Product Code:SAE AS28912
Title:Bearing, Roller, Self-Aligning, Single Row Airframe, Anti-Friction, Sealed, Type I (Cancelled Jul 2004)
Issuing Committee:Acbg Rolling Element Bearing Committee
Scope:No scope available.【英文标准名称】:StandardTestMethodforMoistureinWoolbyOven-Drying
【原文标准名称】:用炉烘干法测定羊毛内水分的试验方法
【标准号】:ASTMD1576-1990(2001)
【标准状态】:现行
【国别】:
【发布日期】:1990
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D13.13
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:纺织材料;纺织纤维;试验;羊毛;水分
【英文主题词】:moisturecontentandwool;
【摘要】:TestMethodD2462forthedeterminationofthemoistureinwoolbydistillationwithtolueneisthepreferredmethodfortestingwoolformoisturefortheacceptancetestingofcommercialshipments.If,however,thepurchaserandthesupplieragree,TestMethodD1576forthedeterminationofthemoistureinwoolbyovendryingmaybeusedinstead.Comparativetestsasdirectedin5.1.1,maybeadvisable.5.1.1IncaseofadisputearisingfromdifferencesinreportedtestresultswhenusingTestMethodD1576foracceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogeneousaspossibleandwhicharefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent’t-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.Thistestmethodisasimpleandconvenientmethodforroutineprocesscontrol,in-plantevaluation,estimationofmoisturecontentofalotofwool,oranyotherpurposeforwhichahighdegreeofreproducibilityisnotnecessary(seeSection13).1.1Thistestmethodcoversthedeterminationoftheamountofmoisturepresentinordinarycommercialandindustrialsamplesofwoolinallformsexceptgreasewool,usingtheoven-dryingtechnique.1.2Formulasforcalculatingthemoisturecontent(as-receivedbasis)andmoistureregain(oven-driedbasis)aregiven.Itisalwaysimportanttousethecorrecttermwhichcorrespondstothebasisusedinthecalculation(see12.2.1).Note1--ThedeterminationofmoisturecontentfortextilematerialsingeneraliscoveredinTestMethodsD2654,andanoptimalmethodfordeterminingthemoistureinwoolbydistillationwithtolueneiscoveredinTestMethodD2462.AmethodforsamplingwoolforthedeterminationofmoistureinwooliscoveredinPracticeD2525.Theoven-dryingmethodhasbeenadaptedforcottoninTestMethodD2495.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W21
【国际标准分类号】:59_060_10
【页数】:4P.;A4
【正文语种】: