SAE AS35769 Gasket, Metallic, Encased, Annular, Copper
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Product Code:SAE AS35769
Title:Gasket, Metallic, Encased, Annular, Copper
Issuing Committee:A-6c2 Seals Committee
Scope:No Scope available.
Title:Gasket, Metallic, Encased, Annular, Copper
Issuing Committee:A-6c2 Seals Committee
Scope:No Scope available.
下载地址: 点击此处下载
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【英文标准名称】:StandardGuideforComputedTomography(CT)SystemSelection
【原文标准名称】:计算机计算X线断层摄影术(CT)系统选择的标准指南
【标准号】:ASTME1672-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:E07.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:计算机断层摄影;导向装置;信息处理;语言的用法;医疗技术学;规范(验收);生产量
【英文主题词】:artifacts;computedtomography(CT);contrastdiscrimination;detectability;dynamicrangeimaging;non-destructiveevaluation;spatialresolution;scanservices;throughput
【摘要】:ThisguidewillaidthepurchaseringeneratingaCTsystemspecification.Thisguidecoverstheconversionofpurchaserrsquo;requirementstosystemcomponentsthatmustoccurforausefulCTsystemspecificationtobeprepared.Additionalinformationcanbegainedindiscussionswithpotentialsuppliersorwithindependentconsultants.Thisguideisapplicabletopurchasersseekingscanservices.ThisguideisapplicabletopurchasersneedingtoprocureaCTsystemforaspecificexaminationapplication.1.1Thisguidecoversguidelinesfortranslatingapplicationrequirementsintocomputedtomography(CT)systemrequirements/specificationsandestablishesacommonterminologytoguidebothpurchaserandsupplierintheCTsystemselectionprocess.ThisguideisapplicabletothepurchaserofbothCTsystemsandscanservices.Computedtomographysystemsarecomplexinstruments,consistingofmanycomponentsthatmustcorrectlyinteractinordertoyieldimagesthatrepeatedlyreproducesatisfactoryexaminationresults.Computedtomographysystempurchasersaregenerallyconcernedwithapplicationrequirements.Computedtomographysystemsuppliersaregenerallyconcernedwiththesystemcomponentselectiontomeetthepurchaser''sperformancerequirements.Thisguideisnotintendedtobelimitingorrestrictive,butrathertoaddresstherelationshipsbetweenapplicationrequirementsandperformancespecificationsthatmustbeunderstoodandconsideredforproperCTsystemselection.1.2Computedtomography(CT)maybeusedfornewapplicationsorinplaceoffilmradiography,providedthatthecapabilitytodisclosephysicalfeaturesorindicationsthatformtheacceptance/rejectioncriteriaisfullydocumentedandavailableforreview.1.3Computedtomography(CT)systemsuseasetoftransmissionmeasurementsmadealongasetofpathsprojectedthroughtheobjectfrommanydifferentdirections.Eachofthetransmissionmeasurementswithintheseviewsisdigitizedandstoredinacomputer,wheretheyaresubsequentlyconditioned(forexample,normalizedandcorrected)andreconstructedbyoneofavarietyoftechniques.Anin-depthtreatmentofCTprinciplesisgiveninGuideE1441.1.4Computedtomography(CT),aswithconventionalradiographyandradioscopicexaminations,isbroadlyapplicabletoanymaterialorobjectthroughwhichabeamofpenetratingradiationmaybepassedanddetected,includingmetals,plastics,ceramics,metallic/nonmetalliccompositematerialandassemblies.TheprincipaladvantageofCTisthatitprovidesdensitometric(thatis,radiologicaldensityandgeometry)imagesofthincrosssectionsthroughanobject.Becauseoftheabsenceofstructuralsuperposition,imagesaremucheasiertointerpretthanconventionalradiologicalimages.ThenewpurchasercanquicklylearntoreadCTdatabecauseimagescorrespondmorecloselytothewaythehumanmindvisualizes3-Dstructuresthanconventionalprojectionradiology.Further,becauseCTimagesaredigital,theimagesmaybeenhanced,analyzed,compressed,archived,inputasdataintoperformancecalculations,comparedwithdigitaldatafromothernondestructiveevaluationmodalities,ortransmittedtootherlocationsforremoteviewing.Whilemanyofthedetailsaregenericinnature,thisguideimplicitlyassumestheuseofpenetratingradiation,specificallyXraysandgammarays.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A15
【国际标准分类号】:35_240_80
【页数】:11P.;A4
【正文语种】:
Product Code:SAE J342
Title:Spark Arrester Test Procedure for Large Size Engines
Issuing Committee:Spark Arrester Standards Committee
Scope: This SAE Recommended Practice establishes equipment and procedures for the evaluation of the effectiveness and other performance characteristics of spark arresters or turbochargers used on the exhaust system of large engines normally used in a railroad locomotive, stationary power plant, and other similar applications. This document does not cover applications requiring flame arresting, exhaust gas cooling, or isolation from explosive gases. Two test methods are presented; a laboratory test using ambient air (cold test) and an engine test using exhaust gases (hot test). The hot test is preferred.
