Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array technology (ISO 13588:2019)

This document specifies the application of the phased array technology for the semi- or fully automated ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm. It applies to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld and the parent material are low-alloy and/or fine grained steel. For the testing of welds in other steel materials this document gives guidance. For coarse-grained or austenitic steels, ISO 22825 applies in addition to this document.
This document provides guidance on the specific capabilities and limitations of the phased array technology for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. Phased array technology can be used as a stand-alone technology or in combination with other non-destructive testing (NDT) methods or techniques, for manufacturing inspection, pre-service and for in-service inspection.
This document specifies four testing levels, each corresponding to a different probability of detection of imperfections.
This document permits assessment of discontinuities for acceptance purposes based either on amplitude (equivalent reflector size) and length, or on height and length.
This document does not include acceptance levels for discontinuities.
This document is not applicable for automated testing of welds during the production of steel products covered by ISO 10893-8, ISO 10893-11 and ISO 3183.

Zerstörungsfreie Prüfung von Schweißverbindungen - Ultraschallprüfung - Anwendung von automatisierter phasengesteuerter Array-Technologie (ISO 13588:2019)

Dieses Dokument legt die Anwendung der phasengesteuerten Array-Technik bei der halb- oder vollautomatisierten Ultraschallprüfung von Schmelzschweißverbindungen in metallischen Werkstoffen mit Dicken von mindestens 6 mm fest. Es gilt für durchgeschweißte Verbindungen mit einfacher Geometrie in Platten, Rohren und Behältern, bei denen sowohl der Werkstoff der Schweißnaht als auch der Grundwerk-stoff niedrig legierter und/oder feinkörniger Stahl sind. Für die Prüfung von Schweißverbindungen in anderen Stahlwerkstoffen bietet dieses Dokument Orientierungshilfe. Für grobkörnige oder austenitische Stähle gilt ISO 22825 zusätzlich zu diesem Dokument.
Dieses Dokument bietet eine Anleitung für die besonderen Fähigkeiten und Grenzen der phasengesteuerten Array-Technik beim Auffinden, bei der Ortung, der Größenbestimmung und der Charakterisierung von Inhomogenitäten in Schmelzschweißverbindungen. Die phasengesteuerte Array-Technik kann eigenständig oder in Verbindung mit anderen Verfahren oder Techniken der zerstörungsfreien Prüfung angewendet werden, sowohl für Prüfungen bei der Herstellung, vor der Inbetriebnahme und für Prüfungen während des Betriebs.
In diesem Dokument sind vier Prüfklassen für unterschiedliche Nachweiswahrscheinlichkeiten von Inhomogenitäten festgelegt.
Dieses Dokument erlaubt die Beurteilung von Inhomogenitäten zur Bestimmung der Zulässigkeit entweder anhand ihrer Amplitude (Ersatzreflektorgröße) und Länge oder anhand ihrer Tiefenausdehnung und Länge.
Dieses Dokument legt keine Zulässigkeitsgrenzen für die Inhomogenitäten fest.
Dieses Dokument gilt nicht für die automatisierte Prüfung von Schweißnähten bei der Herstellung von Stahlerzeugnissen nach ISO 10893 8, ISO 10893 11 und ISO 3183.

Essais non destructifs des assemblages soudés - Contrôle par ultrasons - Utilisation de la technique multi-éléments automatisés (ISO 13588:2019)

Le présent document spécifie l'application de la technique multi-éléments pour le contrôle par ultrasons semi-automatisé ou entièrement automatisé des assemblages soudés par fusion de matériaux métalliques d'une épaisseur minimale de 6 mm. Il s'applique à des assemblages soudés à pleine pénétration de géométrie simple sur plaques, tubes et récipients, dans lesquels le métal de base et le métal fondu sont tous les deux constitués d'acier faiblement allié et/ou d'acier à grain fin. Le présent document donne des indications pour les contrôle de soudures dans d'autres matériaux en acier. Pour les aciers à grains grossiers ou austénitiques, la norme ISO 22825 s'applique, en plus du présent document.
Le présent document fournit des lignes directrices sur les possibilités et les limitations spécifiques de la technique multi-éléments pour la détection, la localisation, le dimensionnement et la caractérisation des discontinuités dans les assemblages soudés par fusion. La technique multi-éléments peut être utilisée de manière autonome ou en combinaison avec d'autres méthodes ou techniques de contrôle non-destructif, aussi bien pour le contrôle de fabrication avant service que pour le contrôle en cours de service.
Le présent document spécifie quatre niveaux de contrôle, chacun correspondant à une probabilité différente de détection des imperfections.
Le présent document permet l'évaluation des indications à des fins d'acceptation en se basant sur l'amplitude (taille équivalente du réflecteur) et la longueur ou sur la hauteur et la longueur.
Le présent document ne comporte pas de niveaux d'acceptation pour les discontinuités.
Le présent document ne s'applique pas pour le contrôle automatisé des soudures pendant la production de produits en aciers couvert par l'ISO 108938, l'ISO 1089311 et par l'ISO 3183.

Neporušitveno preskušanje zvarnih spojev - Ultrazvočno preskušanje - Uporaba avtomatske tehnike s faznim krmiljenjem (FA-tehnika) (ISO 13588:2019)

Ta dokument določa uporabo tehnike s faznim krmiljenjem za polavtomatsko ali avtomatsko ultrazvočno preskušanje talilno zvarjenih zvarov v kovinskih materialih z debelino najmanj 6 mm. Uporablja se za zvarne spoje s popolno penetracijo na ploščah, ceveh in posodah s preprosto geometrijo, kjer sta zvar in matični material iz malolegiranega in/ali drobnozrnatega jekla. Ta dokument daje smernice za preskušanje zvarov v drugih jeklenih materialih. Za grobozrnata ali avstenitna jekla se poleg tega dokumenta uporablja tudi ISO 22825.
Ta dokument podaja smernice o specifičnih zmogljivostih in omejitvah tehnike s faznim krmiljenjem za zaznavanje, ugotavljanje lokacije in velikosti ter karakterizacijo prekinjenosti talilno zvarjenih zvarov. Tehniko s faznim krmiljenjem je mogoče uporabiti kot samostojno metodo ali v kombinaciji z drugimi metodami ali tehnikami neporušitvenega preskušanja za pregled proizvodnje, pregled pred začetkom uporabe ali pregled med uporabo.
Ta dokument določa štiri ravni preskušanja, pri čemer vsaka označuje drugačno verjetnost zaznavanja nepravilnosti.
Dokument omogoča ocenjevanje nehomogenosti za namene sprejemljivosti na podlagi amplitude (ekvivalentna reflektorska velikost) in dolžine ali višine in dolžine.
Dokument ne vključuje ravni sprejemljivosti za nehomogenosti.
Dokument se ne uporablja za avtomatizirano preskušanje zvarov med proizvodnjo jeklenih izdelkov, zajetih v standardih ISO 10893-8, ISO 10893-11 in ISO 3183.

General Information

Status
Published
Publication Date
05-Mar-2019
Technical Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
06-Mar-2019
Completion Date
06-Mar-2019

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SLOVENSKI STANDARD
SIST EN ISO 13588:2019
01-september-2019
Nadomešča:
SIST EN ISO 13588:2013
Neporušitveno preskušanje zvarnih spojev - Ultrazvočno preskušanje - Uporaba
avtomatske tehnike s faznim krmiljenjem (FA-tehnika) (ISO 13588:2019)

Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array

technology (ISO 13588:2019)

Zerstörungsfreie Prüfung von Schweißverbindungen - Ultraschallprüfung - Anwendung

von automatisierter phasengesteuerter Array-Technologie (ISO 13588:2019)

Contrôle non destructif des assemblages soudés - Contrôle par ultrasons - Utilisation de

la technique multi-éléments automatisés (ISO 13588:2019)
Ta slovenski standard je istoveten z: EN ISO 13588:2019
ICS:
25.160.40 Varjeni spoji in vari Welded joints and welds
SIST EN ISO 13588:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 13588:2019
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SIST EN ISO 13588:2019
EN ISO 13588
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 25.160.40 Supersedes EN ISO 13588:2012
English Version
Non-destructive testing of welds - Ultrasonic testing - Use
of automated phased array technology (ISO 13588:2019)

Contrôle non destructif des assemblages soudés - Zerstörungsfreie Prüfung von Schweißverbindungen -

Contrôle par ultrasons - Utilisation de la technique Ultraschallprüfung - Anwendung von automatisierter

multi-éléments automatisés (ISO 13588:2019) phasengesteuerter Array-Technologie (ISO

13588:2019)
This European Standard was approved by CEN on 9 February 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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 Ref. No. EN ISO 13588:2019 E

worldwide for CEN national Members.
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SIST EN ISO 13588:2019
EN ISO 13588:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Endorsement notice ..................................................................................................................................................... 3

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SIST EN ISO 13588:2019
EN ISO 13588:2019 (E)
European foreword

This document (EN ISO 13588:2019) 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 September 2019, and conflicting national standards

shall be withdrawn at the latest by September 2019.

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 13588:2012.

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 13588:2019 has been approved by CEN as EN ISO 13588:2019 without any modification.

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SIST EN ISO 13588:2019
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SIST EN ISO 13588:2019
INTERNATIONAL ISO
STANDARD 13588
Second edition
2019-02
Non-destructive testing of welds —
Ultrasonic testing — Use of automated
phased array technology
Essais non destructifs des assemblages soudés — Contrôle par
ultrasons — Utilisation de la technique multi-éléments automatisés
Reference number
ISO 13588:2019(E)
ISO 2019
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SIST EN ISO 13588:2019
ISO 13588:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 13588:2019
ISO 13588:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Testing levels ............................................................................................................................................................................................................ 2

5 Information required prior to testing ............................................................................................................................................ 4

5.1 Items to be defined prior to procedure development ........................................................................................... 4

5.2 Specific information required by the operator before testing ....................................................................... 4

5.3 Written test procedure ..................................................................................................................................................................... 5

6 Requirements for personnel and test equipment ............................................................................................................. 5

6.1 Personnel qualifications ................................................................................................................................................................. 5

6.2 Test equipment ....................................................................................................................................................................................... 6

6.2.1 General...................................................................................................................................................................................... 6

6.2.2 Ultrasonic instrument ................................................................................................................................................. 6

6.2.3 Ultrasonic probes ............................................................................................................................................................ 6

6.2.4 Scanning mechanisms ................................................................................................................................................. 6

7 Preparation for testing ................................................................................................................................................................................... 6

7.1 Volume to be tested ............................................................................................................................................................................. 6

7.2 Verification of the test setup ....................................................................................................................................................... 6

7.3 Scan increment setting ..................................................................................................................................................................... 6

7.4 Geometry considerations ............................................................................................................................................................... 7

7.5 Preparation of scanning surfaces ............................................................................................................................................ 7

7.6 Temperature .............................................................................................................................................................................................. 7

7.7 Couplant ........................................................................................................................................................................................................ 7

8 Testing of base material ................................................................................................................................................................................ 7

9 Range and sensitivity settings ................................................................................................................................................................ 8

9.1 Settings .......................................................................................................................................................................................................... 8

9.1.1 General...................................................................................................................................................................................... 8

9.1.2 Pulse-echo time window ........................................................................................................................................... 8

9.1.3 Pulse-echo sensitivity settings ............................................................................................................................. 8

9.1.4 TOFD settings ..................................................................................................................................................................... 8

9.2 Checking of the settings .................................................................................................................................................................. 8

9.3 Reference blocks .................................................................................................................................................................................... 9

9.3.1 General...................................................................................................................................................................................... 9

9.3.2 Material .................................................................................................................................................................................... 9

9.3.3 Dimensions and shape ................................................................................................................................................ 9

9.3.4 Reference reflectors ...................................................................................................................................................... 9

10 Equipment checks ............................................................................................................................................................................................10

11 Procedure qualification .............................................................................................................................................................................10

12 Weld testing ............................................................................................................................................................................................................10

13 Data storage ............................................................................................................................................................................................................11

14 Interpretation and analysis of phased array data ..........................................................................................................11

14.1 General ........................................................................................................................................................................................................11

14.2 Assessing the quality of the phased array data ........................................................................................................11

14.3 Identification of relevant indications ...............................................................................................................................11

14.4 Classification of relevant indications ................................................................................................................................11

14.5 Determination of location ..........................................................................................................................................................12

14.6 Determination of length and height ...................................................................................................................................12

