1、BRITISH STANDARD BS EN 1279-2:2002 Glass in building Insulating glass units Part 2: Long term test method and requirements for moisture penetration The European Standard EN 1279-2:2002 has the status of a British Standard ICS 81.040.20 BS EN 1279-2:2002 This British Standard, having been prepared un
2、der the 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 8 January 2003 BSI 8 January 2003 ISBN 0 580 41079 X National foreword This British Standard is the official English langu
3、age version of EN 1279-2:2002. 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 obtai
4、ned on request 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 o
5、f the BSI 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 its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid
6、 enquirers 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 Thi
7、s document 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 EUROP
8、ISCHENORM EN12792 November2002 ICS81.040.20 Englishversion GlassinbuildingInsulatingglassunitsPart2:Longtermtest methodandrequirementsformoisturepenetration VerredanslaconstructionVitrageisolantprfabriqu scellPartie2:Mthodedessaidelonguedureet exigencesenmatiredepntrationdhumidit GlasimBauwesenMehrs
9、cheibenIsolierglasTeil2: LangzeitprfverfahrenundAnforderungenbezglich Feuchtigkeitsaufnahme ThisEuropeanStandardwasapprovedbyCENon5September2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwitho
10、utanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCE
11、NmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switzerlanda
12、ndUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN12792:2002EEN12792:2002(E) 2 Contents pag
13、e Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions,abbreviationsandsymbols .5 3.1 Termsanddefinitions. .5 3.2 Abbreviations .5 3.3 Symbols 5 4 Requirements .6 4.1 Moisturepenetrationindex .6 4.2 Edgesealstrength .6 4.3 Gasleakagerate 6 5 Methodoftest 7 5.1 Principle7 5.2 Climatecond
14、itionsincabinet. 7 5.3 Number,descriptionandselectionofthetestspecimens. .9 5.4 Procedure .10 6 Methodsofmeasurement .11 6.1 Measurementofdewpointtemperature 11 6.2 Measurementofmoisturecontent . 11 6.2.1 General11 6.2.2 Moisturecontentofdesiccantinbulk . 11 6.2.3 Moisturecontentofdesiccantincorpora
15、tedinorganicspacer 12 6.2.4 Moisturecontentininsulatingglassunitswithoutdesiccant 12 7 Testreport . .14 AnnexA (normative) Referencemethodfordewpointtemperaturemeasurement .15 A.1 General15 A.2 Apparatusandmaterials. 15 A.3 Procedure .15 AnnexB (normative) Moisturecontentmeasurementaccordingtothe950
16、Cdryingmethod 17 B.1 Applicability17 B.2 Apparatus,materialsandpreparatorywork . 17 B.3 Initialandfinalmoisturecontent 18 B.4 Standardmoistureadsorptioncapacity. .20 AnnexC (normative) MoisturecontentmeasurementaccordingtotheKarlFischermethod 21 C.1 Applicability21 C.2 Apparatus,materialsandpreparat
17、orywork . 21 C.3 Initialandfinalmoisturecontent 22 C.4 Standardmoistureadsorptioncapacity. .25 AnnexD (normative) Establishingthestandardmoistureadsorptioncapacityofdesiccants .27 D.1 General27 D.2 Appropriateinformation. .27 D.3 Generallyacceptedvaluesfordesiccantinbulk. .28 D.4 Desiccantmanufactur
18、ing. .28 Bibliography 29EN12792:200 2( E) 3 Foreword Thisdocu ment(EN12 792: 2002) has been prepared by Technical CommitteeCEN/ TC 129 “Glassi n building“, the secretariat of which ish eld by IBN. This EuropeanSt andard shall be giventh e status of a nationalst andard, either by publication ofaniden
19、 ticaltextor byendorsement,atthelatestbyMay2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby May2 003. Thedescribed testingis partof type evaluationof insulating glassunits. ThisEurop ean Standard “GlassinBuildingInsulatingglassunits ”consistsofthefollowingParts: Part1:Generalities,d
20、imensionaltolerancesandrulesforthesystemdescription. Part2:Longtermtestmethodandrequirementsformoisturepenetration. Part3:Longtermtestmethodandrequirementsforgasleakagerateandforgasconcentrationtolerances. Part4:Methodsoftestforthephysicalattributesofedgeseals. Part5:EvaluationofConformity. Part6:Fa
21、ctoryproductioncontrolandperiodictests. Theannexes At o Dar e normative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuro peanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland
22、Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden, Switzerland and the UnitedKin gdom.EN12792:2002(E) 4 1Scope ThisEuropeanStandardspecifiesrequirementsformoisturepenetrationandthelongtermtestmethodfor insulatingglassunitsandensuresbymeansofanadequateevaluationofconformitytothisstand
23、ardthatover time: energysavingsaremadebecausethe Uvalueandsolarfactordonotchangesignificantly; healthispreservedbecausesoundreductionandvisiondonotchangesignificantly; safetyisprovidedbecausemechanicalresistancedoesnotchangesignificantly. Itcoversadditionalcharacteristicsthatareofimportancefortrade.
