CorrosiontestsinartificialatmospheresSaltspraytests . 3Generalrequirements 3.1 Petrolenginesshallbedesignedtoprevent,orbeequippedwithadevicetoprevent,thepropagationof backfireflamefromwithintheengineairintakesystemtothesurroundingatmosphere. 3.2Wherebac
18、kfireflamepropagationispreventedbymeansofaflamearresterconsistingofoneormore componentparts,thisdeviceshall a) provideaccessforinspectionandcleaning; b) havenoopeningsinthearresteroritsconnectiontotheairinductionsystemthroughwhichabackfireflamecan pass; c) beconstructedsothatcomponentpartscannotbemi
19、salignedduringassemblyorinstallationtoanextentthat willimpairitseffectiveness; d) includeapermanentandprominentmeansofidentificationasdescribedinclause7; e)providemeansofsecurelyfasteningboththeflamearrestertotheairintakeandthecomponentpartstoeach other.Whenclampsareused,theyshallbeaffixedtooneofthe
20、majorcomponentpartsinsuchamannerthat theycannotbeeasilyremoved,andnospringsshallbeusedforthepurposeofclamping. SANS 13592:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO13592:1998(E) ISO 2 3.3 Aflamearresteradapter,ifrequired,shall a) p
21、rovidefordirectattachmenttotheairinductionsystem; b) beattachedpermanentlytotheflamearrester.Examplesofpermanentattachmentwouldbebond,weld,rivetor threadedfastenerwiththreadupsetafterassembly.Noloosepiecesshallbeusedbetweentheflamearrester andtheengineairinletthatcouldbeleftout. 3.4Foreachdesignofan
22、engineincorporatingabackfireflamecontrol,theairandfuelinductionsystemshallbe capableofmeetingtherequirementsinthisInternationalStandard. Whereaparticulardesignoftheengineairandfuelinductionsystemconsistsofvariationssothatitmaybeut ilized insimilarenginesofaparticularmanufacturer,thesevariationsshall
23、alsobeinconformitywiththerequirementsof thisInternationalStandard. Achangeinthedesignorconstructionofanengineairandfuelinductionsystemthatwascapableofcomplying withtheserequirementsshallbereevaluatedandretestedwhenappropriate. 4Testing 4.1Eachdesignoftheflamearrestershallbetestedtodetermineconformit
24、ywiththisInternationalStandard. 4.2 Whereaparticulardesignconsistsofvariouscombinationsofparts,threesampleassembliesneedtobe tested;theyshallberepresentativeoftheflamearrestingperformanceofthecrosssectionofassembliesofthe design. 4.3 Thetestofthesamplesrepresentativeofeachdesignshallconclusivelyindi
25、catethat,whensuchbackfire flamearrestersaresubjectedtothetestproceduresof6.1to6.4,thedesignpreventspropagationofthebackfire flametothesurroundingatmospherewithoutfailure,damageorpermanentdeformation. 4.4 Achangeinthedesignorconstructionofanarresterthathaspassedtestsasspecifiedin6.1to6.4requires that
26、thearresterberetestedifthechangecannotbeconsideredandacceptedunder4.2. 5Physicalexamination Thebackfireflamearresterassemblytogetherwithastockcarburettordesignedtobeused,ortheengineairand fuelinductionsystem,shallbeexaminedforcompliancewiththefollowingrequirementsofthisInternational Standard. 5.1 In
27、spectallsubmittedsamplesforevidenceofimperfectionsandconsistencywithproductiondrawings. 5.2Inspecttheassemblytoconfirmthattheflamearresterorinductionsystemcanbeinspectedandcleanedin service. 5.3 Inspecttheassemblyasinstalledfortheexistenceofanypossiblebypassopenings,suchasfastenersand joints. 5.4 Ve
28、rifythatthefastenersoftheassemblyarepermanentlysecured. 5.5 Verifythatthecomponentpartscanonlybeassembledproperly,andwithoutmisalignment,ontheengine. 6Testprocedure Thedevicesorsystemsshallwithstandtheeffectsofeachofthefollowingtestswithoutfailure. NOTEAnewitemmaybeusedforeachtest. SANS 13592:2008Th
29、is standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO ISO13592:1998(E) 3 6.1Vibrationtest Thebackfireflamearresterorsystemassemblyusedforthistestshallbemountedonastockcarburettoror inductionsystem,orsimulatedcarburettororinductionsystem,forthetypeo
30、fassemblyusedinservicesecuredby arigidadapterdirectlytothesurfaceofthevibrationtableinitsnormaloperatingposition. Thecarburettorandbackfireflamearresterassemblyorinductionsystemshallbesubjectto24hofvibration,with 8hineachofthe x,yandzplanes,atapeaktopeakamplitudeof1,00mm1,05mm.Thetestsetupshallbe au
