QJ 2314.4-1992 通用槽形弯曲模(L ≤ 1200mm)凹模
作者:标准资料网 时间:2024-04-16 20:03:32 浏览:9846
来源:标准资料网
基本信息
| 标准名称： | 通用槽形弯曲模(L ≤ 1200mm)凹模 |
| 中标分类： |
航空、航天 >>
航空器与航天器制造用设备 >>
模具 |
| ICS分类： |
机械制造 >>
无屑加工设备 >>
模制设备和铸造设备
|
| 发布日期： | 1992-03-02 |
| 实施日期： | 1992-11-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 航空 航天 航空器与航天器制造用设备 模具 机械制造 无屑加工设备 模制设备和铸造设备
【英文标准名称】:StandardTestMethodforTrueSpecificGravityofRefractoryMaterialsbyGas-ComparisonPycnometer
【原文标准名称】:用气体比重法测定耐火材料真实比重的标准试验方法
【标准号】:ASTMC604-2002(2007)e1
【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(US-ASTM)
【起草单位】:C08.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:gascomparisonpycnometer;hydratablematerials;refractorymaterials;truespecificgravity;Gascomparisonpycnometer;Refractories(general);Specificgravity--refractorymaterials;Truespecificgravity
【摘要】:Thetruespecificgravityofamaterialistheratioofitstruedensity,determinedataspecifictemperature,tothetruedensityofwater,determinedataspecifictemperature.Thus,thetruespecificgravityofamaterialisaprimarypropertywhichisrelatedtochemicalandmineralogicalcomposition.ThistestmethodisparticularlyusefulforhydratablematerialswhicharenotsuitablefortestwithTestMethodC135.Forrefractoryrawmaterialsandproductsthetruespecificgravityisausefulvaluefor:classification,detectingdifferencesinchemicalcompositionbetweensupposedlylikesamples,indicatingmineralogicalphasesorphasechanges,calculatingtotalporositywhenthebulkdensityisknown,andforanyothertestmethodthatrequiresthisvalueforthecalculationofresults.Thistestmethodisaprimarystandardmethodwhichissuitableforuseinspecifications,qualitycontrol,andresearchanddevelopment.Itcanalsoserveasarefereetestmethodinpurchasingcontractsoragreements.Fundamentalassumptionsinherentinthistestmethodarethefollowing:Thesampleisrepresentativeofthematerialingeneral,Thetotalsamplehasbeenreducedtotheparticlesizespecified,Nocontaminationhasbeenintroducedduringprocessingofthesample,Theignitionofthesamplehaseliminatedallfreeorcombinedwaterwithoutinducingsinteringoralteration,Aninertgas(helium)hasbeenusedinthetest,andThetestmethodhasbeenconductedinameticulousmanner.Deviationfromanyoftheseassumptionsnegatestheusefulnessoftheresults.IninterpretingtheresultsofthistestmethoditmustberecognizedthatthespecifiedsampleparticlesizeissignificantlyfinerthanspecifiedforTestMethodC135.Eventhisfinerparticlesizeforthesampledoesnotprecludethepresenceofsomeclosedpores,andtheamountofresidualclosedporesmayvarybetweenmaterialsorevenbetweensamplesofthesameorlikematerials.Thevaluesgeneratedbythistestmethodmay,therefore,beverycloseapproximationsratherthanaccuraterepresentationsoftruespecificgravities.Thus,comparisonsofresultsshouldonlybejudiciouslymadebetweenlikematerialstestedbythistestmethodorwithfullrecognitionofpotentiallyinherentdifferencesbetweenthematerialsbeingcomparedorthetestmethodused.1.1Thistestmethodcoversthedeterminationofthetruespecificgravityofsolidmaterials,andisparticularlyusefulformaterialsthateasilyhydratewhicharenotsuitablefortestwithTestMethodC135.ThistestmethodmaybeusedasanalternateforTestMethodC135,TestMethodC128,andTestMethodC188fordeterminingtruespecificgravity.1.2Units8212;ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception8212;In7.3theequivalentSIunitisexpressedinparenthesis.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q40
【国际标准分类号】:81_080
【页数】:3P.;A4
【正文语种】:英语
【英文标准名称】:Laboratorybioriskmanagement.GuidelinesfortheimplementationofCWA15793:2008
【原文标准名称】:实验室生物安全管理.实施CWA15793:2008标准的导则
【标准号】:BSCWA16393-2012
【标准状态】:现行
【国别】:英国
【发布日期】:2012-01-25
【实施或试行日期】:2012-01-25
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Assessment;Biologicalmaterials;Biology;Biosecurity;Danger;Dangerousmaterials;Hazards;Laboratories;Lifesciences;Management;Risk;Safety;Securitymanagement;Workplacesafety
【摘要】:
【中国标准分类号】:C04
【国际标准分类号】:07_100_01
【页数】:76P;A4
【正文语种】:英语
