SIST EN ISO 25239-3:2020

SLOVENSKI STANDARD
01-november-2020
Nadomešča:
SIST EN ISO 25239-3:2012
Varjenje z gnetenjem - Aluminij - 3. del: Kvalifikacija osebja (ISO 25239-3:2020)
Friction stir welding - Aluminium - Part 3: Qualification of welding operators (ISO 25239-
3:2020)
Rührreibschweißen - Aluminium - Teil 3: Qualifizierung der Bediener (ISO 25239-3:2020)
Soudage par friction-malaxage - Aluminium - Partie 3: Qualification des opérateurs
soudeurs (ISO 25239-3:2020)
Ta slovenski standard je istoveten z: EN ISO 25239-3:2020
ICS:
03.100.30 Vodenje ljudi Management of human
resources
25.160.10 Varilni postopki in varjenje Welding processes
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 25239-3
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2020
EUROPÄISCHE NORM
ICS 25.160.01; 25.160.10 Supersedes EN ISO 25239-3:2011
English Version
Friction stir welding - Aluminium - Part 3: Qualification of
welding operators (ISO 25239-3:2020)
Soudage par friction-malaxage - Aluminium - Partie 3: Rührreibschweißen - Aluminium - Teil 3:
Qualification des opérateurs soudeurs (ISO 25239- Qualifizierung der Bediener (ISO 25239-3:2020)
3:2020)
This European Standard was approved by CEN on 12 July 2020.

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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25239-3:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 25239-3:2020) has been prepared by Technical Committee ISO/TC IIW
"International Institute of Welding" in collaboration with Technical Committee CEN/TC 121 “Welding
and allied processes” the secretariat of which is held by DIN.
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 January 2021, and conflicting national standards shall
be withdrawn at the latest by January 2021.
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 25239-3:2011.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 25239-3:2020 has been approved by CEN as EN ISO 25239-3:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 25239-3
Second edition
2020-06
Friction stir welding — Aluminium —
Part 3:
Qualification of welding operators
Soudage par friction-malaxage — Aluminium —
Partie 3: Qualification des opérateurs soudeurs
Reference number
ISO 25239-3:2020(E)
©
ISO 2020
ISO 25239-3:2020(E)
© ISO 2020
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
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 25239-3:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 1
4.1 Welding operator qualification . 1
4.2 Essential variables and ranges of qualification . 2
4.2.1 General. 2
4.2.2 Friction stir welding methods . 2
4.2.3 Welding equipment . 2
4.2.4 Parent materials . 2
4.2.5 Weld joint geometry . 2
4.2.6 Quality acceptance levels . . 2
4.3 Qualification methods . 3
4.3.1 Qualification based on standard welding test . 3
4.3.2 Qualification based on welding procedure test . 3
4.3.3 Qualification based on pre-production welding test . 3
4.3.4 Qualification based on production sample welding test . 3
4.4 Test welds . 4
4.4.1 General. 4
4.4.2 Testing and acceptance levels of test welds . 4
4.4.3 Re-testing . 4
4.5 Test report . 5
5 Certificate . 5
5.1 General . 5
5.2 Period of validity . 5
5.2.1 Initial qualification . 5
5.2.2 Confirmation of the validity . 5
5.2.3 Prolongation of qualification . 5
Annex A (normative) Knowledge of the welding unit and its operation . 7
Annex B (normative) Knowledge of welding technology . 9
Annex C (informative) Example of a qualification test certificate for FSW welding operators .11
Bibliography .13
ISO 25239-3:2020(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 IIW, International Institute of Welding, Commission III, Resistance
Welding, Solid State Welding and Allied Joining Process, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 121, Welding and allied processes, in accordance
with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 25239-3:2011), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the qualification of the welding operator has been changed for reference to the acceptance levels of
ISO 25239-5;
— the definitions for testing and acceptance levels of test welds have been updated;
— NDT is no longer accepted as an alternative to bend test to qualify welding operator;
— the period of welding operator qualification has been extended to three years with possible
prolongation for another three years;
— Annex A has been reworded to focus on the knowledge of the welding unit and its operation;
— Annex B has been reworded to focus on the knowledge of the welding technology;
— Annex C has been modified to fit to the extended validity of the qualification.
A list of all parts in the ISO 25239 series can be found on the ISO website.
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 2020 – All rights reserved

ISO 25239-3:2020(E)
Introduction
Welding processes are widely used in the fabrication of engineered structures. During the second half
of the twentieth century, fusion welding processes, wherein fusion is obtained by the melting of parent
material and usually a filler metal, dominated the welding of large structures. In 1991, Wayne Thomas
at TWI invented friction stir welding (FSW), which is carried out entirely in the solid phase (no melting).
The increasing use of FSW has created the need for this document in order to ensure that welding is
carried out in the most effective way and that appropriate control is exercised over all aspects of the
operation. This document focuses on the FSW of aluminium because, at the time of publication, the
majority of commercial applications for FSW involved aluminium. Examples include railway carriages,
consumer products, food processing equipment, aerospace structures, and marine vessels.
INTERNATIONAL STANDARD ISO 25239-3:2020(E)
Friction stir welding — Aluminium —
Part 3:
Qualification of welding operators
1 Scope
This document specifies requirements for the qualification of welding operators for friction stir welding
(FSW) of aluminium. In this document, the term “aluminium” refers to aluminium and its alloys.
This document does not apply to “operators” as defined in ISO 25239-1.
This document does not apply to friction stir spot welding which is covered by the ISO 18785 series.
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
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 25239-1, Friction stir welding — Aluminium — Part 1: Vocabulary
ISO 25239-4:2020, Friction stir welding — Aluminium — Part 4: Specification and qualification of welding
procedures
ISO 25239-5:2020, Friction stir welding — Aluminium — Part 5: Quality and inspection requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 25239-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
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