【英文标准名称】:StandardTestMethodforLaboratoryMeasurementoftheInsertionLossofPipeLaggingSystems
【原文标准名称】:管子护套装置安放损耗的实验室测量用试验方法
【标准号】:ASTME1222-1990(2002)
【标准状态】:现行
【国别】:
【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】:管道;声学;建筑声学;热绝缘;安放损耗;建筑;试验;管
【英文主题词】:insertionloss;pipelaggingsystems
【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】:


【英文标准名称】:Adjustableadaptorsfortoolswithmorsetapershanks,shorttypes
【原文标准名称】:带莫氏锥柄刀具的可调整转接器.短型
【标准号】:DIN6327-1-1985
【标准状态】:现行
【国别】:德国
【发布日期】:1985-06
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:刀具夹持装置;手柄(工具);可调适配器;套筒;机床部件;机用锥销;夹具;梯形螺纹;刀具夹具;材料;设计;作标记;公差;尺寸
【英文主题词】:Adjustableadaptors;Design;Dimensions;Fixtures;Handles(tools);Machinetapers;Machinetoolcomponents;Marking;Materials;Sleeves(mechanicalcomponents);Tolerances(measurement);Toolholdingfixtures;T
【摘要】:
【中国标准分类号】:J52
【国际标准分类号】:25_060_20
【页数】:4P;A4
【正文语种】:德语