SAE AMS7211 Cotter Pins, Steel 18cr 10.5ni 0.40ti, Corrosion and Heat Resistant Steel (Cancelled Oct 1993)
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来源:标准资料网
Product Code:SAE AMS7211
Title:Cotter Pins, Steel 18cr 10.5ni 0.40ti, Corrosion and Heat Resistant Steel (Cancelled Oct 1993)
Issuing Committee:
Scope:
基本信息
| 标准名称： | 煤矿用液压凿岩机通用技术条件 |
| 中标分类： |
矿业 >>
矿山机械设备 >>
煤矿专用设备器材 |
| 替代情况： | MT 198-89 |
| 发布部门： | 中华人民共和国煤炭工业部 |
| 发布日期： | 1996-04-18 |
| 实施日期： | 1996-10-01 |
| 首发日期： | |
| 作废日期： | |
| 提出单位： | 煤炭工业部煤矿专用设备标准化技术委员会 |
| 归口单位： | 煤炭工业部煤矿设备标准化技术委员会井巷设备分会 |
| 起草单位： | 煤炭科学研究总院北京建井研究所 |
| 起草人： | 郭孝先、王维华、李耀武、黄园月、狄志勇 |
| 出版社： | 中国煤炭工业出版社 |
| 出版日期： | 1996-10-01 |
| 页数： | 11页 |
适用范围
本标准规定了煤矿用液压凿岩机(以下统一简称“凿岩机”)的技术要求、试验方法、检验规则、标志、包装、运输和贮存。
本标准适用于导轨式与支腿式液压凿岩机，也适用于煤矿用钻炮孔和锚杆孔用的液压回转钻机(以下简称“回转钻”)、破碎岩石用的液压破碎冲击器(以下简称“冲击器，)。
前言
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目录
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引用标准
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所属分类： 矿业 矿山机械设备 煤矿专用设备器材
【英文标准名称】:StandardPracticeforExaminationofSeamless,Gas-Filled,PressureVesselsUsingAcousticEmission
【原文标准名称】:用声音排放法检验无缝、充气的压力容器的标准试验方法
【标准号】:ASTME1419-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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;flawsinsteelvessels;gaspressurevessels;seamlessgascylinders;seamlesssteelcylinders;seamlessvessels;Acousticemission(AE)testing--metals/metallicmaterials;Flawdetection;Gascylinders;Gaspressuresystems/applicat
【摘要】:Becauseofsafetyconsiderations,regulatoryagencies(forexample,U.S.DepartmentofTransportation)requireperiodicexaminationsofvesselsusedintransportationofindustrialgases(seeSection49,CodeofFederalRegulations).TheAEexaminationhasbecomeacceptedasanalternativetothecommonhydrostaticprooftest.Inthecommonhydrostatictest,volumetricexpansionofvesselsismeasured.AnAEexaminationshouldnotbeusedforaperiodofoneyearafteracommonhydrostatictest.SeeNote2.Note28212;TheKaisereffectrelatestodecreasedemissionthatisexpectedduringasecondpressurization.Commonhydrostatictestsusearelativelyhighpressure(167%ofnormalservicepressure).(SeeSection49,CodeofFederalRegulations.)IfanAEexaminationisperformedtoosoonaftersuchapressurization,theAEresultswillbeinsensitivetoalowerexaminationpressure(thatis,thelowerpressurethatisassociatedwithanAEexamination).Pressurization:Generalpracticeinthegasindustryistouselowpressurizationrates.Thispracticepromotessafetyandreducesequipmentinvestment.TheAEexaminationsshouldbeperformedwithpressurizationratesthatallowvesseldeformationtobeinequilibriumwiththeappliedload.Typicalcurrentpracticeistouseratesthatapproximate500psi/h(3.45MPa/h).Gascompressorsheatthepressurizingmedium.Afterpressurization,vesselpressuremaydecayasgastemperatureequilibrateswithambientconditions.Emissionfromflawsiscausedbyflawgrowthandsecondarysources(forexample,cracksurfacecontactandcontainedmillscale).Secondarysourcescanproduceemissionthroughoutvesselpressurization.Whenpressurewithinavesselislow,andgasisthepressurizingmedium,flowvelocitiesarerelativelyhigh.Flowinggas(turbulence)andimpactbyentrainedparticlescanproducemeasurableemission.Consideringthis,acquisitionofAEdatamaycommenceatsomepressuregreaterthanstartingpressure(forexample,1/3ofmaximumexaminationpressure).MaximumTestPressure8212;Seriousflawsusuallyproducemoreacousticemission(thatis,moreevents,eventswithhigherpeakamplitude)fromsecondarysourcesthanfromflawgrowth.Whenvesselsarepressurized,flawsproduceemissionatpressureslessthannormalfillpressure.Amaximumexaminationpressurethatis10%greaterthannormalfillpressureallowsmeasurementofemissionfromsecondarysourcesinflawsandfromflawgrowth.PressurizationSchedule8212;Pressurizationshouldproceedatratesthatdonotproducenoisefromthepressurizingmediumandthatallowvesseldeformationtobeinequilibriumwithappliedload.Pressureholdsarenotnecessary;however,theymaybeusefulforreasonsotherthanmeasurementofAE.ExcessbackgroundnoisemaydistortAEdataorrenderthemuseless.Usersmustbeawareofthefollowingcommonsourcesofbackgroundnoise:highgas-fillrate(measurableflownoise);mechanicalcontactwiththevesselbyobjects;electromagneticinterference(EMI)andradiofrequencyinterference(RFI)fromnearbybroadcastingfacilitiesandfromothersources;leaksatpipeorhoseconnections;andairbornesandparticles,insects,orraindrops.Thispracticeshouldnotbeusedifbackgroundnoisecannotbeeliminatedorcontrolled.1.1Thispracticeprovidesguidelinesforacousticemission(AE)examinationsofseamlesspressurevessels(tubes)ofthetypeusedfordistributionorstorageofindustrialgases.1.2Thispracticerequirespressurizationtoalevelgreaterthanno......
【中国标准分类号】:A82
【国际标准分类号】:23_020_30
【页数】:7P.;A4
【正文语种】:英语