24、Markingconditionsareincluded. Forglassproductswithelectricalwiringorconnectionsfore.g.alarmorheatingpurposes,thisstandardcovers onlywiringsubjectforelectricalpotentialdifferencetoearthlessthan50Va.c.orlessthan75Vd.c. Themainintendedusesoftheinsulatingglassunitsareinstallationsinbuildingsandconstruct
25、ionssuchasin windows,doors,curtainwalling,roofsandpartitionswherethereexistsprotectionagainstdirectultravioletradiation attheedges. NOTE1 Incaseswherethereisnoprotectionagainstdirectultravioletradiationattheedges,suchasstructuralsealant glazingsystems,additionalEuropeantechnicalspecificationsshouldb
26、efollowed. NOTE2 Unitswherethenatureisonlyartisticarenotpartofthisstandard. ThisPartofthisstandard,whichisinextricablyboundupwiththeotherPartsofthisstandard,coversthemoisture penetrationbytestingasonemeansofverifyingwhetheraproductmadeinaccordancewithitssystemdescription conformswiththerelevantaspec
27、tofthedefinitiononinsulatingglassunits. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorr
28、evisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedbyamendmentorrevision.Forundatedreferences,thelatesteditionofthe publicationreferredtoapplies(includingamendments). EN5721, GlassinBuildingBasicsodalimesilicateglassproductsPart1:Definitionsandgeneralphysicaland mechanic
29、alproperties. EN5722, GlassinBuildingBasicsodalimesilicateglassproductsPart2:Floatglass. prEN12791:1998, GlassinBuildingInsulatingglassunitsPart1:Generalities,dimensionaltolerancesandrules forthesystemdescription. EN12793, GlassinBuildingInsulatingglassunitsPart3:Longtermtestmethodandrequirementsfor
30、gas leakagerateandforgasconcentrationtolerances. EN12794, GlassinBuildingInsulatingglassunitsPart4:Methodsoftestforthephysicalattributesofedge seals. ISO760, DeterminationofwaterKarlFischermethod(Generalmethod).EN12792:2002(E) 5 3 Termsanddefinitions,abbreviationsandsymbols 3.1 Termsanddefinitions F
31、orthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninprEN12791:1998togetherwiththe followingapply. 3.1.1 standardlaboratoryconditions ambienttemperatureof(232)Candarelativehumidityof(505)% 3.1.2 standardmoistureadsorptioncapacity capacityofadesiccantmaterialtoadsorbaquantityofmoistureund
32、ercontrolledlimitenvironmentconditions 3.1.3 controlledlimitenvironmentconditions environmenttemperature10Cwithadewpointtemperatureof5C,givingarelativehumidityof32,8% 3.1.4 moisturepenetrationindex amountofdryingcapacityconsumedafterstandardisedageingconditions 3.1.5 accuracy precisionofthetestmetho
33、ditselfwithinconfidencelimitsof99% 3.2Abbreviations r.h. relativehumidity 3.3Symbols I Moisturepenetrationindex(canbeexpressedindecimalorinpercentageterms); I av Averagevalueofthemoisturepenetrationindices I,obtainedoverfivemeasurements; m o Massofdishwhenempty,cleananddry; m c Massofdishplusdesicca
34、ntpluswateradsorbedfromr.h.of32%air; m f Massofdishplusdesiccantpluswaterinitiallyadsorbedpluswateradsorbedwhensubjectedtotheclimate conditionsinthecabinet; m i Massofdishplusdesiccantpluswaterinitiallyadsorbed; m r Massofdishplusdesiccantpluswateradsorbedinequilibriumwithadefinedreferencelevelofrel
