ASTM E1222-1990(2009) 管子护套装置介入损耗的实验室测量的标准试验方法

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【英文标准名称】:StandardTestMethodforLaboratoryMeasurementoftheInsertionLossofPipeLaggingSystems
【原文标准名称】:管子护套装置介入损耗的实验室测量的标准试验方法
【标准号】:ASTME1222-1990(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1990
【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】:E33.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:insertionloss;pipelaggingsystems;Negativeinsertionloss;Pipelaggingsystems;Reverberationroommethod;Soundtransmission--buildingmaterials/applications;Steelpipe;Acousticaltests;Insertionloss;Laboratorysoundtransmissiontesting;Lagg
【摘要】:Theinsertionlossofapipelaggingsystemdependsuponthelaggingsystemmaterials,themethodusedtoapplythematerials,thepipewallthickness,thesizeandshapeofthebareandlaggedpipe,andthemechanismscausingnoiseradiationfromthepipe.Insertionlossesmeasuredusingthistestmethodshouldbeusedwithsomecaution.Inthelaboratory,measurementsmustbemadeunderreproducibleconditions,butinpracticalusageinthefield,theconditionsthatdeterminetheeffectiveinsertionlossaredifficulttopredictandtheymayleadtoslightlydifferentresults.Insertionlossesmeasuredwiththistestmethodcanbeusedsuccessfullyforacousticaldesignpurposes.Insertionlossesmeasuredwiththistestmethodaremostusefulforpipesandlaggingsystemswhicharesimilartothoseusedinthelaboratoryconfiguration.Thistestmethodmaybeusedtorank-orderpipelaggingsystemsaccordingtoinsertionlossortoestimatethefieldinsertionlossofpipelaggingsystemsinstalledinthefield.Thistestmethodassumesthatpipewallstressesresultingfromdifferentmethodsofsupportingthetestpipeinthelaboratorydonothaveasignificanteffectuponthemeasuredinsertionloss.Pipelaggingsystemstypicallyhavesmallinsertionloss,andsometimesnegativeinsertionloss,atfrequenciesbelow500Hz.Theresultsobtainedatfrequenciesbelow500Hzmaybesomewhaterratic.Soundsourcesusedwiththistestmethodnormallyhavealowfrequencylimitintherangefrom300to500Hz.Forthesereasons,thelowestbandoffrequenciesforwhichresultsarerequirediscenteredat500Hz.1.1Thistestmethodcoversthemeasurementoftheinsertionlossofpipelaggingsystemsunderlaboratoryconditions.1.2AprocedureforaccreditingalaboratoryforpurposesofthistestmethodisgiveninAnnexA1.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P31
【国际标准分类号】:17_140_20
【页数】:5P.;A4
【正文语种】:英语