標(biāo)準(zhǔn)號(hào)：ISO 7194-2008
中文標(biāo)準(zhǔn)名稱(chēng)：封閉管道中流量的測(cè)量.使用流量計(jì)或皮托靜壓管測(cè)量圓管中渦流或不對(duì)稱(chēng)流動(dòng)條件下流量用速度面積法
英文標(biāo)準(zhǔn)名稱(chēng)：Measurement of fluid flow in closed conduits - Velocity-area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes
標(biāo)準(zhǔn)類(lèi)型：A50
發(fā)布日期：2008/7/15 12:00:00
實(shí)施日期：1999/12/31 12:00:00
中國(guó)標(biāo)準(zhǔn)分類(lèi)號(hào)：A50
國(guó)際標(biāo)準(zhǔn)分類(lèi)號(hào)：17.120.10
引用標(biāo)準(zhǔn)：ISO/TR 3313;ISO 3354-2008;ISO 3455-2007;ISO 3966-2008;ISO 5168;ISO 4006
適用范圍：This International Standard specifies velocity-area methods for measuring flow in swirling or asymmetric flowconditions in circular ducts by means of current-meters or Pitot static tubes.It specifies the measurements required, the precautions to be taken, the corrections to apply, and describesthe additional uncertainties which are introduced when a measurement in asymmetric or swirling flow has tobe made.Only flows with a negligible radial component are considered, however. Furthermore, it is not possible to makea measurement in accordance with this International Standard if, at any point in the measuring cross-section,the local velocity makes an angle of greater than 40~ with the axis of the duct, or where the index ofasymmetry Y (defined in Annex F) is greater than 0,15.This International Standard deals only with instruments for measuring local velocity as defined in ISO 3354and ISO 3966. If Pitot static tubes are used, this International Standard applies only to flows where the Machnumber corresponding to local velocities does not exceed 0,25.