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  • BSI
    BS 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 statics tubes
    Edition: 2008
    $442.60
    / user per year

Description of BS ISO 7194:2008 2008

This International Standard specifies velocity-area methods for measuring flow in swirling or asymmetric flow conditions 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 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 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 of asymmetry 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 3354 and ISO 3966. If Pitot static tubes are used, this International Standard applies only to flows where the Mach number corresponding to local velocities does not exceed 0,25.



Standard NumberBS ISO 7194:2008
TitleMeasurement 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 statics tubes
StatusProposed for Withdrawal
Publication Date2008-08-31
ReplacesBS 1042-2.3:1984
Identical National Standard OfISO 7194:2008
DescriptorsTurbulent flow, Conduits (hydraulic), Rate flowmeters, Asymmetrical, Channel flow, Flow, Differential-pressure flowmeters, Flow rates, Velocity measurement, Flowmeters, Circular shape, Pitot tubes, Errors, Flow measurement, Estimation, Pipes
ICS17.120.10 Flow in closed conduits
CommitteeCPI/30/5
ISBN978 0 580 62862 7
PublisherBSI
Pages38

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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