基本信息
| 标准名称： | ３ＤＧ１０２型ＮＰＮ硅外延平面高频小功率三极管 |
| 英文名称： | Detail specification for silicon NPN epitaxial planar high frequency low power transistors,Type 3DG102 |
| 中标分类： |
能源、核技术 >>
能源、核技术综合 >>
技术管理 |
| 发布日期： | 1974-10-01 |
| 实施日期： | 1974-10-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 8页 |
适用范围
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前言
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引用标准
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所属分类： 能源 核技术 能源 核技术综合 技术管理
【英文标准名称】:StandardPracticeforUltrasonicExaminationofMetalPipeandTubing
【原文标准名称】:金属管道超声检验的标准实施规范
【标准号】:ASTME213-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E07.06
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:超声检验;无损检验;管;工艺;管;金属;试验
【英文主题词】:anglebeam;nondestructiveexamination;pipe;tubing;ultrasonicexamination
【摘要】:Thepurposeofthispracticeistooutlineaprocedurefordetectingandlocatingsignificantdiscontinuitiessuchaspits,voids,inclusions,cracks,splits,etc.,bytheultrasonicpulse-reflectionmethod.1.1Thispracticecoversaprocedurefordetectingdiscontinuitiesinmetalpipeandtubingduringavolumetricexaminationusingultrasonicmethods.Specifictechniquesoftheultrasonicmethodtowhichthispracticeappliesincludepulse-reflectiontechniques,bothcontactandnon-contact(forexample,asdescribedinGuideE1774),andanglebeamimmersiontechniques.Artificialreflectorsconsistingoflongitudinal,and,whenspecifiedbytheusingpartyorparties,transversereferencenotchesplacedonthesurfacesofareferencestandardareemployedastheprimarymeansofstandardizingtheultrasonicsystem.1.2Thispracticeisintendedforusewithtubularproductshavingoutsidediametersapproximately1/2in.[12.7mm]andlarger,providedthattheexaminationparameterscomplywithandsatisfytherequirementsofSection12.Theseprocedureshavebeensuccessfulwithsmallersizes.Thesemaybespecifieduponcontractualagreementbetweentheusingparties.Theseproceduresareintendedtoensurethatproperbeamanglesandbeamshapesareusedtoprovidefullvolumecoverageofpipesandtubes,includingthosewithlowratiosofoutsidediameter-to-wallthickness,andtoavoidspurioussignalresponseswhenexaminingsmall-diameter,thin-walltubes.1.3TheprocedureinAnnexA1isapplicabletopipeandtubingusedinnuclearandotherspecialandsafetyapplications.TheprocedureinAnnexA2maybeusedtodeterminethehelicalscanpitch.1.4Thispracticedoesnotestablishacceptancecriteria;theymustbespecifiedbytheusingpartyorparties.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.TheSIequivalentsareinbracketsandmaybeapproximate.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:23_040_10
【页数】:11P.;A4
【正文语种】: