SIST EN ISO 15614-2:2025

SLOVENSKI STANDARD
01-november-2025
Nadomešča:
SIST EN ISO 15614-2:2005
SIST EN ISO 15614-2:2005/AC:2009
Popis in kvalifikacija varilnih postopkov za kovinske materiale - Preskus varilnega
postopka - 2. del: Obločno varjenje aluminija in njegovih zlitin (ISO 15614-2:2025)
Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 2: Arc welding of aluminium and its alloys (ISO 15614-2:2025)
Anforderung und Qualifizierung von Schweißverfahren für metallische Werkstoffe -
Schweißverfahrensprüfung - Teil 2: Lichtbogenschweißen von Aluminium und seinen
Legierungen (ISO 15614-2:2025)
Descriptif et qualification d'un mode opératoire de soudage pour les matériaux
métalliques - Épreuve de qualification d'un mode opératoire de soudage - Partie 2:
Soudage à l'arc de l'aluminium et de ses alliages (ISO 15614-2:2025)
Ta slovenski standard je istoveten z: EN ISO 15614-2:2025
ICS:
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 15614-2
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2025
EUROPÄISCHE NORM
ICS 25.160.10 Supersedes EN ISO 15614-2:2005, EN ISO 15614-
2:2005/AC:2009
English Version
Specification and qualification of welding procedures for
metallic materials - Welding procedure test - Part 2: Arc
welding of aluminium and its alloys (ISO 15614-2:2025)
Descriptif et qualification d'un mode opératoire de Anforderung und Qualifizierung von Schweißverfahren
soudage pour les matériaux métalliques - Épreuve de für metallische Werkstoffe -
qualification d'un mode opératoire de soudage - Partie Schweißverfahrensprüfung - Teil 2:
2: Soudage à l'arc de l'aluminium et de ses alliages (ISO Lichtbogenschweißen von Aluminium und seinen
15614-2:2025) Legierungen (ISO 15614-2:2025)
This European Standard was approved by CEN on 8 August 2025.

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 15614-2:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU (PED) aimed to be covered . 4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/29/EU (SPVD) aimed to be covered . 8

European foreword
This document (EN ISO 15614-2:2025) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” 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 March 2026, and conflicting national standards shall
be withdrawn at the latest by March 2026.
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 15614-2:2005, EN ISO 15614-2:2005/AC:2009.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA or ZB, which is an integral part of
this document.
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 15614-2:2025 has been approved by CEN as EN ISO 15614-2:2025 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU (PED) aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/601 to
provide one voluntary means of conforming to Essential Safety Requirements of the New Approach
Pressure Equipment Directive 2014/68/EU.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 and application of the
edition of the normatively referenced standards as given in Table ZA.2 confers, within the limits of the
scope of this standard, a presumption of conformity with the corresponding Essential Safety
Requirements of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I of the Directive
2014/68/EU (PED)
Essential Requirements of
Clauses of this EN Remarks/Notes
Directive 2014/68/EU (PED)
Permanent joining. For pressure
resistant components of
pressure equipment in the
3.1.2, paragraphs 3, 4 and 5 Clauses 4, 5, 6, 7, 8, 9
categories II, III and IV the
examiner/examining body is a
competent third party.
Table ZA.2 — Normative references from Clause 2 of this document and their corresponding
European publications
Column 1 Column 2 International Column 3 Column 4
Reference in Standard Edition Title Corresponding
Clause 2 European Standard
Edition
ISO 2107 ISO 2107:2007 Aluminium and aluminium None
alloys — Wrought products For applicable standard
— Temper designations edition see Column 2
ISO 3452-1 ISO 3452-1:2021 Non-destructive testing — EN ISO 3452-1:2021
Penetrant testing — Part 1:
General principles
ISO 4136 ISO 4136:2022 Destructive tests on welds in EN ISO 4136:2022
metallic materials —
Transverse tensile test
ISO 5173 ISO 5173:2023 Destructive tests on welds in EN ISO 5173:2023
metallic materials — Bend
tests
ISO 6520-1 ISO 6520-1:2007 Welding and allied EN ISO 6520-1:2007
Column 1 Column 2 International Column 3 Column 4
Reference in Standard Edition Title Corresponding
Clause 2 European Standard
Edition
processes — Classification
of geometric imperfections
in metallic materials —
Part 1: Fusion welding
ISO 6947 ISO 6947:2019 Welding and allied EN ISO 6947:2019
processes — Welding
positions
ISO 9017 ISO 9017:2017 Destructive tests on welds in EN ISO 9017:2018
metallic materials —
Fracture test
ISO 10042 ISO 10042:2018 Welding — Arc-welded EN ISO 10042:2018
joints in aluminium and its
alloys — Quality levels for
imperfections
ISO 10863 ISO 10863:2020 Non-destructive testing of EN ISO 10863:2020
welds — Ultrasonic testing
— Use of time-of-flight
diffraction technique
(TOFD)
ISO 13588 ISO 13588:2019 Non-destructive testing of EN ISO 13588:2019
welds — Ultrasonic testing
— Use of automated phased
array technology
ISO 14175 ISO 14175:2008 Welding consumables — EN ISO 14175:2008
Gases and gas mixtures for
fusion welding and allied
processes
ISO 15607 ISO 15607:2019 Specification and EN ISO 15607:2019
qualification of welding
procedures for metallic
materials — General rules
ISO 15609-1 ISO 15609-1:2019 Specification and EN ISO 15609-1:2019
qualification of welding
procedures for metallic
materials — Welding
procedure specification —
Part 1: Arc welding
ISO 15613 ISO 15613:2004 Specification and EN ISO 15613:2004
qualification of welding
procedures for metallic
materials — Qualification
based on pre-production
welding test
Column 1 Column 2 International Column 3 Column 4
Reference in Standard Edition Title Corresponding
Clause 2 European Standard
Edition
ISO 17636-1 ISO 17636-1:2022 Non-destructive testing of EN ISO 17636-1:2022
welds — Radiographic
testing — Part 1: X- and
gamma-ray techniques with
film
ISO 17636-2 ISO 17636-2:2022 Non-destructive testing of EN ISO 17636-2:2022
Corrected version 2023–02 welds — Radiographic
testing — Part 2: X- and
gamma-ray techniques with
digital detectors
ISO 17637 ISO 17637:2016 Non-destructive testing of EN ISO 17637:2016
welds — Visual testing of
fusion-welded joints
ISO 17639 ISO 17639:2022 Destructive tests on welds in EN ISO 17639:2022
metallic materials —
Macroscopic and
microscopic examination of
welds
ISO 17640 ISO 17640:2018 Non-destructive testing of EN ISO 17640:2018
welds — Ultrasonic testing
— Techniques, testing
levels, and assessment
ISO 18273 ISO 18273:2015 Welding consumables — EN ISO 18273:2015
Wire electrodes, wires and
rods for welding of
aluminium and aluminium
alloys — Classification
ISO 18491 ISO/DIS 18491: Welding and allied None
processes — Measurement For applicable standard
of arc energies edition see Column 2
ISO/TR 25901- ISO/TR 25901-1:2016 Welding and allied None
1 processes — Vocabulary — For applicable standard
Part 1: General terms edition see Column 2
ISO 25901-2 ISO 25901-2:2022 Welding and allied EN ISO 25901-2:2023
processes — Vocabulary —
Part 2: Health and safety
ISO/TR 25901- ISO/TR 25901-4:2016 Welding and allied None
4 processes — Vocabulary — For applicable standard
Part 4: Arc welding edition see Column 2
The documents listed in the Column 1 of Table ZA.2, in whole or in part, are normatively referenced in
this document, i.e. are indispensable for its application. The achievement of the presumption of
conformity is subject to the application of the edition of Standards as listed in Column 4 or, if no
European Standard Edition exists, the International Standard Edition given in Column 2 of Table ZA.2.
WARNING 1 Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
Annex ZB
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/29/EU (SPVD) aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/602 to
provide one voluntary means of conforming to Essential Safety Requirements of the New Approach
Simple pressure vessels Directive 2014/29/EU.
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZB.1 and application of the
edition of the normatively referenced standards as given in Table ZA.2 confers, within the limits of the
scope of this standard, a presumption of conformity with the corresponding Essential Safety
Requirements of that Directive and associated EFTA regulations.
Table ZB.1 — Correspondence between this European Standard and Annex I of the Directive
2014/29/EU (SPVD)
Essential Requirements of
Clauses of this EN Remarks/Notes
Directive 2014/29/EU (SPVD)
Welds on pressurized parts
3.2, paragraph 2 Clauses 4, 5, 6, 7, 8, 9
The examiner/examining body is
a notified body.
The documents listed in the Column 1 of Table ZA.2, in whole or in part, are normatively referenced in
this document, i.e. are indispensable for its application. The achievement of the presumption of
conformity is subject to the application of the edition of Standards as listed in Column 4 or, if no
European Standard Edition exists, the International Standard Edition given in Column 2 of Table ZA.2.
WARNING 1 Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 Other Union legislation may be applicable to the products falling within the scope of
this standard.
International
Standard
ISO 15614-2
Second edition
Specification and qualification
2025-08
of welding procedures for
metallic materials — Welding
procedure test —
Part 2:
Arc welding of aluminium and
its alloys
Descriptif et qualification d'un mode opératoire de soudage pour
les matériaux métalliques — Épreuve de qualification d'un mode
opératoire de soudage —
Partie 2: Soudage à l'arc de l'aluminium et de ses alliages
Reference number
ISO 15614-2:2025(en) © ISO 2025

