1、BRITISH STANDARD BS EN 1279-4:2002 Glass in building Insulating glass units Part 4: Methods of test for the physical attributes of edge seals The European Standard EN 1279-4:2002 has the status of a British Standard ICS 81.040.20 BS EN 1279-4:2002 This British Standard, having been prepared under th
2、e direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 12 July 2002 BSI 12 July 2002 ISBN 0 580 40110 3 National foreword This British Standard is the official English language versio
3、n of EN 1279-4:2002. The UK participation in its preparation was entrusted by Technical Committee B/520, Glass and glazing in building, to Subcommittee B/520/2, Insulating glass products, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on req
4、uest to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI
5、Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquire
6、rs to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This docume
7、nt comprises a front cover, an inside front cover, the EN title page, pages 2 to 29 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENOR
8、M EN12794 July2002 ICS81.040.20 Englishversion GlassinbuildingInsulatingglassunitsPart4:Methodsoftest forthephysicalattributesofedgeseals VerredanslaconstructionVitrageisolantprfabriqu scellPartie4:Mthodesdessaidesproprits physiquesdesproduitsdescellement GlasimBauwesenMehrscheibenIsolierglasTeil4:
9、PrfmethodenderphysikalischenEigenschaftendes Randverbundes ThisEuropeanStandardwasapprovedbyCENon5March2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibli
10、ographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedt
11、otheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFOR
12、STANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN12794:2002EEN12794:2002(E) 2 Content page Foreword 3 1 Scope 3 2 Normativerefe
13、rences 4 3 Terms,definitionsandsymbols 5 4 Requirements 5 5 Testmethods 8 6 Testreport 13 AnnexA(normative)Testspecimensforadhesiontest 14 AnnexB(normative)Requirementforedgesealstrengthcomparisonsincaseof substitutingsealant 17 AnnexC(normative)Methodofmoisturevapourtransmissionratemeasurement 18 A
14、nnexD(normative)Adhesiononcoatingsandinterlayeradhesionofcoatings 22 AnnexE(informative)Informativetests 27 AnnexF(informative)Exampleofasunsimulatingradiationsource 28 Bibliography 29EN12794:2002(E) 3 Foreword ThisdocumentEN12794:2002hasbeenpreparedbyTechnicalCommitteeCEN/TC129 “Glassinbuilding“,th
15、esecretariatofwhichisheldbyIBN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyJanuary2003,andconflictingnational standardsshallbewithdrawnatthelatestbyJanuary2003. Thedescribedtestingispartoftypeevaluationofinsulatinggl
16、assunits. ThisPartofthestandarddoesnotstandalone,itispartofonestandard: prEN12791,GlassinbuildingInsulatingglassunitsPart1:Generalities,dimensional tolerancesandrulesforthesystemdescription. prEN12792,GlassinbuildingInsulatingglassunitsPart2:Longtermtestmethod andrequirementsonmoisturevapourpenetrat
17、ion. prEN12793,GlassinbuildingInsulatingglassunitsPart3:Longtermtestmethod andrequirementsforgasleakagerateandforgasconcentrationtolerances. EN12794,GlassinbuildingInsulatingglassunitsPart4:Methodsoftestforthe physicalattributesofedgeseals. prEN12795,GlassinbuildingInsulatingglassunitsPart5:Evaluati
18、onofconformity. EN12796,GlassinbuildingInsulatingglassunitsPart6:Factoryproductioncontrol andperiodictests. TheannexesA,B,CandDarenormative.TheannexesEandFareinformative. ThisstandardincludesaBibliography. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizations ofthefollowingc
19、ountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switzerlandandthe UnitedKingdom. 1S c o p e ThisEuropeanStandardistheproductstandardforinsulatingglass
20、units,whichdefines insulatingglassunits,andensuresbymeansofanadequateevaluationofconformitytothis standardthatovertime: energysavingsaremadebecausetheUvalueandsolarfactordonotchangesignificantly; healthispreservedbecausesoundreductionandvisiondonotchangesignificantly; safetyisprovidedbecausemechanic
21、alresistancedoesnotchangesignificantly. Itcoversadditionalcharacteristicsthatareofimportancefortrade.Markingconditionsare included.EN12794:2002(E) 4 Forglassproductswithelectricalwiringorconnectionsfore.g.alarmorheatingpurposes, thisstandardcoversonlywiringsubjectforelectricalpotentialdifferencetoea
22、rthlessthan 50Va.c.orlessthan75Vd.c. Themainintendedusesoftheinsulatingglassunitsareinstallationsinbuildingsand constructionssuchasinwindows,doors,curtainwalling,roofsandpartitionswherethere existsprotectionagainstdirectultravioletradiationattheedges. NOTE1Incaseswherethereisnoprotectionagainstdirec
23、tultravioletradiationattheedges,suchasstructural sealantglazingsystems,additionalEuropeantechnicalspecificationsshouldbefollowed.SeeBibliography4 and5. NOTE2Unitswherethenatureisonlyartisticarenotpartofthisstandard. ThisEuropeanStandard,whichisinextricablyboundupwiththeotherPartsofthestandard, cover
24、sevaluationoftheedgesealstrength,andpartialevaluationofmoistureandgas permeationthroughsealants,bytestingand/orreportexaminationasmeansofverifying whetheraproductmadeinaccordancewithitssystemdescription,anditsvariationsin accordancewithprEN12791,conformswiththerelevantaspectsofthedefinitionof insula
25、tingglassunits. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromother publications.Thesenormativereferencesarecitedattheappropriateplacesinthetextandthe publicationsarelistedhereafter.Fordatedreferences,subsequentamendmentstoorrevisions ofanyofthesepubl
26、icationsapplytothisEuropeanStandardonlywhenincorporatedinitby amendmentorrevision.Forundatedreferences,thelatesteditionofthepublicationreferred toapplies(includingamendments). EN410, GlassinbuildingDeterminationofluminousandsolarcharacteristicsofglazing. EN1096, GlassinbuildingCoatedglass. prEN12791
27、, GlassinbuildingInsulatingglassunitsPart1:Generalities,dimensional tolerancesandrulesforthesystemdescription. prEN12792, GlassinbuildingInsulatingglassunitsPart2:Longtermtestmethodand requirementsonmoisturevapourpenetration. prEN12793, GlassinbuildingInsulatingglassunitsPart3:Longtermtestmethodand
28、requirementsforgasleakagerateandforgasconcentrationtolerances. EN12796, GlassinbuildingInsulatingglassunitsPart6:Factoryproductioncontrol andperiodictests.EN12794:2002(E) 5 3 Terms,definitionsandsymbols 3.1 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsofprEN12791,pr
29、EN 12792,prEN12793andEN12796applyaswellasthefollowingtermsanddefinitions. 3.1.1 moisturevapourtransmissionrate steadymoisturevapourflowinunittimethroughunitareaofabody,normaltospecific parallelsurfaces,underspecificconditionsoftemperatureandhumidityateachsurface 3.1.2 standardroomconditions ambientt
30、emperatureof(232)Candarelativehumidityof(505)%r.h 3.2 Symbols e Extensionofbondexpressedasapercent s Stressappliedtothebondduringextension D P H2O Differenceinwatervapourpressureacrossamembrane 4 Requirements 4.1 Edgesealstrength Alledgesealsshallhavesufficientadhesiveandcohesivestrengthtoallowthejo
31、intsas specifiedtobeextendedsuchthatanyfailureoccursoutsidetheareaOABofFigure1. Ifduringthestrengthtestoftheglasssealantglassjoint,seenfromthesideview,lossof adhesionorcohesionextendsthroughthewholedepthofthesealantwithintheareaOABof Figure1,thenthesealanttestspecimenhasfailed(seeFigure2).Theprincip
