ASTM B 344-1992 电加热元件用拉制或轧制镍铬及镍铬铁合金
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来源:标准资料网
【英文标准名称】:DrawnorRolledNickel-ChromiumandNickle-Chromium-IronAlloysforElectricalHeatingElements
【原文标准名称】:电加热元件用拉制或轧制镍铬及镍铬铁合金
【标准号】:ASTMB344-1992
【标准状态】:作废
【国别】:美国
【发布日期】:1992
【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】:铬;铁;镍;加热元件;金属;热电对流供暖;合金;电气工程
【英文主题词】:heatingelements;alloys;electricspaceheating;chromium;iron;nickel;electricalengineering;metals
【摘要】:
【中国标准分类号】:H42
【国际标准分类号】:77_140_90
【页数】:3P;A4
【正文语种】:英语
【英文标准名称】:PhotographicGradeHydrochloricAcid,HCl
【原文标准名称】:摄影级盐酸,HCl
【标准号】:ANSI/NAPMIT4.104-1980
【标准状态】:作废
【国别】:美国
【发布日期】:1980
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:材料;盐酸;药液;摄影
【英文主题词】:hydrochloricacid;photography;chemicals;materials
【摘要】:
【中国标准分类号】:G84
【国际标准分类号】:37_040_30
【页数】:3P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforWaterRetentionofTextileFibers(CentrifugeProcedure)
【原文标准名称】:纺织纤维的保水性用标准试验方法(离心机法)
【标准号】:ASTMD2402-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:试验;纺织纤维;纺织材料;蓄水
【英文主题词】:textilefibers;waterretention
【摘要】:Thistestmethodfortestingforwaterretentionoffibersaftercentrifugingisnotrecommendedforacceptancetestingofcommercialshipmentsbecausethetestismoreappropriatefordevelopmentandresearch.However,ifthetestistobeusedforacceptancetesting,comparativetestsasdescribedin5.1.1areadvised.5.1.1InthecaseofadisputearisingfromdifferencesinreportedtestresultsusingTestMethodD2402foracceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifstatisticalbiasesexistbetweentheirlaboratories.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogeneousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingtheStudentrsquo;t-testforunpaireddatawithanacceptableprobabilitylevelchosenbythetwopartieswhiledesigningthetestprogram.Iftheanalysisshowsabias,itscausemustbefoundandcorrected,orthepurchaserandsuppliermustagreetointerpretfuturetestdatawithconsiderationfortheknownbias.Theamountofwaterretainedbyafibermassincreaseswithanincreaseinthehydrophilictendencyofthefiber.Thusthedataobtainedcanbeusedtoindicatethefollowing:5.2.1Differencesinwaterretentionbetweenthevariousman-madeandnaturalfibers,5.2.2Degreeofcross-linkingincellulosicfibers,5.2.3Damageincurredbywoolandsilkfibersduetoalkalineprocessing,and5.2.4Persistenceofwater-repellenttreatments.FIG.1Cross-sectionViewofCentrifugeTubeAssembly1.1Thistestmethodcoversthemeasurementofwaterretentionofman-madeandnaturalfibersasstaple,tow,orfilamentandspunyarns.Itisintendedtogiveameasureoftheamountofwaterwhichcannotberemovedfromthoroughlywettedfibersolelybymechanicalmeansasappliedbycentrifugalforce(see3.2).Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,seeSection9.
【中国标准分类号】:W04
【国际标准分类号】:59_060_01
【页数】:4P.;A4
【正文语种】:
