CECS 16-1990 预应力混凝土输水管结构设计规范(震动挤压工艺)
作者:标准资料网 时间:2024-05-16 16:12:09 浏览:8437
来源:标准资料网
基本信息
| 标准名称： | 预应力混凝土输水管结构设计规范(震动挤压工艺) |
| 中标分类： |
工程建设 >>
给水、排水工程 >>
室外给水、排水工程 |
| 替代情况： | 被CECS 140-2011代替并废止 |
| 发布日期： | 1990-09-10 |
| 实施日期： | 2004-05-01 |
| 首发日期： | |
| 作废日期： | 2012-01-01 |
| 出版日期： | |
| 页数： | 32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： 工程建设 给水 排水工程 室外给水 排水工程
【英文标准名称】:StandardPracticeforUseoftheUltrasonicTimeofFlightDiffraction(TOFD)Technique
【原文标准名称】:飞行衍射时间(TOFD)超声技术使用的标准实施规程
【标准号】:ASTME2373-2004
【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】:
【英文主题词】:flaw-heightsizing;flawsizing;nondestructivetesting;time-of-flight-diffraction;TOFD;ultrasonic
【摘要】:ThispracticeprovidesgeneralprinciplesfortheapplicationoftheTime-of-FlightDiffractionTechniqueasatoolfordetectionandsizingofdiscontinuities.TOFDisanondestructiveultrasonicexaminationtechniquethatisnotbasedonamplituderesponse.However,sufficientsensitivityisrequiredtoidentifyindicationsforevaluation.Techniquesusedaretypicallyappliedtoweldedjointsincarbonsteelbuttheprinciplesmaybeapplicabletootherapplicationsincludingothermaterialswithsuitablevalidationproceduresagreeabletothecontractingparties.Inadditiontoastand-aloneultrasonicdetectiontechniqueTOFDmaybeusedinconjunctionwithweldexaminationssuchasthosedescribedinPracticesE164andE1961whereitmaybeusedtoimprovesizingestimatesofflawsdetectedbythemanualormechanizedpulse-echotechniquesandhelpdiscriminatebetweenflawsandgeometricreflectors.Thetechniquehasproveneffectiveonthicknessesfrom9to300mm[0.375to12in.].TOFDhasbeenusedonthicknessesoutsideofthisrangebutspecialconsiderationsarenecessary.Techniquesdevelopedoutsideofthisrangeofthicknessshallbedemonstratedascapableofmeetingtherequireddetectionandsizingrequirementsofthespecificationused.1.1ThispracticeestablishestherequirementsfordevelopingultrasonicexaminationproceduresusingtheultrasonictechniqueknownasTime-of-FlightDiffraction(TOFD).1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Inch-poundunitsareprovidedforinformation.1.3ConsistentwithASTMPolicy,TOFDmayberegardedasanultrasonictestmethodwherebythequalitiesandcharacteristicsoftheitemtestedareevaluated,measuredandinsomecasesidentified.Measurementsmaybesubjecttoprecisionandbiasthatmaybedeterminedstatisticallyorasafunctionofsomeparameter(s)suchaswavelength.Thispracticemaybeusedforapplicationsthatwouldbequalitativeandproperlyaddressedasexaminationsaswellasquantitativeandmoreproperlyaddressedastests.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V04
【国际标准分类号】:71_040_99
【页数】:12P.;A4
【正文语种】:
【英文标准名称】:Opticalfibres—Part2-60:Productspecifications—SectionalspecificationforcategoryCsingle-modeintraconnectionfibres
【原文标准名称】:光纤.产品规范.C型单模内连接光纤用分规范
【标准号】:BSEN60793-2-60-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2009-02-28
【实施或试行日期】:2009-02-28
【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】:连接工艺;连接件;尺寸;电气工程;环境条件;光纤;信息传递;文电处理;单模纤维;光波导;光电子学;产品规范;分规范;规范;通信;传输特性
【英文主题词】:Connectiontechnology;Connections;Dimensions;Electricalengineering;Environmentalconditions;Fibreoptics;Informationtransfer;Messagehandling;Monomodefibres;Opticalwaveguides;Optoelectronics;Productspecifications;Sectionalspecification;Specification;Telecommunication;Transmissioncharacteristics
【摘要】:ThispartofIEC60793isapplicabletoopticalfibretypesC1,C2,C3,C4,asdescribedinTable1.Thesefibresareusedfortheintraconnectionswithinorbetweencomponentsorphotonicsystemsorsubsystems.Whilethefibresaresoldinlengthsonthescaleofkilometres,theyarenormallycutintoshortlengthsforuseintheseintraconnections.Whilethefibrescouldbeovercoatedorbufferedforthepurposeofmakingprotectedpigtails,theymaybeusedwithoutovercoating.Theymay,however,becolour-coded.
【中国标准分类号】:M33
【国际标准分类号】:33_180_10
【页数】:30P.;A4
【正文语种】:英语
