prEN ISO 15614-1
(Main)Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO/DIS 15614-1:2025)
Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO/DIS 15614-1:2025)
ISO 15614-1:2017 specifies how a preliminary welding procedure specification is qualified by welding procedure tests.
ISO 15614-1:2017 applies to production welding, repair welding and build-up welding.
ISO 15614-1:2017 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.
The primary purpose of welding procedure qualification is to demonstrate that the joining process proposed for construction is capable of producing joints having the required mechanical properties for the intended application.
Two levels of welding procedure tests are given in order to permit application to a wide range of welded fabrication. They are designated by levels 1 and 2. In level 2, the extent of testing is greater and the ranges of qualification are more restrictive than in level 1.
Procedure tests carried out to level 2 automatically qualify for level 1 requirements, but not vice-versa.
When no level is specified in a contract or application standard, all the requirements of level 2 apply.
This document applies to the arc and gas welding of steels in all product forms and the arc welding of nickel and nickel alloys in all product forms.
Arc and gas welding are covered by the following processes in accordance with ISO 4063.
111 - manual metal arc welding (metal-arc welding with covered electrode);
114 - self-shielded tubular-cored arc welding;
12 - submerged arc welding;
13 - gas-shielded metal arc welding;
14 - gas-shielded arc welding with non-consumable electrode;
15 - plasma arc welding;
311 - oxy-acetylene welding.
The principles of this document may be applied to other fusion welding processes.
NOTE A former process number does not require a new qualification test according to this document.
Specification and qualification of welding procedures that were made in accordance with previous editions of this document may 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 (welding procedure qualification record) range of qualification according to 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 have to be carried out to make the qualification technically equivalent, it is only necessary to perform the additional test on a test piece.
Anforderung und Qualifizierung von Schweißverfahren für metallische Werkstoffe - Schweißverfahrensprüfung - Teil 1: Lichtbogen- und Gasschweißen von Stählen und Lichtbogenschweißen von Nickel und Nickellegierungen (ISO/DIS 15614-1:2025)
Descriptif et qualification d'un mode opératoire de soudage pour les matériaux métalliques - Épreuve de qualification d'un mode opératoire de soudage - Partie 1: Soudage à l'arc et aux gaz des aciers et soudage à l'arc du nickel et des alliages de nickel (ISO/DIS 15614-1:2025)
ISO 15614-1:2017 spécifie comment un descriptif de mode opératoire de soudage préliminaire est qualifié par des épreuves de qualification du mode opératoire de soudage.
ISO 15614-1:2017 s'applique au soudage de production, de réparation et de reconstitution.
ISO 15614-1:2017 définit les conditions d'exécution des épreuves de qualification du mode opératoire de soudage et le domaine de validité du mode opératoire de soudage pour toutes les opérations pratiques de soudage couvertes par la qualification selon le présent document.
L'objet principal de la qualification d'un mode opératoire de soudage est de démontrer que le procédé d'assemblage proposé pour la construction est capable de produire des assemblages ayant les propriétés mécaniques requises pour l'application prévue.
ISO 15614-1:2017 prévoit deux niveaux d'épreuves de qualification du mode opératoire de soudage, de façon à être applicable à une large gamme de fabrications soudées. Ils sont désignés niveau 1 et niveau 2. Dans le niveau 2, l'étendue des essais est plus vaste et le domaine de validité plus restrictif que dans le niveau 1.
Les épreuves de qualification de modes opératoires réalisées selon le niveau 2 satisfont automatiquement les exigences du niveau 1, mais pas l'inverse.
Lorsqu'aucun niveau n'est spécifié dans un contrat ou une norme d'application, l'ensemble des exigences du niveau 2 s'appliquent.
ISO 15614-1:2017 s'applique au soudage à l'arc et aux gaz d'aciers sous toutes formes, et au soudage à l'arc du nickel et des alliages de nickel sous toutes formes.
Les soudages à l'arc et aux gaz sont couverts par les procédés suivants, conformément à l'ISO 4063.
111 - soudage manuel à l'arc avec électrode enrobée;
114 - soudage à l'arc avec fil fourré autoprotecteur;
12 ? soudage à l'arc sous flux (en poudre);
13 - soudage à l'arc avec électrode fusible sous protection gazeuse;
14 - soudage à l'arc avec électrode réfractaire sous protection gazeuse;
15 - soudage plasma;
311 - soudage oxyacétylénique.
Les principes du présent document peuvent s'appliquer à d'autres procédés de soudage par fusion.
NOTE Les anciennes numérotations de procédés ne nécessitent pas une nouvelle épreuve de qualification au titre du présent document.
Un descriptif et une qualification de mode opératoire de soudage qui ont été effectués conformément aux précédentes éditions du présent document peuvent être utilisés pour toute application pour laquelle la présente édition est spécifiée. Dans ce cas, le domaine de validité des précédentes éditions reste applicable.
Il est également possible de créer un nouveau domaine de validité de PV-QMOS (procès-verbal de qualification du mode opératoire de soudage) selon la présente édition en se basant sur le PV-QMOS qualifié existant, à condition que l'intention technique des exigences d'essai du présent document ait été satisfaite. Lorsque des essais complémentaires doivent être réalisés pour rendre la qualification techniquement équivalente, il est uniquement nécessaire de réaliser l'essai complémentaire sur un assemblage de qualification.
Popis in kvalifikacija varilnih postopkov za kovinske materiale - Preskus varilnega postopka - 1. del: Obločno in plamensko varjenje jekel in obločno varjenje niklja in nikljevih zlitin (ISO/DIS 15614-1:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Popis in kvalifikacija varilnih postopkov za kovinske materiale - Preskus varilnega
postopka - 1. del: Obločno in plamensko varjenje jekel in obločno varjenje niklja in
nikljevih zlitin (ISO/DIS 15614-1:2025)
Specification and qualification of welding procedures for metallic materials - Welding
procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and
nickel alloys (ISO/DIS 15614-1:2025)
Anforderung und Qualifizierung von Schweißverfahren für metallische Werkstoffe -
Schweißverfahrensprüfung - Teil 1: Lichtbogen- und Gasschweißen von Stählen und
Lichtbogenschweißen von Nickel und Nickellegierungen (ISO/DIS 15614-1:2025)
Descriptif et qualification d'un mode opératoire de soudage pour les matériaux
métalliques - Épreuve de qualification d'un mode opératoire de soudage - Partie 1:
Soudage à l'arc et aux gaz des aciers et soudage à l'arc du nickel et des alliages de
nickel (ISO/DIS 15614-1:2025)
Ta slovenski standard je istoveten z: prEN ISO 15614-1
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
77.080.20 Jekla Steels
77.120.40 Nikelj, krom in njune zlitine Nickel, chromium and their
alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 15614-1
ISO/TC 44/SC 10
Specification and qualification of
Secretariat: DIN
welding procedures for metallic
Voting begins on:
materials — Welding procedure
2025-09-22
test —
Voting terminates on:
2025-12-15
Part 1:
Arc and gas welding of steels and
arc welding of nickel and nickel
alloys
Descriptif et qualification d'un mode opératoire de soudage pour
les matériaux métalliques — Épreuve de qualification d'un mode
opératoire de soudage —
Partie 1: Soudage à l'arc et aux gaz des aciers et soudage à l'arc
du nickel et des alliages de nickel
ICS: 25.160.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
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BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
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Reference number
ISO/DIS 15614-1:2025(en)
DRAFT
ISO/DIS 15614-1:2025(en)
International
Standard
ISO/DIS 15614-1
ISO/TC 44/SC 10
Specification and qualification
Secretariat: DIN
of welding procedures for
Voting begins on:
metallic materials — Welding
procedure test —
Voting terminates on:
Part 1:
Arc and gas welding of steels and arc
welding of nickel and nickel alloys
Descriptif et qualification d'un mode opératoire de soudage pour
les matériaux métalliques — Épreuve de qualification d'un mode
opératoire de soudage —
Partie 1: Soudage à l'arc et aux gaz des aciers et soudage à l'arc
du nickel et des alliages de nickel
ICS: 25.160.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 15614-1:2025(en)
ii
ISO/DIS 15614-1:2025(en)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Preliminary welding procedure specification (pWPS) . 3
5 Welding procedure test . 3
6 Test piece . 4
6.1 General .4
6.1.1 Level 1 .4
6.1.2 Level 2 .4
6.2 Shape and dimensions of test pieces .4
6.2.1 General .4
6.2.2 Butt joint in plate with full penetration .4
6.2.3 Butt joint in pipe with full penetration .4
6.2.4 T-joint . . .4
6.2.5 Branch connection .4
6.3 Welding of test pieces .5
7 Examination and testing . 7
7.1 Type and extent of testing .7
7.1.1 Level 1 .8
7.1.2 Level 2 .8
7.2 Location and taking of test specimens .9
7.3 Non-destructive testing, NDT . 12
7.4 Destructive testing . 13
7.4.1 Transverse tensile test . 13
7.4.2 Bend test . 13
7.4.3 Macroscopic examination . .14
7.4.4 Impact testing .14
7.4.5 Hardness testing.14
7.5 Acceptance levels . 15
7.6 Re-testing .16
7.6.1 General .16
7.6.2 Related to NDT .16
7.6.3 Related to destructive testing .16
8 Range of qualification . 17
8.1 General .17
8.2 Related to the manufacturer .17
8.3 Related to the parent material .17
8.3.1 Parent material grouping .17
8.3.2 Material thickness .19
8.3.3 Diameter of pipes and branch connections .21
8.3.4 Angle of branch connection .21
8.4 Common to all welding procedures .21
8.4.1 Welding processes.21
8.4.2 Welding positions . 22
8.4.3 Type of joint/weld . 22
8.4.4 Filler material, manufacturer/trade name, designation . 23
8.4.5 Filler material size .24
8.4.6 Type of current . .24
8.4.7 Arc energy or heat input .24
8.4.8 Preheat temperature . 25
iii
ISO/DIS 15614-1:2025(en)
8.4.9 Interpass temperature . 25
8.4.10 Post-heating for hydrogen release . 25
8.4.11 Heat-treatment . 26
8.5 Specific to processes. 26
8.5.1 Submerged arc welding (process 12). 26
8.5.2 Gas-shielded metal arc welding (process 13) .27
8.5.3 Gas-shielded arc welding with non-consumable electrode (process 14) . 28
8.5.4 Plasma arc welding (process 15) . 28
8.5.5 Oxy-acetylene welding (process 311) . 28
8.5.6 Backing gas . 28
9 Welding procedure qualification record (WPQR).29
9.1 General . 29
9.2 Level 1 . 29
9.3 Level 2 . 29
Annex A (normative) Filler material, designation .30
Annex B (informative) Welding procedure qualification record form (WPQR) .32
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/68/EU (PED) aimed to be covered .36
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2014/29/EU (SPVD) aimed to be covered .39
Bibliography .40
iv
ISO/DIS 15614-1:2025(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 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).
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 third edition cancels and replaces the second edition (ISO 15614-1:2017 and ISO 15614:2017/Amd
1:2019), which has been technically revised.
The main changes are as follows:
— change of structure from two-column to single-column display of Level 1 and Level 2;
— unambiguous definition of square or rectangular hollow section under 6.2.3;
— steel group 11 added in Table 3 (permitted maximum hardness values);
— subclause 7.6 (Re-testing) restructured.
— definition of “welding under the same technical and quality control” were clarified under subclause 8.2;
— subclause 8.3.3 (Diameter of pipes and branch connections) for Level 2 were technical revised;
— degree of mechanization is no longer an essential requirement, see 8.4.1;
— welding position is no longer an essential requirement, see 8.4.2;
— reference to ISO 18491 were added under subclause 8.4.7 (Arc energy or heat input);
— limit of 150°C were added under subclause 8.4.9 (Interpass temperature);
— under Level 2, the requirements regarding submerged arc welding were revised, see 8.5.1;
— normative references and bibliography were updated.
