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1、.GB/T5137.4-2001FOREWORDThestandardreferstoMethodfortheDeterminationofSolarTransmittanceofRoadVehiclesSafetyGlazingMaterials;itstechnicalcontentisthesameasthoseofISO/DIS13837,exceptsomechangesofliteralexpressionandcompilationformat.AnnexA,annexB,annexC,annexD,andannexEofthisstandardarenormative.Anne
2、xFisinformative.ThisstandardisproposedbytheStateBureauofBuildingMaterialsIndustry.ThisstandardisputunderthecentralizedmanagementoftheSubcommitteeonSafetyGlazingoftheNationalAutomobileStandardizationTechnicalCommittee.Thedraftingunitofthisstandard:InstituteofGlassandSpecialGlassFiberunderChinaBuildin
3、gMaterialsAcademy.Themaindraftsmenofthisstandard:WangRui,DaiLei,MoJiao,YangJianjun,ZhangDashun.ApprovedbytheGeneralAdministrationforQualitySupervision,InspectionandQuarantineofthePeople’sRepublicofChinaonApril29,2001EffectiveasofOctober01,20011NationalStandardofPRCRoadVehicles—SafetyGlazingMaterials
4、-MethodfortheDeterminationofSolarTransmittanceGB/T5137.4-20011ScopeThisStandarddefinesthemethodsforthedeterminationofsolarultraviolettransmittance,solardirecttransmittance,andsolartotaltransmittanceofthesafetyglazingmaterialsofvehiclesandotherroadautomotivevehicles.Thestandardisapplicabletothedeterm
5、inationofsolartransmittanceofthesafetyglazingmaterialsofvehiclesandotherroadautomotivevehicles.2NormativeReferencesThefollowingstandardscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthisstandard.Atthetimeofpublication,theeditionsindicatedwerevalid.Allstandardsaresubjecttore
6、vision,andpartiestoagreementsbasedonthisstandardareencouragedtoinvestigatethepossibilityofapplyingthelatesteditionsofthestandardsindicatedbelow.GB/T2680—1994Determinationofvisiblelighttransmittance,solardirecttransmittance,solartotaltransmittance,andultraviolettransmittanceofbuildingglazingaswellasp
7、arametersofrelevantwindowglazing(neqISO9050:1990)3DefinitionsThefollowingdefinitionsareadoptedforthestandard.3.1TransmittanceItistheratiooftransmissionfluxandincidencefluxunderspecificallygeometricalc
