ASTM D3089-1997(2008) 测量气溶胶阀填料斜管A-D尺寸的标准实施规程

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【英文标准名称】:StandardPracticeforDeterminingtheA-DDimensionofAerosolValveDipTubes
【原文标准名称】:测量气溶胶阀填料斜管A-D尺寸的标准实施规程
【标准号】:ASTMD3089-1997(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D10.33
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:A-Ddimensionmeasurementinaerosolpackaging;aerosoldiptubemeasurement;measurementofdiptubesinaerosolpackaging;A-Ddimension;Aerosolcontainers/products
【摘要】:Usingdiptubesofthecorrectlengthishelpfulbyenablingtheusertodischargeessentiallyalltheproductfromthedispenser,preventingthetubefrombecomingjammedintoanincorrectpositionasaresultofgassing,preventingthe(non-dimpled)valvecupfromexcessivelyprotrudingfromthecanplugandperhapscausingproductionproblemsatthecrimperorgasser/crimper,andpreventingthetubefrombottomingontheflatbaseofsomealuminumcansinsuchawaythatasealismadethatwillacttolimitorstoptheentryofproductintothetubewhenthevalveisactuated.Diptubesthatextendfullytothebottomofthedispenser,withoutexcessivedistortion,canalsoaidinretainingtheirconnectiontothevalvebodytailpiece,whichmaybeimportantiftheaerosolcontentexertsaverysignificantswellingactionuponthediptubeplastic.ThechoiceofA-Ddimensionisinfluencedbyanumberoffactors.Thesefactorsinclude:Tubecurvature,whichmayvaryconsiderablybetweentubes.Variationofvalvecupandvalvecupgasketthickness.Elevationorsuppressionofthevalvepedestal(thustopendofthediptube)uponcrimping.Elevationofvalvepedestalduringhot-tanking,onlypartlydiminisheduponsubsequentcooling.Swelling(orshrinking)actionoftheproductonthediptube.1.1ThispracticecoverstherapiddeterminationoftheA-Ddimensiondefinedasthecenterlinedimensionfromthetopplaneofthevalvemountingcupcurltothefarendofthediptube.SeeFig.1.1.2Thispracticeislimitedtovalveswith1-in.(25.4-mm)mountingcups.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.
【中国标准分类号】:A82
【国际标准分类号】:55_130
【页数】:3P.;A4
【正文语种】:英语