A list of all parts in the ISO 15614 series can be found on the ISO website.
v
ISO/DIS 15614-1:2025(en)
Requests for official interpretations of any aspect of this document should be directed to the Secretariat
of ISO/TC 44/SC 10 via your national standards body. A complete listing of these bodies can be found at
www.iso.org.
vi
ISO/DIS 15614-1:2025(en)
Introduction
Two levels of welding procedure qualification tests are given to permit application to a wide range of welded
fabrication. They are designated by levels 1 and 2.
Level 1 is based on requirements of ASME Section IX and level 2 is based prior editions of ISO 15614-1.
All new welding procedure qualification tests are to be performed in accordance with this document.
Specification and qualification of welding procedures that were made in accordance with previous editions
of this document may 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 possible to create a new WPQR (welding procedure qualification record) range of qualification
according to 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 have to be carried out to make the
qualification technically equivalent, it is only necessary to perform the additional test on a test piece.
vii
DRAFT International Standard ISO/DIS 15614-1:2025(en)
Specification and qualification of welding procedures for
metallic materials — Welding procedure test —
Part 1:
Arc and gas welding of steels and arc welding of nickel and
nickel alloys
1 Scope
This document specifies how a preliminary welding procedure specification is qualified by welding
procedure tests according to the principles given in ISO 15607.
This document applies to production welding, repair welding and build-up welding.
This document defines the conditions for the execution of welding procedure qualification tests and the
range of qualification for welding procedures for all practical welding operations within the qualification of
this document.
The primary purpose of welding procedure qualification is to demonstrate that the joining process proposed
for construction is capable of producing welded joints having the required mechanical properties for the
intended application.
Two levels of welding procedure tests are given to permit application to a wide range of welded fabrications.
They are designated by levels 1 and 2. For level 2 the extent of testing is greater, and the ranges of
qualification are more restrictive than in level 1.
Welding procedure qualification tests carried out to level 2 automatically qualify for level 1 requirements,
but not vice-versa.
When no level is specified in a contract or application standard, all the requirements of level 2 apply.
This document applies to the arc and gas welding of steels in all product forms and the arc welding of nickel
and nickel alloys in all product forms.
Arc and gas welding are covered by the following processes in accordance with ISO 4063:2023.
111 — manual metal arc welding (metal-arc welding with covered electrode);
114 — self-shielded tubular-cored arc welding;
12 — submerged arc welding;
13 — gas-shielded metal arc welding;
14 — gas-shielded arc welding with non-consumable electrode;
15 — plasma arc welding;
311 — oxy-acetylene welding.
NOTE A former process number does not require a new qualification test according to this document.
ISO/DIS 15614-1:2025(en)
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 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 3452-1, Non-destructive testing — Penetrant testing — Part 1: General principles
ISO 4063:2023, Welding, brazing, soldering and cutting — Nomenclature of processes and reference numbers
ISO 4136, Destructive tests on welds in metallic materials — Transverse tensile test
ISO 5173, Destructive tests on welds in metallic materials — Bend tests
ISO 5817:2023, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) — Quality levels for imperfections
ISO 6520-1:2007, Welding and allied processes — Classification of geometric imperfections in metallic materials
— Part 1: Fusion welding
ISO 6947, Welding and allied processes — Welding positions
ISO 9015-1, Destructive tests on welds in metallic materials — Hardness testing — Part 1: Hardness test on arc
welded joints
ISO 9016, Destructive tests on welds in metallic materials — Impact tests — Test specimen location, notch
orientation and examination
ISO 13588, Non-destructive testing of welds — Ultrasonic testing — Use of automated phased array technology
ISO 14175:2008, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
ISO/DIS 15608, Welding — Guidelines for a metallic materials grouping system
ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure
specification — Part 1: Arc welding
ISO 15609-2, Specification and qualification of welding procedures for metallic materials — Welding procedure
specification — Part 2: Gas welding
ISO 15613, Specification and qualification of welding procedures for metallic materials — Qualification based
on pre-production welding test
ISO 16828, Non-destructive testing — Ultrasonic testing — Time-of-flight diffraction technique for detection
and sizing of discontinuities
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 17638, Non-destructive testing of welds — Magnetic particle testing
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/DIS 18491, Welding and allied processes — Guidelines for measurement of welding energies
ISO/TR 20172, Welding — Grouping systems for materials — European materials
ISO/DIS 15614-1:2025(en)
ISO/TR 20173, Welding — Grouping systems for materials — American materials
ISO/TR 20174, Welding — Grouping systems for materials — Japanese materials
ISO/TR 25901-1, Welding and allied processes — Vocabulary — Part 1: General terms
ISO/TR 25901-3, Welding and allied processes — Vocabulary — Part 3: Welding processes
ISO/TR 25901-4, Welding and allied processes — Vocabulary — Part 4: Arc welding
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TR 25901-1, -3 and -4 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
build-up welding
addition of weld metal to obtain or restore required dimensions
3.2
verification
confirmation, through the provision of objective evidence that specified requirements have been fulfilled
Note 1 to entry: The objective evidence needed for a verification can be the result of an inspection or of other forms of
determination such as performing alternative calculations or reviewing documents.
Note 2 to entry: The activities carried out for verification are sometimes called a qualification process.
Note 3 to entry: The word “verified” is used to designate the corresponding status.
[SOURCE: ISO 9000:2015, 3.8.12]
3.3
branch connection
a joint between a pipe or hollow section and the main pipe or a plate.
4 Preliminary welding procedure specification (pWPS)
A preliminary welding procedure specification shall be prepared in accordance with ISO 15609-1 for arc
welding or ISO 15609-2 for gas welding.
5 Welding procedure test
Test pieces shall be welded and tested in accordance with Clauses 6 and 7.
The welding procedure qualification test can be used to qualify a welding procedure and a welder or welding
operator concurrently, provided that all the requirements of the welder or welding operator qualification
standard are met.
ISO/DIS 15614-1:2025(en)
6 Test piece
6.1 General
The welded joint to which the welding procedure will relate in production shall be represented by making a
standard test piece or test pieces in accordance with 6.2.
If required by the application standard, the direction of plate rolling shall be marked on the test piece. This
is when impact tests are required to be taken in the Heat Affected Zone (HAZ) and shall be mentioned in the
impact test report.
6.1.1 Level 1
Any butt joint test qualifies all joint configurations.
6.1.2 Level 2
Where the joint requirements and/or dimension of the test piece are not covered by the standard test pieces
given 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 performed.
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 welds or fillet welds, 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.
The thickness and/or pipe outside diameter of the test pieces shall be selected in accordance with 8.3.2 to 8.3.3.
6.2.2 Butt joint in plate with full penetration
The test piece shall be prepared in accordance with Figure 1.
6.2.3 Butt joint in pipe with full penetration
The test piece shall be prepared in accordance with Figure 2.
The word “pipe”, alone or in combination, is used to mean “pipe”, “tube” or “hollow section”. This includes
square or rectangular hollow sections where the shortest side is < 50 mm. Square or rectangular hollow
sections where the shortest side is ≥ 50 mm shall be qualified as plate.
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.
6.2.5 Branch connection
6.2.5.1 General
The requirements for levels 1 and 2 are given in 6.2.5.2 and 6.2.5.3.
ISO/DIS 15614-1:2025(en)
6.2.5.2 Level 1
No specific test piece required.
6.2.5.3 Level 2
The test piece shall be prepared in accordance with Figure 4. The 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 fillet
welds. The main pipe can be a plate.
6.3 Welding of test pieces
Preparation and welding of test pieces shall be carried out in accordance with the pWPS, that 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.
The welding of the test piece shall be witnessed by the examiner or examining body.
Key
1 joint preparation and fit-up as detailed in the preliminary welding procedure specification (pWPS)
a minimum dimension 150 mm
b minimum dimension 350 mm
t material thickness
Figure 1 — Test piece for a butt joint in plate with full penetration
ISO/DIS 15614-1:2025(en)
Key
1 joint preparation and fit-up as detailed in the preliminary welding procedure specification (pWPS)
a minimum dimension 150 mm
D outside pipe diameter
t material thickness
Figure 2 — Test piece for a butt joint in pipe with full penetration
Key
1 joint preparation and fit-up as detailed in the preliminary welding procedure specification (pWPS)
a minimum dimension 150 mm
b minimum dimension 350 mm
t , t material thickness
1 2
Figure 3 — Test piece for a T-joint
ISO/DIS 15614-1:2025(en)
Key
1 joint preparation and fit-up as detailed in the preliminary welding procedure specification (pWPS)
α branch angle
a minimum dimension 150 mm
D outside diameter of main pipe when a pipe or hollow section is used
D outside diameter of branch pipe
t main pipe material thickness or plate thickness when a plate is used
t branch pipe material thickness
Figure 4 — Test piece for a branch connection
7 Examination and testing
7.1 Type and extent of testing
The type and extent of testing for levels 1 and 2 are given in 7.1.1 and 7.1.2.
NOTE Specific service, material or manufacturing conditions can require more comprehensive testing than is
specified by this document. This is to gain more information and to avoid repeating the welding procedure qualification
test at a later date to obtain additional test data. Consequently, an application standard can specify additional tests, e.g.:
— longitudinal weld tensile test;
— all weld metal bend test;
— corrosion test;
— chemical analysis;
— microscopic examination;
— delta ferrite examination;
— hardness test;
— cruciform test;
ISO/DIS 15614-1:2025(en)
— impact test;
— non-destructive testing (NDT).
7.1.1 Level 1
The type and the extent of testing shall be in accordance with the requirements of Table 1. If impact testing,
hardness testing or NDT is required by an application standard, these shall be performed and assessed in
accordance with the requirements of level 2, unless otherwise specified by the application standard.
Table 1 — Level 1: Examination and testing of the test pieces
Test piece Type of test Extent of testing Footnote
100 %
Visual testing 2 specimens
Butt joint with full penetra-
4 specimens
a
tion —
Figure 1 and Figure 2 Transverse tensile test
Transverse bend test
Visual testing 100 %
b
Fillet welds — Figure 3
Macroscopic examination 2 specimens
a
Bend tests in accordance with 7.4.2.
b
Mechanical tests required by an application standard shall be performed. If an additional test piece is needed, the dimensions
should be sufficient to allow mechanical testing. For this additional test piece, the welding parameters, parent material group,
filler material and heat treatment shall be in accordance with the same pWPS.
7.1.2 Level 2
The type and the extent of testing shall be in accordance with the requirements of Table 2. Test results shall
be subject to verification by the examiner or examining body.
ISO/DIS 15614-1:2025(en)
Table 2 — Level 2: Examination and testing of the test pieces
Test piece Type of test Extent of testing Footnote
Visual testing 100 % —
a
Radiographic or ultrasonic testing 100 %
Penetrant or magnetic particle test-
b
100 %
ing
Butt joint with full penetra-
Transverse tensile test 2 specimens —
tion —
Figure 1 and Figure 2 c
Transverse bend test 4 specimens
d
Impact test 2 sets
e
Hardness test Required
Macroscopic examination 1 specimen —
Visual testing 100 % —
T- joint with full
penetration —
Penetrant or magnetic particle test-
b
100 %
Figure 3
ing
Branch connection with full
a, g
Ultrasonic or radiographic testing 100 %
penetration —
e
Hardness test required
Figure 4
f
Macroscopic examination 2 specimens —
Visual testing 100 % —
Penetrant or magnetic particle test-
Fillet weld — Figure 3 and
b
100 %
ing
Figure 4
f
e
Hardness test required
Macroscopic examination 2 specimens —
a
Ultrasonic testing shall not be used for t < 8 mm, neither for material groups 8, 10, 41 to 48.
