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SLOVENSKI STANDARD
01-januar-2023
Nadomešča:
SIST EN ISO 5167-3:2020
Merjenje pretoka fluida na osnovi tlačne razlike, povzročene z napravo, vstavljeno
v polno zapolnjen vod s krožnim prerezom - 3. del: Šobe in Venturijeve šobe (ISO
5167-3:2022)
Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full - Part 3: Nozzles and Venturi nozzles (ISO 5167-
3:2022)
Durchflussmessung von Fluiden mit Drosselgeräten in voll durchströmten Leitungen mit
Kreisquerschnitt - Teil 3: Düsen und Venturidüsen (ISO 5167-3:2022)
Mesurage du débit des fluides au moyen d'appareils déprimogènes insérés dans des
conduites en charge de section circulaire - Partie 3: Tuyères et Venturi-tuyères (ISO
5167-3:2022)
Ta slovenski standard je istoveten z: EN ISO 5167-3:2022
ICS:
17.120.10 Pretok v zaprtih vodih Flow in closed conduits
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 5167-3
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 17.120.10 Supersedes EN ISO 5167-3:2020
English Version
Measurement of fluid flow by means of pressure
differential devices inserted in circular cross-section
conduits running full - Part 3: Nozzles and Venturi nozzles
(ISO 5167-3:2022)
Mesurage du débit des fluides au moyen d'appareils Durchflussmessung von Fluiden mit Drosselgeräten in
déprimogènes insérés dans des conduites en charge de voll durchströmten Leitungen mit Kreisquerschnitt -
section circulaire - Partie 3: Tuyères et Venturi-tuyères Teil 3: Düsen und Venturidüsen (ISO 5167-3:2022)
(ISO 5167-3:2022)
This European Standard was approved by CEN on 22 October 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5167-3:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 5167-3:2022) has been prepared by Technical Committee ISO/TC 30
"Measurement of fluid flow in closed conduits" in collaboration with CCMC.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by May 2023, and conflicting national standards shall be
withdrawn at the latest by May 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5167-3:2020.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 5167-3:2022 has been approved by CEN as EN ISO 5167-3:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 5167-3
Third edition
2022-10
Measurement of fluid flow by means of
pressure differential devices inserted
in circular cross-section conduits
running full —
Part 3:
Nozzles and Venturi nozzles
Mesurage du débit des fluides au moyen d'appareils déprimogènes
insérés dans des conduites en charge de section circulaire —
Partie 3: Tuyères et Venturi-tuyères
Reference number
ISO 5167-3:2022(E)
ISO 5167-3:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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or ISO’s member body in the country of the requester.
ISO copyright office
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Email: [email protected]
Website: www.iso.org
Published in Switzerland
ii
ISO 5167-3:2022(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principles of the method of measurement and computation . 2
5 Nozzles and Venturi nozzles . 3
5.1 ISA 1932 nozzle . 3
5.1.1 General shape . 3
5.1.2 Nozzle profile . 3
5.1.3 Downstream face . 5
5.1.4 Material and manufacture . 5
5.1.5 Pressure tappings . 5
5.1.6 Coefficients of ISA 1932 nozzles . 7
5.1.7 Uncertainties . 8
5.1.8 Pressure loss, Δϖ . 8
5.2 Long radius nozzles . 9
5.2.1 General . 9
5.2.2 Profile of high-ratio nozzle . 9
5.2.3 Profile of low-ratio nozzle . 11
5.2.4 Material and manufacture .12
5.2.5 Pressure tappings .12
5.2.6 Coefficients of long radius nozzles .12
5.2.7 Uncertainties .13
5.2.8 Pressure loss, Δϖ .13
5.3 Throat-tapped nozzles . 13
5.3.1 General .13
5.3.2 Profile of throat-tapped nozzle. 14
5.3.3 Material and manufacturing . 15
5.3.4 Pressure tappings . 15
5.3.5 Coefficients . 16
5.3.6 Uncertainties . 16
5.3.7 Calibration and extrapolation . 17
5.3.8 Pressure Loss . 17
5.4 Venturi nozzles . 18
5.4.1 General shape . 18
5.4.2 Material and manufacture . 20
5.4.3 Pressure tappings . 20
5.4.4 Coefficients . 21
5.4.5 Uncertainties .22
5.4.6 Pressure loss .22
6 Installation requirements .23
6.1 General .23
6.2 Minimum upstream and downstream straight leng
...