1、BRITISH STANDARD BS EN 1279-3:2002 Glass in building Insulating glass units Part 3: Long term test method and requirements for gas leakage rate and for gas concentration tolerances The European Standard EN 1279-3:2002 has the status of a British Standard ICS 81.040.20 BS EN 1279-3:2002 This British
2、Standard, having been prepared under 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 41078 1 National foreword This British Stand
3、ard is the official English language version of EN 1279-3:2002. 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
4、on this subcommittee can be obtained 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
5、 by using the “Search” facility of 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 imm
6、unity from legal obligations. aid 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 the
7、m in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 27 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 CommentsEURO
8、PEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN12793 November2002 ICS81.040.20 Englishversion GlassinbuildingInsulatingglassunitsPart3:Longtermtest methodandrequirementsforgasleakagerateandforgas concentrationtolerances VerredanslaconstructionVitrageisolantprfabriqu scellPartie3:Mthodedessailongtermee
9、t prescriptionspourledbitdefuitedegazetpourles tolrancesdeconcentrationdugaz GlasimBauwesenMehrscheibenIsolierglasTeil3: LangzeitprfverfahrenundAnforderungenbezglich GasverlustrateundGrenzabweichungenfrdie Gaskonzentration ThisEuropeanStandardwasapprovedbyCENon1September2002. CENmembersareboundtocom
10、plywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanSt
11、andardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,
12、Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allri
13、ghtsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN12793:2002EEN12793:2002(E) 2 Contents page Foreword4 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitionsandsymbols . .6 4 Requirements .8 4.1 Gasleakagerate 8 4.2 Tolerancesongasconcentration. 8 4.3 Dewpoin
14、tandmoisturepenetrationindex .8 4.4 Edgesealstrength .8 4.5 Additionalrequirementsforothergasesthanargon,sulfurhexafluorideandair 8 5 Testing 8 5.1 Principleoftesting .8 5.2 Apparatus .8 5.2.1 Climateexposureequipment 8 5.2.2 Containerforgasleakageratemeasurement .9 5.2.3 Gasanalysisequipment 9 5.2.
15、4 Gassamplingdevice . 9 5.3 Testspecimens 9 5.3.1 Preparationoftestspecimens. .9 5.3.2 Numberoftestspecimens 10 5.3.3 Constructionandappearance . .10 5.4 Procedure .10 5.4.1 Determinationofinternalvolumeofatestspecimen . .10 5.4.2 Climateexposure .10 5.4.3 Measuringthegasleakage . 10 5.4.4 Analysiso
16、fgas. 11 5.5 Evaluation.11 6 Precisionoftestmethod .11 7 Testreport . .11 AnnexA (normative) Requirementsforothergases13 A.1 Durabilityofthegasandinteractionwithinsulatingglasscomponents 13 A.2 Effectonthermalandsoundinsulation . 13 A.3 Assessmentexamplewithkryptongasfilling. .14 AnnexB (informative
17、) Relationshipbetweenartificialandnaturalageingwithregardtothermaland soundinsulation . .15 AnnexC (informative) Determinationofthegasleakageratebygaschromatography.16 C.1 Principleofmethod . 16 C.2 Equipment.16 C.2.1 Fullcontainer 16 C.2.2 Ringcontainer 18 C.2.3 Coolingtrap 19 C.2.4 Gaschromatograp
18、h. 19 C.2.5 Connectingpieces . 19 C.2.6 Solvents 19 C.2.7 Purgingandcarriergas. 19 C.2.8 Calibratinggas . 20 C.3 Preparationoftestspecimens. .21EN12793:2002(E) 3 C.4 Procedure .21 C.4.1 Connectionoftheapparatus . .21 C.4.2 Installationofthetestspecimen. .21 C.4.3 Temperature .21 C.4.4 Calibration 21
19、 C.4.5 Measurementofthegasleakage .21 C.4.6 Blanktest 25 C.4.7 Result 25 Bibliography 27EN12793:200 2( E) 4 Foreword ThisdocumentEN1 2793:2002 hasbe enpreparedbyTechnicalCommitteeCEN/TC 129,“Glassinbuilding“,the secretariat ofw hich ish eld by IBN. This EuropeanSt andard shall be giventh e status of
20、 a nationalst andard, either by publication of aniden ticaltextor byendorsement,atthelatestbyMay2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby May2 003. Thisdocumentispartof theseriesEN1279“GlassinbuildingInsulatingglassunits ”thatcontainsthefollowing Parts: Part1:Generalities,dim
21、ensionaltolerancesandrulesforthesystemdescription. Part2:Longtermtestmethodandrequirementsformoisturepenetration. Part3:Longtermtestmethodandrequirementsforgasleakagerateandforgasconcentrationtolerances. Part4:Methodsoftestforthephysicalattributesofedgeseals. Part5:EvaluationofConformity. Part6:Fact
22、oryproductioncontrolandperiodictests. Theannex e A isnor mative. The annexes B andCare informative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuro peanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Ger
23、many,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden, Switzerland and the UnitedKin gdom.EN12793:2002(E) 5 1Scope ThisEuropeanStandardistheproductstandardforinsulatingglassunits,whichdefinesinsulatingglassunits,and ensuresbymeansofanadequateevaluationofconform
24、itytothisstandardthat: energysavingsaremadebecausetheUvalueandsolarfactordonotchangesignificantly; healthispreservedbecausesoundreductionandvisiondonotchangesignificantly; safetyisprovidedbecausemechanicalresistancedoesnotchangesignificantly. Itcoversadditionalcharacteristicsthatareofimportancefortr
25、ade.Markingconditionsareincluded. Themainintendedusesoftheinsulatingglassunitsareinstallationsinwindows,doors,curtainwalling,roofsand partitionswherethereexistsprotectionagainstdirectultravioletradiationattheedges. NOTE Incaseswherethereisnoprotectionagainstdirectultravioletradiationattheedges,sucha
26、sstructuralsealant glazingsystems,additionalEuropeantechnicalspecificationsshouldbefollowed.SeeBibliography2and3. ThisPartofthisstandard,whichisinextricablyboundupwiththeotherPartsofthestandard,covers: thegasleakageratebytesting; thegasconcentrationtolerances; asonemeansofverifyingwhetheraproductmad
27、einaccordancewithitssystemdescription,conformswiththe relevantaspectsofthedefinitionofinsulatingglassunits. 2 Normativereferences ThisEuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicat
28、ionsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedbyamendmentorrevision.Forundatedreferences,thelatesteditionofthe publicationreferredtoapplies(includingamendments). EN5721, GlassinBuildingBasicsodalime
29、silicateglassproductsPart1:Definitionsandgeneralphysicaland mechanicalproperties. EN5722, GlassinBuildingBasicsodalimesilicateglassproductsPart2:Floatglass. EN673, GlassinBuildingDeterminationofthermaltransmittance(Uvalue)Calculationmethod. prEN12791, GlassinBuildingInsulatingglassunitsPart1:General
30、ities,dimensionaltolerancesandrulesfor thesystemdescription. EN12792, GlassinBuildingInsulatingglassunitsPart2:Longtermtestmethodandrequirementsformoisture penetration. EN12794, GlassinBuildingInsulatingglassunitsPart4:Methodsoftestforthephysicalattributesofedge seals. EN12796, GlassinBuildingInsula
31、tingglassunitsPart6:Factoryproductioncontrolandperiodictests. prEN12758, GlassinBuildingGlazingandairbornesoundinsulationDefinitionsanddeterminationofproperties.EN12793:2002(E) 6 3 Termsanddefinitionsandsymbols ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninprEN12791togetherwithth
32、e followingapply. 3.1 gasfilledinsulatingglassunits insulatingglassunitinwhichthecavitycontainsgas(es)inadditiontoair,usuallyforimprovingthermaland/or soundinsulation 3.2 gasconcentrationc percentagebyvolumeofgasinthecavity c i istheconcentrationofgas i; c i,o isthenominalvalueforasystemofinsulating
