【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】:ASTMD3796-2009
【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】:D22.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:calibration;pitottube;TypeSpitottube;Atmosphericanalysis--emissiontestingofstacksandflues;Calibration--air/atmosphericanalysisinstruments;Emissiontesting--stacksandflues;Gases(atmospheric);Gasstreams;Pitottubemethod;Stacks/f
【摘要】:TheTypeSpitottube(Fig.1)isoftenusedtomeasurethevelocityofflowinggasstreamsinindustrialsmokestacksandducts.BeforeaTypeSpitottubeisusedforthispurpose,itscoefficientsmustbedeterminedbycalibrationagainstastandardpitottube(2).1.1ThispracticecoversthedeterminationofTypeSpitottubecoefficientsinthegasvelocityrangefrom305to1524m/minor5.08to25.4m/s(1000to5000ft/min).ThemethodappliesbothtothecalibrationofisolatedTypeSpitottubes(see5.1),andpitobeassemblies.1.2ThispracticeoutlinesproceduresforobtainingTypeSpitottubecoefficientsbycalibrationatasingle-velocitysettingnearthemidpointofthenormalworkingrange.TypeSpitotcoefficientsobtainedbythismethodwillgenerallybevalidtowithinx00B1;3%overthenormalworkingrange.IfamoreprecisecorrelationbetweenTypeSpitottubecoefficientandvelocityisdesired,multivelocitycalibrationtechnique(AnnexA1)shouldbeused.ThecalibrationcoefficientsdeterminedfortheTypeSpitottubebythispracticedonotapplyinfieldusewhentheflowisnonaxialtothefaceofthetube.1.3Thispracticemaybeusedforthecalibrationofthermalanemometersforgasvelocitiesinexcessof3m/s(10ft/s).1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,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】:英语