BS EN 12668-2-2010 无损检验.超声波检验设备的品质鉴定和验证.第2部分探头.pdf

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1、 - - - - - - - - - - - - EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12668-2 February 2010 ICS 19.100 Supersedes EN 12668-2:2001 English Version Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 2: Probes Essais non destructifs - Caractri

2、sation et vrification de lappareillage de contrle par ultrasons - Partie 2: Traducteurs Zerstrungsfreie Prfung - Charakterisierung und Verifizierung der Ultraschall-Prfausrstung - Teil 2: Prfkpfe This European Standard was approved by CEN on 25 December 2009. CEN members are bound to comply with the

3、 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 Management Centre

4、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 Management Centre has the same status as the official v

5、ersions. 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,

6、 Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for

7、CEN national Members. Ref. No. EN 12668-2:2010: E - - - - - - EN 12668-2:2010 (E) 2 Contents Page Foreword 4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 General requirements for compliance .7 5 Technical specification for probes 7 6 Test equipment . 11 6.1 Electronic equipment .

8、11 6.2 Test blocks and other equipment . 11 7 Performance requirements for probes . 14 7.1 Physical aspects . 14 7.1.1 Method . 14 7.1.2 Acceptance criterion 14 7.2 Radio frequency pulse shape 14 7.2.1 Method . 14 7.2.2 Acceptance criterion 14 7.3 Pulse spectrum and bandwidth . 14 7.3.1 Method . 14

9、7.3.2 Acceptance criteria . 15 7.4 Relative pulse-echo sensitivity . 15 7.4.1 Method . 15 7.4.2 Acceptance criterion 15 7.5 Distance-amplitude curve 15 7.5.1 Method . 15 7.5.2 Acceptance criterion 16 7.6 Electrical impedance 17 7.6.1 Method . 17 7.6.2 Acceptance criteria . 17 7.7 Beam parameters for

10、 immersion probes . 17 7.7.1 General . 17 7.7.2 Beam profile measurements performed directly on the beam . 18 7.7.3 Beam profile measurements made using an automated scanning system 20 7.8 Beam parameters for contact, straight-beam, single transducer probes . 21 7.8.1 General . 21 7.8.2 Beam diverge

11、nce and side lobes 22 7.8.3 Squint angle and offset 23 7.8.4 Focal distance (near field length) 23 7.8.5 Focal width 24 7.8.6 Focal length . 24 7.9 Beam parameters for contact angle-beam single transducer probes. 25 7.9.1 General . 25 7.9.2 Index point . 25 7.9.3 Beam angle and beam divergence 25 7.

12、9.4 Squint angle and offset 26 7.9.5 Focal distance (near field length) 27 7.9.6 Focal width 28 7.9.7 Focal length . 28 7.10 Beam parameters for contact, straight beam, dual-element probes . 29 7.10.1 General . 29 7.10.2 Cross talk . 29 7.10.3 Distance to sensitivity maximum (focal distance) 29 7.10

13、.4 Axial sensitivity range (focal length) 29 - - - - - - EN 12668-2:2010 (E) 3 7.10.5 Lateral sensitivity range (focal width) . 30 7.11 Beam parameters for contact angle beam, dual-element probes 30 7.11.1 General 30 7.11.2 Cross talk . 31 7.11.3 Index point 31 7.11.4 Beam angle and profiles . 31 7.

14、11.5 Distance to sensitivity maximum (focal distance) . 32 7.11.6 Axial sensitivity range (focal length) . 32 7.11.7 Lateral sensitivity range (focal width) . 32 Annex A (normative) Calculation of near field length of non-focusing probes 45 A.1 General 45 A.2 Straight beam probes 45 A.3 Angle beam p

15、robes . 46 Annex B (informative) Calibration block for angle-beam probes . 48 Bibliography 52 - - - - - - EN 12668-2:2010 (E) 4 Foreword This document (EN 12668-2:2010) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing”, the secretariat of which is held by AFNOR. This Euro

16、pean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2010, and conflicting national standards shall be withdrawn at the latest by August 2010. Attention is drawn to the possibility that some of the eleme

17、nts 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 12668-2:2001. EN 12668, Non-destructive testing Characterization and verification of ultrasonic examination equipment,

18、 consists of the following parts: Part 1: Instruments Part 2: Probes 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 Standa

19、rd: 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 K

20、ingdom. - - - - - - EN 12668-2:2010 (E) 5 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

21、generating compressional or shear waves; b) single transducer immersion probes. Where material-dependent ultrasonic values are specified in this document they are based on steels having a sound velocity of (5 920 50) m/s for longitudinal waves, and (3 255 30) m/s for transverse waves. Periodic tests

