BS EN 24006:1993This British Standard, having been prepared under the direction of the Industrial-process Measurement and Control Standards Policy Committee, was published under the
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24006:1993 ISO 4006:1991
Incorporating Amendment No 1
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This British Standard, having
been prepared under the
direction of the Industrial-process
Measurement and Control
Standards Policy Committee,
was published under the
authority of the Standards
Board and comes
into effect on
31 October 1991
© BSI 07-1999
First published March 1980
Second edition October 1991
The following BSI references
relate to the work on this
British Compressed Air SocietyBritish Gas plc
Department of Energy (Gas and Oil Measurement Branch)Department of Trade and Industry (National Engineering Laboratory)Electricity Industry in United Kingdom
Energy Industries CouncilGAMBICA (BEAMA Ltd.)Institute of Measurement and ControlInstitute of Petroleum
Institute of Trading Standards AdministrationInstitution of Gas Engineers
Institution of Mechanical EngineersSociety of British Gas IndustriesWater Services Association of England and Wales
Amendments issued since publication
Amd No Date Comments
7978 October 1993 Indicated by a sideline in the margin
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Contents
PageCommittees responsible Inside front cover
6 General terms related to the devices 18
7 Differential pressure devices 20
Figure 3 — Square-edged orifice plate with piezometer ring 22
Figure 6 — Classical Venturi tube 24Figure 7 — Truncated and conventional Venturi nozzle 25Figure 8 — Toroidal throat Venturi nozzle 27Figure 9 — Cylindrical throat Venturi nozzle 27Figure 10 — Propeller-type current-meter 28Figure 11 — Example of a Pitot static tube 29
Figure 14 — Liquid displacement system 35
Figure 17 — Principle of operation of a fluidic flowmeter, shown with the flow in one of the alternative modes 37Figure 18 — Principle of operation of the vortex-shedding meter 38Figure 19 — Principle of operation of the vortex precession meter 38Figure 20 — Diagram of a wake oscillator 38
Figure 22 — Principle of operation of a cone-and-float meter 40Figure 23 — Orifice-and-plug meter 41
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PageFigure 25 — Spring-loaded variable-area variable-head meter 43Figure 26 — Principle of operation of the single-path
Publication(s) referred to Inside back cover
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In 1993 the European Committee for Standardization (CEN) accepted ISO 4006:1991 as European Standard EN 24006:1993 As a consequence of implementing the European Standard this British Standard is renumbered as
BS EN 24006 and any reference to BS 5875:1991 should be read as a reference to
BS EN 24006
Both the English and French texts are given in this British Standard, as presented in the original ISO 4006, to facilitate production
A related British Standard to ISO 772:1988 is BS 3680 “Measurement of liquid
A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application
Compliance with a British Standard does not of itself confer immunity from legal obligations.
Cross-references
International standard Corresponding British Standard
ISO 3534:1977a BS 5532 Statistical terminology
Part 1:1978 Glossary of terms relating to probability and general terms relating to statistics
(Identical)ISO 5167:1980b BS 1042 Measurement of fluid flow in closed conduits
Section 1.1:1981 Specification for square-edged orifice plates, nozzles and venturi tubes inserted in circular cross section conduits running full
(Technically equivalent)ISO 5168:1978c BS 5844:1980 Methods of measurement of fluid flow:
estimation of uncertainty of a flow rate measurement
1) A revised edition of BS 3680-1 is in preparation.
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Trang 7EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN 24006 June 1993
Mesure de débit des fluides dans les conduites
fermées — Vocabulaire et symboles
(ISO 4006:1991)
Durchflußmessung von Fluiden in geschlossenen Leitungen — Begriffe und Formelzeichen (ISO 4006:1991)
This European Standard was approved by CEN on 1993-06-18 CEN membersare bound to comply with the CEN/CENELEC Internal Regulations whichstipulate the conditions for giving this European Standard the status of anational standard without any alteration
Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to anyCEN member
This European Standard exists in three official versions (English, French,German) A version in any other language made by translation under theresponsibility of a CEN member into its own language and notified to theCentral Secretariat has the same status as the official versions
CEN members are the national standards bodies of Austria, Belgium,Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland andUnited Kingdom
CEN
European Committee for StandardizationComité Européen de NormalisationEuropäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
© 1993 Copyright reserved to CEN members
Ref No EN 24006:1993 E
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© BSI 07-1999
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Foreword
In 1991, ISO 4006:1991 Measurement of fluid flow
in closed conduits — Vocabulary and symbols was
submitted to the CEN Primary Questionnaire
procedure
Following Resolution BT C 42/1992, ISO 4006:1991
was submitted to the formal vote; the result was
positive
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 1993, and conflicting national standards
shall be withdrawn at the latest by December 1993
According to the CEN/CENELEC Internal
Regulations, the following countries are bound to
implement this European Standard: Austria,
Belgium, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom
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© BSI 07-1999
Publication(s) referred to
See national foreword
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