32、leoflight transmissionthroughthedefectcanbeappliedtodeterminepassorfailure. Breakageoftheglassduringtestingdoesnotconstitutefailure,providingthatsufficient successfuljointsaretestedinorderthattheaverageresultcanbeobtained. Forcomparisonsofsealstrength,neededforsubstitutingsealants,refertoannexB.EN12
33、794:2002(E) 6 Key 1AreaOAB.Inthatarea,nobreakageallowedbeforeandafterageing s Stressinthesealant e Straininthesealant Figure1Stress/straintriangle Key 1Lossofcohesion 2Lossofadhesion Figure2Illustrationoflossofadhesionorcohesionextendsthroughthewholedepth 4.2 Conformitywiththedefinitionofinsulatingg
34、lassunits 4.2.1 General Thereshallbeavailableatestreportoftheconcernedinsulatingglassoutersealantaccording toclause6ofthisEN12794:2002(whichsummarizesthetestreportinwhichtheedgeseal strengthisrecorded)withamoisturepenetrationtestreportaccordingto prEN12792andincaseofgasfilledunitsalsowithagasleakage
35、ratereportaccordingto prEN12793,andfulfillstherequirementtodemonstratetheconformitywiththedefinition ofinsulatingglassunits.RefertoprEN12791. Incaseofsealingtheinsulatingglassunitalsoonacoating(inaccordancewithEN1096)not intendedtobestripped,atestreportaccordingtoannexDofthisEN12794:2002shallbe made
36、availableforinclusionintheassemblingoftheothertestreports.RefertoprEN12791.EN12794:2002(E) 7 NOTEAlthoughonlyclearfloatglassisreferredtointhestandard,itistheresponsibilityoftheinsulating glassmanufacturertoensurethattheedgesealantiscapableofbondingtoallusedglasseslistedin prEN12791.Therequirementsfo
37、rtheuseofcoatedglassesinaccordancewithEN1096,aredetailedin annexD. 4.2.2 Possibilitytosubstitutethesealant 4.2.2.1 Limitsofapplication Thispossibilityisapplicableonlyinthecaseofinsulatingglassunitswithhollowmetal spacer.Forothersystems,noexperienceisavailableforthesettingupofsubstitutionrules. Refer
38、alsotoprEN12791. 4.2.2.2 Airfilledinsulatingglassunits Availabletestreportsaccordingtoclause6ofthisEN12794:2002allowsforthe substitutionofthesealantwithoutrepeatedmoisturepenetrationtestingaccordingtoprEN 12792,whenthesubstitutingsealant: (a) forunitswithanIvaluebelow0,1: shallbeapplicablewiththesam
39、eproductionequipment; hasbeenpreviouslyappliedininsulatingglassunitswhichhavebeendemonstratedto complywithprEN12792.Thedemonstratedcompliancemayhavebeenobtained separatelyusingunitsofdifferentconstructionandthereforethetestreportnumbersmay vary; andthemoisturevapourtransmissionrateofthesealantisnotm
40、orethan20%higher thanthatoftheinitialsealant; andthestress/straincurvecomparisonsatisfiestherequirementinannexB; andtherelevantPartsofEN12796(periodictest,mixingratio,hardnesstest,etcetera) shallbecarriedout. (b) forunitswithanIvaluebetween0,1and0,2:thelistundera)applieshoweverwiththe followingdevia
41、tion: themoisturevapourtransmissionratethroughmembraneofthesubstitutesealantshallbe thesameorlowerthantheinitialsealant. 4.2.2.3 Gasfilledinsulatingglassunits Availabletestreportsaccordingtoclause6ofthisEN12794:2002allowstosubstitutethe sealantwithoutrepeatedgaslossratetestingaccordingtoprEN12793,wh
42、enthesubstituting sealant: (a) forunitswithagaslossrate L i below0,8% a 1 : isallowedforlimitingthemoisturevapourpenetrationinaccordancewith4.2.2.2; hasbeenpreviouslyappliedininsulatingglassunitswhichhavebeendemonstratedto complywithprEN12793.ThedemonstratedcompliancemayhavebeenobtainedEN12794:2002(
43、E) 8 separatelyusingunitsofdifferentconstructionandthereforethetestreportnumbersmay vary; andthegaspermeationofthesealantisnotmorethan20%higherthanthatoftheinitial sealant. (b) forunitswithagaslossrate L i between0,8% a 1 and1,0% a 1 :thelistundera)applies howeverwiththefollowingdeviation: andthegaspermeationofthesubstitutesealantshallbethesameorlowerthantheinitial sealant. 4.2.3 Poss
