DB36/T 540-2008 汽车快修业开业条件
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来源:标准资料网
基本信息
| 标准名称： | 汽车快修业开业条件 |
| 发布部门： | 江西省质量技术监督局 |
| 发布日期： | 2008-10-23 |
| 实施日期： | 2008-12-01 |
| 首发日期： | |
| 作废日期： | |
| 主管部门： | 江西省质量技术监督局 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2008-12-01 |
适用范围
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前言
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目录
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引用标准
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所属分类： 食品 食品加工与制品 禽 蛋加工与制品 食品技术 肉 肉制品和其他动物类食品 家禽和蛋
【英文标准名称】:
【原文标准名称】:航空航天系列.直径为系列8和系列9、耐腐蚀钢制、飞机机体用刚性单列滚珠轴承.尺寸和负载.修改件1
【标准号】:NFL31-206/A1-1994
【标准状态】:现行
【国别】:法国
【发布日期】:1994-10-01
【实施或试行日期】:1994-10-05
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:V22
【国际标准分类号】:21_100_20;49_035
【页数】:3P.;A4
【正文语种】:其他
【英文标准名称】:StandardPracticeforExaminationofGas-FilledFilament-WoundCompositePressureVesselsUsingAcousticEmission
【原文标准名称】:声发射法检验充气长纤维缠绕复合材料压力容器的标准实施规程
【标准号】:ASTME2191/E2191M-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:acousticemission;compositegascylinders;compositepressurevessel;flaws;gaspressurevessels;NGVtanks;Acousticemission(AE)testing--metals/metallicmaterials;Compositepressurevessels;Filament-woundpressurevessels;Gascylinders;Gas
【摘要】:Duetosafetyconsiderations,theCompressedGasAssociation(CGA)andothershaveproducedguidelineswhichaddressin-serviceinspectionofNGVfuelcontainers(see2.2-2.4).AEexaminationislistedasanalternativetotheminimumthree-yearvisualexaminationwhichgenerallyrequiresthatthecontainerberemovedfromthevehicletoexposetheentirecontainersurface.TheAEmethodallowsx201C;in-situx201D;examinationofthecontainer.Slow-fillpressurizationmustproceedatflowratesthatdonotproducebackgroundnoisefromflowofthepressurizingmedium.Acousticemissiondataarerecordedthroughoutapressurizationrange(thatis,50%to100%ofAEexaminationpressure).Fast-fillpressurizationcanbeusedifholdperiodsareprovided.Acousticemissiondataarerecordedonlyduringtheholdperiods.Note18212;Fast-fillpressurizationislessappropriateforcarbon(orgraphite)compositesduetothelowersensitivityofcarbonfiberstostressrupturecomparedtootherfibers.BackgroundnoiseabovethethresholdwillcontaminatetheAEdataandrenderthemuseless.Usersmustbeawareofthefollowingcommoncausesofbackgroundnoise:highfillrate(measurableflownoise);mechanicalcontactwiththevesselbyobjects;electromagneticinterference(EMI)andradiofrequencyinterference(RFI)fromnearbybroadcastingfacilitiesandfromothersources;leaksatpipeorhoseconnectionsandairborneparticles,insects,rainandsnow.Thispracticeshouldnotbeusedifbackgroundnoisecannotbeeliminatedorcontrolled.5.2Sensitivityisinfluencedbyfactorsthataffectelasticwavepropagation,sensorcouplingandsignalprocessorsettings.5.3ItispossibletomeasureAEfromAEsourcesthatcannotbeverifiedbyotherNDEmethods.1.1Thispracticeprovidesguidelinesforacousticemission(AE)examinationoffilament-woundcompositepressurevessels,forexample,thetypeusedforfueltanksinvehicleswhichusenaturalgasfuel.1.2Thispracticerequirespressurizationtoalevelequaltoorgreaterthanwhatisencounteredinnormaluse.Thetanks''pressurizationhistorymustbeknowninordertousethispractice.Pressurizationmediummaybegasorliquid.1.3Thispracticeislimitedtovesselsdesignedforlessthan690bar[10,000psi]maximumallowableworkingpressureandwatervolumelessthan1m3or1000L[35.4ft3].1.4AEmeasurementsareusedtodetectemissionsources.Othernondestructiveexamination(NDE)methodsmaybeusedtogainadditionalinsightintotheemissionsource.ProceduresforotherNDEmethodsarebeyondthescopeofthispractice.1.5Thispracticeappliestoexaminationofnewandin-servicefilament-woundcompositepressurevessels.1.6Thispracticeappliestoexaminationsconductedatambienttemperaturesabove20x00B0;C[70x00B0;F].Thispracticemaybeusedatambienttemperaturesbelow20x00B0;C[70x00B0;F]ifprovisionhasbeenmadetofilltothetank''sratedpressureat20x00B0;C[70x00B0;F].1.7Units8212;ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.8