ISO 15614-2:2025(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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 15614-2:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Preliminary welding procedure specification . 3
5 Welding procedure test . 3
6 Test piece . 3
6.1 General .3
6.2 Shape and dimensions of test pieces .3
6.2.1 General .3
6.2.2 Butt joint in plate with full penetration .3
6.2.3 Butt joint in pipe with full penetration .4
6.2.4 T-joint . . .5
6.2.5 Branch connection and fillet weld on pipe .5
6.3 Welding of test pieces .6
7 Examination and testing . 6
7.1 Extent of testing .6
7.2 Non-destructive testing .7
7.3 Location of destructive test specimens .7
7.4 Destructive testing .11
7.4.1 General .11
7.4.2 Transverse tensile test .11
7.4.3 Bend test . 12
7.4.4 Fracture test . 13
7.4.5 Macroscopic or microscopic examination . 13
7.5 Acceptance levels . 13
7.6 Re-testing .14
7.6.1 General .14
7.6.2 Related to NDT .14
7.6.3 Related to destructive testing .14
8 Range of qualification . 14
8.1 General .14
8.2 Related to the manufacturer .14
8.3 Related to the parent material . 15
8.3.1 Parent material grouping . 15
8.3.2 Parent material thickness and pipe diameter .16
8.3.3 Angle of branch connection .18
8.4 Common to all welding procedures .18
8.4.1 Welding process .18
8.4.2 Welding positions .18
8.4.3 Type of joint .18
8.4.4 Filler metal . 20
8.4.5 Type of current . . 20
8.4.6 Arc energy or heat input . 20
8.4.7 Preheat temperature . 20
8.4.8 Interpass temperature . 20
8.4.9 Post-weld heat treatment or ageing . 20
8.5 Specific to processes. 20
8.5.1 Process 131 . 20
8.5.2 Processes 141 and 142.21
8.5.3 Process 15 .21

iii
ISO 15614-2:2025(en)
9 Welding procedure qualification record (WPQR).21
Annex A (informative) Example welding procedure qualification record (WPQR) form .22
Bibliography .26

iv
ISO 15614-2:2025(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 such patent rights.
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 44, Welding and allied processes, Subcommittee
SC 10, Quality management in the field of welding, 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 15614-2:2005), which has been technically
revised. It also incorporates the Technical Corrigenda ISO 15614-2:2005/Cor. 1:2005 and ISO 15614-2:2005/
Cor. 2:2009.
The main changes are as follows:
— aligned with ISO 15614-1 as far as practicable;
— text from Clause 1 moved to the Introduction;
— process 142 added (autogenous TIG);
— references updated;
— Clauses 5, 6, 7 and 8 and associated tables and figures revised and/or updated;
— NDT and mechanical testing standards references updated.
A list of all parts in the ISO 15614 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. Official interpretations of ISO/TC 44 documents, where they exist, are
available from this page: https://committee.iso.org/sites/tc44/home/interpretation.html.

v
ISO 15614-2:2025(en)
Introduction
Qualification of welding procedures serves to demonstrate that production operations fully comply with the
agreed welding procedure, including preliminary and subsequent treatment.
Before a particular welding procedure is used in a production operation, the manufacturer should determine
and document the suitability of the welding procedure specification (WPS) to produce a weld of the required
quality.
In this document, the term “welding procedure specification” comprises all the activities which influence
the welding result, such as preparation, welding parameters, post treatment and reworking.
All new welding procedure tests are intended to be carried out in accordance with this document from the
date of its issue.
Specification and qualification of welding procedures that were made in accordance with previous editions
of this document can be used for any application for which the current edition is specified. In this case, the
ranges of qualification of previous editions remain applicable.
It is also possible to create a new WPQR range of qualification in accordance with this edition based on the
existing qualified WPQR, provided the technical intent of the testing requirements of this document has
been satisfied. Where additional tests are to be carried out to make the qualification technically equivalent,
only the additional tests on a test piece need to be performed.

vi
International Standard ISO 15614-2:2025(en)
Specification and qualification of welding procedures for
metallic materials — Welding procedure test —
Part 2:
Arc welding of aluminium and its alloys
1 Scope
This document specifies how a preliminary welding procedure specification (pWPS) is qualified by welding
procedure tests.
This document applies to production welding, repair welding and build-up welding.
This document defines the conditions for the execution of welding procedure tests and the range of
qualification for welding procedures for all practical welding operations within the qualification of this
document.
This document applies to the arc welding of wrought and cast aluminium and its alloys. In this document the
term aluminium stands for aluminium and for aluminium alloys.
This document does not apply to finishing welding of aluminium castings, which is addressed in ISO 15614-4.
Arc welding of aluminium is covered by the following welding processes in accordance with ISO 4063:2023:
131 — MIG welding with solid wire electrode;
141 — TIG welding with solid filler material (wire/rod);
142 — Autogenous TIG welding;
15 — plasma arc welding.
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 2107, Aluminium and aluminium alloys — Wrought products — Temper designations
ISO 3452-1, Non-destructive testing — Penetrant testing — Part 1: General principles
ISO 4136, Destructive tests on welds in metallic materials — Transverse tensile test
ISO 5173, Destructive tests on welds in metallic materials — Bend tests
ISO 6520-1, Welding and allied processes — Classification of geometric imperfections in metallic materials —
Part 1: Fusion welding
ISO 6947, Welding and allied processes — Welding positions
ISO 9017, Destructive tests on welds in metallic materials — Fracture test
ISO 10042:2018, Welding — Arc-welded joints in aluminium and its alloys — Quality levels for imperfections

ISO 15614-2:2025(en)
ISO 10863, Non-destructive testing of welds — Ultrasonic testing — Use of time-of-flight diffraction
technique (TOFD)
ISO 13588, Non-destructive testing of welds — Ultrasonic testing — Use of automated phased array technology
ISO 14175, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules
ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure
specification — Part 1: Arc welding
ISO 15613, Specification and qualification of welding procedures for metallic materials — Qualification based
on pre-production welding test
ISO 17636-1, Non-destructive testing of welds — Radiographic testing — Part 1: X- and gamma-ray techniques
with film
ISO 17636-2, Non-destructive testing of welds — Radiographic testing — Part 2: X- and gamma-ray techniques
with digital detectors
ISO 17637, Non-destructive testing of welds — Visual testing of fusion-welded joints
ISO 17639, Destructive tests on welds in metallic materials — Macroscopic and microscopic examination of welds
ISO 17640, Non-destructive testing of welds — Ultrasonic testing — Techniques, testing levels, and assessment
ISO 25901 (all parts), Welding and allied processes — Vocabulary
ISO 18273, Welding consumables — Wire electrodes, wires and rods for welding of aluminium and aluminium
alloys — Classification
1)
ISO 18491 , Welding and allied processes — Measurement of arc energies
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 15607, the ISO 25901 series and
the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
finishing welding
welding carried out during production of castings in order to remove defects and core openings to ensure
the agreed quality
Note 1 to entry: Finishing welding is not included in the scope of this document, see Clause 1 and ISO 15614-4.
3.2
examiner
person who has been appointed to verify conformity to the applicable standard
Note 1 to entry: In certain cases, an external independent examiner can be required.
1) Under preparation. Stage at the time of publication: ISO/DIS 18491:2025

ISO 15614-2:2025(en)
3.3
examining body
organization appointed to verify conformity to the applicable standard
Note 1 to entry: In certain cases, an external independent examining body can be required.
4 Preliminary welding procedure specification
The pWPS shall be prepared in accordance with ISO 15609-1. It shall specify the tolerance for all the relevant
parameters.
NOTE Guidance on welding of aluminium is given in ISO/TR 17671-1 and ISO/TR 17671-4.
5 Welding procedure test
The welding and testing of test pieces shall be in accordance with Clauses 6 and 7.
The welder or welding operator who undertakes the welding procedure test satisfactorily in accordance
with this document is qualified according to the national or international standard being applied, provided
that the relevant testing requirements of that standard are met.
6 Test piece
6.1 General
The welded joint to which the welding procedure will relate in production shall be represented by making a
standardized test piece or pieces, as specified in 6.2. Where the production or joint geometry requirements
do not represent the standardized test pieces as shown in this document, ISO 15613 shall be used.
6.2 Shape and dimensions of test pieces
6.2.1 General
The length or number of test pieces shall be sufficient to allow all required tests to be carried out.
When extra testing and/or re-testing specimens are required then additional test pieces or longer test pieces
shall be prepared in accordance with 7.6.
For all test pieces except branch connections (see Figure 4) and T-joints (T-butt weld or fillet weld; see
Figure 3), the material thickness, t, and the diameter, D, shall be the same for both plates and pipes on the
required length of the test piece to be welded. If required by the application standard, the direction of
working, for example for extrusion, shall be marked on the test piece.
The material thickness and/or pipe outside diameter of the test pieces shall be selected in accordance with
8.3.2.1 to 8.3.2.4.
The shape and minimum dimensions of the test piece shall be as given in 6.2.2 to 6.2.5.
6.2.2 Butt joint in plate with full penetration
The test piece shall be prepared in accordance with Figure 1.

