SIST EN ISO 17662:2016
(Main)Welding - Calibration, verification and validation of equipment used for welding, including ancillary activities (ISO 17662:2016)
Welding - Calibration, verification and validation of equipment used for welding, including ancillary activities (ISO 17662:2016)
This International Standard specifies requirements for calibration, verification and validation of
equipment used for
— control of process variables during fabrication, and
— control of the properties of equipment used for welding or welding allied processes
where the resulting output cannot be readily or economically documented by subsequent monitoring, inspection and testing. This involves process variables influencing the fitness-for-purpose and in particular the safety of the fabricated product.
NOTE 1 This International Standard is based on the lists of process variables stated in International
Standards for specification of welding procedures, in particular, but not exclusively in the ISO 15609- series.
Future revisions of these International Standards can result in addition or deletion of parameters considered necessary to specify.
Some guidance is, in addition, given in Annex B as regards requirements for calibration; verification and validation as part of acceptance testing of equipment used for welding or allied processes.
Requirements to calibrate, verify and validate as part of inspection, testing, non-destructive testing
or measuring of final welded products performed in order to verify confirm product compliance are outside the scope of the present International Standard.
The subject of this International Standard is limited to calibration, verification and validation of equipment after installation, as part of the workshops’ and site operations for maintenance and/or
operation.
It needs to be stressed that this International Standard has nothing to do with manufacture and installation of equipment for welding. Requirements for new equipment are formulated in directives and product codes (standards), as necessary.
Annex C provides information when other parties are involved in calibration, verification and validation activities.
Schweißen - Kalibrierung, Verifizierung und Validierung von Einrichtungen einschließlich ergänzender Tätigkeiten, die beim Schweißen verwendet werden (ISO 17662:2016)
Diese Internationale Norm legt die Anforderungen an die Kalibrierung, Verifizierung und Validierung von Einrichtungen fest, die verwendet werden, um
— während der Fertigung die Prozessgrößen zu überwachen, und
— die Eigenschaften der beim Schweißen oder bei verwandten Prozessen verwendeten Einrichtungen zu überwachen,
wenn die erzielten Ergebnisse durch anschließende Überwachung, Inspektion und Prüfung nicht einfach oder wirtschaftlich dokumentiert werden können. Dies schließt die Einflussgrößen der Prozesse, die auf die Gebrauchseigenschaften und besonders auf die Sicherheit des hergestellten Erzeugnisses einwirken, mit ein.
ANMERKUNG 1 Diese Internationale Norm beruht auf Aufstellungen von Prozessgrößen, die in den Internationalen Normen für die Schweißanweisungen, im Besonderen, aber nicht ausschließlich, in der Normenreihe ISO 15609, festgelegt sind. Bei späteren Überarbeitungen dieser Normen können festzulegende Parameter ergänzt oder gestrichen werden.
Anhang B enthält zusätzlich einige Hinweise für die Anforderungen an die Kalibrierung, Verifizierung und Validierung als Teil der Abnahmeprüfung für die beim Schweißen oder bei verwandten Prozessen ver-wendeten Einrichtungen.
Die Anforderungen an die Kalibrierung, Verifizierung und Validierung als Teil der Inspektion, der Prüfung, der zerstörungsfreien Prüfung oder der Messung der geschweißten Endprodukte, die durchgeführt werden, um die Übereinstimmung des Produkts zu verifizieren, liegen außerhalb des Anwendungsbereiches der vorliegenden Internationalen Norm.
Der Inhalt dieser Internationalen Norm ist beschränkt auf die Kalibrierung, Verifizierung und Validierung der Einrichtungen nach der Installation als Teil der Werkstattauslegung und Nebentätigkeiten für die Wartung und/oder für den Betrieb.
Soudage - Étalonnage, vérification et validation du matériel utilisé pour le soudage, y compris pour les procédés connexes (ISO 17662:2016)
ISO 17662:2016 spécifie les exigences relatives à l'étalonnage, la vérification et la validation du matériel utilisé pour:
- la maîtrise des variables du processus en cours de production; et
- la maîtrise des caractéristiques du matériel utilisé pour le soudage ou les activités connexes;
quand l'élément résultant ne peut pas être ultérieurement vérifié dans des conditions simples ou économiques par une surveillance, des contrôles et des essais. Elle implique les variables du processus qui influent sur l'aptitude à l'emploi et en particulier sur la sécurité du produit fabriqué.
NOTE 1 La présente Norme internationale est basée sur des listes de variables de processus indiquées dans les Normes Internationales de descriptifs de modes opératoires de soudage, en particulier, mais pas exclusivement, dans les séries de normes ISO 15609. De futures révisions de ces Normes internationales pourront avoir pour résultat l'ajout ou la suppression de paramètres ayant été jugés comme devant être spécifiés.
Des conseils sont également donnés, en Annexe B, concernant les exigences relatives à l'étalonnage, la vérification et la validation dans le cadre des essais de réception du matériel utilisé pour le soudage ou les activités connexes.
Les exigences relatives à l'étalonnage, la vérification et la validation dans le cadre du contrôle, d'essais destructifs, d'essais non destructifs ou du mesurage de produits finals soudés, effectués pour confirmer la conformité des produits, n'entrent pas dans le cadre de la présente Norme Internationale.
L'objet de la présente Norme internationale se limite à l'étalonnage, la vérification, et la validation du matériel après installation, dans le cadre des opérations du site et de l'atelier pour la maintenance et/ou pour l'opération.
Il est nécessaire de préciser que la présente Norme internationale ne traite pas de la fabrication et de l'installation du matériel de soudage. Les exigences relatives au matériel neuf sont formulées dans les directives et les codes (ou normes) de produits applicables.
L'Annexe C fournit des informations lorsque les autres parties sont impliquées dans des activités d'étalonnage, de vérification et de validation.
Varjenje - Umerjanje, preverjanje in validacija opreme za varjenje, vključno s pomožnimi dejavnostmi (ISO 17662:2016)
Ta mednarodni standard določa zahteve za umerjanje, preverjanje in validacijo
opreme, ki se uporablja za:
– nadzor procesnih spremenljivk med izdelavo in
– nadzor lastnosti opreme, ki se uporablja za varjenje in sorodne procese,
kjer rezultatov procesov ni mogoče zlahka ali ekonomično dokumentirati s poznejšim nadzorom, pregledom in preskušanjem. To vključuje procesne spremenljivke, ki vplivajo na primernost za predvideni namen in zlasti na varnost izdelka.
OPOMBA 1: Ta mednarodni standard temelji na seznamih procesnih spremenljivk, navedenih v mednarodnih
standardih za specifikacijo varilnih postopkov, zlasti (vendar ne izključno) v skupini standardov ISO 15609.
V prihodnjih revizijah teh mednarodnih standardov so lahko dodani ali izbrisani parametri, ki jih je treba določiti.
V dodatku A so podane dodatne smernice glede zahtev za umerjanje, preverjanje in validacijo kot del preskušanja ustreznosti opreme, ki se uporablja za varjenje oz. sorodne procese.
Zahteve za umerjanje, preverjanje in validacijo kot del pregleda, preskušanja, neporušitvenega preskušanja
ali merjenja končnih varjenih izdelkov, ki se izvede za potrditev skladnosti izdelka, niso zajete v tem mednarodnem standardu.
Ta mednarodni standard se omejuje na umerjanje, preverjanje in validacijo opreme po namestitvi, kot del dejavnosti v delavnicah in na mestu uporabe za namene vzdrževanja in/ali
delovanja.
Treba je poudariti, da ta mednarodni standard ne zajema proizvodnje in namestitve opreme za varjenje. Zahteve za novo opremo so ustrezno navedene v direktivah in kodah (standardih) za izdelke.
Dodatek C vsebuje informacije o tem, ali so v dejavnosti umerjanja, preverjanja in validacije vpletene druge osebe.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 17662:2016
01-julij-2016
1DGRPHãþD
SIST EN ISO 17662:2005
9DUMHQMH8PHUMDQMHSUHYHUMDQMHLQYDOLGDFLMDRSUHPH]DYDUMHQMHYNOMXþQRV
SRPRåQLPLGHMDYQRVWPL ,62
Welding - Calibration, verification and validation of equipment used for welding, including
ancillary activities (ISO 17662:2016)
Schweißen - Kalibrierung, Verifizierung und Validierung von Einrichtungen einschließlich
ergänzender Tätigkeiten, die beim Schweißen verwendet werden (ISO 17662:2016)
Soudage - Étalonnage, vérification et validation du matériel utilisé pour le soudage, y
compris pour les procédés connexes (ISO 17662:2016)
Ta slovenski standard je istoveten z: EN ISO 17662:2016
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN ISO 17662:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 17662:2016
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SIST EN ISO 17662:2016
EN ISO 17662
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 25.160.30 Supersedes EN ISO 17662:2005
English Version
Welding - Calibration, verification and validation of
equipment used for welding, including ancillary activities
(ISO 17662:2016)
Soudage - Étalonnage, vérification et validation du Schweißen - Kalibrierung, Verifizierung und
matériel utilisé pour le soudage, y compris pour les Validierung von Einrichtungen einschließlich
procédés connexes (ISO 17662:2016) ergänzender Tätigkeiten, die beim Schweißen
verwendet werden (ISO 17662:2016)
This European Standard was approved by CEN on 23 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 17662:2016 E
worldwide for CEN national Members.
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SIST EN ISO 17662:2016
EN ISO 17662:2016 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 17662:2016
EN ISO 17662:2016 (E)
European foreword
This document (EN ISO 17662:2016) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding” 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 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 17662:2005.
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 17662:2016 has been approved by CEN as EN ISO 17662:2016 without any modification.
3
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SIST EN ISO 17662:2016
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SIST EN ISO 17662:2016
INTERNATIONAL ISO
STANDARD 17662
Second edition
2016-03-01
Welding — Calibration, verification
and validation of equipment used for
welding, including ancillary activities
Soudage — Étalonnage, vérification et validation du matériel utilisé
pour le soudage, y compris pour les procédés connexes
Reference number
ISO 17662:2016(E)
©
ISO 2016
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SIST EN ISO 17662:2016
ISO 17662:2016(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 17662:2016
ISO 17662:2016(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General requirements . 3
4.1 General . 3
4.2 Frequency . 4
4.3 Requirements . 4
4.4 Process data . 5
4.5 Material properties . 5
5 Process data common to more than one welding/brazing process .5
5.1 Process data common to all welding/brazing processes . 5
5.2 Requirements specific to several welding/brazing processes . 7
5.3 Requirements specific to arc welding (group 1). 8
6 Metal arc welding without gas protection (group 11) . 9
7 Plasma arc welding (group 15) .10
8 Resistance welding (groups 21, 22, 23, 24, and 25).10
9 Gas welding (group 3) .11
10 Friction welding (group 42).12
11 Laser beam welding (group 52).12
12 Electron beam welding (group 51) .14
13 Stud welding (group 78) .15
14 Brazing (group 9) .16
14.1 General .16
14.2 Manual and mechanized flame brazing (group 912) .17
14.3 Induction brazing (group 916) .17
14.4 Resistance brazing (group 918) .17
14.5 Furnace brazing in protective atmosphere (group 921) .18
14.6 Vacuum brazing (group 922) .19
14.7 Furnace brazing in open atmosphere (group 921) .20
14.8 Dip-bath brazing (group 923), salt-bath brazing (group 924) and flux-bath brazing
(group 925) .21
14.9 Infrared brazing (group 941) .22
15 Preheat and/or post weld heat treatment .22
15.1 Preheat .22
15.2 Post weld heat treatment .23
16 Post weld cleaning .24
17 Flame cutting (group 81) and other ancillary processes .24
Annex A (informative) Details for stud welding .25
Annex B (informative) Acceptance testing of equipment.26
Annex C (informative) Parties involved .27
Bibliography .28
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SIST EN ISO 17662:2016
ISO 17662:2016(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 44, Welding and allied processes, Subcommittee
SC 10, Quality management in the field of welding.
This second edition cancels and replaces the first edition (ISO 17662:2005), which has been technically
revised.
Requests for official interpretations of any aspect of this International Standard 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.
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SIST EN ISO 17662:2016
INTERNATIONAL STANDARD ISO 17662:2016(E)
Welding — Calibration, verification and validation of
equipment used for welding, including ancillary activities
1 Scope
This International Standard specifies requirements for calibration, verification and validation of
equipment used for
— control of process variables during fabrication, and
— control of the properties of equipment used for welding or welding allied processes
where the resulting output cannot be readily or economically documented by subsequent monitoring,
inspection and testing. This involves process variables influencing the fitness-for-purpose and in
particular the safety of the fabricated product.
NOTE 1 This International Standard is based on the lists of process variables stated in International
Standards for specification of welding procedures, in particular, but not exclusively in the ISO 15609- series.
Future revisions of these International Standards can result in addition or deletion of parameters considered
necessary to specify.
Some guidance is, in addition, given in Annex B as regards requirements for calibration; verification
and validation as part of acceptance testing of equipment used for welding or allied processes.
Requirements to calibrate, verify and validate as part of inspection, testing, non-destructive testing
or measuring of final welded products performed in order to verify confirm product compliance are
outside the scope of the present International Standard.
The subject of this International Standard is limited to calibration, verification and validation of
equipment after installation, as part of the workshops’ and site operations for maintenance and/or
operation.
It needs to be stressed that this International Standard has nothing to do with manufacture and
installation of equipment for welding. Requirements for new equipment are formulated in directives
and product codes (standards), as necessary.
Annex C provides information when other parties are involved in calibration, verification and validation
activities.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for 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 669, Resistance welding — Resistance welding equipment — Mechanical and electrical requirements
ISO 5171, Gas welding equipment — Pressure gauges used in welding, cutting and allied processes
ISO 5172:2006, Gas welding equipment — Blowpipes for gas welding, heating and cutting — Specifications
and tests
ISO 5826, Resistance welding equipment — Transformers — General specifications applicable to all
transformers
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SIST EN ISO 17662:2016
ISO 17662:2016(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
accuracy class
class of measuring instruments or measuring systems that meets stated metrological requirements
that are intended to keep measurement errors or instrumental measurement uncertainties within
specified limits under specified operating conditions
[SOURCE: ISO/IEC Guide 99:2007, 4.25]
3.2
accuracy of measurement
closeness of agreement between a measured quantity value and a true quantity value of a measurand
Note 1 to entry: The term measurand is defined by the VIM (ISO/IEC Guide 99:2007, 2.3) as a “quantity intended
to be measured”.
[SOURCE: ISO/IEC Guide 99:2007, 2.13, modified — Note 1 to entry has been added.]
3.3
calibration
set of operations that establish, under specified conditions, the relationship between values of
quantities indicated by a measuring instrument or measuring system, or values represented by a
material measure or a reference material, and the corresponding values realized by standards
3.4
measurement
process of experimentally obtaining one or more quantity values that can reasonably be attributed to a
quantity
[SOURCE: ISO/IEC Guide 99:2007, 2.1]
3.5
measuring instrument
device used for making measurements, alone or in conjunction with one or more supplementary devices
[SOURCE: ISO/IEC Guide 99:2007, 3.1]
3.6
material measure
device intended to reproduce or supply, in a permanent manner during its use, one or more known
values of a given quantity
3.7
measuring system
set of one or more measuring instruments and often other devices, including any reagent and supply,
assembled and adopted to give information used to generate measured quantity values within specified
intervals for quantities of specified kinds
[SOURCE: ISO/IEC Guide 99:2007, 3.2]
3.8
repeatability (of results of measurements)
closeness of the agreement between the results of successive measurements of the same measurement
carried out under the same conditions of measurement
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SIST EN ISO 17662:2016
ISO 17662:2016(E)
3.9
traceability
property of the result of a measurement or the value of a standard whereby it can be related to stated
references, usually national or international standards, through an unbroken chain of comparisons all
having stated uncertainties
3.10
validation
confirmation through the provision of objective evidence that the requirements for a specific intended
use (e.g. client specification) or application (e.g. product standard) have been fulfilled
3.11
verification
confirmation through the provision of objective evidence that specified requirements have been
fulfilled
Note 1 to entry: Verification is also interpreted as a confirmation that an available process achieved an expected
level of success.
4 General requirements
4.1 General
Measuring, inspection and test equipment are used for many purposes and as part of many work
operations during welding fabrication. However, the purposes can be grouped as follows:
1) demonstration of conformance of product to specified requirements;
2) control of processes where the resulting output cannot be readily or economically verified by
subsequent monitoring, inspection and testing;
3) general process control.
Measuring, inspection and test equipment used for demonstration of conformance of product to
specified requirements (1) should be properly calibrated, verified, or validated. This is, for example,
required in ISO 9001. Many of the procedures used for demonstration of conformance inspection are
covered by standards, which typically include provisions for calibration, verification, or validation.
This is, for example, the case for standards for non-destructive testing and/or destructive testing of
welds. Further, requirements for documentation of such quality characteristics (e.g. non-destructive
testing) are stated in application standards and/or contracts. Calibration, verification and validation
of measuring devices used for this category of application are not covered by this standard, apart from
a few comments on welding inspection and visual examination. The relevant standards for inspection
and testing shall be consulted.
However, some quality characteristics (also related to safety) cannot be inspected or tested on the
finished structure or product. This is, for example, the case for the materials properties of weld metals
and to the heat-affected zones adjacent to welds. Such quality characteristics have to be documented
indirectly by proper documentation of the fabrication process (2). The guidance given in this standard
is limited mainly to calibration, verification and validation of measuring devices used for such indirect
documentation of quality characteristics, influenced by welding. The measuring, inspection and test
equipment can be separate measuring instruments or built-in instruments in, for example, the power
sources used for welding.
Measuring, inspection and test equipment used for general process control may also have to be
1)
calibrated, verified or validated (3). This is, for example, recommended in ISO 9004 . However,
specifications of such requirements are left entirely to the discretion of the manufacturer, the
requirements cannot be standardized and they are not covered by the present International Standard.
1) It should be noted that ISO 9004 is not intended for certification, regulatory or contractual use.
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SIST EN ISO 17662:2016
ISO 17662:2016(E)
A key issue of the International Standard is discussions of the influence of various process variables
on the resulting output and in particular of the possibilities of verification of the output by subsequent
monitoring, inspection and testing. The distinction between process variables in group (2) and group
(3) is not always easy but essential for the interpretation of contractual and/or legal requirements.
The main basis for selection of the relevant variables is the standards for specification of welding
procedures.
The specific requirements for calibration, verification and validation of a particular instrument shall be
derived from the required performance and shall be compatible with the permissible range as specified
in the welding procedure specification (WPS) for the variable(s) in question. Many types of instruments
used for control of welding such as ammeters, voltmeters, thermocouples, stop-watches etc. are also
used for non-welding purposes. It should be noted that the requirements to accuracy, when used for
welding purposes might be less stringent than for other applications of the instruments. “Normal”
(standardized) procedures for calibration, verification and validation of the instruments can be too
stringent and costly, if applied for welding purposes.
The formal requirements to calibration, verification and validation as regards control of welding and
allied processes are specified in the ISO 3834- series and the ISO 14554- series. Some more specific
supplementary requirements can, however, be found in structural codes and/or as contractual
requirements.
4.2 Frequency
When a need for calibration, verification, or validation of equipment has been identified then calibration,
verification, or validation shall be carried out once a year, unless otherwise specified. Where there
is a proven record of repeatability and reliability the frequency of calibration, verification and
validation can be reduced. It can, however, be necessary to re-calibrate, re-verify or re-validate at more
frequent intervals, depending upon the recommendation of the manufacturer of the instrument, the
requirements of the user, or where there is reason to believe that the performances of the equipment
have deteriorated. Equipment shall be isolated and calibration, verification, or validation carried out
before the equipment is put back in use after the following cases:
— whenever there are indications that an instrument does not register properly;
— whenever the equipment has been visibly damaged and the damage can have influenced the function
of one or more instruments;
— whenever the equipment has been misused, subject to severe stress (overloads, etc.), or subject to
any other event which can have resulted in damage to one or more instrument;
— whenever the equipment has been rebuilt or repaired.
4.3 Requirements
Calibration, verification and validation shall, in principle, be carried out for all the instruments used
for control of the welding process variables specified in the welding/brazing procedure specification.
International Standards for specification of welding/brazing procedures provide comprehensive lists
of variables, but not all variables are essential for all applications. The following are some guidelines on
relevant requirements for all common welding/brazing processes.
Calibration, verification and validation may be omitted entirely in the following cases.
a) When verification of the process is not required
Calibration, verification and validation may be omitted for all processes where there is no legal or
contractual requirement for verification or validation of the process.
NOTE 1 This is usually the case for processes such as flame or plasma cutting and air arc gouging.
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SIST EN ISO 17662:2016
ISO 17662:2016(E)
b) Mass production
Calibration, verification and validation may be omitted, provided all the following conditions are
fulfilled:
— the production is controlled by pre-production testing, followed by testing of samples from the
actual production at regular intervals;
— the control is supported by an adequate system for statistical quality control;
— the process is reasonably stable during the interval between testing of samples;
— pre-production testing and sampling are performed separately for each production line (welding cell).
c) Series and single piece production
Calibration, verification and validation may be omitted, provided all the following conditions are
fulfilled:
— the procedures are approved by proced
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Questions, Comments and Discussion
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