Reference number
ISO 7194:2008
© ISO 2024
International Standard
ISO 7194:2008
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
Edition 2
2008-07
Published (Edition 2, 2008)

ISO 7194:2008

Language
Format
CHF 151
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Abstract

ISO 7194:2008 specifies velocity-area methods for measuring flow in swirling or asymmetric flow conditions in circular ducts by means of current-meters of Pitot static tubes.

ISO 7194:2008 specifies the measurements required, the precautions to be taken, the corrections to apply, and describes the additional uncertainties which are introduced when a measurement in asymmetric or swirling flow has to be made.

Only flows with a negligible radial component are considered, however. Furthermore, it is not possible to make a measurement in accordance with ISO 7194:2008 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 of asymmetry Y (defined within ISO 7194:2008) is greater than 0,15.

ISO 7194:2008 deals only with instruments for measuring local velocity as defined in ISO 3354 and ISO 3966. If Pitot static tubes are used, ISO 7194:2008 applies only to flows where the Mach number corresponding to local velocities does not exceed 0,25.

General information

  • Status
     : Published
    Publication date
     : 2008-07
    Stage
    : Withdrawal ballot initiated [95.20]
  • Edition
     : 2
    Number of pages
     : 27
  • Technical Committee :
    ISO/TC 30/SC 5
    ICS :
    17.120.10 
  • RSS updates

Life cycle

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This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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