Rationale: This SAE Recommended Practice establishes equipment and procedures for the evaluation of the effectiveness and other performance characteristics of spark arresters or turbochargers used on the exhaust system of large engines normally used in a railroad locomotive, stationary power plant, and other similar applications. This document does not cover applications requiring flame arresting, exhaust gas cooling, or isolation from explosive gases. Two test methods are presented; a laboratory test using ambient air (cold test) and an engine test using exhaust gases (hot test). The hot test is preferred.
【原文标准名称】:计算机计算X线断层摄影术(CT)系统选择的标准指南
【标准号】:ASTME1672-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:E07.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:计算机断层摄影;导向装置;信息处理;语言的用法;医疗技术学;规范(验收);生产量
【英文主题词】:artifacts;computedtomography(CT);contrastdiscrimination;detectability;dynamicrangeimaging;non-destructiveevaluation;spatialresolution;scanservices;throughput
【摘要】:ThisguidewillaidthepurchaseringeneratingaCTsystemspecification.Thisguidecoverstheconversionofpurchaserrsquo;requirementstosystemcomponentsthatmustoccurforausefulCTsystemspecificationtobeprepared.Additionalinformationcanbegainedindiscussionswithpotentialsuppliersorwithindependentconsultants.Thisguideisapplicabletopurchasersseekingscanservices.ThisguideisapplicabletopurchasersneedingtoprocureaCTsystemforaspecificexaminationapplication.1.1Thisguidecoversguidelinesfortranslatingapplicationrequirementsintocomputedtomography(CT)systemrequirements/specificationsandestablishesacommonterminologytoguidebothpurchaserandsupplierintheCTsystemselectionprocess.ThisguideisapplicabletothepurchaserofbothCTsystemsandscanservices.Computedtomographysystemsarecomplexinstruments,consistingofmanycomponentsthatmustcorrectlyinteractinordertoyieldimagesthatrepeatedlyreproducesatisfactoryexaminationresults.Computedtomographysystempurchasersaregenerallyconcernedwithapplicationrequirements.Computedtomographysystemsuppliersaregenerallyconcernedwiththesystemcomponentselectiontomeetthepurchaser''sperformancerequirements.Thisguideisnotintendedtobelimitingorrestrictive,butrathertoaddresstherelationshipsbetweenapplicationrequirementsandperformancespecificationsthatmustbeunderstoodandconsideredforproperCTsystemselection.1.2Computedtomography(CT)maybeusedfornewapplicationsorinplaceoffilmradiography,providedthatthecapabilitytodisclosephysicalfeaturesorindicationsthatformtheacceptance/rejectioncriteriaisfullydocumentedandavailableforreview.1.3Computedtomography(CT)systemsuseasetoftransmissionmeasurementsmadealongasetofpathsprojectedthroughtheobjectfrommanydifferentdirections.Eachofthetransmissionmeasurementswithintheseviewsisdigitizedandstoredinacomputer,wheretheyaresubsequentlyconditioned(forexample,normalizedandcorrected)andreconstructedbyoneofavarietyoftechniques.Anin-depthtreatmentofCTprinciplesisgiveninGuideE1441.1.4Computedtomography(CT),aswithconventionalradiographyandradioscopicexaminations,isbroadlyapplicabletoanymaterialorobjectthroughwhichabeamofpenetratingradiationmaybepassedanddetected,includingmetals,plastics,ceramics,metallic/nonmetalliccompositematerialandassemblies.TheprincipaladvantageofCTisthatitprovidesdensitometric(thatis,radiologicaldensityandgeometry)imagesofthincrosssectionsthroughanobject.Becauseoftheabsenceofstructuralsuperposition,imagesaremucheasiertointerpretthanconventionalradiologicalimages.ThenewpurchasercanquicklylearntoreadCTdatabecauseimagescorrespondmorecloselytothewaythehumanmindvisualizes3-Dstructuresthanconventionalprojectionradiology.Further,becauseCTimagesaredigital,theimagesmaybeenhanced,analyzed,compressed,archived,inputasdataintoperformancecalculations,comparedwithdigitaldatafromothernondestructiveevaluationmodalities,ortransmittedtootherlocationsforremoteviewing.Whilemanyofthedetailsaregenericinnature,thisguideimplicitlyassumestheuseofpenetratingradiation,specificallyXraysandgammarays.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A15
【国际标准分类号】:35_240_80
【页数】:11P.;A4
【正文语种】:
Product Code:SAE J342
Title:Spark Arrester Test Procedure for Large Size Engines
Issuing Committee:Spark Arrester Standards Committee
Scope: This SAE Recommended Practice establishes equipment and procedures for the evaluation of the effectiveness and other performance characteristics of spark arresters or turbochargers used on the exhaust system of large engines normally used in a railroad locomotive, stationary power plant, and other similar applications. This document does not cover applications requiring flame arresting, exhaust gas cooling, or isolation from explosive gases. Two test methods are presented; a laboratory test using ambient air (cold test) and an engine test using exhaust gases (hot test). The hot test is preferred.
Rationale: This SAE Recommended Practice establishes equipment and procedures for the evaluation of the effectiveness and other performance characteristics of spark arresters or turbochargers used on the exhaust system of large engines normally used in a railroad locomotive, stationary power plant, and other similar applications. This document does not cover applications requiring flame arresting, exhaust gas cooling, or isolation from explosive gases. Two test methods are presented; a laboratory test using ambient air (cold test) and an engine test using exhaust gases (hot test). The hot test is preferred.
