IEC 61189-3 Edition 1.1-2006 电气材料、互连结构和组装件的试验方法.第3部分:互连结构的试验方法(印制电路板)

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【英文标准名称】:StandardPracticeforUltrasonicExaminationoftheWeldZoneofWeldedPipeandTubing
【原文标准名称】:焊接管道焊接区域的超声波检验标准实施规程
【标准号】:ASTME273-2001(2005)
【标准状态】:现行
【国别】:
【发布日期】:2001
【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】:管;无损检验;超声波学
【英文主题词】:anglebeam;longitudinalweldedpipe;longitudinalweldedtubing;nondestructiveexamination;ultrasonicexamination
【摘要】:1.1Thispracticedescribesgeneralultrasonicexaminationproceduresforthedetectionofdiscontinuitiesintheweldandadjacentheataffectedzonesofweldedpipeandtubingbyscanningwithrelativemotionbetweenthesearchunitandpipeortube.Whencontactorunfocusedimmersionsearchunitsareemployed,thispracticeisintendedfortubularproductshavingspecifiedoutsidediameters2in.(50mm)andspecifiedwallthicknessesof1/8to11/16in.(3to27mm).Whenproperlyfocusedimmersionsearchunitsareemployed,thispracticemayalsobeappliedtomaterialofsmallerdiameterandthinnerwall.Note18212;Whencontactorunfocusedimmersionsearchunitsareused,precautionsshouldbeexercisedwhenexaminingpipesortubesnearthelowerspecifiedlimits.Certaincombinationsofsearchunitsize,frequency,thin-wallthicknesses,andsmalldiameterscouldcausegenerationofunwantedsoundwavesthatmayproduceerroneousexaminationresults.1.2Allsurfacesofmaterialtobeexaminedinaccordancewiththispracticeshallbecleanfromscale,dirt,burrs,slag,spatterorotherconditionsthatwouldinterferewiththeexaminationresults.Theconfigurationoftheweldmustbesuchthatinterferingsignalsarenotgeneratedbyreflectionsfromit.Treatmentoftheinnersurfaceandoutersurfaceweldbeadssuchastrimming("scarfing")orrollingisoftenrequiredtoremoveprotuberancesthatcouldresultinspuriousreflections.1.3Thispracticedoesnotestablishacceptancecriteria,theymustbespecifiedbytheusingparties.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIequivalentsareinparenthesesandmaybeapproximate.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:23_040_01
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Part6-4:Applicationlayerprotocolspecification-Type4elements
【原文标准名称】:工业通讯网络.现场总线规范.第6-4部分:应用层协议规范.4型元件
【标准号】:IEC61158-6-4-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-12
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC65C
【标准类型】:()
【标准水平】:()
【中文主题词】:应用层;应用;总线系统;总线;电路网络;通信;计算机应用;计算机控制;控制;控制设备;控制系统;控制工艺学;数据总线;数据通信;数据交换;数据传输线;数据连接系统;数据网络;数据处理;数据服务;数据传送;数据传输控制规程;定义;数字的;数字数据;数字工程;电子数据处理;电气工程;电子仪器;电子系统;现场总线;制导系统;工业的;工业设施;信息交换;信息处理;信息技术;接口(数据处理);开放系统互连;操作技术;OSI;过程控制工程;协议规范;协议;服务设施;规范;规范(验收);传输媒质;传输协议
【英文主题词】:Applicationlayer;Applications;Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Computerapplications;Computerizedcontrol;Control;Controlequipment;Controlsystems;Controltechnology;Databus;Datacommunication;Dataexchange;Dataline;Datalinksystem;Datanetwork;Dataprocessing;Dataservices;Datatransfer;Datatransmissioncontrolprocedures;Definitions;Digital;Digitaldata;Digitalengineering;EDP;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces(dataprocessing);Opensystemsinterconnection;Operationaltechniques;OSI;Processcontrolengineering;Protocolspecification;Protocols;Services;Specification;Specification(approval);Transmissionmedia;Transmissionprotocol
【摘要】:1.1GeneralThefieldbusapplicationlayer(FAL)providesuserprogramswithameanstoaccessthefieldbuscommunicationenvironment.Inthisrespect,theFALcanbeviewedasa“windowbetweencorrespondingapplicationprograms.”Thisstandardprovidescommonelementsforbasictime-criticalandnon-time-criticalmessagingcommunicationsbetweenapplicationprogramsinanautomationenvironmentandmaterialspecifictoType4fieldbus.Theterm“time-critical”isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.1.2SpecificationsTheprincipalobjectiveofthisstandardistospecifythesyntaxandbehavioroftheapplicationlayerprotocolthatconveystheapplicationlayerservicesdefinedinIEC61158-5-4.Asecondaryobjectiveistoprovidemigrationpathsfrompreviously-existingindustrialcommunicationsprotocols.ItisthislatterobjectivewhichgivesrisetothediversityofprotocolsstandardizedinIEC61158-6.1.3ConformanceThisstandarddonotspecifyindividualimplementationsorproducts,nordotheyconstraintheimplementationsofapplicationlayerentitieswithinindustrialautomationsystems.Conformanceisachievedthroughimplementationofthisapplicationlayerprotocolspecification.
【中国标准分类号】:N18;P76
【国际标准分类号】:25_040_40;35_100_70;35_160
【页数】:40P;A4
【正文语种】:英语