SIST EN ISO 10893-7:2019
(Main)Non-destructive testing of steel tubes - Part 7: Digital radiographic testing of the weld seam of welded steel tubes for the detection of imperfections (ISO 10893-7:2019)
Non-destructive testing of steel tubes - Part 7: Digital radiographic testing of the weld seam of welded steel tubes for the detection of imperfections (ISO 10893-7:2019)
This document specifies the requirements for digital radiographic X-ray testing by either computed
radiography (CR) or radiography with digital detector arrays (DDAs) of the longitudinal or helical weld
seams of automatic fusion arc-welded steel tubes for the detection of imperfections. This document
specifies acceptance levels and calibration procedures.
It can also be applicable to the testing of circular hollow sections.
NOTE As an alternative, see ISO 10893-6 for film-based radiographic X-ray testing.
Zerstörungsfreie Prüfung von Stahlrohren - Teil 7: Digitale Durchstrahlungsprüfung der Schweißnaht geschweißter Stahlrohre zum Nachweis von Unvollkommenheiten (ISO 10893-7:2019)
Dieses Dokument legt die Anforderungen an die digitale Durchstrahlungsprüfung von automatisiert
hergestellten Längs- oder Spiralnähten lichtbogenschmelzgeschweißter Stahlrohre fest, die zum Nachweis
von Unvollkommenheiten entweder mittels Computer-Radiographie (CR) oder mittels digitaler
Detektorarrays (DDAs) durchgeführt werden. Dieses Dokument legt die Zulässigkeitsgrenzen und die
Kalibrierverfahren fest.
Dieses Dokument kann auch für die Prüfung von kreisförmigen Hohlprofilen angewendet werden.
ANMERKUNG Als alternatives Verfahren ist in ISO 10893-6 die filmbasierte Durchstrahlungsprüfung festgelegt.
Essais non destructifs des tubes en acier - Partie 7: Contrôle radiographique numérique du cordon de soudure des tubes en acier soudés pour la détection des imperfections (ISO 10893-7:2019)
Le présent document spécifie les exigences relatives au contrôle radiographique numérique par rayons X des cordons de soudure longitudinaux ou hélicoïdaux des tubes en acier soudés en automatique par fusion à l'arc pour la détection des imperfections, soit par radiographie numérisée (CR) soit par radiographie avec des mosaïques de détecteurs numériques. Le présent document spécifie les niveaux d'acceptation et les procédures d'étalonnage.
Il peut s'appliquer également au contrôle des profils creux circulaires.
NOTE De manière alternative, voir la norme ISO 10893‑6 pour les essais radiographiques sur film.
Neporušitveno preskušanje jeklenih cevi - 7. del: Ugotavljanje napak varov pri jeklenih ceveh, obločno varjenih pod praškom, z digitalno radiografsko preiskavo (ISO 10893-7:2019)
Ta dokument določa zahteve za ugotavljanje napak vzdolžnih ali vijačnih varov pri avtomatsko talilno obločno varjenih jeklenih ceveh z digitalno radiografsko rentgensko preiskavo z računalniško radiografijo (CR) ali radiografijo z digitalnimi detektorskimi nizi (DDA). Ta dokument določa ravni sprejemljivosti in postopke umerjanja.
Lahko se uporablja tudi za preskušanje krožnih votlih profilov.
