ISO 24062:2023

Measurement of fluid flow in closed conduits — Clamp-on ultrasonic transit-time meters for liquids and gases

This document specifies requirements and recommendations for non-intrusive (clamp-on) ultrasonic flowmeters (USMs), which use the transit time of ultrasonic signals to measure the volumetric flowrate in closed conduits. Transit time flowmeters are predominantly used on single-phase fluids (liquid and gases) but can also be used where small quantities of additional phases are present. This document specifies performance, calibration, and output characteristics, and deals with installation conditions.

Mesurage du débit des fluides dans les conduites fermées — Débitmètres non intrusifs à ultrasons à temps de transit pour les liquides et les gaz

Le présent document spécifie les exigences et recommandations relatives aux débitmètres à ultrasons non intrusifs (de type accrochable), qui utilisent le temps de transit des signaux ultrasonores pour mesurer le débit-volume dans les conduites fermées. Les débitmètres à temps de transit sont principalement utilisés pour les fluides monophasiques (liquides et gaz), mais peuvent également être utilisés lorsque d’autres phases sont présentes en petites quantités. Le présent document spécifie les caractéristiques de performances, d’étalonnage et de sortie, et traite des conditions d’installation.

General Information

• Status: Published
• Publication Date: 19-Dec-2023
• ICS: 17.120.10 - Flow in closed conduits
• Technical Committee: ISO/TC 30/SC 5 - Velocity and mass methods
• Drafting Committee: ISO/TC 30/SC 5 - Velocity and mass methods
• Current Stage: 6060 - International Standard published
• Start Date: 20-Dec-2023
• Due Date: 07-Oct-2023
• Completion Date: 20-Dec-2023

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 24062
ISO/TC 30/SC 5
Measurement of fluid flow in closed
Secretariat: SNV
conduits — Clamp-on ultrasonic
Voting begins on:
2023-10-03 transit-time meters for liquids and
gases
Voting terminates on:
2023-11-28
Mesurage du débit des fluides dans les conduites fermées —
Débitmètres non-intrusifs à ultrasons à temps de transit pour les
liquides et les gaz
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 24062:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 24062:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 24062
ISO/TC 30/SC 5
Measurement of fluid flow in closed
Secretariat: SNV
conduits — Clamp-on ultrasonic
Voting begins on:
transit-time meters for liquids and
gases
Voting terminates on:
Mesurage du débit des fluides dans les conduites fermées —
Débitmètres non-intrusifs à ultrasons à temps de transit pour les
liquides et les gaz
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 24062:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 24062:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.2 Meter design . 2
3.3 Thermodynamic conditions . . 2
3.4 Statistics . 3
3.5 Calibration . 4
3.6 Symbols and subscripts . 5
4 Principle of measurement .
...

ISO /FDIS 24062:2023(E)
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line: 0 pt, Tab stops: Not at 21.6 pt
ISO TC 30/SC 05/WG 15
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at 18 pt
Secretariat: SNV
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Date: 2023-09-09xx
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Measurement of fluid flow in closed conduits — Clamp-on ultrasonic transit-time meters
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for liquids and gases
Style Definition: ANNEX
Mesurage du débit des fluides dans les conduites fermées — Débitmètres non-intrusifs à ultrasons
Style Definition: AMEND Terms Heading: Font: Bold
à temps de transit pour les liquides et les gaz
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Font: Bold
Formatted: French (Switzerland)
Formatted: French (Switzerland)
Formatted: French (Switzerland)
Formatted: Font: Cambria

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ISO/FDIS 24062:2023(E)
© ISO 2023
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 the internet or an intranet, without prior written
permission. Permission can be requested from either ISO at the address below or ISO’s member body
in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 24062:2023(E)
Contents
Foreword . vi
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Quantities . 1
3.1.1 volume flowrate . 1
3.1.2 mean flow velocity . 1
3.1.3 path velocity . 2
3.1.4 Reynolds number . 2
3.2 Meter design . 2
3.2.1 ultrasonic path . 2
3.2.2 electronic unit . 2
3.3 Thermodynamic conditions . 2
3.3.1 metering conditions . 2
3.3.2 standard conditions . 2
3.4 Statistics . 3
3.4.1 error . 3
3.4.2 repeatability (of results of measurements) . 3
3.4.3 reproducibility (of results of measurements) . 3
3.4.4 resolution .
...