14.6.1 General...................................................................................................................................................................................12

© ISO 2019 – All rights reserved iii
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SIST EN ISO 13588:2019
ISO 13588:2019(E)

14.6.2 Determination of length .........................................................................................................................................12

14.6.3 Determination of height .........................................................................................................................................12

14.7 Evaluation against acceptance criteria ............................................................................................................................13

15 Test report ................................................................................................................................................................................................................13

Annex A (informative) Typical reference blocks and reference reflectors ...............................................................15

Annex B (informative) Illustrations of possible signals to be used ...................................................................................20

Bibliography .............................................................................................................................................................................................................................24

iv © ISO 2019 – All rights reserved
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SIST EN ISO 13588:2019
ISO 13588:2019(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 5, Testing and inspection of welds.

Any feedback, question or request for official interpretation related to any aspect of this document

should be directed to the Secretariat of ISO/TC 44/SC 5 via your national standards body. A complete

listing of these bodies can be found at www .iso .org/members .html. Official interpretations, 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 13588:2012), which has been technically

revised. The main changes compared to the previous edition are as follows:
— Clauses 2 and 3 have been updated;
— a method of length and height measurement has been added;
— new Annex B has been added;
— the document has been editorially updated.
© ISO 2019 – All rights reserved v
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SIST EN ISO 13588:2019
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SIST EN ISO 13588:2019
INTERNATIONAL STANDARD ISO 13588:2019(E)
Non-destructive testing of welds — Ultrasonic testing —
Use of automated phased array technology
1 Scope

This document specifies the application of the phased array technology for the semi- or fully automated

ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm. It applies

to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld

and the parent material are low-alloy and/or fine grained steel. For the testing of welds in other steel

materials this document gives guidance. For coarse-grained or austenitic steels, ISO 22825 applies in

addition to this document.

This document provides guidance on the specific capabilities and limitations of the phased array

technology for the detection, location, sizing and characterization of discontinuities in fusion-welded

joints. Phased array technology can be used as a stand-alone technology or in combination with other

non-destructive testing (NDT) methods or techniques, for manufacturing inspection, pre-service and

for in-service inspection.

This document specifies four testing levels, each corresponding to a different probability of detection of

imperfections.

This document permits assessment of discontinuities for acceptance purposes based either on

amplitude (equivalent reflector size) and length, or on height and length.
This document does not include acceptance levels for discontinuities.

This document is not applicable for automated testing of welds during the production of steel products

covered by ISO 10893-8, ISO 10893-11 and ISO 3183.
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 5577, Non-destructive testing — Ultrasonic testing — Vocabulary

ISO 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding

excluded) — Quality levels for imperfections

ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel

ISO 17640, Non-destructive testing of welds — Ultrasonic testing — Techniques, testing levels, and

assessment

ISO 10863, Non-destructive testing of welds — Ultrasonic testing — Use of time-of-flight diffraction

technique (TOFD)

ISO 18563-1, Non-destructive testing — Characterization and verification of ultrasonic phased array

equipment – Part 1: Instruments

ISO 18563-2, Non-destructive testing — Characterization and verification of ultrasonic phased array

equipment — Part 2: Probes

ISO 18563-3, Non-destructive testing — Characterization and verification of ultrasonic phased array

equipment — Part 3: Combined systems
© ISO 2019 – All rights reserved 1
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SIST EN ISO 13588:2019
ISO 13588:2019(E)

ISO 19285, Non-destructive testing of welds — Phased array ultrasonic testing (PAUT) — Acceptance levels

ISO 22825, Non-destructive testing of welds — Ultrasonic testing — Testing of welds in austenitic steels

and nickel-based alloys

EN 16018, Non-destructive testing — Terminology — Terms used in ultrasonic testing with phased arrays

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5577, EN 16018 and the

following 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/
3.1
phased array image

one- or two-dimensional display, constructed from the collected information of phased array operation

3.2
indication
phased array indication

pattern or disturbance in the phased array image (3.1) which can need further evaluation

3.3
phased array setup

probe arrangement defined by probe characteristics (e.g. frequency, probe element size, beam angle,

wave mode), probe position (3.4), and the number of probes
3.4
probe position
distance between the front of the wedge and the weld centre line
3.5
scan increment

distance between successive data collection points in the direction of scanning (mechanically or

electronically)
3.6
skewed scan
scan performed with a skewed angle

Note 1 to entry: The skewed angle can be achieved electronically or by means of probe orientation.

3.7
mode
phased array mode

combination of ultrasonic beams created by phased array technology, e.g. fixed angle, E-scan, S-scan

4 Testing levels

Quality requirements for welded joints are mainly associated with the material, welding process and

service conditions. To comply with all of these requirements, this document specifies four testing levels

(A, B, C and D).
2 © ISO 2019 – All rights reserved
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SIST EN ISO 13588:2019
ISO 13588:2019(E)

From testing level A to testing level C, an increasing probability of detection is achieved by an increasing

testing coverage, e.g. number of incidences, combining techniques.

Testing level D may be agreed for special applications using a written procedure which shall take

into account the general requirements of this document. This includes tests of metals other than

ferritic steel, tests on partial penetration welds, tests with automated equipment and tests at object

temperatures outside the range. For coarse-grained or austenitic steels, ISO 22825 shall also be used.

In general, the testing levels are related to quality levels (e.g. according to ISO 5817). The appropriate

testing level can be specified by standards for the testing of welds (e.g. ISO 17635), by product standards

or by other documents. When ISO 17635 is specified, the testing levels in relation to ISO 5817 as given

in Table 1 shall be used.
Table 1 — Quality levels of ISO 5817 and corresponding testing levels
Testing level Quality level in ISO 5817
A C, D
B B
C by agreement
D special application

Table 2 shows the minimum requirements and in all cases, as described in 7.2, the setup shall be verified

with a reference block. In cases where scanning is performed from one face (excluding TOFD), half and

full skip shall be used and stored; if scanning is performed from both faces, half skip is sufficient.

If diffraction signals are detected they may be used for sizing.

If the evaluation of the discontinuities is based on amplitude only, the deviation of the beam direction

from the normal to the weld bevel shall not exceed 6°. If this is not possible because of the geometry of

the test object (e.g. weld cap, narrow gap weld), the scan plan shall describe the corrective measures

and explain how these areas to be tested shall be covered with enough sensitivity

Table 2 — Description of testing levels
Testing levels
A B C
Mode Example of sketches
Reference blocks (see Annex A)
Block A Block B Block C
Test set-up
Fixed angles at fixed
probe position to Not suitable as single
Two sides Two sides
weld technique
(line scans)
Fixed angles with ras-
One side One side One side
ter scanning
E-scan at fixed probe
Two sides with two an-
position One side Two sides
gles
(line scan)
S-scan at fixed probe Two sides or
Two sides or two probe
position to weld One side two probe posi-
positions
(line scan) tions
© ISO 2019 – All rights reserved 3
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SIST EN ISO 13588:2019
ISO 13588:2019(E)
Table 2 (continued)
Testing levels
A B C
Mode Example of sketches
Reference blocks (see Annex A)
Block A Block B Block C
S-scan raster Not recommended One side
TOFD generated with Not recommended, TOFD testing in
One setup
phased array accordance with ISO 10863
Skewed scan If required by specification

For testing level C, at least two different test setups from this table shall be combined; at least one of them

shall be S-scan or TOFD.

If detection of transverse discontinuities is required by specification, a suitable additional test setup shall be

applied. Skewed probe or electronically skewed beam can be used.
At least 10° difference between angles.
5 Information required prior to testing
5.1 Items to be defined prior to procedure development
Information on the following items is required:
a) purpose and extent of testing;
b) testing levels;
c) acceptance criteria;
d) specification of reference blocks;
e) manufacturing or operation stage at which the testing is to be carried out;
f) weld details and information on the size of the heat-affected zone;
g) requirements for access and surface conditions and temperature;
h) personnel qualifications;
i) reporting requirements.
5.2 Specific information required by the operator before testing

Before any testing of a welded joint can begin, the operator shall have access to all the information as

specified in 5.1 together with the following additional information:
a) written test procedure;
b) type(s) of parent material and product form (i.e. cast, forged, rolled);
c) joint preparation and dimensions;
d) welding instruction or relevant information on the welding process;
4 © ISO 2019 – All rights reserved
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SIST EN ISO 13588:2019
ISO 135
...

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