SIST EN 12668-2:2002
(Main)Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 2: Probes
Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 2: Probes
This part of the standard covers probes used for ultrasonic non-destructive examination in the following categories with centre frequencies in the range 0,5 to 15 MHz, focusing and without focusing means: 1) single or dual transducer contact probes generating compressional or shear waves; 2) immersion probes. Periodic tests for probes are not included in this part of this standard. Routine tests for the verification of probes using onsite methods are given in part 3 of this standard.
Zerstörungsfreie Prüfung - Charakterisierung und Verifizierung der Ultraschall-Prüfausrüstung - Teil 2: Prüfköpfe
1 Anwendungsbereich
Diese Europäische Norm gilt für Prüfköpfe für die zerstörungsfreie Prüfung mit Ultraschall mit Mittenfrequenzen zwischen 0,5 MHz und 15 MHz, fokussierend oder ohne fokussierende Vorrichtungen in den folgenden Kategorien:
a) Prüfköpfe für den direkten Kontakt mit einem oder zwei Schwingern, die Longitudinalwellen oder Transver-salwellen erzeugen;
b) Tauchtechnik-Prüfköpfe.
Wenn materialabhängige Ultraschallwerte in dieser Norm angegeben werden, beruhen sie auf Stahl mit einer Schallgeschwindigkeit von (5920 ± 50) m/s bei Longitudinalwellen und von (3255 ± 30) m/s bei Transversalwellen.
Wiederkehrende Überprüfungen für Prüfköpfe sind nicht in diesem Teil der Norm enthalten. Routinemäßige Kontrollen zur Beurteilung von Prüfköpfen mit Methoden, die am Prüfort angewendet werden können, sind in EN 12668-3 aufgeführt.
Wenn mit Zustimmung der Vertragspartner außer den in EN 12668-3 aufgeführten Parametern auch noch zusätzliche Parameter während der Lebensdauer des Prüfkopfes gemessen werden müssen, so sollten die Verfahren zur Beurteilung für diese zusätzlichen Parameter aus den im vorliegenden Teil der Norm aufgeführten Verfahren ausgewählt werden.
Essais non destructifs - Caractérisation et vérification de l'appareillage de contrôle par ultrasons - Partie 2: Traducteurs
La présente Norme européenne concerne les traducteurs utilisés pour le contrôle non destructif par ultrasons des catégories suivantes avec fréquences centrales dans la bande 0,5 MHz à 15 MHz, avec et sans moyens de focalisation :
a) traducteurs par contact, simples ou émetteurs - récepteur séparés, générant des ondes de compression ou de cisaillement ;
b) traducteurs en immersion.
Lorsque des valeurs ultrasoniques dépendant des matériaux sont spécifiées dans cette norme, elles sont basées sur des aciers ayant une vitesse de propagation de l'onde ultrasonique de (5 920 ± 50) m/s pour les longueurs d'ondes longitudinales et de (3 255 ± 30) m/s pour les longueurs d'ondes transversales.
Les essais périodiques des traducteurs ne sont pas inclus dans cette partie de la norme. Les essais systématiques de vérification des traducteurs par application des méthodes sur site sont décrits dans l'EN 12668-3.
Si des paramètres, complémentaire à ceux spécifiés dans l'EN 12668-3 doivent être vérifiés au cours de la vie du traducteur conformément à un accord conclu entre les parties contractantes, il convient de choisir les méthodes de vérification correspondantes de ces paramètres complémentaires parmi celles données dans la présente norme.
Neporušitveno preskušanje - Ugotavljanje značilnosti in overjanje naprav za ultrazvočno preskušanje - 2. del: Preskuševalne glave
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2002
1HSRUXãLWYHQRSUHVNXãDQMH8JRWDYOMDQMH]QDþLOQRVWLLQRYHUMDQMHQDSUDY]D
XOWUD]YRþQRSUHVNXãDQMHGHO 3UHVNXãHYDOQHJODYH
Non-destructive testing - Characterization and verification of ultrasonic examination
equipment - Part 2: Probes
Zerstörungsfreie Prüfung - Charakterisierung und Verifizierung der Ultraschall-
Prüfausrüstung - Teil 2: Prüfköpfe
Essais non destructifs - Caractérisation et vérification de l'appareillage de contrôle par
ultrasons - Partie 2: Traducteurs
Ta slovenski standard je istoveten z: EN 12668-2:2001
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 12668-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2001
ICS 19.100
English version
Non-destructive testing - Characterization and verification of
ultrasonic examination equipment - Part 2: Probes
Essais non destructifs - Caractérisation et vérification de Zerstörungsfreie Prüfung - Charakterisierung und
l'appareillage de contrôle par ultrasons - Partie 2: Verifizierung der Ultraschall-Prüfausrüstung - Teil 2:
Traducteurs Prüfköpfe
This European Standard was approved by CEN on 16 April 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, 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
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12668-2:2001 E
worldwide for CEN national Members.
Page 2
Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms, definitions, symbols and abbreviations.4
4 General requirements for compliance .6
5 Manufacturer's technical specification for probes.6
6 Test equipment .10
6.1 Electronic equipment .10
6.2 Test blocks and other equipment.10
7 Performance requirements for probes .13
7.1 Physical aspects .13
7.2 Radio frequency pulse shape.13
7.3 Pulse spectrum and bandwidth.13
7.4 Relative pulse-echo sensitivity.14
7.5 Distance-amplitude curve .14
7.6 Electrical impedance or static capacitance .15
7.7 Beam parameters for immersion probes.16
7.8 Beam parameters for contact, straight-beam, single-transducer probes.20
7.9 Beam parameters for contact shear wave, angle-beam, single-transducer probes.23
7.10 Beam parameters for contact, straight beam, dual-transducer probes.26
7.11 Beam parameters for contact, shear wave angle beam, dual-transducer probes .28
Annex A (normative) Calculation of nearfield length of non-focusing probes.45
Annex B (informative) Calibration block for angle-beam probes .48
Page 3
Foreword
This European Standard 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 November 2001, and conflicting national standards shall be withdrawn at the latest
by November 2001.
This standard consists of the following parts :
EN 12668-1, Non-destructive testing - Characterization and verification of ultrasonic examination equipment -
Part 1: Instruments
EN 12668-2, Non-destructive testing - Characterization and verification of ultrasonic examination equipment -
Part 2: Probes
EN 12668-3, Non-destructive testing - Characterization and verification of ultrasonic examination equipment -
Part 3: Combined equipment
Annex A is normative. Annex B 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, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
Page 4
1 Scope
This European standard covers probes used for ultrasonic non-destructive examination in the following categories with
centre frequencies in the range 0,5 MHz to 15 MHz, focusing and without focusing means:
a) single or dual transducer contact probes generating compressional or shear waves ;
b) immersion probes.
Where material dependent ultrasonic values are specified in this 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.
Periodic tests for probes are not included in this standard. Routine tests for the verification of probes using on-site
methods are given in EN 12668-3.
If parameters in addition to those specified in EN 12668-3 are to be verified during the probe's life time, as agreed upon
by the contracting parties, the methods of verification for these additional parameters should be selected from those
given in this standard.
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 1330-4, Non destructive testing - Terminology - Part 4 : Terms used in ultrasonic testing.
EN 12223, Non-destructive testing - Ultrasonic examination - Specification for calibration block No. 1.
EN 12668-1, Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part
1 : Instruments.
EN 12668-3, Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part
3 : Combined equipment.
EN 27963, Welds in steel - Calibration block No. 2 for ultrasonic examination of welds (ISO 7963:1985).
EN ISO 9001, Quality systems - Model for quality assurance in design, development, production, installation and
servicing (ISO 9001:1994).
EN ISO 9002, Quality systems - Model for quality assurance in production, installation and servicing (ISO
9002:1994).
3 Terms, definitions, symbols and abbreviations
For the purposes of this European Standard the terms and definitions given in EN 1330-4 apply, together with the
following terms and definitions.
