SIST EN ISO 16823:2025

Non-destructive testing - Ultrasonic testing - Through-transmission technique (ISO 16823:2025)

This document specifies the principles of ultrasonic through-transmission techniques.
Through-transmission techniques can be used for:
—     detection of discontinuities;
—     determination of sound attenuation.
The general principles required for the use of ultrasonic testing of industrial products are described in ISO 16810.
The through-transmission technique is used for the testing of flat products, e.g. plates and sheets.
Further, it can be used for tests, for example:
—     where the shape, dimensions or orientation of possible discontinuities are unfavourable for direct reflection;
—     of materials with high sound attenuation;
—     on thin test objects.

Zerstörungsfreie Prüfung - Ultraschallprüfung - Durchschallungstechnik (ISO 16823:2025)

Dieses Dokument legt die Grundsätze der Ultraschall-Durchschallungstechnik fest.
Die Durchschallungstechnik kann angewendet werden
   zum Nachweis von Inhomogenitäten;
   zur Bestimmung der Schallschwächung.
Die allgemeinen Grundsätze, die zur Anwendung der Ultraschallprüfung an Industrieerzeugnissen erforderlich sind, werden in ISO 16810 beschrieben.
Die Durchschallungstechnik wird zur Prüfung von Flacherzeugnissen wie z. B. Blechen angewendet.
Weiterhin kann sie zum Beispiel für Prüfungen angewendet werden,
   bei denen Form, Maße oder Orientierung möglicher Inhomogenitäten für eine direkte Reflexion ungünstig sind;
   bei Werkstoffen mit hoher Schallschwächung;
   an dünnen Prüfgegenständen.

Essais non destructifs - Contrôle par ultrasons - Technique par transmission (ISO 16823:2025)

Le présent document spécifie les principes des techniques de contrôle ultrasonore par transmission.
Les techniques par transmission peuvent être utilisées pour:
—     la détection des discontinuités;
—     la détermination de l’atténuation acoustique.
Les principes généraux exigés pour l’utilisation du contrôle par ultrasons de produits industriels sont décrits dans l’ISO 16810.
La technique par transmission est utilisée pour le contrôle de produits plats, par exemple plaques et tôles.
De plus, elle peut être utilisée par exemple pour:
—     d’éventuelles discontinuités dont la forme, les dimensions ou l’orientation sont défavorables au contrôle par réflexion;
—     des matériaux avec une atténuation acoustique élevée;
—     des pièces à contrôler minces.

Neporušitvene preiskave - Ultrazvočne preiskave - Prehodna metoda (ISO 16823:2025)

General Information

• Status: Published
• Public Enquiry End Date: 30-Mar-2024
• Publication Date: 13-May-2025
• ICS: 19.100 - Non-destructive testing
• Technical Committee: PKG - Testing of metallic materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Mar-2025
• Due Date: 17-May-2025
• Completion Date: 14-May-2025
• Ref Project: EN ISO 16823:2025 - Non-destructive testing - Ultrasonic testing - Through-transmission technique (ISO 16823:2025)

Relations

• Revises: SIST EN ISO 16823:2014 - Non-destructive testing - Ultrasonic testing - Transmission technique (ISO 16823:2012)
• Effective Date: 22-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2025
Neporušitvene preiskave - Ultrazvočne preiskave - Prehodna metoda (ISO
16823:2025)
Non-destructive testing - Ultrasonic testing - Through-transmission technique (ISO
16823:2025)
Zerstörungsfreie Prüfung - Ultraschallprüfung - Durchschallungstechnik (ISO
16823:2025)
Essais non destructifs - Contrôle par ultrasons - Technique par transmission (ISO
16823:2025)
Ta slovenski standard je istoveten z: EN ISO 16823:2025
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 16823
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2025
EUROPÄISCHE NORM
ICS 19.100 Supersedes EN ISO 16823:2014
English Version
Non-destructive testing - Ultrasonic testing - Through-
transmission technique (ISO 16823:2025)
Essais non destructifs - Contrôle par ultrasons - Zerstörungsfreie Prüfung - Ultraschallprüfung -
Technique par transmission (ISO 16823:2025) Durchschallungstechnik (ISO 16823:2025)
This European Standard was approved by CEN on 17 May 2024.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16823:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 16823:2025) has been prepared by Technical Committee ISO/TC 135 "Non-
destructive testing" in collaboration with Technical Committee CEN/TC 138 “Non-destructive testing”
the secretariat of which is held by AFNOR.
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 July 2025, and conflicting national standards shall be
withdrawn at the latest by July 2025.
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 16823:2014.
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 16823:2025 has been approved by CEN as EN ISO 16823:2025 without any modification.

International
Standard
ISO 16823
Second edition
Non-destructive testing —
2025-01
Ultrasonic testing — Through-
transmission technique
Essais non destructifs — Contrôle par ultrasons — Technique par
transmission
Reference number
ISO 16823:2025(en) © ISO 2025
ISO 16823:2025(en)
© ISO 2025
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.org
Published in Switzerland
ii
ISO 16823:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 NDT personnel . 2
5 Test equipment . 2
5.1 Instrument .2
5.2 Probes .2
5.2.1 General .2
5.2.2 Probe selection.2
5.2.3 Frequency and dimensions of transducer .2
5.2.4 Dead zone .3
5.2.5 Damping .3
5.2.6 Focusing probes .3
5.3 Coupling media .3
5.4 Standard blocks .3
5.5 Reference blocks .4
5.6 Specific test blocks .4
6 Principles of testing . 4
6.1 Basic techniques and setup .4
6.2 Capability of detection of discontinuities .6
6.3 Requirements for geometry and access .6
6.4 Effects of variations in coupling, angulation and alignment of probes .6
7 Test technique . 7
7.1 General .7
7.2 Sensitivity setting .7
7.3 Scanning .7
7.4 Evaluation of discontinuities .7
7.5 Determination of the attenuation coefficient .7
7.5.1 General .7
7.5.2 Comparative technique using a reference block .8
7.5.3 Technique using the test object only .9
Bibliography .12

iii
ISO 16823:2025(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all suc
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