1、BSENISO29461-4:2025AirintakefilterSyStemSforrotarymachineryPart4:Testmethodsforstaticfiltersystemsincoastalandoffshoreenvironmentsbsi.NationalforewordThisBritishStandardistheUKimplementationofENISO29461-4:2025.ItisidenticaltoISO29461-4:2025.TheUKparticipationinitspreparationwasentrustedtoTechnicalCo
2、mmitteeMCE/21,Filtersforgasesandliquids.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.ContractualandlegalconsiderationsThispublicationhasbeenpreparedingoodfaith,howevernorepresentation,warranty,assuranceorundertaking(expressorimplied)isorwillbemade,andnore
3、sponsibilityorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessorreasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.Thispublicationisprovidedasis,andistobeusedattherecipientsownrisk.Therecipientisad
4、visedtoconsiderseekingprofessionalguidancewithrespecttoitsuseofthispublication.Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.TheBritishStandardsInstitution2025PublishedbyBSIStandardsLimited2025ISBN9780539172355ICS29.160.99CompliancewithaBritishStandard
5、cannotconferimmunityfromlegalobligations.ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30April2025.Amendments/corrigendaissuedsincepublicationDateTextaffectedEUROPEANSTANDARD29461-4NORMEEUROPEENNEEuropaischenormICS29.160.99April2025EnglishVersionAirintakef
6、iltersystemsforrotarymachinery-Part4:Testmethodsforstaticfiltersystemsincoastalandoffshoreenvironments(ISO29461-4:2025)Systemesdefiltrationdairdadmissionpourmachinestournantes-Partie4:MethodesdessaidessystemesdefiltrationStatiqueenmilieucotieretoffshore(ISO29461-4:2025)AnsaugfiltersystemevonRotation
7、smaschinen-Priifverfahren-Teil4:PriifverfahrenfurStatischeFiltersystemeinMeeres-undOffshore-Umgebungen(ISO29461-4:2025)ThisEuropeanStandardwasapprovedbyCENon28March2025.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofa
8、nationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslati
9、onundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,
10、Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCen
11、tre:RuedelaScience23,B-1040Brussels2025CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.EuropeanforewordThisdocument(ENISO29461-4:2025)hasbeenpreparedbyTechnicalCommitteeISO/TC142CleaningequipmentforairandothergasesincollaborationwithTechnicalCommitteeCEN/TC195C
12、leaningequipmentforairandothergasesthesecretariatofwhichisheldbyUNI.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyOctober2025,andconflictingnationalstandardsshallbewithdrawnatthelatestbyOctober2025.Attentionisdrawntothep
13、ossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite.
14、AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,M
15、alta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandtheUnitedKingdom.EndorsementnoticeThetextofISO29461-4:2025hasbeenapprovedbyCENasENISO29461-4:2025withoutanymodification.ContentsPageForewordvIntroductionvi1 Scope12 N
16、ormativereferences13 Termsanddefinitions13.1 Airflows23.2 Efficiencies24 Symbolsandabbreviatedterms25 Principle36 Testrigandequipment36.1 Testrig36.2 Testduct46.2.1 Testriglayout46.2.2 Testairconditioning56.2.3 Measurementoftheairflowrate56.2.4 Measurementofpressuredrop56.2.5 Solidsaltaerosolmixings
17、ection56.2.6 Measurementoftemperatureandrelativehumidity56.3 Measurementequipment56.3.1 Testriginstrumentation56.3.2 Sodiumflamephotometer66.4 Solidsaltaerosolsampling76.4.1 Sampleprobes76.4.2 Samplingairflow76.5 Solidsaltaerosolgeneration76.5.1 Saltgeneration76.5.2 Aerosolinjection.76.6 Watersprayd
18、evice76.7 Watercollectiondevice.77 Qualificationoftestrigandapparatus87.1 Pressuresystemtesting87.2 Solidsaltaerosoluniformity87.2.1 Aerosoluniformityparameters87.2.2 Aerosoluniformityprotocol87.2.3 Aerosoluniformityresults87.2.4 Waterdropletsizedistributions97.2.5 Waterfogsedimentationcheck97.2.6 S
19、cheduleofqualification98 Testconditions98.1 Testair98.2 Testwater109 Testmethod109.1 Stopcriteria109.2 Adjustmentofthetestairflowrate109.3 Preparatorychecks109.3.1 Operationalreadinessofthemeasuringinstruments109.3.2 Zerolevelcheckmeasurementofthesodiumflamephotometer(SFP)109.3.3 Absolutepressure,te
20、mperatureandrelativehumidityofthetestair109.3.4 Startingupthesaltgenerator119.3.5 Installationofthetestfilter119.3.6 Flushingthetestfilter119.4 Measurements119.4.1 Measurementofpressuredrop119.4.2 Measurementofthesaltremovalefficiency119.4.3 Measurementofthewaterremovalefficiency129.4.4 Cumulativesa
21、ltloading129.4.5 Cumulativesaltpenetration1310 Testprocedure1310.1 Preparationoftestrig(notestobjectinstalled)1310.2 Cleaningoftestrig1310.3 Primaryweighingofthetestobject1310.4 Installationofthetestobject1410.5 Primarywaterdelugechallenge1410.6 Saltloading1410.7 Waterdelugechallenge1410.8 Relativeh
22、umiditycycles1510.9 Endoftest1510.10 Secondaryweighingofthetestobject1511 Reportingresults1611.1 General1611.2 Observations1611.3 Reporttemplate18AnnexA(informative)Ultrafinedrysolidsaltgenerator21Bibliography28ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnation
23、alstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governme
24、ntal,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedi
25、fferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(SeeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnoposi
26、tionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtain
27、edfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecificte
28、rmsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT工seeWWW.iso.org/iso/foreword.html.ThisdocumentwaspreparedbyTechnicalCommitteeISO/TC142Cleaningequipmentforairandothergases,incollaborationwit
29、htheEuropeanCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC195,Cleaningequipmentforairandothergases,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).AlistofallpartsintheISO29461seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshouldbedir
30、ectedtotheusersnationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.isoorq/membnrs.html.IntroductionTheuseofgasturbinesintheoilandgasindustryrepresentsoneofthemostchallengingapplicationsforthisenginetechnology.Themajorconstraintoftheoilandgasindustryistorun24/7atfullloadwithminimumdown
31、time.Inoilandgasactivity,theinstallationmustberunascloseaspossibleto100%ofthetimewiththehighestlevelofefficiency(currentproductioncomparedtonominalproduction).Anadditionalchallengeforoilandgasapplicationsliesintheabsenceofaback-upturbineonsite,especiallyformechanical-drivegasturbineconfigurations.Th
32、ecoastalandoffshoreenvironmentprobablyrepresentstheharshestconditionsforgasturbines.Humidity,rainfallandseasonaldustarethemostobviousvisibleconditionsthatoperatorsfaceonsite.Hiddeninthecombustionair,alkalisuchaspotassium,sodiumormagnesium,aswellassulfurlsoot,volatilehydrocarbons,oilyvapours,andparti
33、clesallgenerategasturbineissuesincludingcompressorfouling,air-coolingpassagefouling,vaneandbladeerosion,andcompressorcorrosion.Combinedwithsulfurinfuels,thesealkaliincombustionaircreatehotcorrosion.Finally,heavyrainfallcaninducefilterwashingsthatreleasefilteredparticlesintothecompressor.Allthesephen
34、omenaimpactthegasturbineavailabilityonsite.Theroleofahighlyefficientairfiltrationsystemistomaintaintheenginecleanlinessbypreventingtheintroductionofcontaminantsintothegasturbineairintake.Achievingahighlevelofenginecleanlinesshelpsmaintainengineintegrityandefficiencyandreducestheneedforwaterwasheswhi
35、chgenerateavoidabledowntime.Currently,highefficiencyfilterelementsarecharacterizedbyalimitednumberofparameters,namelyfilterefficiencyandmostpenetratingparticlesize(MPPS).Theseparameters,relatedtoasinglefilterelement,aremeasuredinlaboratoryconditionsclosetofavourableinlandconditionswithsyntheticdust.
36、Consequently,theseconditionsarefarfromtherealityobservedonsite,offshoreornearcoast,wherefilterelementsareusuallypartofasystem.Thetestresultsdonotthereforeprovideabasisforpredictingeitheroperationalfilterperformanceorservicelife.Theobjectiveofthisdocumentistoconsiderhowtheeffectofwaterspray,humiditya
37、ndsaltaffectstheperformanceofanairfilter.Thetestedairflowpassingthroughthefilterelementisclosetotheairflowrateoperatedonsiteforthethreedifferentconcepts:low,mediumorhighvelocityfilterelements.Sootlvolatilehydrocarbons,oilyvapoursandparticlesalsohaveimpactonfiltercharacterizationandperformance.Thesep
38、aratepartsofISO29461coverparticles,whilesoot,volatilehydrocarbonsandoilyvapoursareyettobeaddressed.Currenttestmethodsarenotmatureenoughfortheinclusionofsoot,volatilehydrocarbonsandoilyvapours.Theageingofafilterelementinstalledoffshoreandnearthecoastisaddressedtoallowthepredictionofoperationalfilterp
39、erformanceanditsassociatedservicelife.Itmustbeunderstoodhowfilterelementsperformduringdifferentcyclesrepresentingtypicalsiteconditionssuchasheavyrainfall,lowandhighhumidity,filterelementunloadedandloaded.Dependingonthegasturbineapplications,theservicelifeofthefilterelementisalsoacriteriontotakeintoc
40、onsideration.Inthiscase,therobustness,loadingcapacityandpressuredropcharacteristicsofthefilterelementsbecomekeyparametersfordesignandtesting.Zy461-4：ZUZbtTTt三11THlttUTcilSLditlcitlISO294614:2025(匕U)Airintakefiltersystemsforrotarymachinery一Part4:Testmethodsforstaticfiltersystemsincoastalandoffshoreen
41、vironments1 ScopeThisdocumentdefinestestmethodsforperformancetestingofindividualfilterelementsandofthecompletefiltrationsystemThisprocedureisintendedforfilterelementsandfiltersystemswhichoperateatflowratedupto8000m3hperfilterelement.2 NormativereferencesThefollowingdocumentsarereferredtointhetextins
42、uchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO2813,Paintsandvarnishes-Determinationofglossvalueat2060and85ISO5167-1,Measurementofflui
43、dflowbymeansofpressuredifferentialdevicesinsertedincircularcrosssectionconduitsrunningfullPart1:GeneralprinciplesandrequirementsISO16890-2:2022,AirfiltersforgeneralventilationPart2:MeasurementOffractionalefficiencyandairflowresistanceISO29461-2:2022,Airintakefiltersystemsforrotarymachinery-Testmetho
44、ds-Part2:FilterelementendurancetestinfogandmistenvironmentsISO29463-llHighefficiencyfiltersandfiltermediaforremovingparticlesfromairPart1:Classification,performance,testingandmarkingISO29464,CleaningofairandOthergasesVocabulary3 TermsanddefinitionsForthepurposesofthisdocument,thetermsanddefinitionsg
45、iveninISO29464andthefollowingapply.ISOandIECmaintainterminologydatabasesforuseinstandardizationatthefollowingaddresses: ISOOnlinebrowsingplatform:availableathttps:WWW.iso.org/obp IECElectropedia:availableathttps:WWW.electropedia.org/1.1 Airflows3.1.1airflowratevolumeofairflowingthroughthefilterperun
46、ittimeSOURCE:ISO29464:2024,3.1,293.1.2testairflowraterateofairflowusedfortestingNote1toentry:Theflowrateisusuallyexpressedinvolumetricunitsm3h(cfm).Note2toentry:Testflowratemaydifferfromthemanufacturersspecifiedflowthroughtheaircleaner.SOURCE:ISO29464:20213.1.323.1.3designairflowrateairflowratespeci
47、fiedbythemanufacturerSOURCE:ISO29464:2024,3.1,301.2 Efficiencies1.2.1saltremovalefficiencymeasureoftheabilityofafiltertoremovesaltfromtheairpassingthroughit1.2.2waterremovalefficiencymeasureoftheabilityofafiltertoremovewaterfromtheairpassingthroughit1.3 testdeviceairfilterordevicetobetested4 Symbols
48、andabbreviatedtermsCVcoefficientofvariationCWmwaterfogmassconcentration,gm3dsaturatedwetairmoisturecontent,g/kgd0ambientairmoisturecontent,g/kgdPpressuredrop,PaEsaltsaltremovalefficiencyEwwaterremovalefficiencympwatermasspenetratedthroughtestedfilterattheendofthetest,kg11ottotalwaterfoggenerationamount,kgNasodiumNaClsodiumchlorideRHrelativehumidity
