prEN ISO 16823

SLOVENSKI STANDARD
01-marec-2024
Neporušitvene preiskave - Ultrazvočne preiskave - Prehodna metoda (ISO/DIS
16823:2024)
Non-destructive testing - Ultrasonic testing - Through-transmission technique (ISO/DIS
16823:2024)
Zerstörungsfreie Prüfung - Ultraschallprüfung - Durchschallungstechnik (ISO/DIS
16823:2024)
Essais non destructifs - Contrôle par ultrasons - Technique par transmission (ISO/DIS
16823:2024)
Ta slovenski standard je istoveten z: prEN ISO 16823
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 16823
ISO/TC 135/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
2024-01-23 2024-04-16
Non-destructive testing — Ultrasonic testing — Through-
transmission technique
ICS: 19.100
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 16823:2024(E)
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 SUPPORTING DOCUMENTATION. © ISO 2024

ISO/DIS 16823:2024(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 16823
ISO/TC 135/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:

Non-destructive testing — Ultrasonic testing — Through-
transmission technique
ICS: 19.100
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2024
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
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TECHNOLOGICAL, COMMERCIAL AND
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 16823:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 16823:2023(E)
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 Probe selection. 2
5.2.2 Frequency and dimensions of transducer . 2
5.2.3 Dead zone . 3
5.2.4 Damping . 3
5.2.5 Focusing probes . 3
5.3 Coupling media . 3
5.4 Calibration blocks . 3
5.5 Reference blocks . 3
5.6 Specific test blocks . 4
6 Principles of testing .4
6.1 Basic techniques and setup . 4
6.2 Capability of detection of imperfections . 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 .6
7.1 General . 6
7.2 Sensitivity setting . 6
7.3 Scanning . 7
7.4 Evaluation of imperfections. 7
7.5 Determination of the attenuation coefficient . 7
7.5.1 General . 7
7.5.2 Comparative technique using a reference block . 7
7.5.3 Technique using the test object only . 9
Bibliography .12
iii
ISO/DIS 16823:2023(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.
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 documents 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).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 135, Non-destructive testing,
Subcommittee SC 3, Ultrasonic testing.
This second edition cancels and replaces the first edition (ISO 16823:2012), which has been technically
revised.
The main changes are as follows:
— normative references have been updated;
— figures have been improved;
— the terminology has been aligned throughout the whole document.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/DIS 16823:2023(E)
Introduction
The following documents are linked:
ISO 16810, Non-destructive testing — Ultrasonic testing — General principles
ISO 16811, Non-destructive testing — Ultrasonic testing — Sensitivity and range setting
ISO 16823, Non-destructive testing — Ultrasonic testing — Transmission technique
ISO 16826, Non-destructive testing — Ultrasonic testing — Testing for discontinuities perpendicular to the
surface
ISO 16827, Non-destructive testing — Ultrasonic testing — Characterization and sizing of discontinuities
ISO 16828, Non-destructive testing — Ultrasonic testing — Time-of-flight diffraction technique as a
method for detection and sizing of discontinuities
v
DRAFT INTERNATIONAL STANDARD ISO/DIS 16823:2023(E)
Non-destructive testing — Ultrasonic testing — Through-
transmission technique
1 Scope
This document specifies the principles of ultrasonic through-transmission techniques.
Through-transmission techniques can be used for:
— detection of imperfections;
— 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, e.g.:
— where the shape, dimensions or orientation of possible imperfections are unfavourable for direct
reflection;
— of materials with high sound attenuation;
— on thin test objects.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
unda
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