31、tomaticallycycledatagraduallyincreasedanddecreasedratebetween10Hzand60Hzeveryfourminutes. 6.2Shocktest Thesetupusedforthevibrationtestshallbeusedforthistestincludingthetestfixture,carburettorandbackfire flamearresterassemblyorinductionsystem. Securelymountthesetuptothesurfaceofashockmachine. Subject
32、itto5000verticalimpactsof98m/s(10g),havingashockdurationof20ms 2msmeasuredatthe zeroreferencelineofahalfsineshockpulse. 6.3Explosiontest Thebackfireflamearresterassemblyandcarburettorortheengineairandfuelinductionsystemusedforthe vibrationandshocktestsshallbeusedforthistestandbesubjectedto50testrepe
33、titions. Thebackfireflamearresterassemblyorinductionsystemshallbeattachedtotheteststandasshowninfigure1in amannersimulatinganormalinstallation.Anenginemaybeusedinplaceofthelowerchamberoftheteststand fortestinginductionsystems.Priortothetests,thecarburettororinductionsystemshallbecarefullycheckedfor
34、anyopeningsthatcouldpermitflamepassage,andallthrottleandchokebutterfliesshallbelockedinthefullopen position.Othercarburettororinductionsystemopenings,suchasfuelline,vacuumadvanceconnections,etc.,shall besealed. Whereprovisionsaremadeonthebackfireflamearresterassemblyorinductionsystemfortheconnection
35、of oilbreathertubing,suchlinesshallbeleftdisconnectedduringthetests. Usingwhateveradaptermayberequired,thecarburettorwiththeattachedbackfireflamearresterassemblyorthe inductionsystemshallbesecureddirectlytotheupperendofachamber,tobereferredtoasthelowerchamber withaninternalboreof50mm 2mmandalengthof
36、600mm 10mmaccordingtofigure1. Thelowerchambershallbeclosedatthelowerend(seefigure1). Themethodofattachmentbetweentheflamearresterandthecarburettororinductionsystemshallbein accordancewiththemanufacturersrequirements.Thecarburettororinductionsystemshallbedirectlyandfully opentothelowerchamber,withnor
37、estrictiontogasflow.Forevaluationofinductionsystems,anenginecanbe usedinplaceofthelowerchamber,withalterationstointroducethecombustiblemixtureandignitionsource. 6.3.1Inaccordancewithfigure1,aprovisionshallbemadeatthebaseofthelowerchambersfortheintroduction ofapremixedpropanegas/airmixture.Themixingo
38、fthepropaneandairshallnotbeaccomplishedwithinthe chamber. Thepropane/airexplosivemixtureusedforthesetestsshallbegeneratedthroughtheuseofflowmetersanda suitablepremixingchamber,designedandarrangedsothatacontrolledhomogenousexplosivemixtureisfedupto thelowerchamberforaflamearresterandtotheupperandlowe
39、rchambersforanairinductionsystemduringall tests.Asuitablecontrolvalveshallbeprovidedatthegas/airinletfittingtopermitimmediateextinguishingofthe mixture,shoulditcontinuetoburnafterignition.Flamearrestersshallbeprovidedinallconnectingfittingsbetween theexplosionchamberandmixingchambertopreventeffectiv
40、eflamepropagationthroughthelinestothemixing chamber. SANS 13592:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO13592:1998(E) ISO 4 Dimensionsinmillimetres Key 1 Carburettororinductionsystem 2 Hingedcoverorrubberflap 3 Flamearrester 4 Up
41、perchamber 5 Sparkplug 6 Staticpressuretransducer 7 Gassamplingconnectionsforgas/airratiometer 8 Lowerchamber(ironpipe) 9 Shutoffvalve 10 Gas/airfeedfrommixingchamber(forairinductionsystems) 11 Sparkplug(2required) Figure1Explosiontestapparatus SANS 13592:2008This standard may only be used and print
42、ed by approved subscription and freemailing clients of the SABS.ISO ISO13592:1998(E) 5 6.3.2Twosparkplugs,setwithagapof0,7mm0,8mm,shallbeprovidedatthebaseofthelowerchamber directlyadjacenttothegas/airinletfitting.Adualignitionsystemcapableofsimultaneouslyfiringbothsparkplugs withaminimumpeakvoltageo
43、f25000Vshallbeprovided. Asimilarsparkplugshallbeprovidedintheupperchamber. 6.3.3Anupperchamberwithaminimumvolumeof25Lshallbeprovidedaroundtheflamearresterorengineair andfuelinductionsystemduringallthetests. Atleastonesideoftheupperchambershallbemadeoftransparentplastictopermitgoodobservationofthe backfireflamearresterassemblyorinductionsystematthetimeofignition. Ahingedcoverorflexibleflapshallbeinstalledatthetopoftheupperchambertoprovidepressurerelief(see figure1). 6.3.4Theinstrumentationshallincludethefollowing: a) gasanalyserformonitoringthepropane
