Designation:E1293−02(Reapproved2019)StandardSpecificationforGlassMeasuringPipets1ThisstandardisissuedunderthefixeddesignationE1293;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversrequirementsforglassmeasur-ingpipetsofprecisionandgeneralpurposegrades,usedinmeasuringvolumesofliquids.1.2Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2E438SpecificationforGlassesinLaboratoryApparatusE542PracticeforCalibrationofLaboratoryVolumetricApparatusE671SpecificationforMaximumPermissibleThermalRe-sidualStressinAnnealedGlassLaboratoryApparatusE694SpecificationforLaboratoryGlassVolumetricAppa-ratusE920SpecificationforCommerciallyPackagedLaboratoryApparatusE921SpecificationforExportPackagedLaboratoryAppa-ratusE1133PracticeforPerformanceTestingofPackagedLabo-ratoryApparatusforUnitedStatesGovernmentProcure-mentsE1157SpecificationforSamplingandTestingofReusableLaboratoryGlasswareE1273SpecificationforColorCodingofReusableLabora-toryPipets3.Classification3.1Style,Class,andCapacity—Pipetscoveredbythisspecificationshallbeofthefollowingstyles,classes,andcapacities:3.1.1Style1—Standardtapertip.3.1.1.1ClassA—Eachpipetofprecisiongradeshallbemarkedwiththeletter“A”tosignifycompliancewithappli-cableconstructionandaccuracyrequirementsinTable1.Eachpipetmaybemarkedwithapermanentserialnumberattheoptionofthemanufacturer.3.1.1.2ClassB—GeneralpurposepipetsareofthesamebasicdesignasClassApipets.VolumetrictolerancesforClassBpipetsshallbewithintwicethespecifiedrangeallowedforClassApipets.Thesep...
