Product Code:SAE AMS4362
Title:Forgings, Magnesium Alloy 5.5zn 0.45zr Precipitation Heat Treated
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification covers a magnesium alloy in the form of die forgings, hand forgings, and forging stock. These forgings have been used typically for parts requiring high strength-to-weight ratio for service up to 300 degrees F (149 degrees C), but usage is not limited to such applications.【英文标准名称】:StandardTestMethodforEvaluatingtheIgnitionSensitivityandFaultToleranceofOxygenRegulatorsUsedforMedicalandEmergencyApplications
【原文标准名称】:医疗和应急设备用氧气调节器的引燃敏感性和耐故障性评价的标准试验方法
【标准号】:ASTMG175-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:G04.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:faulttolerance;forcedignition;ignition;ignitionsensitivity;impacttest;medicaloxygenregulator;oxygenpressureshocktest;oxygenregulator;promotedignition
【摘要】:Thistestmethodcomprisestwophasesandisusedtoevaluatetheignitionsensitivityandfaulttoleranceofoxygenregulatorsusedformedicalandemergencyapplications.Phase1:OxygenPressureShockTest8212;Theobjectiveofthistestphaseistodeterminewhethertheheatfromoxygenpressureshockswillresultinburnoutorvisibleheatdamagetotheinternalpartsoftheregulator.Phase1isperformedaccordingtoISO10524,Section11.8.1.4.2.1ThecriteriaforanacceptabletestarespecifiedinISO10524,Section11.8.1.4.2.2Thepass/failcriteriaforaregulatorarespecifiedinISO10524,Section11.8.1.Phase2:RegulatorInletPromotedIgnitionTest8212;Theobjectiveofthistestphaseistodetermineifanignitioneventupstreamoftheregulatorinletfilterwillresultinsustainedcombustionandburnoutoftheregulator.4.3.1Thecriterionforanacceptabletestiseither,(1)failureoftheregulator,whichisdefinedasthebreachofthepressurizedregulatorcomponent(burnout)andejectionofmoltenorburningmetaloranyinternalpartsfromtheregulator,or(2)iftheregulatordoesnotfail,consumptionofatleast90%oftheignitionpillasdeterminedbyvisualinspectionormassdetermination.Failureoftheregulatoratthesealringdoesnotconstituteanacceptabletest.4.3.2Momentary(lessthan1s)ejectionofflamethroughnormalventpaths,withsparksthatlooksimilartothosefrommetalappliedtoagrindingwheel,isacceptable.1.1Thisstandarddescribesatestmethodforevaluatingtheignitionsensitivityandfaulttoleranceofoxygenregulatorsusedformedicalandemergencyapplications.1.2Forthepurposeofthisstandard,apressureregulatorisadevice,alsocalledapressure-reducingvalve,thatisintendedformedicaloremergencypurposesandthatisusedtoconvertamedicaloremergencygaspressurefromahigh,variablepressuretoalower,moreconstantworkingpressure[21CFR868.2700(a)].1.3ThisstandardappliesonlytooxygenregulatorsusedformedicalandemergencyapplicationsthataredesignedandfittedwithCGA540inletconnectionsorCGA870pin-indexadapters(CGAV-1).1.4Thisstandardprovidesanevaluationtoolfordeterminingthefaulttoleranceofoxygenregulatorsusedformedicalandemergencyapplications.Afaulttolerantregulatorisdefinedas(1)havingalowprobabilityofignitionasevaluatedbyrapidpressurizationtesting,and(2)havingalowconsequenceofignitionasevaluatedbyforcedignitiontesting.1.5Thisstandardisnotadesignstandard;however,itcanbeusedtoaiddesignersindesigningandevaluatingthesafeperformanceandfaulttolerancecapabilityofoxygenregulatorsusedformedicalandemergencyapplications(G128).Note18212;Itisessentialthatariskassessmentbecarriedoutonbreathinggassystems,especiallyconcerningoxygencompatibility(refertoASTMG63andG94)andtoxicproductformationduetoignitionordecompositionofnonmetallicmaterialsasweighedagainsttheriskofflammability(refertoISO15001.2).SeeAppendixX1andX2.1fordetails.1.6Thisstandardisalsousedtoaidthoseresponsibleforpurchasingorusingoxygenregulatorsusedformedicalandemergencyapplicationsinensuringthatselectedregulatorsaretolerantoftheignitionmechanismsthatarenormallyactiveinoxygensystems.1.7Thisstandarddoesnotpurporttoaddresstheignitionsensitivityandfaulttoleranceofanoxygenregulatorcausedbycontaminationduringfieldmaintenanceoruse.Regulatordesignersandmanufacturersshouldprovi......
【中国标准分类号】:C47
【国际标准分类号】:11_040_10
【页数】:14P.;A4
【正文语种】: