MIL-V-3C
时间:2024-05-09 18:27:02 来源: 标准资料网 作者：标准资料网 阅读：9240
MIL-V-3C, MILITARY SPECIFICATION: VALVES, FITTINGS, AND FLANGES (EXCEPT FOR SYSTEMS INDICATED HEREIN); PACKAGING OF (08 MAR 1960) [SUPERSEDING MIL-P-3B]., This specification covers the requirements for the packaging (preservation, packing, and marking) of hardware valves such as globe valves, angle valves, check valves, cross valves, cylinder valves, gate valves, relief valves, and associated fittings and flanges for shipment and storage. This document does not provide packaging requirements for valves, fittings, and flanges intended for use in gas generating, fluid, and pneumatic systems with cleanliness and preservation requirement standards exceeding those specified herein.
【英文标准名称】:StandardTestMethodforMicronaireReadingofCottonFibers
【原文标准名称】:棉纤维的马克隆尼读数的标准试验方法
【标准号】:ASTMD1448-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:D13.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:棉花;细度;马克隆尼气流式纤维细度测试仪读数;气流阻力;棉布/纤维;成熟度-棉纤维;纱线支数
【英文主题词】:cotton;fineness;micronairereading;Airflowresistance;Cottonfabrics/fibers;Maturity--cottonfibers;Yarnnumber
【摘要】:Thistestmethodisconsideredsatisfactoryforacceptancetestingwhenthelevelsofthelaboratoriesarecontrolledbytheuseofthesamereferencestandardcottonsamplesbecausethecurrentestimatesofbetween-laboratoryprecisionareacceptableundertheseconditions.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,ensurethetestsamplestobeusedareashomogeneousaspossible,aredrawnfromthematerialfromwhichthedisparatetestresultswereobtained,andarerandomlyassignedinequalnumberstoeachlaboratoryfortesting.Thetestfromthetwolaboratoriesshouldbecomparedusingastatisticaltestforunpaireddata,ataprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Themicronairereadingofcottonfibersisafunctionofbothfinenessandmaturityandisrelatedtomillprocessingperformanceandtothequalityoftheendproducts.Factorscorrelatedwithmicronairereadingincludecleaningefficiency,neppiness,andthestrengthanduniformityoftheyarn.Note28212;Amodificationofthistestmethodisusedincommercialtradingtoselectbaleswhichwillconformtocontractguaranteesforspecifiedmicronairereadings(refertoD5867).Forthispurpose,itisusualpracticetotestonlyonespecimenpersample.1.1Thistestmethodcoversthedeterminationofthemicronairereadingofloosecottonfibersbymeasuringtheresistanceofaspecificmass(plug)ofcottonfiberstoairflowunderprescribedconditions.Note18212;Forothermethodsfordeterminingthefinenessoffibersbasedontheair-flowprinciple,refertoTestMethodD1449,TestMethodforSpecificAreaandImmaturityRatioofCottonFibers(ArealometerMethod),andtoTestMethodD1282,TestMethodforResistancetoAirFlowasanIndicationofAverageFiberDiameterofWoolTop,CardSliver,andScouredWool.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W10
【国际标准分类号】:59_060_10
【页数】:3P.;A4
【正文语种】: