EN ISO 5167-4:2003
(Main)Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 4: Venturi tubes (ISO 5167-4:2003)
Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 4: Venturi tubes (ISO 5167-4:2003)
ISO 5167-4:2003 specifies the geometry and method of use (installation and operating conditions) of Venturi tubes when they are inserted in a conduit running full to determine the flowrate of the fluid flowing in the conduit.
ISO 5167-4:2003 also provides background information for calculating the flow-rate and is applicable in conjunction with the requirements given in ISO 5167-1.
ISO 5167-4:2003 is applicable only to Venturi tubes in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. In addition, each of these devices can only be used within specified limits of pipe size, roughness, diameter ratio and Reynolds number. ISO 5167-4:2003 is not applicable to the measurement of pulsating flow. It does not cover the use of Venturi tubes in pipes sized less than 50 mm or more than 1 200 mm, or for where the pipe Reynolds numbers are below 20 000.
ISO 5167-4:2003 deals with the three types of classical Venturi tubes: cast, machined and rough welded sheet-iron.
A Venturi tube is a device which consists of a convergent inlet connected to a cylindrical throat which is in turn connected to a conical expanding section called the "divergent". The differences between the values of the uncertainty of the discharge coefficient for the three types of classical Venturi tube show, on the one hand, the number of results available for each type of classical Venturi tube and, on the other hand, the more or less precise definition of the geometric profile. The values are based on data collected many years ago. Venturi nozzles (and other nozzles) are dealt with in ISO 5167-3.
Durchflussmessung von Fluiden mit Drosselgeräten in voll durchströmten Leitungen mit Kreisquerschnitt - Teil 4: Venturirohre (ISO 5167-4:2003)
Dieser Teil von ISO 5167 legt die geometrische Form und Maße sowie die Anwendung (Einbau- und Betriebsbe-dingungen) von Venturirohren, die in eine voll durchströmte Rohrleitung zur Bestimmung des Durchflusses eingebaut sind, fest.
Dieser Teil von ISO 5167 enthält grundlegende Informationen für die Durchflussberechnung und ist gemeinsam mit den in ISO 5167-1 festgelegten Anforderungen anzuwenden.
Dieser Teil von ISO 5167 gilt nur für Venturirohre, in denen die Strömung im gesamten Messquerschnitt im Unterschallbereich liegt und wo das Fluid als einphasig betrachtet werden kann. Weiterhin kann jedes dieser Geräte nur innerhalb festgelegter Grenzen für Rohrdurchmesser, Rohrrauheit, Durchmesserverhältnis und Reynolds-Zahl verwendet werden. Dieser Teil von ISO 5167 gilt nicht für Messungen bei pulsierenden Strömungen, für Rohrdurchmesser kleiner als 50 mm oder größer als 1 200 mm und für Reynolds-Zahlen unter 2 x 105.
Dieser Teil von ISO 5167 behandelt drei Arten von Venturirohren
a) gussrauhe;
b) bearbeitete;
c) rauhe, aus Stahlblech geschweißte.
Das Venturirohr ist ein Drosselgerät, das aus einem sich verengendem Einlaufteil, an das sich ein zylindrischer Teil anschließt und einem konischen Expansionsteil, Diffusor genannt, besteht. Für die drei Bauarten des klassischen Venturirohres sind die unterschiedlichen Werte für die Unsicherheit der Durchflusskoeffizienten einerseits auf den vorliegenden Umfang der Untersuchungsergebnisse für jede Bauart des klassischen Venturirohres und andererseits auf die mehr oder weniger genaue Definition des geometrischen Profils zurückzuführen. Die Werte beruhen auf Daten, die über viele Jahre gesammelt wurden. Venturidüsen (und andere Düsen) werden in ISO 5167-3 behandelt.
Mesure de débit des fluides au moyen d'appareils déprimogènes insérés dans des conduites en charge de section circulaire - Partie 4: Tubes de Venturi (ISO 5167-4:2003)
L'ISO 5167-4:2003 spécifie la géométrie et le mode d'emploi (conditions d'installation et d'utilisation) de tubes de Venturi insérés dans une conduite en charge dans le but de déterminer le débit du fluide s'écoulant dans cette conduite.
L'ISO 5167-4:2003 fournit également des informations de fond nécessaires au calcul de ce débit, et il convient de l'utiliser conjointement avec les exigences stipulées dans l'ISO 5167-1.
L'ISO 5167-4:2003 est applicable uniquement aux tubes de Venturi utilisés dans les limites spécifiées de diamètre de conduite, de rugosité, de rapport des diamètres et de nombre de Reynolds, dans lesquels l'écoulement reste subsonique dans tout le tronçon de mesurage contenant un fluide pouvant être considéré comme monophasique. Elle n'est pas applicable au mesurage d'un écoulement pulsé. Elle ne couvre pas l'utilisation de tubes de Venturi dans des conduites de diamètre inférieur à 50 mm ou supérieur à 1 200 mm, ni les cas où les nombres de Reynolds rapportés à la tuyauterie sont inférieurs à 2 x 105.
L'ISO 5167-4:2003 traite de trois types de tubes de Venturi classiques: a) à convergent brut de fonderie; b) usiné; c) en tôle soudée brute.
Un tube de Venturi se compose d'un convergent d'entrée, relié à un col cylindrique qui est, à son tour, relié à un évasement de forme tronconique appelé «divergent». Les différences entre les valeurs de l'incertitude du coefficient de décharge pour les trois types de tube de Venturi classique indiquent, d'une part, le nombre de résultats disponibles pour chaque type de tube de Venturi classique et, d'autre part, la définition plus ou moins précise du profil géométrique. Les valeurs sont fondées sur des données recueillies il y a de nombreuses années. Les Venturi-tuyères (et d'autres tuyères) font l'objet de l'ISO 5167-3.
Merjenje pretoka fluida na osnovi tlačne razlike, povzročene z napravo, vstavljeno v polno zapolnjen vod s krožnim prerezom – 4. del: Venturijeve cevi (ISO 5167-4:2003)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2004
1DGRPHãþD
SIST EN ISO 5167-1:1997
SIST EN ISO 5167-1:1997/A1:2001
0HUMHQMHSUHWRNDIOXLGDQDRVQRYLWODþQHUD]OLNHSRY]URþHQH]QDSUDYRYVWDYOMHQR
YSROQR]DSROQMHQYRGVNURåQLPSUHUH]RP±GHO 9HQWXULMHYHFHYL ,62
Measurement of fluid flow by means of pressure differential devices inserted in circular
cross-section conduits running full - Part 4: Venturi tubes (ISO 5167-4:2003)
Durchflussmessung von Fluiden mit Drosselgeräten in voll durchströmten Leitungen mit
Kreisquerschnitt - Teil 4: Venturirohre (ISO 5167-4:2003)
Mesure de débit des fluides au moyen d'appareils déprimogenes insérés dans des
conduites en charge de section circulaire - Partie 4: Tubes de Venturi (ISO 5167-4:2003)
Ta slovenski standard je istoveten z: EN ISO 5167-4:2003
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.
EUROPEAN STANDARD
EN ISO 5167-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2003
ICS 17.120.10 Together with EN ISO 5167-1:2003,
EN ISO 5167-2:2003 and EN ISO 5167-3:2003,
supersedes EN ISO 5167-1:1995
English version
Measurement of fluid flow by means of pressure differential
devices inserted in circular cross-section conduits running full -
Part 4: Venturi tubes (ISO 5167-4:2003)
Mesure de débit des fluides au moyen d'appareils Durchflussmessung von Fluiden mit Drosselgeräten in voll
déprimogènes insérés dans des conduites en charge de durchströmten Leitungen mit Kreisquerschnitt - Teil 4:
section circulaire - Partie 4: Tubes de Venturi (ISO 5167- Venturirohre (ISO 5167-4:2003)
4:2003)
This European Standard was approved by CEN on 20 February 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5167-4:2003 E
worldwide for CEN national Members.
CORRECTED 2003-09-03
Foreword
This document (EN ISO 5167-4:2003) has been prepared by Technical Committee ISO/TC 30
"Measurement of fluid flow in closed conduits" in collaboration with CMC.
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 September 2003, and conflicting national
standards shall be withdrawn at the latest by September 2003.
This document, together with EN ISO 5167-1:2003, EN ISO 5167-2:2003 and EN ISO 5167-3:2003,
supersedes EN ISO 5167-1:1995.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the
United Kingdom.
Endorsement notice
The text of ISO 5167-4:2003 has been approved by CEN as EN ISO 5167-4:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE Where an International Publication has been modified by common modifications, indicated by
(mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 4006 1991 Measurement of fluid flow in closed EN 24006 1993
conduits - Vocabulary and symbols
ISO 5167-1 2003 Measurement of fluid flow by means of EN ISO 5167-1 2003
pressure differential devices inserted in
circular cross-section conduits running
full - Part 1: General principles and
requirements
INTERNATIONAL ISO
STANDARD 5167-4
First edition
2003-03-01
Measurement of fluid flow by means of
pressure differential devices inserted in
circular cross-section conduits running
full —
Part 4:
Venturi tubes
Mesure de débit des fluides au moyen d'appareils déprimogènes
insérés dans des conduites en charge de section circulaire —
Partie 4: Tubes de Venturi
Reference number
ISO 5167-4:2003(E)
©
ISO 2003
ISO 5167-4:2003(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2003
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2003 — All rights reserved
ISO 5167-4:2003(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 2
3 Terms and definitions. 2
4 Principles of the method of measurement and computation. 2
5 Classical Venturi tubes. 3
5.1 Field of application . 3
5.2 General shape . 3
5.3 Material and manufacture. 7
5.4 Pressure tappings. 7
5.5 Discharge coefficient, C . 8
5.6 Expansibility [expansion] factor, ε . 9
5.7 Uncertainty of the discharge coefficient C. 10
5.8 Uncertainty of the expansibility [expansion] factor ε. 10
5.9 Pressure loss. 10
6 Installation requirements . 11
6.1 General. 11
6.2 Minimum upstream and downstream straight lengths for installation between various
fittings and the Venturi tube . 11
6.3 Flow conditioners . 15
6.4 Additional specific installation requirements for classical Venturi tubes . 15
Annex A (informative) Table of expansibility [expansion] factor . 17
Annex B (informative) Classical Venturi tubes used outside the scope of ISO 5167-4. 18
Annex C (informative) Pressure loss in a classical Venturi tube . 22
Bibliography . 24
ISO 5167-4:2003(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 5167-4 was prepared by Technical Committee ISO/TC 30, Measurement of fluid flow in closed conduits,
Subcommittee SC 2, Pressure differential devices.
This first edition of ISO 5167-4, together with the second edition of ISO 5167-1 and the first editions of
ISO 5167-2 and ISO 5167-3, cancels and replaces the first edition of ISO 5167-1:1991, which has been
technically revised, and ISO 5167-1:1991/Amd.1:1998.
ISO 5167 consists of the following parts, under the general title Measurement of fluid flow by means of
pressure differential devices inserted in circular cross-section conduits running full:
Part 1: General principles and requirements
Part 2: Orifice plates
Part 3: Nozzles and Venturi nozzles
Part 4: Venturi tubes
iv © ISO 2003 — All rights reserved
ISO 5167-4:2003(E)
Introduction
ISO 5167, divided into four parts, covers the geometry and method of use (installation and operating
conditions) of orifice plates, nozzles and Venturi tubes when they are inserted in a conduit running full to
determine the flowrate of the fluid flowing in the conduit. It also gives necessary information for calculating the
flowrate and its associated uncertainty.
ISO 5167 is applicable only to pressure differential devices in which the flow remains subsonic throughout the
measuring section and where the fluid can be considered as single-phase, but is not applicable to the
measurement of pulsating flow. Furthermore, each of these devices can only be used within specified limits of
pipe size and Reynolds number.
ISO 5167 deals with devices for which 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 un
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.