33、glassandgas iwhichisthebasisfortestingsound insulationand/orcalculatingortestingthermalinsulationtofixtherespective R w and Uvalue; c i,f istheestimatedfinalconcentrationinpercentofgas i.SeeannexA NOTE Foruseof c i,o ,seealsoEN12796. 3.3 gasleakagerateL i L i :theproportionexpressedasapercentagebyvo
34、lumeofgasileakingfromagasfilledunitperyearcalculatedby thefollowingformula: P P T T V c m L o o i o i i i = , int 6 10 6 , 87 r in% a 1 (1) wherethemeaningofthesymbolsisgiveninTable1EN12793:2002(E) 7 Table1Meaningandunitsofthesymbolsusedinequation(1) Units Symbol Description SIsystem forpractical us
35、ein equation(1) c i gasconcentrationdeterminedaccordingto5.4.4 volumefractioninpercentage m i massofgasthathasleakedfromagasfilledunitina giventime,anddeterminedaccordingto5.4.3 kg/h g/h r o,i densityofgas iattemperature T o andpressure P o kg/m g/mm P absoluteatmosphericpressureatwhichtheunitwas se
36、aled Pa sameunitas P o P o atmosphericpressureatwhich r o wasdetermined Pa e.g.hPa T temperatureatwhichunitwassealed K K T o temperatureatwhich r o wasdetermined KK V int internalvolumeofthetestspecimenaccordingto 5.4.1 m mm a oneyear NOTE r o,i isoftengivenat T o =273K(0C)and P o =1014hPa 3.4 U p U
37、value(seeEN673)forpublication:thethermaltransmittancevaluetobepublished,normallydeterminedwiththe gasconcentration c i,o .SeealsoannexA 3.5 R w,p (C/C tr ) R w (C/C tr )value(seeprEN12758)forpublication:theweightedsoundreductionindextobepublished,normally determinedwiththegasconcentration c i,o .See
38、alsoannexAEN12793:2002(E) 8 4Requirements 4.1 Gasleakagerate Thegasleakagerate, L i ,forgaseswithconcentrationshigherthan15%,andalsoforair,measuredasdescribed inclause5shallbe L i 1,00 in%a 1 (2) NOTE Formostinsulatingglassunits,measured L i valuesaremuchhigherthanactual L i valueswillbeafter10years
39、 naturalageing.Thereforethelimitingvalueshouldnotbeusedforcalculatingthegasconcentrationduringthelifetimeofth e unit.SeeannexB. Inthecaseofsealantsbasedonpolysulfide,polyurethane,siliconeorpolyisobutylene,determiningthegas leakagerateofargon(Ar)mayreplacethemeasurementofthegasleakagerateforsulfurhex
40、afluoride(SF 6 )and air. 4.2 Tolerancesongasconcentration Fortolerancesongasconcentration,refertoEN12796. 4.3 Dewpointandmoisturepenetrationindex Fortestingandrequirementsondewpointandmoisturepenetration,refertoEN12792. 4.4 Edgesealstrength Fortherequirementsonedgesealstrength,refertoEN12794. 4.5 Ad
41、ditionalrequirementsforothergasesthanargon,sulfurhexafluorideandair Forthoserequirements,refertoannexA. 5Testing 5.1 Principleoftesting Inthetest,thegasleakagerateat20Cismeasuredaftersubjectingthetestspecimentoaclimateasspecifiedin EN12792withthefollowingmodifications: thenumberofcyclesisreducedto28
42、;and thetimeataconstanttemperatureof58Cisreducedto4weeks. Formeasuringthegasleakagerate,theunitisplacedinagastightcontainerand,afteragiventime,theamountof gaswhichhasleakedfromtheunitismeasured.Afterthismeasurement,thegasconcentrationintheunitis analysedandthegasleakageratecalculated. 5.2Apparatus 5
43、.2.1 Climateexposureequipment TestapparatusfortheclimateexposureasspecifiedinEN12792.EN12793:2002(E) 9 5.2.2 Containerforgasleakageratemeasurement Acontrolledtemperaturecontainershallbeusedformeasuringthegasleakagerate,whichshallbehermetically sealable,andcapableofreceivingtheunittobetestedwhileinducingaslittlestressaspossible,sothatthe residualvolumeinthecontainerisassmallaspossiblewhilethesealededgezonesoftheunitareexposedtothe circulationofpurginggas. Thequantityofambientairpenetratingintothecontainerfromoutside,orthequanti
