SIST EN ISO 13588:2013
(Main)Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array technology (ISO 13588:2012)
Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array technology (ISO 13588:2012)
This International Standard 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 parent material are low-alloyed carbon steel. Where material-dependent ultrasonic parameters are specified in this International Standard, they are based on steels having an ultrasonic sound velocity of (5 920 ± 50) m/s for longitudinal waves, and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when examining materials with a different velocity. This International Standard provides guidance on the specific capabilities and limitations of 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 International Standard specifies four testing levels, each corresponding to a different probability of detection of imperfections. This International Standard permits assessment of indications for acceptance purposes based on either amplitude (equivalent reflector size) and length or height and length.
Zerstörungsfreie Prüfung von Schweißverbindungen - Ultraschallprüfung - Verwendung von (halb-)automatisierter phasengesteuerter Array-Technologie (ISO 13588:2012)
Dieses Dokument legt die Anwendung der phasengesteuerten Array-Technik bei der halb- oder vollautomatischen
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 Grundwerkstoff ein niedrig
legierter Kohlenstoffstahl ist.
Sofern in dieser Norm werkstoffabhängige Ultraschallparameter festgelegt sind, gelten sie für Stähle mit einer
Schallgeschwindigkeit von (5 920 ± 50) m/s für Longitudinalwellen und (3 255 ± 30) m/s für Transversalwellen.
Dies ist bei der Prüfung von Werkstoffen mit einer anderen Schallgeschwindigkeit zu berücksichtigen.
Das vorliegende Dokument bietet eine Anleitung für die besonderen Fähigkeiten und Grenzen der phasengesteuerten
Array-Technik beim Auffinden, bei der Fehlerortung, Größenbestimmung und Charakterisierung
von Unregelmäßigkeiten in Schmelzschweißverbindungen. Die phasengesteuerte Array-Technik darf 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
Betriebes.
In diesem Dokument sind vier Prüfklassen für unterschiedliche Nachweiswahrscheinlichkeiten von Unregelmäßigkeiten
festgelegt
Dieses Dokument erlaubt die Beurteilung der Anzeigen zur Bestimmung der Zulässigkeit sowohl mittels ihrer
Amplitude und Länge als auch mittels ihrer Tiefe und Länge.
In diesem Dokument werden keine Zulässigkeitsgrenzen für die Unregelmäßigkeiten festgelegt.
Contrôle non destructif des assemblages soudés - Contrôle par ultrasons - Utilisation de la technique multi-éléments automatisés (ISO 13588:2012)
Neporušitveno preskušanje zvarnih spojev - Ultrazvočno preskušanje - Uporaba polavtomatske in avtomatske tehnike s faznim krmiljenjem (FA-tehnika) (ISO 13588:2012)
Ta mednarodni standard 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 malo legiranega ogljikovega jekla. Kadar so v tem mednarodnem standardu določeni od materiala odvisni ultrazvočni parametri, temeljijo na jeklih z ultrazvočno hitrostjo (5920 ± 50) m/s za vzdolžne valove in (3255 ± 30) m/s za prečne valove. To je treba upoštevati pri preučevanju materialov z različno hitrostjo. Ta dokument podaja vodilo o specifičnih zmogljivostih in omejitvah tehnike s faznim krmiljenjem za zaznavanje, ugotavljanje lokacije in velikosti ter karakterizacijo prekinjenosti talilno zvarjenih zvarov. Tehnika s faznim krmiljenjem se lahko uporablja kot samostojna metoda ali v kombinaciji z drugimi metodami ali tehnikami neporušitvenega preskušanja za pregled proizvodnje pred začetkom uporabe ali za pregled med uporabo. Ta mednarodni standard določa štiri ravni preskusa, pri čemer vsaka označuje drugačno verjetnost zaznavanja nepravilnosti. Ta mednarodni standard omogoča ocenjevanje navedb za namene sprejemljivosti na podlagi amplitude (ekvivalentna reflektorska velikost) in dolžine ali višine in dolžine.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13588:2013
01-maj-2013
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SRODYWRPDWVNHLQDYWRPDWVNHWHKQLNHVID]QLPNUPLOMHQMHP )$WHKQLND ,62
Non-destructive testing of welds - Ultrasonic testing - Use of automated phased array
technology (ISO 13588:2012)
Zerstörungsfreie Prüfung von Schweißverbindungen - Ultraschallprüfung - Verwendung
von (halb-)automatisierter phasengesteuerter Array-Technologie (ISO 13588:2012)
Contrôle non destructif des assemblages soudés - Contrôle par ultrasons - Utilisation de
la technique multi-éléments automatisés (ISO 13588:2012)
Ta slovenski standard je istoveten z: EN ISO 13588:2012
ICS:
25.160.40 Varjeni spoji in vari Welded joints
SIST EN ISO 13588:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 13588:2013
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SIST EN ISO 13588:2013
EUROPEAN STANDARD
EN ISO 13588
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2012
ICS 25.160.40
English Version
Non-destructive testing of welds - Ultrasonic testing - Use of
automated phased array technology (ISO 13588:2012)
Contrôle non destructif des assemblages soudés - Contrôle Zerstörungsfreie Prüfung von Schweißverbindungen -
par ultrasons - Utilisation de la technique multi-éléments Ultraschallprüfung - Verwendung von (halb-)automatisierter
automatisés (ISO 13588:2012) phasengesteuerter Array-Technologie (ISO 13588:2012)
This European Standard was approved by CEN on 30 September 2012.
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
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13588:2012: E
worldwide for CEN national Members.
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SIST EN ISO 13588:2013
EN ISO 13588:2012 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 13588:2013
EN ISO 13588:2012 (E)
Foreword
This document (EN ISO 13588:2012) has been prepared by Technical Committee CEN/TC 121 “Welding”, the
secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 44 "Welding and allied
processes".
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the
latest by April 2013.
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.
According to the CEN/CENELEC Internal Regulations, the national standards organisations 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.
3
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SIST EN ISO 13588:2013
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SIST EN ISO 13588:2013
INTERNATIONAL ISO
STANDARD 13588
First edition
2012-10-01
Non-destructive testing of welds —
Ultrasonic testing — Use of automated
phased array technology
Contrôle non destructif des assemblages soudés — Contrôle par
ultrasons — Utilisation de la technique multi-éléments automatisés
Reference number
ISO 13588:2012(E)
©
ISO 2012
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
Contents Page
Foreword .iv
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 . 4
6 Requirements for personnel and equipment . 5
6.1 Personnel qualifications . 5
6.2 Equipment . 5
7 Preparation for testing . 5
7.1 Volume to be inspected . 5
7.2 Verification of test set-up . 6
7.3 Scan increment setting . 6
7.4 Geometry considerations . 6
7.5 Preparation of scanning surfaces . 6
7.6 Temperature . 6
7.7 Couplant . 6
8 Testing of base material . 7
9 Range and sensitivity settings . 7
9.1 Settings . 7
9.2 Checking of the settings . 8
9.3 Reference blocks . 8
10 Equipment checks . 9
11 Procedure qualification . 9
12 Weld testing . 9
13 Data storage .10
14 Interpretation and analysis of phased array data .10
14.1 General .10
14.2 Assessing the quality of the phased array data .10
14.3 Identification of relevant indications .10
14.4 Classification of relevant indications .10
14.5 Determination of location and length of an indication . 11
14.6 Indication assessment . 11
14.7 Evaluation against acceptance criteria . 11
15 Test report . 11
Annex A (informative) Typical reference blocks and reference reflectors .13
Bibliography .17
© ISO 2012 – All rights reserved iii
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SIST EN ISO 13588:2013
ISO 13588:2012(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 13588 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO
Technical Committee TC 44, Welding and allied processes, Subcommittee SC 5, Testing and inspection of
welds, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
Requests for official interpretations of any aspect of this International Standard 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.
iv © ISO 2012 – All rights reserved
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SIST EN ISO 13588:2013
INTERNATIONAL STANDARD ISO 13588:2012(E)
Non-destructive testing of welds — Ultrasonic testing — Use
of automated phased array technology
1 Scope
This International Standard 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
parent material are low-alloyed carbon steel.
Where material-dependent ultrasonic parameters are specified in this International Standard, they are based on
steels having an ultrasonic sound velocity of (5 920 ± 50) m/s for longitudinal waves, and (3 255 ± 30) m/s for
transverse waves. It is necessary to take this fact into account when examining materials with a different velocity.
This International Standard provides guidance on the specific capabilities and limitations of 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 International Standard specifies four testing levels, each corresponding to a different probability of
detection of imperfections.
This International Standard permits assessment of indications for acceptance purposes based on either
amplitude (equivalent reflector size) and length or height and length.
This International Standard does not include acceptance levels for discontinuities.
This International Standard is not applicable:
— for coarse-grained metals and austenitic welds;
[3]
— for automated testing of welds during the production of steel products covered by ISO 10893-8,
[4] [1]
ISO 10893-11, and ISO 3183.
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 9712, Non-destructive testing — Qualification and certification of NDT personnel
ISO 10863, Non-destructive testing of welds — Ultrasonic testing — Use of time-of-flight diffraction
technique (TOFD)
ISO 17635, Non-destructive testing of welds — General rules for metallic materials
ISO 17640, Non-destructive testing of welds — Ultrasonic testing — Techniques, testing levels, and assessment
EN 473, Non-destructive testing — Qualification and certification of NDT personnel — General principles
EN 1330-4, Non-destructive testing — Terminology — Part 4: Terms used in ultrasonic testing
EN 16392-1, Non-destructive testing — Characterization and verification of ultrasonic phased array systems —
Part 1: Instruments
© ISO 2012 – All rights reserved 1
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
EN 16392-2, Non-destructive testing — Characterization and verification of ultrasonic phased array systems —
Part 2: Probes
EN 16392-3, Non-destructive testing — Characterization and verification of ultrasonic phased array systems —
Part 3: Complete systems
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 EN 1330-4 and EN 16018 and the
following apply.
3.1
phased array set-up
probe arrangement defined by probe characteristics (e.g. frequency, probe element size, beam angle, wave
mode), probe position, and the number of probes
3.2
phased array image
one- or two-dimensional display, constructed from the collected information of phased array operation
3.3
probe position
PP
distance between the front of the wedge and the weld centreline
3.4
phased array indication
pattern or disturbance in the phased array image which may need further evaluation
3.5
skewed scan
scan performed with a skewed angle
NOTE The skewed angle can be achieved electronically or by means of probe orientation
3.6
scan increment
distance between successive data collection points in the direction of scanning (mechanically or electronically)
4 Testing levels
Quality requirements for welded joints are mainly associated with the material, welding process and service
conditions. To accommodate all of these requirements, this International Standard specifies four testing levels
(A, B, C, and D).
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 application using a written procedure which shall take into account the
general requirements of this International Standard. This includes tests of metals other than ferritic steel, tests
on partial penetration welds, tests with automated equipment, tests at object temperatures outside the range.
[2]
In general, the testing levels are related to quality levels (e.g. ISO 5817 ). The appropriate testing level can
be specified by standards for testing of welds (e.g. ISO 17635), product standards or other documents. When
ISO 17635 is specified, the recommended testing levels are as given in Table 1.
2 © ISO 2012 – All rights reserved
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
Table 1 — Recommended testing levels
[2]
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 set-up shall be verified with
a reference block. In cases where scanning is 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 the evaluation of the indications is based on amplitude only, the deviation from the normal to the weld shall
not exceed 6°.
Table 2 — Description of testing levels
Testing levels
A B C
Mode Example of sketches
Reference block (see Annex A)
Block A Block B Block C
Test set-up
Fixed angles at fixed
Not suitable as single
probe position to weld Two sides Two sides
technique
a
(line scans)
Fixed angles with
One side One side One side
a
raster scanning
E-scan at fixed probe
Two sides with
position One side Two sides
c
two angles
a
(line scan)
S-scan at fixed probe Two sides
Two sides or two probe
position to weld One side or two probe
positions
a
(line scan) positions
S-scan raster Not recommended One side
TOFD generated with Not recommended, TOFD testing in
One set-up
a
phased array accordance with ISO 10863
b
Skewed scan If required by specification
a
For testing level C, at least two different test set-ups from this table shall be combined; at least one of them shall be S-scan or
TOFD.
b
If detection of transverse discontinuities is required by specification, a suitable additional test set-up shall be applied. Skewed
probe or electronically skewed beam can be used.
c
At least 10° difference.
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
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;
e) time of inspection relative to any post-weld heat treatment;
f) result of any parent metal testing carried out prior to and/or after welding.
5.3 Written test procedure
For all testing levels a written test procedure is required.
A procedure shall be written and shall include the following information as a minimum:
a) the purpose and extent of testing;
b) testing techniques;
c) testing levels;
d) personnel qualification/training requirements;
e) equipment requirements (including but not limited to frequency, sampling rate, pitch between elements,
element size);
f) reference and/or test blocks;
g) the setting of equipment;
h) available access and surface conditions;
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
i) the testing of parent material;
j) the evaluation of indications;
k) acceptance levels and/or recording levels;
l) reporting requirements;
m) environmental and safety issues.
The procedure shall include a documented testing strategy or scan plan showing probe placement, movement,
and component coverage that provides a standardized and repeatable methodology for weld testing. The scan
plan shall also include ultrasonic beam angles used, beam directions with respect to the weld centreline, and
volume examined for each weld.
6 Requirements for personnel and equipment
6.1 Personnel qualifications
Personnel performing testing in accordance with this International Standard shall be qualified to an appropriate
level in accordance with EN 473, ISO 9712 or equivalent in the relevant industrial sector.
In addition to a general knowledge of ultrasonic weld inspection, the operators shall be familiar with and have
practical experience in the use of phased arrays. Specific training and examination of personnel should be
performed on representative pieces. These training and examination results should be documented. If this
is not the case, specific training and examination should be performed with the finalized ultrasonic testing
procedures and selected ultrasonic testing equipment on representative samples containing natural or artificial
reflectors similar to those expected. These training and examination results should be documented.
6.2 Equipment
[6]
6.2.1 General. In selecting the system components (hardware and software) CEN/TR 15134 gives
useful information.
6.2.2 Ultrasonic equipment and display. Ultrasonic equipment used for the phased array testing should be
in accordance with the requirements of EN 16392-1, EN 16392-2, and EN 16392-3 when applicable.
The equipment shall be able to select an appropriate portion of the time base within which A-scans are digitized.
It is recommended that a sampling rate of the A-scan be used of at least six times the nominal probe frequency.
6.2.3 Ultrasonic probes. Both longitudinal and shear wave modes may be used.
Adaptation of probes to curved scanning surfaces shall comply with ISO 17640. When adapted probes are
used, the influence on the sound beam shall be taken into account.
6.2.4 Scanning mechanisms. To achieve consistency of the images (collected data), guiding mechanisms
and scan encoder(s) shall be used.
7 Preparation for testing
7.1 Volume to be inspected
The purpose of the testing shall be defined by specification. Based on this, the volume to be inspected shall
be determined.
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
For tests at the manufacturing stage, the testing volume shall include the weld and parent material for at least
10 mm on each side of the weld (5 mm for laser welds and for electron beam welds), or the width of the heat-
affected zone (based on the manufacturer’s information), whichever is greater.
A scan plan should be provided. The scan plan should show the beam coverage, the weld thickness and the
weld geometry.
Ensure that the sound beam(s) cover(s) the volume to be tested.
7.2 Verification of test set-up
The capability of the test set-up shall be verified by the use of reference blocks.
7.3 Scan increment setting
The scan increment setting along the weld is dependent upon the wall thickness to be examined. For thicknesses
up to 10 mm, the scan increment shall be no more than 1 mm. For thicknesses between 10 mm and 150 mm,
the scan increment shall be no more than 2 mm. Above 150 mm, a scan increment of 3 mm is recommended.
The scan increment setting perpendicular to the weld when applicable shall be chosen in order to ensure the
coverage of the examination volume.
When TOFD is used, the scan increment shall be in accordance with ISO 10863.
7.4 Geometry considerations
Care should be taken when examining welds of complex geometry, e.g. weld joining materials of unequal
thickness, materials that are joined at an angle or nozzles. These tests should be planned carefully and require
in-depth knowledge of sound propagation and shall always be carried out under testing level D.
For level D tests scan plan(s), representative reference block(s), and a performance demonstration are
mandatory (see Annex A).
NOTE In some cases, the number of reference blocks can be reduced by use of simulation programs.
7.5 Preparation of scanning surfaces
Scanning surfaces shall be clean in an area wide enough to permit the testing volume to be fully covered.
Scanning surfaces shall be even and free from foreign matter likely to interfere with probe coupling (e.g. rust,
loose scale, weld spatter, notches, grooves). Waviness of the test surface shall not result in a gap between a
probe and the test surface greater than 0,5 mm. These requirements shall be ensured by dressing the scanning
surface, if necessary.
Scanning surfaces may be assumed to be satisfactory if the surface roughness, Ra, is not greater than 6,3 µm
for machined surfaces, or not greater than 12,5 µm for shot-blasted surfaces.
When coating, paint, cladding etc. is present and is not to be removed, testing level D is applicable.
7.6 Temperature
When not using special high temperature phased array probes and couplants, the surface temperature of the
object under testing shall be in the range 0 °C to 50 °C.
For temperatures outside this range, the suitability of the equipment shall be verified.
7.7 Couplant
In order to generate proper images, a couplant shall be used which provides a constant transmission of
ultrasound between the probes and the material.
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SIST EN ISO 13588:2013
ISO 13588:2012(E)
The couplant used for calibration shall be the same as that used in subsequent testing and post-calibrations.
8 Testing of base material
When the test is performed according to this International Standard, a lamination test shall be performed. This
may be carried out as part of or independent of the test.
9 Range and sensitivity settings
9.1 Settings
9.1.1 General
Setting of range and sensitivity shall be carried out prior to each test in accordance with this International
Standard. Any
...
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