ISO 15614-2:2025(en)
Key
1 joint preparation and fit-up as detailed in the pWPS
a minimum value 150 mm (transverse bend test specimens can require a larger a, see 7.4)
b minimum value 300 mm
t material thickness
Figure 1 — Test piece for a butt joint in plate with full penetration
6.2.3 Butt joint in pipe with full penetration
The test piece shall be prepared in accordance with Figure 2.
NOTE The word “pipe” alone or in combination is used to mean “pipe”, “tube” or “hollow section”.
Key
1 joint preparation and fit-up as detailed in the pWPS
a minimum value 150 mm (transverse bend test specimens can require a larger a, see 7.4)
D outside pipe diameter
t material thickness
Figure 2 — Test piece for a butt joint in pipe with full penetration

ISO 15614-2:2025(en)
6.2.4 T-joint
The test piece shall be prepared in accordance with Figure 3.
This test piece applies to full penetration butt welds or fillet welds.
Key
1 weld one side or both sides and fit-up as detailed in the pWPS
a minimum value 150 mm
b minimum value 300 mm
t , t material thickness
1 2
Figure 3 — Test piece for a T-joint
6.2.5 Branch connection and fillet weld on pipe
The test piece shall be prepared in accordance with Figure 4. The branch angle α is the minimum to be used
in production.
This test piece applies to full penetration welds (set-on, set-in or set-through joint) and for T-joints.

ISO 15614-2:2025(en)
Key
1 joint preparation and fit-up as detailed in the pWPS
a minimum value 150 mm
D outside diameter of the main pipe
D outside diameter of the branch pipe
t main pipe material thickness
t branch pipe material thickness
α branch angle
Figure 4 — Test piece for a branch connection
6.3 Welding of test pieces
Preparation and welding of test pieces shall be carried out in accordance with the pWPS and under the
conditions of welding in production which they shall represent. Welding positions and limitations for the
angle of slope and rotation of the test piece shall be in accordance with ISO 6947. If tack welds are to be fused
into the production joint, they shall be included in the test piece.
Welding and testing of the test pieces shall be witnessed by an examiner or examining body.
7 Examination and testing
7.1 Extent of testing
Non-destructive testing (NDT) and destructive testing shall be carried out in accordance with Table 1.
The discard (see Figure 5 and Figure 7) shall not be considered for NDT. Any post-weld heat treatment
(PWHT) that is specified shall be completed prior to non-destructive testing. Consequently, an application
standard can specify additional tests, e.g.:
— longitudinal weld tensile test;
— weld metal bend test or special weld metal bend test to measure elongation;
— tensile test for the determination of the 0,2 % proof strength and/or elongation;
— chemical analysis;
ISO 15614-2:2025(en)
— cruciform test.
Table 1 — Examination and testing of the test pieces
Test piece Type of test Extent of testing Footnote
Visual testing (ISO 17637) 100 % —
Radiographic testing (ISO 17636-1, or
ISO 17636-2)
or
ultrasonic testing (ISO 17640)
or
100 % —
phased array ultrasonic testing
(ISO 13588)
or
Butt joint with full penetration
time of flight ultrasonic testing
Figures 1 and 2 (ISO 10863)
Penetrant testing (ISO 3452-1) 100 % —
Transverse tensile test (ISO 4136) Two test specimens —
a
Transverse bend test (ISO 5173) Two root and
Two face test specimens
or
fracture test (ISO 9017) for cast ma-
terials or wrought–cast combinations
Macroscopic examination (ISO 17639) One test specimen —
b
Microscopic examination (ISO 17639) One test specimen
c
T-joint with full penetration Visual testing (ISO 17637) 100 % —
Figure 3
Penetrant testing (ISO 3452-1) 100 % —
c
Branch connection with full pene-
d
Macroscopic examination (ISO 17639) Two test specimens
tration
b
Microscopic examination (ISO 17639) One test specimen
Figure 4
Visual testing (ISO 17637) 100 % —
c
Penetrant testing (ISO 3452-1) 100 % —
Fillet welds
Figure 3 and Figure 4
Macroscopic examination (ISO 17639) Two test specimens —
b
Microscopic examination (ISO 17639) One test specimen
a
Bend tests in accordance with 7.4.3.
b
Only for material group 23 and all casting alloys.
c
Tests as detailed do not provide information on the mechanical properties of the joint. Where these properties are relevant
to the application, an additional qualification
...