MIL-I-24783
作者:标准资料网 时间:2024-05-01 08:40:00 浏览:9044
来源:标准资料网
MIL-I-24783, MILITARY SPECIFICATION, ISOLATOR, RING TYPE, PRESSURE, FOR SHIPBOARD SEWAGE SERVICE (15 APR 1993)., This specification covers the requirements for ring and flanged spool type isolators, installed between pipe flanges, to isolate pressure and vacuum gauges from clogging by sediment and solids in shipboard sewage systems.
【英文标准名称】:TestMethodsforSpallingResistanceofPorcelainEnameledAluminum
【原文标准名称】:铝制搪瓷涂层的抗脱落试验方法
【标准号】:ASTMC703-1972
【标准状态】:现行
【国别】:美国
【发布日期】:1972
【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】:瓷漆的;剥离;耐力;金属;瓷器制品;覆层;试验;铝
【英文主题词】:enamelled;testing;spalling;resistance;aluminium;coatings;porcelain;metals
【摘要】:
【中国标准分类号】:Y26
【国际标准分类号】:25_220_50
【页数】:3P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforApparentBendingModulusofPlasticsbyMeansofaCantileverBeam
【原文标准名称】:用悬臂梁法对塑料表观弯曲系数的标准试验方法
【标准号】:ASTMD747-2002
【标准状态】:现行
【国别】:
【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(ASTM)
【起草单位】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;塑料
【英文主题词】:apparentbendingmodulus;bendingmovement;cantileverbeam;stiffness;
【摘要】:Thistestmethodprovidesameansofderivingtheapparentbendingmodulusofamaterialbymeasuringforceandangleofbendofacantileverbeam.Themathematicalderivationassumessmalldeflectionsandpurelyelasticbehavior.Underactualtestconditions,thedeformationhasbothelasticandplasticcomponents.Thistestmethoddoesnotdistinguishorseparatethese,andhenceatrueelasticmodulusisnotcalculable.Instead,anapparentvalueisobtainedandisdefinedastheapparentbendingmodulusofthematerial.ThetangentmodulusobtainedbyTestMethodsD790ispreferred,whenthematerialcanbetestedbytheTestMethodsD790testprocedure.Becauseofdeviationsfrompurelyelasticbehavior,changesinspanlength,width,anddepthofthespecimenwillaffectthevalueoftheapparentbendingmodulusobtained;therefore,valuesobtainedfromspecimensofdifferentdimensionsmaynotnecessarilybecomparable.Rateofloadingiscontrolledonlytotheextentthattherateofangularchangeoftherotatingjawisfixedat58to66x00B0;/min.Actualrateofstressingwillbeaffectedbyspanlength,width,depthofthespecimen,andweightofthependulum.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationSystemD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Note28212;Adiscussionofthetheoryofobtainingapurelyelasticbendingmodulus,usingacantileverbeamtestingapparatus,canbefoundinAppendixX1.Theresultsobtainedunderactualtestconditionswillbetheapparentbendingmodulus.1.1Thistestmethodcoversthedeterminationoftheapparentbendingmodulusofplasticsbymeansofacantileverbeam.Itiswellsuitedfordeterminingrelativeflexibilityofmaterialsoverawiderange.ItisparticularlyusefulformaterialstooflexibletobetestedbyTestMethodsD790.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoknownISOequivalentforthisstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:5P.;A4
【正文语种】: