SIST EN ISO 11970:2016
(Main)Specification and approval of welding procedures for production welding of steel castings (ISO 11970:2016)
Specification and approval of welding procedures for production welding of steel castings (ISO 11970:2016)
This International Standard specifies how a welding procedure specification (WPS) for production
welding of steel castings is qualified.
It defines the conditions for the execution of welding procedure qualification tests and the limits of
validity of a qualified welding procedure for all practical welding operations within the range of
essential variables.
Tests are intended to be carried out in accordance with this International Standard unless additional
tests are specified by the purchaser or by agreement between the contracting parties.
This International Standard applies to the arc welding of steel castings. The principles of this
International Standard can be applied to other fusion welding processes subject to agreement between
the contracting parties.
In the case of specific service, material or manufacturing conditions, tests more comprehensive than
those specified by this International Standard can be specified by the purchaser, in order to gain more
information, e.g. longitudinal weld tensile tests, bend tests, chemical analyses, ferrite determination in
austenitic stainless steels, elongation, Charpy “V” impact tests, and radiography
Anforderungen und Anerkennung von Schweißverfahren für das Produktionsschweißen von Stahlguss (ISO 11970:2016)
Diese Internationale Norm legt fest, wie die Schweißanweisung (en: welding procedure specification ,= WPS) für Produktionsschweißungen von Stahlguss anerkannt wird.
Es werden Bedingungen für die Durchführung der Anerkennung von Verfahrensprüfungen und die Grenzen der Gültigkeit eines anerkannten Schweißverfahrens für alle praktischen Schweißtätigkeiten im Bereich der grundlegenden Einflussgrößen definiert.
Prüfungen sind in Übereinstimmung mit dieser Internationalen Norm durchzuführen, wenn nicht zusätzliche Prüfungen durch den Kunden oder durch Übereinkunft zwischen den Vertragsparteien festgelegt werden.
Diese Internationale Norm gilt für das Lichtbogenschweißen von Stahlguss. Die Prinzipien dieser Internationalen Norm dürfen auch auf andere Schmelzschweißverfahren angewendet werden, falls es eine entsprechende Übereinkunft zwischen den Vertragsparteien gibt.
Umfassendere Prüfungen, als sie in dieser Internationalen Norm aufgeführt sind, dürfen zur besseren Information des Kunden von diesem für bestimmte Einsatz , Werkstoff oder Herstellbedingungen verlangt werden, z. B. Längszugversuche an der Schweißnaht, Biegeversuche, chemische Analysen, Ferrit Bestimmung in austenitischen nichtrostenden Stählen, Dehnung, Charpy V Kerbschlagbiegeversuch, Durchstrahlung usw.
Descriptif et qualification d'un mode opératoire de soudage pour le soudage de production des aciers moulés (ISO 11970:2016)
ISO 11970:2016 spécifie comment qualifier un descriptif de mode opératoire de soudage (DMOS) pour le soudage de production des pièces en acier moulé.
Elle définit les conditions d'exécution des épreuves de qualification et les limites de validité d'un mode opératoire qualifié, pour toutes les opérations pratiques de soudage dans la limite de variation des paramètres essentiels considérés.
Les essais sont destinés à être effectués conformément à la présente Norme internationale, sauf si des essais complémentaires sont spécifiés par l'acheteur ou par accord entre les parties contractantes.
ISO 11970:2016 s'applique au soudage à l'arc des pièces en acier moulé. Les principes de la présente Norme internationale peuvent s'appliquer à d'autres procédés de soudage par fusion, sous réserve d'accord préalable entre les parties contractantes.
Dans le cas d'une utilisation, d'un matériau ou de conditions de fabrication spécifiques, des essais plus étendus que ceux spécifiés par la présente Norme internationale peuvent être demandés par l'acheteur, afin d'obtenir plus d'informations, par exemple essais de traction longitudinale dans la soudure, essais de pliage, analyses chimiques, détermination du taux de ferrite dans les aciers inoxydables austénitiques, allongement, essais de flexion par choc Charpy «V» et contrôles radiographiques.
Popis in odobritev varilnih postopkov za proizvodno varjenje jeklenih ulitkov (ISO 11970:2016)
Ta mednarodni standard določa, kako se specifikacija varilnega postopka kvalificira za proizvodno varjenje jeklenih ulitkov.
Določa pogoje za izvajanje preskusov za kvalificiranje varilnih postopkov in omejitve veljavnosti kvalificiranih varilnih postopkov za vse praktične postopke varjenja v obsegu osnovnih spremenljivk.
Preskusi se izvajajo v skladu s tem mednarodnim standardom, razen če dodatne preskuse opredeli kupec ali se o njih dogovorita pogodbeni strani.
Ta mednarodni standard se uporablja za obločno varjenje jeklenih ulitkov. Načela tega
mednarodnega standarda se lahko uporabljajo za druge postopke talilnega varjenja, odvisno od dogovora med pogodbenima stranema.
V primeru specifične storitve, materiala ali pogojev izdelave lahko kupec opredeli preskuse, ki so obširnejši od teh, navedenih v tem mednarodnem standardu, da se pridobi več informacij, npr. vzdolžni natezni preskusi zvarov, testi upogibnosti, kemične analize, ugotavljanje železa v avstenitnih nerjavnih jeklih, raztezek, udarni preskusi po Charpyju »V« in radiografija.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11970:2016
01-oktober-2016
1DGRPHãþD
SIST EN ISO 11970:2007
Popis in odobritev varilnih postopkov za proizvodno varjenje jeklenih ulitkov (ISO
11970:2016)
Specification and approval of welding procedures for production welding of steel castings
(ISO 11970:2016)
Anforderungen und Anerkennung von Schweißverfahren für das Produktionsschweißen
von Stahlguss (ISO 11970:2016)
Descriptif et qualification d'un mode opératoire de soudage pour le soudage de
production des aciers moulés (ISO 11970:2016)
Ta slovenski standard je istoveten z: EN ISO 11970:2016
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
77.140.80 Železni in jekleni ulitki Iron and steel castings
SIST EN ISO 11970:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11970:2016
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SIST EN ISO 11970:2016
EN ISO 11970
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 25.160.10; 77.140.80 Supersedes EN ISO 11970:2007
English Version
Specification and qualification of welding procedures for
production welding of steel castings (ISO 11970:2016)
Descriptif et qualification de modes opératoires de Anforderungen und Anerkennung von
soudage pour le soudage de production des aciers Schweißverfahren für das Produktionsschweißen von
moulés (ISO 11970:2016) Stahlguss (ISO 11970:2016)
This European Standard was approved by CEN on 10 January 2016.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11970:2016 E
worldwide for CEN national Members.
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SIST EN ISO 11970:2016
EN ISO 11970:2016 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 11970:2016
EN ISO 11970:2016 (E)
European foreword
This document (EN ISO 11970:2016) has been prepared by Technical Committee ISO/TC 17 " Steel" in
collaboration with Technical Committee ECISS/TC 111 “Steel castings and forgings” 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 September 2016, and conflicting national standards
shall be withdrawn at the latest by September 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 11970:2007.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 11970:2016 has been approved by CEN as EN ISO 11970:2016 without any modification.
3
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SIST EN ISO 11970:2016
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SIST EN ISO 11970:2016
INTERNATIONAL ISO
STANDARD 11970
Second edition
2016-03-01
Specification and qualification of
welding procedures for production
welding of steel castings
Descriptif et qualification de modes opératoires de soudage pour le
soudage de production des aciers moulés
Reference number
ISO 11970:2016(E)
©
ISO 2016
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SIST EN ISO 11970:2016
ISO 11970:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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SIST EN ISO 11970:2016
ISO 11970:2016(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope .1
2 Normative references .1
3 Terms and definitions . 2
4 Preliminary welding procedure specification (pWPS) . 2
5 Welding procedure qualification . 2
6 Test piece . 2
6.1 General . 2
6.2 Shape and dimensions of test piece . 2
6.3 Welding of sample . 3
7 Examination and testing .5
7.1 Extent of testing . 5
7.2 Location and cutting of test specimens . 5
7.3 Non-destructive testing . 5
7.4 Destructive test . 7
7.4.1 Transverse (to weld groove) tensile test . 7
7.4.2 Macro-examination . 7
7.4.3 Micro-examination . 7
7.4.4 Impact test . 7
7.4.5 Hardness test . 7
7.5 Qualification and retesting . 8
7.6 Welder qualification . 8
8 Range of qualification .8
8.1 General . 8
8.2 Related to the manufacturer . 8
8.3 Related to the material . 9
8.3.1 Parent metal — Grouping system for cast steel grades. 9
8.3.2 Parent metal thickness (range of qualification) .10
8.4 Common to all welding procedures .10
8.4.1 Welding process .10
8.4.2 Welding positions . . .10
8.4.3 Type of joint .10
8.4.4 Filler metal .10
8.4.5 Type of current .10
8.4.6 Heat input .10
8.4.7 Preheat temperature .11
8.4.8 Interpass temperature .11
8.4.9 Post-weld heat treatment .11
8.5 Specific to process .11
8.5.1 Processes 111 [manual metal arc welding (metal arc welding with
covered electrode); shielded metal arc welding] and 114 (self-shielded
tubular-cored arc welding). .11
8.5.2 Process 121 (submerged arc welding with one wire electrode).11
8.5.3 Processes 131 (metal-arc inert gas welding; MIG welding; gas metal arc
welding), 135 (metal active gas welding; MAG welding; gas metal arc
welding), 136 (tubular cored metal arc welding with active gas shield;
flux cored arc welding) and 138 (MAG welding with metal cored electrode) .11
8.5.4 Process 141 (Tungsten inert gas welding; TIG welding; gas tungsten
arc welding) .11
9 Welding procedure qualification record (WPQR) .11
© ISO 2016 – All rights reserved iii
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SIST EN ISO 11970:2016
ISO 11970:2016(E)
Annex A (informative) Record form (WPQR) welding procedure qualification — Test certificate .13
Annex B (normative) Details of weld test .14
Bibliography .16
iv © ISO 2016 – All rights reserved
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SIST EN ISO 11970:2016
ISO 11970:2016(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 11, Steel castings.
This second edition cancels and replaces the first edition (ISO 11970:2001), which has been technically
revised. In particular, Figures 1, 2 and 3 have been redrawn to clarify labels.
© ISO 2016 – All rights reserved v
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SIST EN ISO 11970:2016
ISO 11970:2016(E)
Introduction
All welding procedure qualifications for production welding of steel castings are intended to be in
accordance with this International Standard.
Previous procedure qualifications that conform to the range of qualification of Clause 8 are valid under
this International Standard.
Where additional tests have to be carried out to complete the qualification, it is only necessary to
perform the additional tests to the requirements of Clauses 6 and 7.
vi © ISO 2016 – All rights reserved
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SIST EN ISO 11970:2016
INTERNATIONAL STANDARD ISO 11970:2016(E)
Specification and qualification of welding procedures for
production welding of steel castings
1 Scope
This International Standard specifies how a welding procedure specification (WPS) for production
welding of steel castings is qualified.
It defines the conditions for the execution of welding procedure qualification tests and the limits of
validity of a qualified welding procedure for all practical welding operations within the range of
essential variables.
Tests are intended to be carried out in accordance with this International Standard unless additional
tests are specified by the purchaser or by agreement between the contracting parties.
This International Standard applies to the arc welding of steel castings. The principles of this
International Standard can be applied to other fusion welding processes subject to agreement between
the contracting parties.
In the case of specific service, material or manufacturing conditions, tests more comprehensive than
those specified by this International Standard can be specified by the purchaser, in order to gain more
information, e.g. longitudinal weld tensile tests, bend tests, chemical analyses, ferrite determination in
austenitic stainless steels, elongation, Charpy “V” impact tests, and radiography.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable to its application. 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 857-1, Welding and allied processes — Vocabulary — Part 1: Metal welding processes
ISO 4136, Destructive tests on welds in metallic materials — Transverse tensile test
ISO 4969, Steel — Macroscopic examination by etching with strong mineral acids
ISO 4986, Steel castings — Magnetic particle inspection
ISO 4987, Steel castings — Liquid penetrant inspection
ISO 4992-1, Steel castings — Ultrasonic examination — Part 1: Steel castings for general purposes
ISO 4992-2, Steel castings — Ultrasonic examination — Part 2: Steel castings for highly stressed components
ISO 4993, Steel and iron castings – Radiographic inspection
ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) — Quality levels for imperfections
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6892-1, Metallic materials – Tensile testing – Part 1: Method of test at room temperature
ISO 9016, Destructive tests on welds in metallic materials — Impact tests — Test specimen location, notch
orientation and examination
© ISO 2016 – All rights reserved 1
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SIST EN ISO 11970:2016
ISO 11970:2016(E)
ISO 9606-1, Qualification testing of welders — Fusion welding — Part 1: Steels
ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules
ISO 15612, Specification and qualification of welding procedures for metallic materials — Qualification by
adoption of a standard welding procedu
...
SLOVENSKI STANDARD
oSIST prEN ISO 11970:2014
01-januar-2014
Popis in odobritev varilnih postopkov za proizvodno varjenje jeklenih ulitkov
(ISO/DIS 11970:2013)
Specification and approval of welding procedures for production welding of steel castings
(ISO/DIS 11970:2013)
Anforderungen und Anerkennung von Schweißverfahren für das Produktionsschweißen
von Stahlguss (ISO/DIS 11970:2013)
Descriptif et qualification d'un mode opératoire de soudage pour le soudage de
production des aciers moulés (ISO/DIS 11970:2013)
Ta slovenski standard je istoveten z: prEN ISO 11970
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
77.140.80 Železni in jekleni ulitki Iron and steel castings
oSIST prEN ISO 11970:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 11970:2014
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oSIST prEN ISO 11970:2014
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ISO/DIS 11970
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Specification and approval of welding procedures for
production welding of steel castings
Descriptif et qualification d’un mode opératoire de soudage pour le soudage de production sur aciers
moulés
[Revision of first edition (ISO 11970:2001)]
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oSIST prEN ISO 11970:2014
ISO/DIS 11970:2013(E)
Copyright notice
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permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
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oSIST prEN ISO 11970:2014
ISO/DIS 11970:2013(E)
Contents Page
Foreword . v!
Introduction . vi!
1! Scope . 1!
2! Normative references . 1!
3! Terms and definitions . 2!
4! Preliminary welding procedure specification (pWPS) . 2!
5! Welding procedure test . 2!
6! Test piece . 3!
7! Examination and testing . 6!
8! Range of approval . 9!
9! Welding procedure approval record (WPAR) . 13!
Annex A (informative) Welding procedure approval — Record form (WPAR) welding procedure
approval — Test certificate . 14!
Annex B (normative) Details of weld test . 15!
Annex C (informative) Changes to ISO 11970 . 17
iv
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oSIST prEN ISO 11970:2014
ISO/DIS 11970:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 11, Steel castings.
This second/third/. edition cancels and replaces the first/second/. edition (ISO 11970:2001), [clause(s) /
subclause(s) / table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.
Annex B forms a normative part of this International Standard. Annex A is for information only.
v
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oSIST prEN ISO 11970:2014
ISO/DIS 11970:2013(E)
Introduction
All welding procedure approvals for production welding of steel castings shall be in accordance with this
International Standard from the date of its issue.
Previous procedure approvals that conform to the range of approval of clause 8 are valid under this International
Standard.
Where additional tests have to be carried out to complete the approval it is only necessary to perform the additional
tests to the requirements of clauses 6 and 7.
vi
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oSIST prEN ISO 11970:2014
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oSIST prEN ISO 11970:2014
ISO/DIS 11970:2013(E)
Specification and approval of welding procedures for production
welding of steel castings
1 Scope
This International Standard specifies how a welding procedure specification (WPS) for production welding of steel
castings is approved,
It defines the conditions for the execution of welding procedure approval tests and the limits of validity of an
approved welding procedure for all practical welding operations within the range of essential variables.
Tests shall be carried out in accordance with this International Standard unless additional tests are specified by the
purchaser or by agreement between the contracting parties.
This International Standard applies to the arc welding of steel castings. The principles of this International Standard
may be applied to other fusion welding processes subject to agreement between the contracting parties.
In the case of specific service, material or manufacturing conditions, more comprehensive tests may be specified
by the purchaser, than are specified by this International Standard, in order to gain more information, e.g.
longitudinal weld tensile tests, bend tests, chemical analyses, ferrite determination in austenitic stainless steels,
elongation, Charpy “V” impact tests, radiography, etc.
2 Normative references
The following referenced documents are indispensable for the application 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 857-1, Welding and allied processes — Vocabulary —Part 1: Metal welding processes.
ISO 4969, Steel — Macroscopic examination by etching with strong mineral acids.
ISO 4986, Steel castings — Magnetic particle inspection.
ISO 4987, Steel castings — Liquid penetrant inspection.
ISO 4992-1, Steel castings — Ultrasonic examination -- Part 1: Steel castings for general purposes.
ISO 4992-2, Steel castings — Ultrasonic examination -- Part 2: Steel castings for highly stressed components
ISO 4993, Steel and iron castings -- Radiographic inspection
ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) —
Quality levels for imperfections.
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method.
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oSIST prEN ISO 11970:2014
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ISO 6892-1, Metallic materials -- Tensile testing -- Part 1: Method of test at room temperature.
ISO 6947, Welding and allied processes -- Welding positions.
ISO 9606-1, Approval testing of welders — Fusion welding — Part 1: Steels.
ISO 9692-1, Welding and allied processes -- Recommendations for joint preparation -- Part 1: Manual metal-arc
welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels.
ISO 15607, Specification and qualification of welding procedures for metallic materials -- General rules.
ISO 15612, Specification and qualification of welding procedures for metallic materials -- Qualification by adoption
of a standard welding procedure.
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 857-1 and ISO 15607 as well
as the following apply.
3.1
production welding
any welding carried out during manufacturing before final delivery to the purchaser including joint welding of
castings and finishing welding
3.1.1
joint welding
welding used to weld cast components together or weld cast components to wrought steels in order to obtain an
integral unit
3.1.2
finishing welding
welding carried out in order to ensure the agreed quality of the casting
3.2
repair welding
any welding carried out after delivery to the end user, i.e. after the casting has been in service
4 Preliminary welding procedure specification (pWPS)
A preliminary welding procedure specification shall be prepared. It shall specify the range of all the relevant
parameters according to ISO 15612.
5 Welding procedure qualification
The making and testing of test pieces representing the type and the position of welding used in production shall be
in accordance with clauses 6 and 7.
The welder who undertakes the welding procedure test satisfactorily in accordance with this International Standard
is approved for the appropriate range of approval according to ISO 9606-1. Additional welders shall be qualified in
accordance with 7.6.
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oSIST prEN ISO 11970:2014
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6 Test piece
6.1 General
The test piece shall be in accordance with that shown in Figures 1a and 1b.
6.2 Shape and dimensions of test piece
Additional test pieces, or longer test pieces than the minimum size may be prepared in order to allow for extra
and/or retesting specimens (in accordance with 7.5).
6.3 Welding of test piece
The preparation and welding of the test piece shall be carried out in accordance with the relevant pWPS. Angular
tolerances may be agreed between the contracting parties or by the relevant application standard.
The dimensions and shape of the groove shall be in accordance with ISO 9692-1.
If tack welds are to be fused into the final joint they shall be included in the test piece.
Unless otherwise specified in the purchase order or contract review, welding and testing of the test piece(s) shall
be witnessed by an examiner (or test body). When the examiner (or test body) is not specified in the purchase
order the manufacturer may appoint a suitable examiner.
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oSIST prEN ISO 11970:2014
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Dimensions in millimetres
a
c = 3t W 150 mm.
b
b = 6t W 350 mm.
c
t W 15 mm.
d
t W 0,5t
1
e
a = 5 mm to 15 mm or α = 5° to 20°
Key
1 Discard
2 Inspection length
NOTE The dimensions shown are for information only and may be adjusted to meet production and testing requirements.
Figure 1a – Test piece (Plate)
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oSIST prEN ISO 11970:2014
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Dimensions in millimetres
f
Edge preparation and fit-up as detailed in the
preliminary Welding Procedure Specification
(pWPS).
g
e W 150 mm
h
d = outside diameter
NOTE The dimensions shown are for information only and may be adjusted to meet production and testing
requirements.
Figure 1 b – Test piece (Tube)
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oSIST prEN ISO 11970:2014
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7 Examination and testing
7.1 Extent of testing
The examination and testing includes both non-destructive examination (NDE) and destructive testing (DT) which
shall be in accordance with the requirements of Table 1.
Table 1 — Examination and testing of the test pieces
Type of test Extent
Visual 100 %
a b
100 %
Radiographic or ultrasonic
c
Surface crack detection 100 %
1 specimen
Transverse tensile test
d 2 sets
Impact test
if required by the purchase order or by the relevant application standard
Hardness test
if required by the purchase order or by the relevant application standard
Macro-examination
if required by the purchase order or by the relevant application standard
Micro-examination
if required by the purchase order or by the relevant application standard
Bend tests
if required by the purchase order or by the relevant application standard
Corrosion tests
if required by the purchase order or by the relevant application standard
Additional tests
a
Radiographic testing shall be carried out in accordance with ISO 4993.
b
Ultrasonic testing shall be carried out in accordance with ISO 4992-1 or 4992-2.
c
Magnetic particle testing in accordance with ISO 4986 or, dye penetrant in accordance with ISO 4987.
d
Impact V-notch tests are only required when the parent metal requires impact testing The same number of tests are
required in the weld metal and HAZ.
All tests shall be carried out after any required post weld heat treatment.
7.2 Location and cutting of test pieces
Location and cutting of test pieces shall be in accordance with Fig
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