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【英文标准名称】:StandardTestMethodsforQuantitativeAnalysisofTextiles
【原文标准名称】:纺织品定量分析的标准试验方法
【标准号】:ASTMD629-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D13.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Acceptancecriteria/testing--textilefabrics/fibers;Animalfibers;Bastandleaffibers/products;Celluloseandcellulosederivatives;Cellulosefiber;Chemicalproperties--textiles;Compositionanalysis--textiles;Cottonfibers;Cross-sectionmeasuremen
【摘要】:TestMethodsD629forthedeterminationofquantitativeanalysisoftextilesmaybeusedforacceptancetestingofcommercialshipmentsbutcautionisadvisedsinceinformationonbetween-laboratoryprecisionislacking.Comparativetestsasdirectedin5.1.1orbyTableD1909maybeadvisable.IncaseofadisputearisingfromdifferencesinreportedtestresultsusingTestMethodsD629foracceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogeneousaspossibleandwhicharefromalotofmaterialofthetypeinquestion.Thetestspecimenshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingbegan.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandsuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.Theeffectsofthevariousreagentsusedinthechemicalmethodsontheresidualfibersinablenddependuponthehistoryofthefibersand,unlessotherwisestated,aregenerallytoosmallortoouncertaintowarranttheapplicationofcorrectionfactors.Fibercompositionisgenerallyexpressedeitherontheoven-drymassoftheoriginalsampleortheoven-drymassofthecleanfiberaftertheremovalofnonfibrousmaterials.Ifnonfibrousmaterialsarenotfirstremovedfromthetextilebeforethefiberanalysisiscarriedout,orifthetreatmentsdescribedinSection8areincapableofremovingthem,anysuchmaterialspresentwillincreasethepercentageofthefiberconstituentwithwhichtheyareremovedduringtheanalysis,assumingtheyaresolubleinthesolventused.Theanalyticalmethodsareintendedprimarilyfortheseparationofbinarymixturesoffibers.Theseproceduresmayalsobeusedfortheanalysisofmixturescontainingmorethantwotypesoffibersbyselectingthebestcombinationofmethodstouse(Table1).Sinceasequenceofsolventsonagivenfibermayproducedifferentresultsthantheexpectedresultsfromasinglesolvent,itisadvisabletodeterminetheresultsofsuchsequentialeffectswhentestingmultiplefiberblends.Itissometimesmoreconvenienttoseparatemechanicallytheyarnsinatextilewhichareofsimilartypes,andthenusetheappropriatechemicalmethodtoanalyzeeachofthecomponents.Table2showsthesolubilitiesofthevariousfibersindifferentchemicalreagents.1.1Thesetestmethodscoverproceduresforthedeterminationofthefiberblendcompositionofmixturesofthefiberslistedin1.2.Proceduresforquantitativeestimationoftheamountofmoistureandcertainnonfibrousmaterialsintextilesarealsodescribed,foruseintheanalysisofmixtures,butthesearenottheprimarymethodsforthedeterminationofmoisturecontentforcommercialweights.
【中国标准分类号】:W55
【国际标准分类号】:59_080_01
【页数】:22P.;A4
【正文语种】:英语


【英文标准名称】:Hexagonheadboltsforstructuralsteelboltingforsupplywithnut
【原文标准名称】:钢结构用带六角螺母的六角头螺栓
【标准号】:DIN7990-1989
【标准状态】:作废
【国别】:德国
【发布日期】:1989-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:六角头螺钉;ISO米制螺纹;六角头紧固件;螺母;砝码;钢结构作业;紧固件;特性;材料;钢;验收规范;材料强度;螺钉;公差;尺寸;结构;螺纹
【英文主题词】:fasteners;structuralsteelwork;weights;structures;screws(bolts);properties;dimensions;tolerances(measurement);steels;acceptancespecification;threads;isometricthreads;hexagonal-headfasteners;nut
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:4030;3920
【页数】:6P;A4
【正文语种】:德语