3.1
dead zone
depth of the zone immediately beneath the coupling surface of the work piece, in which it is not possible to detect a
given reflector
3.2
focal distance; (nearfield length)
point on the acoustical axis where the acoustic pressure is at its maximum
Page 5
3.3
horizontal plane of a sound beam
with angle-beam probes the plane perpendicular to the vertical plane of sound beam including the acoustical axis in
the material
3.4
operating frequency, f ; (centre frequency)
o
in the frequency spectrum of an echo the upper and lower cut-off-frequencies are determined at -6 dB compared to
the maximum amplitude. With these upper and lower frequencies f and f the centre frequency is calculated as :
u l
f f f
o u l
3.5
peak-to-peak amplitude, h
maximum deviation between the largest positive and the largest negative cycles of the pulse (see Figure 1)
3.6
probe data sheet
sheet giving information on probe performance which accompanies each probe. The data sheet need not
necessarily be a test certificate of individual probe performance
3.7
pulse duration
time interval over which the modulus of the unrectified pulse amplitude exceeds 10 % of its maximum amplitude, as
shown in Figure 1
3.8
reference side
reference side is the right side of an angle beam probe looking in the direction of the beam, unless otherwise
specified by the manufacturer
3.9
relative bandwidth, f
rel
ratio of the difference of the upper and lower cut-off frequencies f and f and the centre frequency f in percent
u l o
f = [(f - f )/f ] 100 %
rel u l o
3.10
squint angle for straight-beam probes,
deviation between the axis of the beam and a perpendicular to the coupling surface at the emission point
(see Figure 2)
For angle-beam probes
angle between the sides of the probe housing and the measured beam axis, projected onto the plane of the probe
face (see Figure 3)
3.11
transducer
element in the probe which transforms electrical oscillations to mechanical oscillations and vice versa, in most
cases piezoelectric elements
3.12
vertical plane of a sound beam
with angle-beam probes the plane in which the sound beam axis in the probe wedge and the sound beam axis in
the inspected component both lie
Page 6
4 General requirements for compliance
A probe complies with this standard if it satisfies the following conditions:
a) the probe shall meet the technical requirements of this standard ;
b) the probe carries a unique serial number, showing operating frequency, transducer size, angle, and wave
mode, or a permanent reference number from which this information can be traced ;
c) a data sheet is available for the appropriate type and series of probes which gives the performance in
accordance with clause 5 of this standard.
The quality of probes will be assured in one of the following ways :
a) where a large number of identical probes are manufactured under a quality management system, e.g.
EN ISO 9001 and EN ISO 9002, measurements are made on a statistically selected number of probes. The
manufacturer supplies a data sheet which includes the values of the specified parameters with tolerances ;
b) by issuing a declaration of conformity quoting the results of measurements made on an individual probe. This
is suitable where only a small number of probes of each type is manufactured or where probes are required for
special applications.
5 Manufacturer's technical specification for probes
Table 1 gives the list of information to be reported by a manufacturer in a data sheet for all probes within the scope of
this standard (I = Information, M = Measurement, C = Calculation). The data sheet shall also contain information
concerning the instrument used for the test, its settings and coupling conditions etc.
The manufacturer shall also state the operating temperature range of the probe, and any special conditions for storage
or protection during transport.
The supplier and the customer can agree where necessary to preclude some of the information and/or include some
other details not included in Table 1.
For probes intended for use at elevated temperatures the manufacturer shall provide information on the maximum
operating temperature in relation to the time of use, and the effect of temperature on the sensitivity and on the beam
angle.
Page 7
Table 1 — List of information to be given in a data sheet
Category of probe
Contact Immersion
Straight beam Angle beam Straight
Information Compressional Shear Compressional Shear Compressional
to be given Single Double Single Single Double Single Double Single
non-f. focus. non-f. focus. non-f. non-f. focus. non-f. focus. non-f. focus. non-f. focus. non-f. fo
...
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