OPOMBA: Za alternativne metode glej standard ISO 10893-6 za radiografsko rentgensko preiskavo na podlagi filma.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10893-7:2019
01-maj-2019
1DGRPHãþD
SIST EN ISO 10893-7:2011
1HSRUXãLWYHQRSUHVNXãDQMHMHNOHQLKFHYLGHO 8JRWDYOMDQMHQDSDNYDURYSUL
MHNOHQLKFHYHKREORþQRYDUMHQLKSRGSUDãNRP]GLJLWDOQRUDGLRJUDIVNRSUHLVNDYR
,62
Non-destructive testing of steel tubes - Part 7: Digital radiographic testing of the weld
seam of welded steel tubes for the detection of imperfections (ISO 10893-7:2019)
Zerstörungsfreie Prüfung von Stahlrohren - Teil 7: Digitale Durchstrahlungsprüfung der
Schweißnaht geschweißter Stahlrohre zum Nachweis von Unvollkommenheiten (ISO
10893-7:2019)
Essais non destructifs des tubes en acier - Partie 7: Contrôle radiographique numérique
du cordon de soudure des tubes en acier soudés pour la détection des imperfections
(ISO 10893-7:2019)
Ta slovenski standard je istoveten z: EN ISO 10893-7:2019
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
77.040.20 Neporušitveno preskušanje Non-destructive testing of
kovin metals
77.140.75 Jeklene cevi in cevni profili Steel pipes and tubes for
za posebne namene specific use
SIST EN ISO 10893-7:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 10893-7:2019
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SIST EN ISO 10893-7:2019
EN ISO 10893-7
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 23.040.10; 77.040.20; 77.140.75 Supersedes EN ISO 10893-7:2011
English Version
Non-destructive testing of steel tubes - Part 7: Digital
radiographic testing of the weld seam of welded steel
tubes for the detection of imperfections (ISO 10893-
7:2019)
Essais non destructifs des tubes en acier - Partie 7: Zerstörungsfreie Prüfung von Stahlrohren - Teil 7:
Contrôle par radiographie numérique du cordon de Digitale Durchstrahlungsprüfung der Schweißnaht
soudure des tubes en acier soudés pour la détection geschweißter Stahlrohre zum Nachweis von
des imperfections (ISO 10893-7:2019) Unvollkommenheiten (ISO 10893-7:2018)
This European Standard was approved by CEN on 29 December 2018.
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 10893-7:2019 E
worldwide for CEN national Members.
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SIST EN ISO 10893-7:2019
EN ISO 10893-7:2019 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 10893-7:2019
EN ISO 10893-7:2019 (E)
European foreword
This document (EN ISO 10893-7:2019) has been prepared by Technical Committee ISO/TC 17 "Steel" in
collaboration with Technical Committee CEN/TC 459/SC 10 “Steel tubes, and iron and steel fittings” the
secretariat of which is held by UNI.
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 10893-7:2011.
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 10893-7:2019 has been approved by CEN as EN ISO 10893-7:2019 without any
modification.
3
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SIST EN ISO 10893-7:2019
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SIST EN ISO 10893-7:2019
INTERNATIONAL ISO
STANDARD 10893-7
Second edition
2019-02
Non-destructive testing of steel
tubes —
Part 7:
Digital radiographic testing of the
weld seam of welded steel tubes for
the detection of imperfections
Essais non destructifs des tubes en acier —
Partie 7: Contrôle par radiographie numérique du cordon de soudure
des tubes en acier soudés pour la détection des imperfections
Reference number
ISO 10893-7:2019(E)
©
ISO 2019
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(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
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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 10893-7:2019
ISO 10893-7:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 3
5 Test equipment. 3
6 Test method . 4
7 Image quality . 6
8 Image processing .11
9 Classification of indications .12
10 Acceptance limits .12
11 Acceptance .13
12 Image storage and display .13
13 Test report .13
Annex A (informative) Examples of distribution of imperfections .15
Bibliography .17
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(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 17, Steel, Subcommittee SC 19, Technical
delivery conditions for steel tubes for pressure purposes.
This second edition cancels and replaces the first edition (ISO 10893-7:2011), which has been technically
revised. The main changes compared with the previous edition are as follows:
a) some terms and definitions from ISO 17636-2 have been included;
b) a safety warning for X and gamma rays has been added at the end of Clause 4;
c) Figure 2 has been aligned with ISO 17636-1 up to 1 000 kV;
d) the symbols for mathematical formula have been changed in accordance with the ISO/IEC Directives;
e) it has been clarified in 4.7 when the detector size is smaller than the applicable weld length;
f) “contact technique” has been deleted from the test method in Clause 6;
g) a reference to ISO 17636-2 has been added in 6.8 for additional details related to spatial resolution;
h) the requirements for duplex wire IQI position have been added in Clause 7;
i) a reference to ISO 17636-2 for the calibration of DDAs has been added in Clause 8;
j) Figure 4 and the figures in Annex A have been revised.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
Introduction
Digital radiography has been used for the testing of longitudinal weld seams in submerged arc-welded
steel tubes for some years. Digital radiography can be automated, and is considered to be more
environmentally friendly than film-based radiographic techniques.
Digital radiography maintains the levels of security and availability afforded by X-ray film testing,
which have been in place for many years. Images can be made available in a fraction of the time
previously taken by film-based techniques, and usually at a lower exposure level and increased detector
unsharpness when compared to film.
The storage and handling of digital images maintain the same levels of integrity available from film-
based techniques, yet gain all the benefits associated with comprehensive data storage and retrieval
systems.
Imaging systems are constantly under development, and an important aspect of this document is to
qualify the use of those alternative systems currently available. This document describes the steps
required to deliver these benefits.
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SIST EN ISO 10893-7:2019
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SIST EN ISO 10893-7:2019
INTERNATIONAL STANDARD ISO 10893-7:2019(E)
Non-destructive testing of steel tubes —
Part 7:
Digital radiographic testing of the weld seam of welded
steel tubes for the detection of imperfections
1 Scope
This document specifies the requirements for digital radiographic X-ray testing by either computed
radiography (CR) or radiography with digital detector arrays (DDAs) of the longitudinal or helical weld
seams of automatic fusion arc-welded steel tubes for the detection of imperfections. This document
specifies acceptance levels and calibration procedures.
It can also be applicable to the testing of circular hollow sections.
NOTE As an alternative, see ISO 10893-6 for film-based radiographic X-ray testing.
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 5576, Non-destructive testing — Industrial X-ray and gamma-ray radiology — Vocabulary
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel
ISO 11484, Steel products — Employer’s qualification system for non-destructive testing (NDT) personnel
ISO 17636-2:2013, Non-destructive testing of welds — Radiographic testing — Part 2: X- and gamma-ray
techniques with digital detectors
ISO 19232-1, Non-destructive testing — Image quality of radiographs — Part 1: Determination of the
image quality value using wire-type image quality indicators
ISO 19232-2, Non-destructive testing — Image quality of radiographs — Part 2: Determination of the
image quality value using step/hole-type image quality indicators
ISO 19232-5, Non-destructive testing — Image quality of radiographs — Part 5: Determination of the
image unsharpness and basic spatial resolution value using duplex wire-type image quality indicators
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5576, ISO 11484 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/
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
3.1
tube
hollow long product open at both ends, of any cross-sectional shape
3.2
welded tube
tube (3.1) made by forming a hollow profile from a flat product and welding adjacent edges together,
and which after welding can be further processed, either hot or cold, into its final dimensions
3.3
manufacturer
organization that manufactures products in accordance with the relevant standard(s) and declares the
conformity of the delivered products with all applicable provisions of the relevant standard(s)
3.4
agreement
contractual arrangement between the manufacturer (3.3) and the purchaser at the time of enquiry
and order
3.5
signal-to-noise ratio
SNR
S/N
ratio of mean value of the linearized grey values to the standard deviation of the linearized grey values
(noise) in a given region of interest in a digital image
[SOURCE: ISO 17636-2:2013, 3.10, modified — The symbol S/N has been added.]
3.6
basic spatial resolution of a digital detector
detector
R
bs
resolution that corresponds to half of measured detector unsharpness in a digital image and to the
effective pixel size, and indicates the smallest geometrical detail, which can be resolved with a digital
detector at a magnification equal to one
Note 1 to entry: For this measurement, the duplex wire image quality indicator (IQI) is placed directly on the
digital detector array or imaging plate.
Note 2 to entry: The measurement of unsharpness is described in ISO 19232-5, see also ASTM E2736 and
ASTM E1000.
detector
[SOURCE: ISO 17636-2:2013, 3.8, modified — The symbol has been changed from SR .]
b
3.7
representative quality indicator
RQI
real part, or a fabrication of similar geometry in radiologically similar material to a real part, that has
features of known characteristics that represent those features of interest for which the parts to be
purchased are being examined
[SOURCE: ASTM E1817: 2008]
3.8
digital detector array system
DDA system
electronic device converting ionizing or penetrating radiation into a discrete array of analogue
signals, which are subsequently digitized and transferred to a computer for display as a digital image
corresponding to the radiologic energy pattern imparted upon the input region of the device
[SOURCE: ISO 17636-2:2013, 3.3]
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
4 General requirements
4.1 Unless otherwise specified by the product standard or agreed on by the manufacturer and the
purchaser, a radiographic inspection shall be carried out on welded tubes after completion of all the
primary manufacturing process operations (rolling, heat treating, cold and hot working, sizing and
primary straightening, etc.).
4.2 This inspection shall be carried out by trained operators who are certified (e.g. ISO 9712) or
qualified (e.g. ISO 11484 or ASNT SNT-TC-1A), and supervised by competent personnel nominated by
the manufacturer. In the case of third-party inspection, this shall be agreed on between the manufacturer
and the purchaser.
The operating authorization issued by the employer shall be according to a written procedure. Non-
destructive testing (NDT) operations shall be authorized by a level 3 NDT individual approved by the
employer.
NOTE The definitions of levels 1, 2 and 3 can be found in the appropriate standards, e.g. ISO 9712 and
ISO 11484.
4.3 The tubes under test shall be sufficiently straight and free of foreign matter as to ensure the
validity of the test. The surfaces of the weld seam and adjacent parent metal shall be sufficiently free
of such foreign matter and surface irregularities, which would interfere with the interpretation of the
radiographs.
Surface grinding is permitted in order to achieve an acceptable surface finish.
4.4 In cases where the weld reinforcement is removed, markers, usually in the form of lead arrows,
shall be placed on each side of the weld such that its position can be identified on the radiographic image.
Alternatively, an integrated automatic positioning system may be used to identify the position of the weld.
4.5 Identification symbols, usually in the form of lead letters, shall be placed on each section of the
weld seam radiograph such that the projection of these symbols appears in each radiographic image
to ensure unequivocal identification of the section. Alternatively, an integrated automatic positioning
system may be used to identify the position of each radiographic image along the pipe weld.
4.6 Markings shall be displayed on the recorded radiographic images to provide reference points
for the accurate relocation of the position of each radiograph. Alternatively, the automated measured
image position may be displayed on the digital image viewing screen by software for accurate position
relocation.
4.7 When the detector size is smaller than the applicable weld length, the pipe or the detector shall
move into start-stop mode and digital radiographs shall be taken when the pipe is not moving.
WARNING — Exposure of any part of the human body to X-rays or gamma-rays can be highly
injurious to health. Wherever X-ray equipment or radioactive sources are in use, appropriate
safety measures shall be applied.
Local, national or international safety precautions when using ionizing radiation shall be strictly
applied.
5 Test equipment
The following digital imaging methods can be used in replacement of radiographic film:
a) CR with storage phosphor imaging plates (e.g. EN 14784-1 and EN 14784-2);
b) radiology with DDAs (e.g. ASTM E2597-07 and ASTM E2698);
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
c) digital radioscopy with image integration (e.g. EN 13068-1, EN 13068-2 and EN 13068-3).
6 Test method
6.1 The weld seam shall be tested by a digital radiographic technique, corresponding to Clause 5 a) to c).
6.2 Two image quality classes, A and B, conforming to ISO 17636-2, shall be specified:
— class A: radiographic examination technique with standard sensitivity;
— class B: radiographic technique with enhanced sensitivity.
NOTE Image quality class A is used for most applications. Image quality class B is intended for applications
where increased sensitivity is required to reveal all the imperfections being detected.
The required image quality class should be stated in the relevant product standard.
6.3 The digital image displayed shall meet the required image quality class A or B.
6.4 The beam of radiation shall be directed at the centre of the section of the weld seam under
examination and shall be normal to the tube surface at that point.
6.5 The diagnostic length shall be such that the increase in penetrated thickness at the ends of the
useful length of the sensitive detector input screen shall not exceed the penetrated thickness at the
centre of the detector by more than 10 % for image quality class B or by more than 20 % for image
quality class A, provided the specific requirements of 6.9 and Clause 7 are satisfied.
6.6 The single wall penetration technique shall be used. When the single wall technique is impracticable
for dimensional reasons, the use of the double wall penetration technique may be used, by agreement, if
the required sensitivities can be shown to be achievable.
6.7 If the geometric magnification technique (see 6.8) is not used, the detector shall be placed as close
to the object as possible.
The minimum value of the source-to-weld distance, f, shall be selected such that the ratio of this
distance to the effective focal spot size, d, i.e. f/d, conforms to the values given by Formulae (1) and (2):
for image quality class A:
2
f
3
≥×75, b (1)
d
for image quality class B:
2
f
3
≥×15 b (2)
d
where b is the distance between the source side of the weld and the sensitive surface of the detector, in
millimetres.
NOTE These relationships are presented graphically in Figure 1.
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
a
Effective focal spot size, d, in millimetres.
b
Minimum source-to-weld distance, f, for class B, in millimetres.
c
Minimum source to weld distance, f, for class A, in millimetres.
d
Weld-to-detector distance, b, in millimetres.
Figure 1 — Nomogram for determination of minimum source-to-weld distance, f, in relation to
weld-to-detector distance, b, and the effective focal spot size, d
6.8 An obstacle to the implementation of DDA systems is the large (> 50 μm) pixel size of the array
compared to the small grain size in film (which leads to film having very high spatial resolution).
It can, therefore, not be possible to achieve the required geometric resolution with a setup typically
used for film radiography. This difficulty may be circumvented by using geometric magnification to
achieve the required geometric resolution or by making use of the compensation principle [increasing
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
the signal-to-noise ratio (SNR) in the image] described in 7.1. Any combination of these measures is
allowed.
For additional details related to spatial resolution, refer to ISO 17636-2:2013, 7.7.
6.9 Exposure conditions, including X-ray tube voltage, shall achieve the image quality indicator (IQI)
requirements in Clause 7. Image contrast and brightness may be adjusted as required for digital image
viewing.
6.10 To maintain good flaw sensitivity, the X-ray tube voltage should be as low as possible and the S/N
N
in the digital image should be as high as possible. Recommended maximum values of X-ray tube voltage
versus penetrated thickness are given in Figure 2. These maximum values are best practice values for
film radiography.
After accurate calibration, DDA can provide sufficient image quality at significantly higher voltages
S
than those shown in Figure 2.
Key
X penetrated thickness, in mm
Y X-ray voltage, in kV
Figure 2 — Maximum X-ray voltage for X-ray devices up to 1 000 kV as a function of penetrated
thickness
7 Image quality
7.1 The image quality shall be determined by the use of IQIs of the type specified in ISO 19232-1,
ISO 19232-2 and ISO 19232-5, and agreed on between the manufacturer and the purchaser. The
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
appropriate IQI shall be placed on the source side of the weld on the base material adjacent to the weld.
(see Figures 3 and 4).
a) Wire type
b) Step/hole and hole types
c) Duplex type — For use with wire or step/hole type
Key
1 centre of beam
2 wire type IQI, thinnest wire away from the centre of the beam
3 duplex type IQI, approx. 5° tilted
4 step/hole type IQI, thinnest step away from the centre of the beam
5 hole type IQI, if necessary with shim stock
6 outer weld reinforcement
7 tube wall
8 inner weld reinforcement
a
Mapped weld length (DDA) or image plate length (CR).
Figure 3 — Positioning of IQIs — Basic requirements
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SIST EN ISO 10893-7:2019
ISO 10893-7:2019(E)
a) Wire type
b) Step/hole type
c) Hole type
d) Duplex type
Key
1 place identification number here
NOTE Figure 4 c) is a hole-type IQI of ASTM E1025.
Figure 4 — Types of image quality indicator
When using a wire IQI, the wires shall be directed perpendicular to the weld and its location shall
ensure that at least 10 mm of the wire length shows in a section of the metal adjacent to the weld. If
requested, an additional or longer IQI shall be placed across the weld.
When the source side is inaccessible, the IQIs may be placed on the detector side of the object. In these
circumstances, a letter “F” shall be placed near the IQIs and thi
...
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