19/30374354 DC - BS EN ISO 5167-3. Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full. Part 3. Nozzles and Venturi nozzles

19/30374354 DC

BS EN ISO 5167-3. Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full. Part 3. Nozzles and Venturi nozzles

Status : Current, Draft for public comment   Published : October 2019

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This part of ISO 5167 specifies the geometry and method of use (installation and operating conditions) of nozzles and Venturi nozzles when they are inserted in a conduit running full to determine the flowrate of the fluid flowing in the conduit.

This part of ISO 5167 also provides background information for calculating the flowrate and is applicable in conjunction with the requirements given in ISO 5167-1.

This part of ISO 5167 is applicable to nozzles and Venturi nozzles in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. In addition, each of the devices can only be used within specified limits of pipe size and Reynolds number. It is not applicable to the measurement of pulsating flow. It does not cover the use of nozzles and Venturi nozzles in pipe sizes less than 50 mm or more than 630 mm, or where the pipe Reynolds numbers are below 10 000.

This part of ISO 5167 deals with

  1. three types of standard nozzles

    1. ISA1

      1

      ISA is the abbreviation for the International Federation of the National Standardizing Associations, which was superseded by ISO in 1946

      1932 nozzle;
    2. the long radius nozzle2

      2

      The long radius nozzle differs from the ISA 1932 nozzle in shape and in the position of the pressure tappings.

      ;
    3. the throat-tapped nozzle

  2. the Venturi nozzle.

The three types of standard nozzle are fundamentally different and are described separately in this part of ISO 5167. The Venturi nozzle has the same upstream face as the ISA 1932 nozzle, but has a divergent section and, therefore, a different location for the downstream pressure tappings, and is described separately. This design has a lower pressure loss than a similar nozzle. For all of these nozzles and for the Venturi nozzle direct calibration experiments have been made, sufficient in number, spread and quality to enable coherent systems of application to be based on their results and coefficients to be given with certain predictable limits of uncertainty.




Standard Number19/30374354 DC
TitleBS EN ISO 5167-3. Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full. Part 3. Nozzles and Venturi nozzles
StatusCurrent, Draft for public comment
Publication Date31 October 2019
Normative References(Required to achieve compliance to this standard)ISO 4006:1991, ISO 5167-1:2003
Informative References(Provided for Information)ISO 4288:1996, ISO/TR 9464:1998, ISO/TR 3313:1998, ISO/TR 5168:1998
International RelationshipsISO/DIS 5167-3
Draft Expiry Date24 December 2019
DescriptorsNozzles (flow), Conduits (hydraulic), Pressure, Fluid flow, Measurement
ICS17.120.10
Title in FrenchMesure de débit des fluides au moyen d'appareils déprimogènes insérés dans des conduites en charge de section circulaire — Partie 3: Tuyères et Venturi-tuyères Partie 3: Tuyères et Venturi-tuyères
CommitteeCPI/30
PublisherBSI
FormatA4
DeliveryYes
Pages49
File Size1.368 MB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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