b
Accessible weld surfaces: penetrant testing or magnetic particle testing. For non-magnetic materials, penetrant testing.
c
Bend tests in accordance with 7.4.2.
d
One set in the weld metal and one set in the HAZ for materials ≥ 12 mm thick and having specified impact properties required
by technical delivery conditions and/or if appropriate in accordance with the service conditions. Application standards can
require impact testing for < 12 mm thicknesses. The testing temperature shall be chosen by the manufacturer considering the
application or application standards. For additional tests shall be in accordance with 7.4.4.
e
For hardness tests in accordance with 7.4.5 and Table 3. Not required for parent materials: sub-group 1.1, groups 8 and 41 to
48 and dissimilar joints between these groups, except for dissimilar joints between sub-group 1.1 and group 8.
f
Mechanical tests required by an application standard shall be performed. If an additional test piece is needed, the dimensions
should be sufficient to allow mechanical testing. For this additional test piece, the welding parameters, parent material group,
filler material and heat treatment shall be in accordance with the same pWPS.
g
For outside diameters ≤ 50 mm, no ultrasonic testing is required. Radiographic testing is required provided that the joint
configuration can provide valid results. For outside diameters > 50 mm and where it is not technically possible to carry out
ultrasonic testing, radiographic testing shall be performed provided that the joint configuration will provide valid results.
7.2 Location and taking of test specimens
Test specimens shall be taken in accordance with Figures 5, 6, 7 and 8.
It is acceptable to take the test specimens from locations avoiding areas which have imperfections within
the acceptance limits for the NDT method(s) used.
ISO/DIS 15614-1:2025(en)
Dimensions in millimetres
Key
1 discard 25 mm (removal using non-thermal methods)
2 welding direction
3 area for:
— 1 tensile test specimen
— bend test specimens
4 area for:
— impact and additional test specimens if required
5 area for:
— 1 tensile test specimen
— bend test specimens
6 area for:
— 1 macroscopic test specimen
— 1 hardness test specimen
NOTE Not to scale.
Figure 5 — Location of test specimens – butt welds in plate
ISO/DIS 15614-1:2025(en)
Key
1 end of weld
2 area for:
— 1 tensile test specimen
— bend test specimens
3 area for:
— impact and additional test specimens if required
4 area for:
— 1 tensile test specimen
— bend test specimens
5 start of weld; area for:
— 1 macroscopic test specimen
— 1 hardness test specimen (taken from the start of weld)
6 weld direction
NOTE Not to scale.
Figure 6 — Location of test specimens – butt welds in pipe
ISO/DIS 15614-1:2025(en)
Dimensions in millimetres
Key
1 discard 25 mm (removal using non-thermal methods)
2 macroscopic test specimen
3 macroscopic and hardness test specimen
4 welding direction
Figure 7 — Location of test specimens – T-joints
Key
A macroscopic and hardness test specimen to be taken
B macroscopic test specimen to be taken
α branch angle
Figure 8 — Location of test specimens – branch connections on pipe
7.3 Non-destructive testing, NDT
Any post-weld heat treatment (PWHT) that is specified shall be completed prior to NDT.
ISO/DIS 15614-1:2025(en)
For materials that are susceptible to hydrogen induced cracking, and where no post-heating or no PWHT is
specified, NDT shall be delayed.
All NDT, in accordance with 7.1, shall be performed on the test pieces prior to cutting of the test specimens.
All tests shall meet or exceed the acceptance criteria in accordance with 7.5.
NDT shall not be performed on the discarded material (see Figure 5 and Figure 7).
Depending upon joint geometry, materials and the requirements for work, NDT shall be performed as
required in Table 1 and Table 2 in accordance with:
— ISO 3452-1 (penetrant testing, PT)
— ISO 13588 (ultrasonic testing, phased array, UT
...
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