ASTM D3796-1990(2004) S型皮托管(空速管)校正的标准实施规程

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【英文标准名称】:StandardPracticeforCalibrationofTypeSPitotTubes
【原文标准名称】:S型皮托管(空速管)校正的标准实施规程
【标准号】:ASTMD3796-1990(2004)
【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】:D22.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:工艺;校正;保健;分析;空气;皮托管;试验设备;职业安全
【英文主题词】:calibration;pitottube;TypeSpitottube
【摘要】:TheTypeSpitottube(Fig.1)isoftenusedtomeasurethevelocityofflowinggasstreamsinindustrialsmokestacksandducts.BeforeaTypeSpitottubeisusedforthispurpose,itscoefficientsmustbedeterminedbycalibrationagainstastandardpitottube(2).1.1ThispracticecoversthedeterminationofTypeSpitottubecoefficientsinthegasvelocityrangefrom305to1524m/minor5.08to25.4m/s[1000to5000ft/min].ThemethodappliesbothtothecalibrationofisolatedTypeSpitottubes(see),andpitobeassemblies.1.2ThispracticeoutlinesproceduresforobtainingTypeSpitottubecoefficientsbycalibrationatasingle-velocitysettingnearthemidpointofthenormalworkingrange.TypeSpitotcoefficientsobtainedbythismethodwillgenerallybevalidtowithin3%overthenormalworkingrange.IfamoreprecisecorrelationbetweenTypeSpitottubecoefficientandvelocityisdesired,multivelocitycalibrationtechnique()shouldbeused.1.3Thispracticemaybeusedforthecalibrationofthermalanemometersforgasvelocitiesinexcessof3m/s[10ft/s].Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N04
【国际标准分类号】:17_020
【页数】:13P.;A4
【正文语种】: