HB 3396-1982 镶硬质合金刀片的内排屑深孔镗刀 D=65~72mm
时间:2024-04-29 17:57:55 来源: 标准资料网 作者:标准资料网 阅读:8282
基本信息
标准名称: | 镶硬质合金刀片的内排屑深孔镗刀 D=65~72mm |
中标分类: |
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发布日期: | 1982-07-23 |
实施日期: | 1982-10-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 3页 |
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所属分类:
【英文标准名称】:Shellboilers-Part8:Requirementsforsafeguardsagainstexcessivepressure;GermanversionEN12953-8:2001
【原文标准名称】:壳体锅炉.第8部分:防止超压的安全装置要求;德文版本EN12953-8:2001
【标准号】:DINEN12953-8-2002
【标准状态】:现行
【国别】:德国
【发布日期】:2002-04
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:质量要求;监督(认可);安全装置;安全工程;大型锅炉;排出管;过大压力;产生蒸汽;水;维修;热风机;导则;安全;压力容器;蒸汽锅炉;监测用装置;大水容量锅炉;调查;压力释放;规范(验收);设计;交货条件;发电站;规范;槽;蒸汽发
【英文主题词】:
【摘要】:
【中国标准分类号】:J98
【国际标准分类号】:27_060_30
【页数】:8P;A4
【正文语种】:德语
【英文标准名称】:StandardTestMethodforCreepofConcreteinCompression
【原文标准名称】:受压中混凝土蠕变的标准试验方法
【标准号】:ASTMC512/C512M-2010
【标准状态】:现行
【国别】:
【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】:C09.61
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:压缩;混凝土;蠕变;蠕变应力;弹性应变
【英文主题词】:compression;concrete;creep;creepstrain;elasticstrain
【摘要】:Thistestmethodmeasurestheload-inducedtime-dependentcompressivestrainatselectedagesforconcreteunderanarbitrarysetofcontrolledenvironmentalconditions.Thistestmethodcanbeusedtocomparecreeppotentialsofdifferentconcretes.Aprocedureisavailable,usingthedevelopedequation(orgraphicalplot),forcalculatingstressfromstraindatawithinmassivenon-reinforcedconcretestructures.Formostspecificdesignapplications,thetestconditionssetforthhereinmustbemodifiedtomorecloselysimulatetheanticipatedcuring,thermal,exposure,andloadingageconditionsfortheprototypestructure.CurrenttheoriesandeffectsofmaterialandenvironmentalparametersarepresentedinACISP-9,SymposiumonCreepofConcrete.Intheabsenceofasatisfactoryhypothesisgoverningcreepphenomena,anumberofassumptionshavebeendevelopedthathavebeengenerallysubstantiatedbytestandexperience.Creepisproportionaltostressfrom0to40%ofconcretecompressivestrength.Creephasbeenconclusivelyshowntobedirectlyproportionaltopastecontentthroughouttherangeofpastecontentsnormallyusedinconcrete.Thus,thecreepcharacteristicsofconcretemixturescontainingaggregateofmaximumsizegreaterthan50mm[2in.]maybedeterminedfromthecreepcharacteristicsoftheminus50-mm[minus2-in.]fractionobtainedbywet-sieving.Multiplythevalueofthecharacteristicbytheratioofthecementpastecontent(proportionbyvolume)inthefullconcretemixturetothepastecontentofthesievedsample.Theuseofthelogarithmicexpression(Section8)doesnotimplythatthecreepstrain-timerelationshipisnecessarilyanexactlogarithmicfunction;however,fortheperiodofoneyear,theexpressionapproximatesnormalcreepbehaviorwithsufficientaccuracytomakepossiblethecalculationofparametersthatareusefulforthepurposeofcomparingconcretes.Therearenodatathatwouldsupporttheextrapolationoftheresultsofthistesttotensionortorsion.1.1Thistestmethodcoversthedeterminationofthecreepofmoldedconcretecylinderssubjectedtosustainedlongitudinalcompressiveload.Thistestmethodislimitedtoconcreteinwhichthemaximumaggregatesizedoesnotexceed50mm[2in.].1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:5P.;A4
【正文语种】: