ANSI/ASME B18.7-2007 通用半管形铆钉、全管形铆钉、开口铆钉和铆钉帽
作者:标准资料网 时间:2024-05-14 23:20:46 浏览:8499
来源:标准资料网
【英文标准名称】:GeneralPurposeSemi-TubularRivets,FullTubularRivets,SplitRivets,andRivetCaps
【原文标准名称】:通用半管形铆钉、全管形铆钉、开口铆钉和铆钉帽
【标准号】:ANSI/ASMEB18.7-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007-03-07
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:名称与符号;尺寸;紧固件;锁定装置及定位装置;铆钉帽;铆钉;半管形铆钉;公差(测量);管形铆钉
【英文主题词】:Designations;Dimensions;Fasteners;Lockingandlocatingdevices;Rivethead;Rivets;Semi-tubularrivets;Tolerances(measurement);Tubularrivets
【摘要】:Thisstandardcoverscompletegeneralanddimensionaldataforsemi-tubularrivets,fulltubularrivets,splitrivets,andrivetcapsforuseingeneralpurposeapplications.Theproductsdescribedaresuitableforjoiningmetallicandnonmetallicmaterialsorcombinationsthereof.Itshouldbenotedthatwhiletheseproductsaresuitableforgeneralpurposeassembly,otherspecialpurposetypesareavailabletosatisfyparticularrequirementsandmanufacturersshouldbeconsultedforspecialrequirements.Theinclusionofdimensionaldatainthisstandardisnotintendedtoimplythatalloftheproductsdescribedarestockproductionsizes.Consumersarerequestedtoconsultwithmanufacturersconcerningavailabilityofproducts.
【中国标准分类号】:J13
【国际标准分类号】:21_060_40
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforConductingErosionTestsbySolidParticleImpingementUsingGasJets
【原文标准名称】:用气体喷雾器的固体微粒冲击法实施侵蚀试验的标准试验方法
【标准号】:ASTMG76-2007
【标准状态】:现行
【国别】:美国
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:冲击;腐蚀;侵蚀腐蚀;冲击试验;金属;微粒;测试;磨损
【英文主题词】:Collisions;Corrosion;Erosioncorrosion;Impacttests;Metals;Particles;Testing;Wear
【摘要】:
【中国标准分类号】:H25
【国际标准分类号】:77_060
【页数】:6P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforMeasuringReactionRatesbyAnalysisofBarium-140FromFissionDosimeters
【原文标准名称】:通过分析由裂变剂量计产生的钡140来测定反应速率的试验方法
【标准号】:ASTME393-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E10.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Barium-140;fissiondosimeter;fissionproduct;fissionreactionrates;Barium;Fastneutronflux/fluence;Neutronactivationreactions;Radioactivation--fastneutronflux;Thresholddetectors--1.6MeV;Uranium-238fissionby-products
【摘要】:RefertoGuideE844fortheselection,irradiation,andqualitycontrolofneutrondosimeters.RefertoPracticeE261forageneraldiscussionofthemeasurementofneutronfluencerateandfluence.Theneutronspectrummustbeknowninordertomeasureneutronfluencerateswithasingledetector.Alsoitisnotedthatcrosssectionsarecontinuouslybeingreevaluated.ThelatestrecommendedcrosssectionsanddetailsonhowtheycanbeobtainedarediscussedinGuideE1018.Thereactionrateofadetectornuclideofknowncrosssection,whencombinedwithinformationabouttheneutronspectrum,permitsthedeterminationofthemagnitudeofthefluencerateimpingingonthedetector.Furthermore,ifresultsfromotherdetectorsareavailable,theneutronspectrumcanbedefinedmoreaccurately.ThetechniquesforfluencerateandfluencedeterminationsareexplainedinPracticeE261.140Baisaradioactivenuclideformedasaresultofuraniumfission.Althoughitisformedinfissionofanyheavyatom,therelativeyieldwilldiffer.Recommendedfissionyieldsfor140BaproductionaregiveninTable1.Thedirect(independent)fissionyieldofthedaughterproduct140La,whichiscounted,isgiveninTable2.Theseindependentfissionyieldsarerelativelylowcomparedtothe140Bacumulativefissionyieldandwillnotsignificantlyaffecttheaccuracyofthenondestructiveprocedureandneednotbeconsidered.Thehalf-lifeof140Bais12.752days.Itsdaughter140Lahasahalf-lifeof1.6781days.Thecomparativelylonghalf-lifeof140Baallowsthecountingtobedelayedseveralweeksafterirradiationinahigh-neutronfield.However,toachievemaximumsensitivitythedaughterproduct140Lashouldbecountedfivetosixdaysaftertheirradiationduringnondestructiveanalysisorfivetosixdaysafterchemicalseparationifthelattertechniqueisused.Analternativemethodafterchemicalseparationistocountthe140Badirectly.Becauseofits12.752dayhalf-lifeandsubstantialfissionyield,140Baisusefulforirradiationtimesuptoaboutsixweeksinmoderateintensityfields.Thenumberoffissionsproducedshouldbeapproximately109orgreaterforgoodcountingstatistics.Also,iftheirradiationtimeissubstantiallylongerthansixweeks,theneutronfluenceratedeterminedwillapplymainlytotheneutronfieldexistingduringthelatterpartoftheirradiation.The140Badecayconstantandyieldareknownmoreaccuratelythanthoseofmanyfissionproducts,soitissometimesusedasastandardorbasereactionwithwhichothermeasurementscanbenormalized.1.1Thistestmethoddescribestwoproceduresforthemeasurementofreactionratesbydeterminingtheamountofthefissionproduct140Baproducedbythenon-thresholdreactions235U(n,f),241Am(n,f),and239Pu(n,f),andbythethresholdreactions238U(n,f),237Np(n,f),and232Th(n,f).1.2Thesereactionsproducemanyfissionproducts,amongwhichis140Ba,havingahalf-lifeof12.752days.140Baemitsgammaraysofseveralenergies;however,thesearenoteasilydetectedinthepresenceofotherfissionproducts.Competingactivityfromotherfissionproductsrequiresthatachemicalseparationbeemployedorthatthe140Baactivitybedeterminedindirectlybycountingitsdaughterproduct140La.Thistestmethoddescribesbothprocedure(a),thenondestructivedeterminationof140Babythedirectcountingof140Laseveraldaysafterirradiation,andpro......
【中国标准分类号】:F46
【国际标准分类号】:17_240
【页数】:5P.;A4
【正文语种】:英语
