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SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN ISO 5167-2:2004
Merjenje pretoka fluida na osnovi tlačne razlike, povzročene z napravo, vstavljeno
v polno zapolnjen vod s krožnim prerezom - 2. del: Zaslonke (ISO 5167-2:2022)
Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full - Part 2: Orifice plates (ISO 5167-2:2022)
Durchflussmessung von Fluiden mit Drosselgeräten in voll durchströmten Leitungen mit
Kreisquerschnitt - Teil 2: Blenden (ISO 5167-2:2022)
Mesurage de débit des fluides au moyen d'appareils déprimogènes insérés dans des
conduites en charge de section circulaire - Partie 2: Diaphragmes (ISO 5167-2:2022)
Ta slovenski standard je istoveten z: EN ISO 5167-2:2022
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 5167-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 17.120.10 Supersedes EN ISO 5167-2:2003
English Version
Measurement of fluid flow by means of pressure
differential devices inserted in circular cross-section
conduits running full - Part 2: Orifice plates (ISO 5167-
2:2022)
Mesurage de 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 2: Diaphragmes (ISO 5167- Teil 2: Blenden (ISO 5167-2:2022)
2:2022)
This European Standard was approved by CEN on 17 June 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, Turkey 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 5167-2:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 5167-2:2022) 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 December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
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 5167-2:2003.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 5167-2:2022 has been approved by CEN as EN ISO 5167-2:2022 without any
modification.
INTERNATIONAL ISO
STANDARD 5167-2
Second edition
2022-06
Measurement of fluid flow by means of
pressure differential devices inserted
in circular cross-section conduits
running full —
Part 2:
Orifice plates
Mesurage de débit des fluides au moyen d'appareils déprimogènes
insérés dans des conduites en charge de section circulaire —
Partie 2: Diaphragmes
Reference number
ISO 5167-2:2022(E)
ISO 5167-2:2022(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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Published in Switzerland
ii
ISO 5167-2:2022(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
4 Principles of the method of measurement and computation . 2
5 Orifice plates . 2
5.1 Description . 2
5.1.1 General . 2
5.1.2 General shape . 2
5.1.3 Upstream face A . 3
5.1.4 Downstream face B . 4
5.1.5 Thicknesses E and e . 4
5.1.6 Angle of bevel, α . 5
5.1.7 Edges G, H and I . 5
5.1.8 Diameter of orifice, d . 5
5.1.9 Bidirectional plates . 6
5.1.10 Material and manufacture . 6
5.2 Pressure tappings . 6
5.2.1 General . 6
5.2.2 Orifice plate with D and D/2 tappings or flange tappings . 6
5.2.3 Orifice plate with corner tappings . 8
5.3 Coefficients and corresponding uncertainties of orifice plates . 11
5.3.1 Limits of use . 11
5.3.2 Coefficients .12
5.3.3 Uncertainties .13
5.4 Pressure loss, Δϖ . 14
6 Installation requirements .15
6.1 General . 15
6.2 Minimum upstream and downstream straight lengths for installation between
various fittings and the orifice plate . 16
6.3 Flow conditioners . 21
6.3.1 General . 21
6.3.2 19-tube bundle flow straightener (1998) . 21
6.3.3 The Zanker flow conditioner plate . 27
6.4 Circularity and cylindricality of the pipe .28
6.5 Location of orifice plate and carrier rings .29
6.6 Method of fixing and gaskets . 30
7 Flow calibration of orifice meters .30
7.1 General .30
7.2 Test facility . 31
7.3 Meter installation . . 31
7.4 Design of the test programme . 31
7.5 Reporting the calibration results . 31
7.6 Uncertainty analysis of the calibration .
...