35、ative humidityofair,ordishplusdrieddesiccantathightemperatures; M m Massofdesiccantinmixtureswithnondesiccantmaterial; M t Totalmassofdesiccantwhen,forthepurposeoftesting,inamixturewithnondesiccantmaterial,thenon desiccantmaterialisreplacedbythesamevolumeofdesiccant; R Ratiobetweenthemassesofdesicca
36、nt M m and M t;EN12792:2002(E) 6 T c Standardmoistureadsorptioncapacityofdesiccant; T c,av Averagestandardmoistureadsorptioncapacityofdesiccant T c obtainedovertwomeasurements; T f Finalmoisturecontentofdesiccant; T f,u Uncorrectedfinalmoisturecontentofdesiccant; T i Initialmoisturecontentofdesiccan
37、t; T i,av Averageinitialmoisturecontentofdesiccant T i obtainedoverfourmeasurements; T i,u Uncorrectedinitialmoisturecontentofdesiccant; Q Temperatureoftestspecimensintestcabinet; Q c Temperatureofthecentraltestspecimenintestcabinetduringconstanttemperaturephase; Q h Hightemperatureofthecentraltests
38、pecimeninthetestcabinetduringthehighhumidity/temperaturecycling phase; Q l Lowtemperatureofthecentraltestspecimeninthetestcabinetduringthehighhumidity/temperaturecycling phase; Q s Temperatureofthecentraltestspecimeninthetestcabinetasthecyclemovesbetweenhightemperature andlowtemperatureandviceversa.
39、 4Requirements 4.1 Moisturepenetrationindex Insulatingglassunitsshallfulfiltheirfunctionsduringaneconomicallyreasonableworkinglife.Thereforethe followingvaluesareverifiedontestspecimenssubmittedtotheclimatetestdescribedinthisPartofthestandard: Theaveragemoisturepenetrationindex I av overthefivetests
40、pecimenshallnotexceed0,20. Althoughbreakageoftheglassdoesnotconstitutefailure,theaveragemoisturepenetrationindex I av shallbethe averageovernotlessthan,andnomorethan,fiveunits.Spareunitsshallbeusedinsteadofthebrokentest specimens. Theunitwiththehighestmoisturepenetrationindexshallhaveanindexvalue In
41、otexceeding0,25. 4.2 Edgesealstrength Fortherequirementsonedgesealstrength,refertoEN12794. 4.3 Gasleakagerate Whenthesystemdescriptionincludesgasfilledinsulatingglassunits,foradditionaltestingandrequirementson gasleakagerate,refertoEN12793.EN12792:2002(E) 7 5 Methodoftest 5.1Principle Setsofinsulati
42、ngglassunitsareexposedtoaclimatetest.Theinitialandfinaldewpointandtheinitialandfinal moisturecontent,asapplicable,aremeasuredandthemoisturepenetrationindexiscalculated. 5.2 Climateconditionsincabinet Thehighhumidity/temperaturetestprocedureconsistsoftwoparts.Theclimateconditioninthecabinetcomprises
43、asafirstpart56temperaturecyclesof12hfrom18Cto+53Cwithslopesof14C/h,followedbyasecondpart comprisingconstanttemperatureof+58Cforsevenweeks.Highhumidityshallbeasdescribed. Theexactspecificationsofthetemperature,humidityandtime,andtheirtolerances,aregiveninFigures1and2. Key 1 56temperaturecyclesof12h(isfourweeks) 2 Intervalof2hto4hformovingtestpiecesfromonecabinettoasecondcabinetwhentwocabinetsareused 3 (11764)h(sevenweeks)constanttemperatureandarelativehumidityofr.h. 95%.Condensationontest specimenisallowed Figure1Overviewofclimateconditionsincabinet. QQ
