ISO 7194:2008
Current
The latest, up-to-date edition.
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
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English, French
10-07-2008
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.
DevelopmentNote |
Supersedes ISO/DIS 7194. (07/2008)
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DocumentType |
Standard
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Pages |
27
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PublisherName |
International Organization for Standardization
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Status |
Current
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Supersedes |
Standards | Relationship |
BS ISO 7194:2008 | Identical |
NF ISO 7194 : 1993 | Identical |
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I.S. CEN TR 12101-4:2006 | SMOKE AND HEAT CONTROL SYSTEMS - PART 4: INSTALLED SHEVS SYSTEMS FOR SMOKE AND HEAT VENTILATION |
ISO 9906:2012 | Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1, 2 and 3 |
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BS EN ISO 5198:1999 | Centrifugal, mixed flow and axial pumps. Code for hydraulic performance tests. Precision class |
EN ISO 6817:1995 | Measurement of conductive liquid flow in closed conduits - Methods using electromagnetic flow-meters (ISO 6817:1992) |
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EN ISO 9906:2012 | Rotodynamic pumps - Hydraulic performance acceptance tests - Grades 1, 2 and 3 (ISO 9906:2012) |
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ISO 6817:1992 | Measurement of conductive liquid flow in closed conduits Method using electromagnetic flowmeters |
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ISO 5168:2005 | Measurement of fluid flow — Procedures for the evaluation of uncertainties |
ISO 3354:2008 | Measurement of clean water flow in closed conduits — Velocity-area method using current-meters in full conduits and under regular flow conditions |
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ISO 3966:2008 | Measurement of fluid flow in closed conduits Velocity area method using Pitot static tubes |
ISO 3455:2007 | Hydrometry Calibration of current-meters in straight open tanks |
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