SIST EN 583-4:2004
(Main)Non-destructive testing - Ultrasonic examination - Part 4: Examination for discontinuities perpendicular to the surface
Non-destructive testing - Ultrasonic examination - Part 4: Examination for discontinuities perpendicular to the surface
This European Standard defines the principles for tandem- and LLT -examination for the detection of discontinuities perpendicular to the surface.
The general principles required for the ultrasonic examination of industrial products are described in EN 583-1. A list of symbols and equations is given in EN 583-2.
The tandem- or LLT-examination should be used for the detection of planar discontinuities with distance to the surface greater than 15 mm. This European Standard has been prepared for the examination of metallic materials with a thickness between 40 mm and 500 mm with parallel or concentric surfaces. It can, however, be used for other materials and smaller thickness provided special measures are taken.
Zerstörungsfreie Prüfung - Ultraschallprüfung - Teil 4: Prüfung auf Inhomogenitäten senkrecht zur Oberfläche
Diese Europäische Norm definiert Grundlagen für die Tandemprüfung und die LLT )-Prüfung für den Nachweis von Inhomogenitäten, die senkrecht zur Oberfläche orientiert sind.
Die für die Ultraschallprüfung von Industrieprodukten notwendigen allgemeinen Grundlagen sind in EN 583-1 beschrieben. Eine Liste mit Symbolen und Gleichungen ist in EN 583-2 angegeben.
Die Tandem- oder die LLT-Prüfung sollte für den Nachweis von ebenen Inhomogenitäten mit einem Abstand zur Oberfläche von mehr als 15 mm angewendet werden. Diese Europäische Norm wurde für die Prüfung von metallischen Werk-stoffen mit einer Dicke zwischen 40 mm und 500 mm und parallelen oder konzentrischen Oberflächen erstellt. Unter der Voraussetzung, dass besondere Maßnahmen ergriffen werden, kann sie jedoch für andere Werkstoffe und geringere Dicken angewendet werden.
Essais non destructifs - Contrôle ultrasonore - Partie 4 : Contrôle des discontinuités perpendiculaires a la surface
La présente Norme européenne définit les principes généraux du contrôle par les méthodes tandem et LLT ) pour la détection des discontinuités perpendiculaires a la surface.
Les principes généraux du contrôle par ultrasons de produits industriels sont décrits dans l'EN 583-1. La liste des symboles et des équations est donnée dans l'EN 583-2.
Il convient d'utiliser le contrôle par les méthodes tandem ou LLT pour détecter des discontinuités planes situées a plus de 15 mm de la surface. La présente Norme européenne a été préparée pour contrôler les matériaux métalliques dont l'épaisseur est comprise entre 40 mm et 500 mm, et ayant des surfaces paralleles ou concentriques. Elle peut cependant etre utilisée dans d'autres cas a condition que des mesures spécifiques soient prises.
Neporušitveno preskušanje – Ultrazvočne preiskave – 4. del: Preiskave za odkrivanje nehomogenosti, ki potekajo pravokotno na površino
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 583-4:2004
01-marec-2004
1HSRUXãLWYHQRSUHVNXãDQMH±8OWUD]YRþQHSUHLVNDYH±GHO 3UHLVNDYH]D
RGNULYDQMHQHKRPRJHQRVWLNLSRWHNDMRSUDYRNRWQRQDSRYUãLQR
Non-destructive testing - Ultrasonic examination - Part 4: Examination for discontinuities
perpendicular to the surface
Zerstörungsfreie Prüfung - Ultraschallprüfung - Teil 4: Prüfung auf Inhomogenitäten
senkrecht zur Oberfläche
Essais non destructifs - Contrôle ultrasonore - Partie 4 : Contrôle des discontinuités
perpendiculaires a la surface
Ta slovenski standard je istoveten z: EN 583-4:2002
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
SIST EN 583-4:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 583-4:2004
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SIST EN 583-4:2004
EUROPEAN STANDARD
EN 583-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2002
ICS 19.100
English version
Non-destructive testing - Ultrasonic examination - Part 4:
Examination for discontinuities perpendicular to the surface
Essais non destructifs - Contrôle ultrasonore - Partie 4: Zerstörungsfreie Prüfung - Ultraschallprüfung - Teil 4:
Contrôle des discontinuités perpendiculaires à la surface Prüfung auf Inhomogenitäten senkrecht zur Oberfläche
This European Standard was approved by CEN on 20 October 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 583-4:2002 E
worldwide for CEN national Members.
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SIST EN 583-4:2004
EN 583-4:2002 (E)
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions.4
4 Tandem examination .4
4.1 General.4
4.2 Time base adjustment .5
4.3 Setting of sensitivity.5
4.4 Determination of examination zones .6
4.5 DGS-diagram for tandem examination .7
4.6 Corrections of sensitivity.7
4.7 Object with concentric surfaces.8
5 LLT-examination .10
5.1 General.10
5.2 Time base adjustment and determination of discontinuity depth.11
5.3 Setting of sensitivity.12
5.4 Determination of examination depth .12
5.5 DGS-diagrams for LLT-examination .14
5.6 Correction of sensitivity.14
Annex A (informative) Nomograms for determination of tandem distances for convex (Figure A.1) and
concave (Figure A.2) scanning surface.15
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other
provisions of EU Directives. .18
2
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SIST EN 583-4:2004
EN 583-4:2002 (E)
Foreword
This document (EN 583-4:2002) has been prepared by Technical Committee CEN /TC 138, "Non-destructive
testing", the secretariat of which is held by AFNOR.
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 March 2003, and conflicting national standards shall be withdrawn at the latest by
March 2003.
This standard consists of the following parts:
EN 583-1, Non-destructive testing - Ultrasonic examination - Part 1: General principles
EN 583-2, Non-destructive testing - Ultrasonic examination - Part 2: Sensitivity and range setting
EN 583-3, Non-destructive testing - Ultrasonic examination - Part 3: Transmission technique
EN 583-4, Non-destructive testing - Ultrasonic examination - Part 4: Examination for discontinuities perpendicular to
the surface
EN 583-5, Non-destructive testing - Ultrasonic examination - Part 5: Characterization and sizing of discontinuities
ENV 583-6, Non-destructive testing - Ultrasonic examination - Part 6: Time-of-flight diffraction technique as a
method for detection and sizing of discontinuities
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
Annex A is informative
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
3
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SIST EN 583-4:2004
EN 583-4:2002 (E)
1 Scope
1
This European Standard defines the principles for tandem- and LLT -examination for the detection of discontinuities
perpendicular to the surface.
The general principles required for the ultrasonic examination of industrial products are described in EN 583-1. A list of
symbols and equations is given in EN 583-2.
The tandem- or LLT-examination should be used for the detection of planar discontinuities with distance to the surface
greater than 15 mm. This standard has been prepared for the examination of metallic materials with a thickness
between 40 mm and 500 mm with parallel or concentric surfaces. It can, however, be used for other materials and
smaller thickness provided special measures are taken.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated
references, subsequent amendments to or revisions of any of these publications apply to this European Standard only
when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred
to applies (including amendments).
EN 583-1, Non-destructive testing - Ultrasonic examination - Part 1: General principles.
EN 583-2, Non-destructive testing - Ultrasonic examination - Part 2: Sensitivity and range setting.
EN 1330-4, Non-destructive testing - Terminology - Part 4: Terms used in ultrasonic testing.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions of EN 1330-4 apply.
4 Tandem examination
4.1 General
o
The examination is normally carried out using two similar 45 angle probes, one probe operating as the transmitter and
the other probe as receiver. For wall thicknesses greater than approximately 160 mm, probes with different transducer
sizes are preferred in order to ensure approximately the same beam diameters in the examination zone.
The use of probe angles other than 45° may be necessary to comply with particular geometrical conditions. Probe
angles that give rise to mode conversions shall be avoided.
The probes are located in a line with their acoustic axis in the same direction. In this way the sound beam from the rear
probe will, after reflection from the opposite surface, intersect the sound beam from the front probe at the centre of the
examination zone.
Figure 1 shows the relationship between the spacing of the probes (y) and the examination depth of the crosspoint
(t ) and the height of the examination zone (t ).
m z
1
LLT means longitudinal-longitudinal-transverse wave.
4
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SIST EN 583-4:2004
EN 583-4:2002 (E)
Key
1 Probe 1 d Material thickness
2Probe 2 t Examination depth
m
3 Examination zone y Probe distance
a Projection distance t Height of examination zone
z
Figure 1 Basic principle of tandem technique
When examining objects with plane parallel surfaces the distance between the probes can be defined using the
following equation:
y = 2 tan a (d – t ) (1)
m
for 45°
y = 2 (d – t )
m
Scanning shall be performed in either of the following ways:
both probes are moved along the surfaces with a fixed distance (y).
In this way only one examination zone is examined at a time, and the scanning shall be repeated with different
probe distance until the complete examination volume has been examined;
both probes are moved simultaneously, such that the sum of their distances from the required plane of
intersection, e.g. the vertical weld axis, remains constant, thereby scanning the full object thickness in one
continuous movement.
4.2 Time base adjustment
Basically all relevant echoes will appear at the same sound path distance, which corresponds to the V-path. Therefore,
...
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