ASTM F 837Ma-2002 不锈钢凹头螺钉螺丝的标准规范(米制)
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来源:标准资料网
【英文标准名称】:StandardSpecificationforStainlessSteelSocketHeadCapScrews[Metric]
【原文标准名称】:不锈钢凹头螺钉螺丝的标准规范(米制)
【标准号】:ASTMF837Ma-2002
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:六角(边)形;平头螺钉;紧固件;钢
【英文主题词】:hexagonsocketscrews;stainless;steels;countersunkheadscrews;metric;fasteners;hexagon;panheadscrews
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:21_060_10
【页数】:8P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforEntanglementsinUntwistedFilamentYarnsbyNeedleInsertion
【原文标准名称】:针入法测定反捻长丝纱的缠结度的标准试验方法
【标准号】:ASTMD4724-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:entanglement;yarn;Acceptancecriteria/testing--textilefabrics/fibers;Averagecentimeterpull;Entanglement;Fiberlength;Filamentyarn;Forwardingtime;Instrumentalmeasurement--textiles;Integritytesting;Man-madetextilefibers;Manualmethod;M
【摘要】:Option1ofthistestmethodforthedeterminationofthedegreeofuntwistedfilamentyarnentanglement,asmeasuredinstrumentally,isusedforacceptancetestingofcommercialshipments;however,cautionisadvisedbecauseinformationonbetween-laboratoryprecisionislacking.Comparativetests,asdirectedin5.1.1,maybeadvisable.Iftherearedifferencesofpracticalsignificancebetweenthereportedtestresultsfortwoormorelaboratories,comparativetestsshouldbeperformedbythoselaboratoriestodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,samplesusedforeachcomparativetestshouldbeashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultsindisparateresultsduringinitialtesting,andrandomlyassignedinequalnumberstoeachlaboratory.Otherfabricswithestablishedtestvaluesmaybeusedforthispurpose.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedappropriatestatisticalanalysisandaprobabilitylevelchosenbythetwopartiesbeforetestingbegins,ataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorfuturetestresultsmustbeadjustedinconsiderationoftheknownbias.Option2forthistestmethodisintendedforusewhenthesupplyofyarnislimited.Theinstrumentaloptionofthistestmethodisbasedonthetotalrandomizationoftheentanglementsintheyarn;therefore,thedistancemeasuredbetweenthepointofinsertionofapininthemiddleoftheyarnandthepointatwhichanentanglementisencountered,bymovementoftheyarnorthepinuntilitisstoppedatapresetlevelofforce,isrepresentativeofthedistancebetweentwoentanglementsatsomelocationintheyarn.Entanglementsareusedfrequentlyinsteadoftwisttoensuretheintegrityoffilamentyarns.Suchentanglementsgenerallygivesomewhatlessprotectionduringweavingorknittingthantwist,butwithpropercare,willperformquitesatisfactorily.1.1Thistestmethodcoverstwooptionsforthemeasurementofentanglementsinuntwistedfilamentyarnsusingneedleinsertionoptionsforinstrument(A)andmanual(B)techniques.1.2ThevaluesstatedineitherSIorinch-poundunits(inparentheses)aretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheotherwithoutcombiningvaluesinanyway.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W58
【国际标准分类号】:59_080_20
【页数】:6P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 单螺杆塑料挤出机 |
| 中标分类： |
化工 >>
化工机械与设备 >>
橡胶、塑料用机械 |
| 替代情况： | 被JB/T 8061-1996代替 |
| 发布日期： | |
| 实施日期： | 1994-10-25 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
适用范围
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所属分类： 化工 化工机械与设备 橡胶 塑料用机械