22、 for probes are not included in this document. 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 probes life time, as agreed upon by the contracting parties, the methods

23、 of verification for these additional parameters should be selected from those given in this document. 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 l

24、atest edition of the referenced document (including any amendments) applies. EN 1330-4:2010, Non-destructive testing Terminology Part 4: Terms used in ultrasonic testing EN 12668-1, Non-destructive testing Characterization and verification of ultrasonic examination equipment Part 1: Instruments EN I

25、SO 7963 1 ), Non-destructive testing Ultrasonic testing Specification for calibration block n 2 (ISO 7963:1985) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1330-4:2010 and the following apply. 3.1 dead zone depth of the zone immediately beneath th

26、e coupling surface of the work piece, in which it is not possible to detect a given reflector 3.2 focal distance near field length point on the acoustical axis where the acoustic pressure is at its maximum 3.3 horizontal plane of a sound beam plane perpendicular to the vertical plane of the sound be

27、am including the acoustical axis in the material 1) Under preparation. - - - - - - EN 12668-2:2010 (E) 6 3.4 operating frequency fo centre frequency arithmetic mean of upper and lower cut-off frequency 2 o lu ff f (1) NOTE In the frequency spectrum of an echo the upper and lower cut-off-frequencies

28、are determined at -6 dB compared to the maximum amplitude. 3.5 peak-to-peak amplitude h maximum deviation between the largest positive and the largest negative cycles of the pulse NOTE See Figure 1. 3.6 probe data sheet sheet containing the information required by this standard NOTE The data sheet n

29、eed not necessarily be a test certificate of 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 d

30、irection of the beam, unless otherwise specified by the manufacturer 3.9 relative bandwidth frel ratio of the difference between the upper and lower cut-off frequencies fu and fl and the centre frequency fo frel = (fu - fl)/fo 100 % NOTE The relative bandwidth is expressed in percent (%). 3.10 squin

31、t angle for straight-beam probes deviation between the axis of the beam and a perpendicular to the coupling surface at the emission point NOTE 1 See Figure 2. angle between the sides of the probe housing and the measured beam axis, projected onto the plane of the probe face NOTE 2 See Figure 3. 3.11

32、 vertical plane of a sound beam plane in which the sound beam axis in the probe wedge and the sound beam axis in the inspected component both lie - - - - - - EN 12668-2:2010 (E) 7 4 General requirements for compliance An ultrasonic probe complies with this standard if it satisfies the following cond

33、itions: a) the probe shall comply with Clause 7; b) either a declaration of conformity, issued by a manufacturer operating a certified quality management system, or issued by an organization operating an accredited test laboratory shall be available; NOTE It is recommended that the certification is

34、carried out in accordance with EN ISO 9001, or that the accreditation is carried out in accordance with EN ISO/IEC 17025. c) the probe shall be clearly marked to identify the manufacturer, and carry a unique serial number, showing operating frequency, transducer size, angle, or a permanent reference

35、 number from which this information can be traced; d) a technical specification (data sheet) for the appropriate type and series of probe which defines the performance criteria in accordance with Clause 5 shall be available. The quality of probes will be assured in one of the following ways: e) by i

36、ssuing a declaration of conformity based on statistical analysis where a number of identical probes are manufactured under a quality management system. The manufacturer shall supply a data sheet which includes the values of the specified parameters with tolerances; f) by issuing a declaration of con

37、formity quoting the results of measurements made on each probe. 5 Technical specification for probes Table 1 gives the list of information to be reported in a data sheet for all probes within the scope of this standard (I = Information, M = Measurement, C = Calculation). The data sheet shall also co

38、ntain information concerning the ultrasonic instrument used for the test, its settings and coupling conditions, etc. The operating temperature range of the probe, and any special conditions for storage or protection during transport shall also be stated in the data sheet. For probes intended for use

39、 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. - - - - - - - - - - - - - - - - - - - - - - - - EN 12668-2:2010 (E) 11 6 Test equipment 6

40、.1 Electronic equipment The ultrasonic instrument (or laboratory pulser/receiver) used for the tests specified in Clause 7 shall be of the type designated on the probe data sheet, and shall comply with EN 12268-1 as applicable. Where more than one type of ultrasonic instrument is designated the test

41、s shall be repeated with each of the additional designated types. Testing shall be carried out with the probe cables and electrical matching devices specified on the probe data sheet for use with the particular type of ultrasonic instrument. NOTE Probe leads more than about 2 m long could have significant effect on probe performance. In addition to the ultrasonic instrument or labo