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ASTM A290/A290M-2005(2010) 减速齿轮齿圈用碳素钢及合金钢锻件用标准规范

作者:标准资料网 时间:2024-05-14 13:20:59  浏览:9259   来源:标准资料网
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【英文标准名称】:StandardSpecificationforCarbonandAlloySteelForgingsforRingsforReductionGears
【原文标准名称】:减速齿轮齿圈用碳素钢及合金钢锻件用标准规范
【标准号】:ASTMA290/A290M-2005(2010)
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:A01.06
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:合金钢锻件;碳钢锻件;齿圈;热处理的;减速齿轮装置;合金钢锻件-规范;碳钢锻件-规范;齿轮;减速齿轮-规范;钢齿轮
【英文主题词】:alloysteelforgings;carbonsteelforgings;gearrings;heat-treated;reductiongears;Alloysteelforgings--specifications;Carbonsteelforgings--specifications;Gears;Reductiongears--specifications;Steelgears
【摘要】:1.1Thisspecificationcoversnormalizedandtempered,andquenchedandtempered,carbonandalloysteelforgedorrolledringsforreductiongears.1.2Severalgradesandclassesofsteelarecoveredasfollows:1.2.1Grade1,ClassesAandB,andGrade2,ClassesCandD,arecarbonsteel.1.2.2Grade3,ClassesEandF,Grade4,ClassesG,H,I,J,KandL,Grade5,ClassesMandP,andGrade6,ClassT,arealloysteel.1.2.3Allgradesandclassesareconsideredweldableunderproperconditions.Weldingtechniquesareoffundamentalimportanceanditispre-supposedthatweldingprocedureandinspectionwillbeinaccordancewithpropermethodsfortheclassofmaterialused.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.
【中国标准分类号】:H40
【国际标准分类号】:77_140_85
【页数】:3P.;A4
【正文语种】:


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【英文标准名称】:SpecificationforWireboundConstruction,CannedFoodsBoxes
【原文标准名称】:铺屋面,防潮与防水用硬煤沥青
【标准号】:ASTMD45
【标准状态】:作废
【国别】:
【发布日期】:
【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】:
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:屋顶层;密封;焦油;屋顶;煤焦油;施工材料;水密材料;建筑
【英文主题词】:
【摘要】:
【中国标准分类号】:Q17
【国际标准分类号】:
【页数】:
【正文语种】:


【英文标准名称】:StandardTestMethodforConcentrationLimitsofFlammabilityofChemicals(VaporsandGases)
【原文标准名称】:化学药品易燃浓缩限度的测试方法
【标准号】:ASTME681-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E27.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Chemicalanalysis--chemicals;Chemicals(fire/flammabilitytesting);Flammability--chemicals;Hazardassessment/potential--liquidchemicals;HCFC(hydrochlorofluorocarbon);Ignition--chemicals;Limitsofflammability(ofchemicals);Vaporphaseanalysis/p
【摘要】:TheLFLandUFLofgasesandvaporsdefinetherangeofflammableconcentrationsinair.5.2ThismethodmeasurestheLFLandUFLforupward(andpartiallyoutward)flamepropagation.Thelimitsfordownwardflamepropagationarenarrower.Limitsofflammabilitymaybeusedtodetermineguidelinesforthesafehandlingofvolatilechemicals.Theyareusedparticularlyinassessingventilationrequirementsforthehandlingofgasesandvapors.NFPA69providesguidanceforthepracticaluseofflammabilitylimitdata,includingtheappropriatesafetymarginstouse.5.4AsdiscussedinBrandesandUral,thereisafundamentaldifferencebetweentheASTMandEuropeanmethodsforflammabilitydetermination.TheASTMmethodsaimtoproducethebestrepresentationofflammabilityparameters,andrelyuponthesafetymarginsimposedbytheapplicationstandards,suchasNFPA69.Ontheotherhand,Europeantestmethodsaimtoresultinaconservativerepresentationofflammabilityparameters.Forexample,inthisstandard,LFListhecalculatedaverageofthelowestgoandhighestno-goconcentrationswhiletheEuropeantestmethodsreporttheLFLastheminimumofthe5highestno-goconcentrations.Note28212;Forhydrocarbons,thebreakpointbetweennonflammabilityandflammabilityoccursoveranarrowconcentrationrangeatthelowerflammabilitylimit,butthebreakpointislessdistinctattheupperlimit.Formaterialsfoundtobenon-reproducibleper13.1.1thatarelikelytohavelargequenchingdistancesandmaybedifficulttoignite,suchasammoniaandcertainhalogenatedhydrocarbon,thelowerandupperlimitsofthesematerialsmaybothbelessdistinct.Thatis,awiderrangeexistsbetweenflammableandnonflammableconcentrations(seeAnnexA1).1.1Thistestmethodcoversthedeterminationofthelowerandupperconcentrationlimitsofflammabilityofchemicalshavingsufficientvaporpressuretoformflammablemixturesinairatatmosphericpressureatthetesttemperature.Thistestmethodmaybeusedtodeterminetheselimitsinthepresenceofinertdilutiongases.Nooxidantstrongerthanairshouldbeused.Note18212;Thelowerflammabilitylimit(LFL)andupperflammabilitylimit(UFL)aresometimesreferredtoasthelowerexplosivelimit(LEL)andtheupperexplosivelimit(UEL),respectively.However,sincethetermsLELandUELarealsousedtodenoteconcentrationsotherthanthelimitsdefinedinthistestmethod,onemustexaminethedefinitionscloselywhenLELandUELvaluesarereportedorused.1.2Thistestmethodisbasedonelectricalignitionandvisualobservationsofflamepropagation.Usersmayexperienceproblemsiftheflamesaredifficulttoobserve(forexample,irregularpropagationorinsufficientluminescenceinthevisiblespectrum),ifthetestmaterialrequireslargeignitionenergy,orifthematerialhaslargequenchingdistances.1.3AnnexA1providesamodifiedtestmethodformaterials(suchascertainamines,halogenatedmaterials,andthelike)withlargequenchingdistanceswhichmaybedifficulttoignite.1.4Inothersituationswherestrongignitionsources(suchasdirectflameignition)isconsideredcredible,theuseofatestmethodemployinghigherenergyignitionsourceinasufficientlylargepressurechamber(analogous,forexample,tothemethodsinTestMethodE2079formeasuringlimitingoxygenconcentration)maybemoreappropriate.Inthiscase,expertadvicemaybenecessary.1.5Theflammabilitylimitsdependonthetesttemperatureandpressure.Thistestmethodislimitedtoaninitialpressureofthelocalamb......
【中国标准分类号】:G04
【国际标准分类号】:71_080_01
【页数】:12P.;A4
【正文语种】:英语



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