JJG 294-1982 半自动周节检查仪检定规程
作者:标准资料网 时间:2024-05-29 17:48:59 浏览:9400
来源:标准资料网
基本信息
| 标准名称： | 半自动周节检查仪检定规程 |
| 英文名称： | Verification Regulation of Semiautomatic Circular -Pitch Tester |
| 中标分类： |
综合 >>
计量 >>
长度计量 |
| 替代情况： | 被代替JJF 1209-2008代替 |
| 发布日期： | |
| 实施日期： | 2003-10-01 |
| 首发日期： | |
| 作废日期： | 2008-11-23 |
| 出版社： | 中国计量出版社 |
| 出版日期： | |
| 页数： | 7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： 综合 计量 长度计量
【英文标准名称】:Self-AdheringPolymerModifiedBituminousSheetMaterialsUsedasSteepRoofingUnderlaymentforIceDamProtection
【原文标准名称】:冰坝防护用作为陡斜屋面衬底的自粘聚合物改良型沥青板材料
【标准号】:ASTMD1970-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【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】:高聚物;自粘的;覆盖物;沥青屋顶板;陡斜沥青屋面
【英文主题词】:polymers;steep-pitchedroofs;bitumenroofsheetings;self-adhesive;coverings
【摘要】:
【中国标准分类号】:Q17
【国际标准分类号】:91_100_60
【页数】:
【正文语种】:英语
【英文标准名称】:StandardPracticeforAcousticEmissionMonitoringDuringContinuousWelding
【原文标准名称】:连续焊接时声排放监控的标准实施规程
【标准号】:ASTME749-2007
【标准状态】:现行
【国别】:
【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(US-ASTM)
【起草单位】:E07.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:声学;排放;金属;监控;噪声辐射;无损试验;声音传输;试验;焊接
【英文主题词】:continuouswelding;fusionsolidification;heat-affectedzone;high-temperaturesensors;in-processdefectlocation;thermalstress;waveguides
【摘要】:DetectionandlocationofAEsourcesinweldmentsduringfabricationmayprovideinformationrelatedtotheintegrityoftheweld.Suchinformationmaybeusedtodirectrepairproceduresontheweldorasaguideforapplicationofothernondestructiveevaluation(NDE)methods.AmajorattributeofapplyingAEforin-processmonitoringofweldsistheabilityofthemethodtoprovideimmediatereal-timeinformationonweldintegrity.Thisfeaturemakesthemethodusefultolowerweldcostsbyrepairingdefectsatthemostconvenientpointintheproductionprocess.TheAEactivityfromdiscontinuitiesintheweldmentisstimulatedbythethermalstressesfromtheweldingprocess.TheAEactivityresultingfromthisstimulationisdetectedbyAEsensorsinthevicinityoftheweldment,whichconverttheacousticwavesintoelectronicsignals.TheAEinstrumentationprocessessignalsandprovidesmeansforimmediatedisplayorindicationofAEactivityandforpermanentrecordingsofthedata.Itemstobeconsideredinpreparationandplanningformonitoringshouldincludebutnotbelimitedtothefollowing:4.2.1Descriptionofthesystemorobjecttobemonitoredorexamined,4.2.2Extentofmonitoring,thatis,entireweld,coverpassesonly,andsoforth,4.2.3Limitationsorrestrictionsonthesensormountingprocedures,ifapplicable,4.2.4PerformanceparameterstobeestablishedandmaintainedduringtheAEsystemverificationprocedure(sensitivity,locationaccuracy,andsoforth),4.2.5MaximumtimeintervalbetweenAEsystemverificationchecks,4.2.6Performancecriteriaforpurchasedequipment,4.2.7RequirementsforpermanentrecordsoftheAEresponse,ifapplicable,4.2.8Contentandformatoftestreport,ifrequired,and4.2.9Operatorqualificationandcertification,ifrequired.1.1Thispracticeprovidesrecommendedguidelinesforacousticemission(AE)monitoringofweldmentsduringandimmediatelyfollowingtheirfabricationbycontinuousweldingprocesses.1.2TheproceduredescribedinthispracticeisapplicabletothedetectionandlocationofAEsourcesinweldmentsandintheirheat-affectedzoneduringfabrication,particularlyinthosecaseswherethetimedurationofweldingissuchthatfusionandsolidificationtakeplacewhileweldingisstillinprogress.1.3Theeffectivenessofacousticemissiontodetectdiscontinuitiesintheweldmentandtheheat-affectedzoneisdependentonthedesignoftheAEsystem,theAEsystemverificationprocedure,theweldprocess,andthematerialtype.Materialsthathavebeenmonitoredincludelow-carbonsteels,low-alloysteels,stainlesssteels,andsomealuminumalloys.Thesystemperformancemustbeverifiedforeachapplicationbydemonstratingthatthedefectsofconcerncanbedetectedwiththedesiredreliability.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J33;Z67
【国际标准分类号】:17_140_20;25_160_10;25_160_01
【页数】:5P.;A4
【正文语种】:
