BS EN ISO 15609‑1:2019
BSI Standards Publication
Specification and qualification of welding
procedures for metallic materials —
Welding procedure specification
Part 1: Arc welding
BS EN ISO 15609‑1:2019
BRITISH STANDARD
National foreword
This British Standard is the UK implementation of
EN ISO 15609‑1:2019. It is identical to ISO 15609‑1:2019. It supersedes
BS EN ISO 15609‑1:2004, which is withdrawn.
The UK participation in its preparation was entrusted to Technical
Committee WEE/36, Qualification of welding personnel and
welding procedures.
A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions
of a contract. Users are responsible for its correct application.
© The British Standards Institution 2019
Published by BSI Standards Limited 2019
ISBN 978 0 539 00266 9
ICS 25.160.10
Compliance with a British Standard cannot confer immunity from
legal obligations.
This British Standard was published under the authority of the
Standards Policy and Strategy Committee on 31 October 2019.
Amendments/corrigenda issued since publication
Date
Text affected
BS EN ISO 15609‑1:2019
EN ISO 15609-1
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2019
ICS 25.160.10
Supersedes EN ISO 15609-1:2004
English Version
Specification and qualification of welding procedures for
metallic materials - Welding procedure specification - Part
1: Arc welding (ISO 15609-1:2019)
Descriptif et qualification d'un mode opératoire de
soudage pour les matériaux métalliques - Descriptif
d'un mode opératoire de soudage - Partie 1: Soudage à
l'arc (ISO 15609-1:2019)
Anforderung und Qualifizierung von Schweißverfahren
für metallische Werkstoffe - Schweißanweisung - Teil
1: Lichtbogenschweißen (ISO 15609-1:2019)
This European Standard was approved by CEN on 26 August 2019.
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
© 2019 CEN
All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.
Ref. No. EN ISO 15609-1:2019 E
BS EN ISO 15609‑1:2019
EN ISO 15609-1:2019 (E)
European foreword
This document (EN ISO 15609-1:2019) 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 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 April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
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 15609-1:2004.
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 15609-1:2019 has been approved by CEN as EN ISO 15609-1:2019 without any
modification.
3
BS EN ISO 15609‑1:2019
ISO 15609-1:2019(E)

Contents
Page
Foreword......................................................................................................................................................................................................................................... iv
Introduction...................................................................................................................................................................................................................................v
1
2
3
4
Scope.................................................................................................................................................................................................................................. 1
Normative references....................................................................................................................................................................................... 1
Terms and definitions...................................................................................................................................................................................... 1
Technical content of welding procedure specification (WPS)............................................................................... 2
4.1
General............................................................................................................................................................................................................ 2
4.2
Related to the manufacturer........................................................................................................................................................ 2
4.3
Related to the parent material.................................................................................................................................................... 2
4.3.1
Parent material type...................................................................................................................................................... 2
4.3.2
Material dimensions...................................................................................................................................................... 2
4.4
Common to all welding procedures....................................................................................................................................... 2
4.4.1
Welding process................................................................................................................................................................ 2
4.4.2
Joint design............................................................................................................................................................................ 2
4.4.3
Welding position............................................................................................................................................................... 2
4.4.4
Joint preparation............................................................................................................................................................... 3
4.4.5
Welding technique........................................................................................................................................................... 3
4.4.6
Back gouging........................................................................................................................................................................ 3
4.4.7
Backing...................................................................................................................................................................................... 3
4.4.8
Welding consumables................................................................................................................................................... 3
4.4.9
Electrical parameters.................................................................................................................................................... 3
4.4.10 Mechanized and automatic welding................................................................................................................ 3
4.4.11 Preheating temperature............................................................................................................................................. 4
4.4.12 Interpass temperature................................................................................................................................................. 4
4.4.13 Preheat maintenance temperature................................................................................................................... 4
4.4.14 Postheating for hydrogen release....................................................................................................................... 4
4.4.15 Post-weld heat treatment.......................................................................................................................................... 4
4.4.16 Shielding gas......................................................................................................................................................................... 4
4.4.17 Heat input / Arc energy.............................................................................................................................................. 4
4.5
Specific to a group of welding processes........................................................................................................................... 4
4.5.1
Process 111 (Manual metal arc welding).................................................................................................... 4
4.5.2
Process 12 (Submerged arc welding)............................................................................................................. 4
4.5.3
Process 13 (Gas-shielded metal arc welding).......................................................................................... 5
4.5.4
Process 14 (Gas-shielded welding with non-consumable electrode)................................. 5
4.5.5
Process 15 (Plasma arc welding)........................................................................................................................ 5
Annex A (informative) Welding Procedure Specification (WPS).............................................................................................. 6
Bibliography................................................................................................................................................................................................................................. 7
© ISO 2019 – All rights reserved

iii
BS EN ISO 15609‑1:2019
ISO 15609-1:2019(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 44, Welding and allied processes,
Subcommittee SC 10, Quality management in the field of welding.
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 TC 44 documents, where they exist, are available from this page: https:​
//committee​.iso​.org/sites/tc44/home/interpretation​.html.
This second edition cancels and replaces the first edition (ISO 15609-1:2004), which has been
technically revised. It also incorporates the Corrigendum ISO 15609-1:2004/Cor.1:2005.
The main changes compared to the previous edition are as follows:
— Clause 2 has been updated;
— editorial changes have been made;
— the former Note 1 in 4.1 has been moved to regular text;
— surface conditions have been added in 4.4.4;
— Subclause 4.4.10 has been technically revised;
— arc energy has been added in 4.4.17;
— Annex A has been revised.
A list of all parts in the ISO 15609 series can be found on the ISO website.
iv

© ISO 2019 – All rights reserved
BS EN ISO 15609‑1:2019
ISO 15609-1:2019(E)

Introduction
All new welding procedure specifications need to be prepared in accordance with this document
from the date of its issue. However, this document does not invalidate previous welding procedure
specifications made to former standards or specifications or previous editions of this document.
© ISO 2019 – All rights reserved

v
BS EN ISO 15609‑1:2019
INTERNATIONAL STANDARD
ISO 15609-1:2019(E)
Specification and qualification of welding procedures for
metallic materials — Welding procedure specification —
Part 1:
Arc welding
1 Scope
This document specifies requirements for the content of welding procedure specifications for arc
welding processes.
Details of the ISO 15609 series are given in ISO 15607. The variables listed in this document are those
influencing the quality of the welded joint.
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 4063, Welding and allied processes — Nomenclature of processes and reference numbers
ISO 6848, Arc welding and cutting — Nonconsumable tungsten electrodes — Classification
ISO 6947, Welding and allied processes — Welding positions
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/TR 15608, Welding — Guidelines for a metallic materials grouping system
ISO/TR 18491, Welding and allied processes — Guidelines for measurement of welding energies
ISO/TR 20172, Welding — Grouping systems for materials — European materials
ISO/TR 20173, Welding — Grouping systems for materials — American materials
ISO/TR 20174, Welding — Grouping systems for materials — Japanese materials
ISO/TR 25901 (all parts), Welding and allied processes — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 15607 and
ISO/TR 25901 (all parts) apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:​//www​.iso​.org/obp
— IEC Electropedia: available at http:​//www​.electropedia​.org/
© ISO 2019 – All rights reserved

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BS EN ISO 15609‑1:2019
ISO 15609-1:2019(E)

4 Technical content of welding procedure specification (WPS)
4.1 General
A preliminary welding procedure specification/welding procedure specification (pWPS/WPS) shall
provide all the necessary information required to make a weld. The information required in a pWPS/
WPS is given in 4.2 to 4.5.
For some applications, it can be necessary to supplement or reduce the list.
Welding procedure specifications cover all certain range of necessary information to make a weld.
Some manufacturers prefer additionally to prepare work instructions for each specific job as part of
detailed production planning.
Ranges and tolerances, according to the relevant standard (see ISO 15607) and to the manufacturer's
experience, shall be specified where appropriate.
An example of the WPS-format is shown in Annex A.
4.2 Related to the manufacturer
— Identification of the manufacturer.
— Identification of the WPS.
— Reference to the welding procedure qualification record (WPQR) or other documents as required
(see ISO 15607).
4.3 Related to the parent material
4.3.1
Parent material type
— Designation of the material(s), and reference standard(s).
— Number(s) of the group(s) as given in ISO/TR 20172, ISO/TR 20173 or ISO/TR 20174. If the material
is not assigned in those, ISO/TR 15608 shall be used. A WPS may cover a group of materials.
4.3.2
Material dimensions
— Thickness ranges of the materials.
— Outside diameter ranges for pipes.
4.4 Common to all welding procedures
4.4.1
Welding process
Welding process(es) used in accordance with ISO 4063.
4.4.2
Joint design
— A sketch of the joint design/configuration and dimensions or reference which provide such
information.
— Weld run sequence given on the sketch if essential for the properties of the weld.
4.4.3
Welding position
Applicable welding positions in accordance with ISO 6947.
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© ISO 2019 – All rights reserved
BS EN ISO 15609‑1:2019
4.4.4
ISO 15609-1:2019(E)

Joint preparation
— Surface condition, cleaning, degreasing, including methods to be used.
— Jigging, fixtures and tack welding.
4.4.5
Welding technique
— Weaving if applicable;
a)
For manual welding and partly mechanized maximum width of the run.
b) For fully mechanized and automatic welding, maximum weaving or amplitude, frequency and
dwell time of oscillation.
— Torch, electrode and/or wire angle (if required).
4.4.6
Back gouging
— The method to be used.
— Depth and shape.
4.4.7
Backing
The type of backing, e. g. material backing, gas backing or flux backing.
4.4.8
Welding consumables
— Designation, make (manufacturer and trade name).
— Dimensions (size).
— Handling (e.g. drying, holding in a heated quiver).
4.4.9
Electrical parameters
— Type of current [alternating current (AC) or direct current (DC)] and polarity.
— Pulse welding details (machine settings, programme selection and all pertinent information of the
process) if applicable.
— Current range.
— Voltage range (if applicable).
— Wire speed feed range for mechanized and automatic welding.
4.4.10 Mechanized and automatic welding
— Travel speed range.
— Wire/strip feed speed range.
If the equipment does not permit control of one of either variable, the machine settings shall be specified
instead. The range of application for the WPS shall then be limited to equipment of that particular type.
This applies to 4.4.9 and 4.4.10.
© ISO 2019 – All rights reserved

