EN ISO 11666:2010

SLOVENSKI STANDARD
01-november-2011
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SIST EN 1712:1999
SIST EN 1712:1999/A1:2003
SIST EN 1712:1999/A2:2004
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Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO
11666:2010)
Zerstörungsfreie Prüfung von Schweißverbindungen - Ultraschallprüfung -
Zulässigkeitsgrenzen (ISO 11666:2010)
Contrôle non destructif des assemblages soudés - Contrôle par ultrasons - Niveaux
d'acceptation (ISO 11666:2010)
Ta slovenski standard je istoveten z: EN ISO 11666:2010
ICS:
25.160.40 Varjeni spoji in vari Welded joints
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11666
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2010
ICS 25.160.40 Supersedes EN 1712:1997
English Version
Non-destructive testing of welds - Ultrasonic testing -
Acceptance levels (ISO 11666:2010)
Contrôle non destructif des assemblages soudés - Contrôle Zerstörungsfreie Prüfung von Schweißverbindungen -
par ultrasons - Niveaux d'acceptation (ISO 11666:2010) Ultraschallprüfung von Schweißverbindungen -
Zulässigkeitsgrenzen (ISO 11666:2010)
This European Standard was approved by CEN on 14 December 2010.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11666:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 11666:2010) 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 June 2011, and conflicting national standards shall be withdrawn at
the latest by June 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1712:1997.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

INTERNATIONAL ISO
STANDARD 11666
First edition
2010-12-15
Non-destructive testing of welds —
Ultrasonic testing — Acceptance levels
Contrôle non destructif des assemblages soudés — Contrôle par
ultrasons — Niveaux d'acceptation

Reference number
ISO 11666:2010(E)
©
ISO 2010
ISO 11666:2010(E)
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ii © ISO 2010 – All rights reserved

ISO 11666:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Measurement of indication length.1
4 Sensitivity setting and levels .2
5 Acceptance levels .2
5.1 General .2
5.2 Longitudinal indications.3
5.3 Transverse indications .3
5.4 Grouping of indications.3
5.5 Cumulative length of acceptable indications .4
Annex A (normative) Levels.5
Annex B (normative) Fixed amplitude level technique .17

ISO 11666:2010(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 11666 was prepared by the European Committee for Standardization (CEN) Technical Committee
TC 121, Welding, Subcommittee SC 5, Testing of welds, 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 2010 – All rights reserved

INTERNATIONAL STANDARD ISO 11666:2010(E)

Non-destructive testing of welds — Ultrasonic testing —
Acceptance levels
1 Scope
This International Standard specifies ultrasonic acceptance levels 2 and 3 for full penetration welded joints in
ferritic steels, which correspond to ISO 5817 quality levels B and C. An acceptance level corresponding to
ISO 5817 quality level D is not included in this International Standard as ultrasonic testing is generally not
requested for this weld quality.
These acceptance levels are applicable to testing carried out in accordance with ISO 17640.
This International Standard applies to the examination of full penetration ferritic steel welds, with thicknesses
from 8 mm to 100 mm. It can also be used for other types of welds, materials and thicknesses above 100 mm,
provided the examinations have been performed with necessary consideration of the geometry and acoustic
properties of the component, and an adequate sensitivity can be employed to enable the acceptance levels of
this International Standard to be applied. The nominal frequency of probes used in this International Standard
is between 2 MHz and 5 MHz unless attenuation or requirements for higher resolution call for other
frequencies. The use of these acceptance levels in conjunction with frequencies outside this range needs to
be considered carefully.
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 5817, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding
excluded) — Quality levels for imperfections
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
ISO 23279, Non-destructive testing of welds — Ultrasonic testing — Characterization of indications in welds
3 Measurement of indication length
The length of an indication shall be determined by measuring the distance along the length over which the
echo amplitude is above the evaluation level, using the fixed amplitude level technique specified in Annex B.
Alternative techn
...