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BS EN ISO 15609‑1:2019
ISO 15609-1:2019(E)

4.4.11 Preheating temperature
4.4.11.1 General
The minimum temperature applied at the start of welding and during welding.
4.4.11.2 Work piece temperature
If preheating is not required the lowest work piece temperature prior to welding.
4.4.12 Interpass temperature
Maximum and if necessary minimum interpass temperature.
4.4.13 Preheat maintenance temperature
The minimum temperature in the weld zone which shall be maintained if welding is interrupted.
See ISO 13916 for application of 4.4.11, 4.4.12 and 4.4.13.
4.4.14 Postheating for hydrogen release
— Temperature range.
— Minimum holding time.
4.4.15 Post-weld heat treatment
The minimum time and temperature range for post-weld heat treatment or ageing shall be specified or
reference shall be made to other standards which specify this information.
4.4.16 Shielding gas
Designation in accordance with ISO 14175 and, where applicable, the composition, manufacturer and
trade name.
4.4.17 Heat input / Arc energy
Range of heat input or arc energy (if specified) in accordance with ISO/TR 18491.
4.5 Specific to a group of welding processes
4.5.1
Process 111 (Manual metal arc welding)
The run-out length of electrode consumed or travel speed.
4.5.2
Process 12 (Submerged arc welding)
— For multiple electrode systems, the number and configuration of wire electrodes and polarity.
— Distance contact tube/work piece: the distance from contact tip nozzle to the surface of the
work piece.
— Flux: designation, manufacturer and trade name.
— Additional filler material.
— Arc voltage range.
4

© ISO 2019 – All rights reserved
BS EN ISO 15609‑1:2019
4.5.3
ISO 15609-1:2019(E)

Process 13 (Gas-shielded metal arc welding)
— Shielding gas flow rate and nozzle diameter.
— Number of wire electrodes.
— Additional filler material.
— The distance from the contact tip/contact tube to the surface of the work piece.
— Arc voltage range.
— Mode of metal transfer.
4.5.4
Process 14 (Gas-shielded welding with non-consumable electrode)
— Tungsten electrode: the diameter, and codification in accordance with ISO 6848.
— Shielding gas flow rate and nozzle diameter.
— Additional filler materials.
4.5.5
Process 15 (Plasma arc welding)
— Plasma gas parameters, e.g. composition, nozzle diameter, flow rate.
— Shielding gas flow rate and nozzle diameter.
— Type of torch.
— Distance contact tube/work piece: the distance from the nozzle to the surface of the work piece.
© ISO 2019 – All rights reserved

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BS EN ISO 15609‑1:2019
ISO 15609-1:2019(E)

Annex A
(informative)
Welding Procedure Specification (WPS)
Welding Procedure Specification:
The user of this form is allowed to copy this form.
WPQR No.:
Method of preparation and cleaning:
Mode(s) of metal transfer:
Material thickness (mm)2:
Manufacturer:
Parent material designation(s):
Outside diameter (mm)2:
Joint type and weld type:
Throat thickness (mm)2:
Deposited weld metal
Degree of mechanization:
Weld preparation details (Sketch)1
Welding details
Run
Welding
process
Welding position:
Joint design
Size of
filler
material
Current 2
A
Voltage2
V
Type of
current/polarity
Welding sequences
Wire feed
speed2
Run out
length1,2/
travel speed1
Arc energy1, 2/
Heat input 1, 2
Filler material designation and make:
Any special baking or drying:
Designation gas/flux:
– shielding:
Gas flow rate
– shielding:
Tungsten electrode type/size:
Other information1, e.g.:
– backing:
Weaving (maximum width of run):
– backing:
Pulse welding details:
Oscillation: amplitude, frequency, dwell time:
Distance contact tube/work piece:
Details of back gouging/backing:
Plasma welding details:
Preheating temperature:
Torch angle:
Interpass temperature:
Postheating:
Pre-heat maintenance temperature:
Post-weld heat treatment and/or ageing:
Time, temperature, method:
Heating and cooling rates1:
.......................................................................
Manufacturer
(name, signature, date)
1 If required.
2 Range.
6

© ISO 2019 – All rights reserved
BS EN ISO 15609‑1:2019
ISO 15609-1:2019(E)

Bibliography
[1]
ISO 13916, Welding — Measurement of preheating temperature, interpass temperature and preheat
maintenance temperature
© ISO 2019 – All rights reserved

7
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