1、Non- de structive testing Ultrasonic testing of steel bars The European Standard EN 10308:2001 has the status ofa British Standard ICs 77.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN i 0308:2002 BS EN 10308:2002 Amd. No. National foreword Date Comments This Bri
2、tish Standard is the official English language version of EN 10308:2001. The UKparticipation in its preparation was entrusted to Technical Committee ISE/72, Methods of physical and metallographic testing, which has the responsibility to: - - aid enquirers to understand the text; present to the respo
3、nsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its
4、 secretary. Cr oss-r e fer enc e s The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the B
5、SI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This B
6、ritish Standard. having - been prepared under the direction of the Engineering Summary Of pages Sector Policv and Stratew This document comprises a front cover, an inside front cover, the EN title page, -_ Committee, was published pages 2 to 16. an inside back cover and a back cover. under the autho
7、rity of the Standards policy and Strategy Committee on 29 January 2002 The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 29 January 2002 ISBN O 580 38966 9 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10308 November 2001 ICs 77.040.20; 77.14
8、0.60 English version Non-destructive testing - Ultrasonic testing of steel bars Essais non-destructifs - Contrle par ultrasons des barres en acier Zerstrungsfreie Prfung - Ultraschallprfung von Stben aus Stahl This European Standard was approved by CEN on 30 September 2001 CEN members are bound to c
9、omply with the CENKENELEC 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 Managemen
10、t 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 offic
11、ial 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 EUROPI
12、SCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10308:2001 E EN 10308:2001 (E) Contents Page Foreword . 3 1 2 3 4
13、 5 6 7 8 8.1 8.2 8.3 8.4 8.5 9 10 11 12 13 13.1 13.2 13.3 13.4 14 14.1 14.2 15 16 17 . Normative references Terms and definitions . Items for agreements Procedure . . 4 5 . Personnel qualification 6 7 7 7 7 Reference blocks 7 7 Routine calibration and checking . 8 . . Surface condi ti on . . Sensiti
14、vity setting . 8 8 8 8 8 . . Scanning speed 9 Classification . Recording level and acceptance criteria Sizing . . Test report . 14 Annex A (informative) List of equivalent terms in several European languages . 15 Bibliography . 16 2 EN 10308:2001 (E) Foreword This European Standard has been prepared
15、 by Technical Committee ECISS/TC 2, Steel - Physico-chemical and 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 May 2002, and c
16、onflicting national standards shall be withdrawn at the latest by May 2002. Annex A is informative. This standard includes a Bibliography. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard:
17、Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 EN 10308:2001 (E) 1 Scope This European Standard describes the techniques to be used for the manual, p
18、ulse-echo, ultrasonic testing of steel bars of diameter or equivalent thickness less or equal to 400 mm or equivalent section. Mechanized, semi-automatic or automatic techniques may be used but should be agreed between the purchaser and the supplier. 2 Normative references This European Standard inc
19、orporates 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 E
20、uropean 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 473, Non-desfrucfive fesfing - Qualificafion and cerificafion of NDT personnel - General principles. EN 583-2, Non-desfr
21、ucfive fesfing - Ulfrasonic examinafion - Par 2: Sensifivify and range seffing. EN 583-5, Non-desfrucfive fesfing - Ulfrasonic examinafion - Par 5: Characferizafion and sizing of discon finuifies. EN 1330-4, Non-desfrucfive fesfing - Terminology - Par 4: Terms used in ulfrasonic fesfing. EN 12223, N
22、on-desfrucfive fesfing - Ulfrasonic examinafion - Specificafion for calibrafion block no. 1. EN 12668-1 , Non-desfrucfive fesfing - Characferizafion and verificafion of ulfrasonic examinafion equipmenf - Par 1: Insfrumenfs. EN 12668-2, Non-desfrucfive fesfing - Characferizafion and verificafion of u
23、lfrasonic examinafion equipmenf - Par 2: Probes. EN 12668-3, Non-desfrucfive fesfing - Characferizafion and verificafion of ulfrasonic examinafion equipmenf - Par 3: Combined equipmenf. 3 Terms and definitions Definitions for general terms of non-destructive testing can be found in other European St
24、andards, e.g. EN 1330-1 and EN 1330-2. For the purposes of this European Standard, the following terms and definitions given in EN 1330-4 apply, together with the following. 3.1 manual testing testing by an operator applying an ultrasonic probe, or probes, to the product surface, manually executing
25、the appropriate scanning pattern on the product surface and assessing ultrasonic signal indications on the electronic equipment screen either by direct viewing or by built-in signal amplitude alarm devices 3.2 automatic and semi-automatic testing testing using a mechanized means of applying the ultr
26、asonic probe or probes to, and executing the appropriate scanning pattern on the flat product surface, together with ultrasonic signal indication evaluation by electronic means NOTE performs basic equipment operation functions. Such testing can be either fully automatic with no operator involvement,
27、 or semi-automatic when the operator A list of equivalent terms in several European languages in given in Annex A. 4 EN 10308:2001 (E) 4 Items for agreements The following aspects concerning ultrasonic testing shall be agreed between the purchaser and supplier at the time of the enquiry or order: a)
28、 the manufacturing stage(s) at which ultrasonic testing shall be performed (see clause IO); b) the volume(s) to be tested and whether grid scanning coverage or complete scanning coverage is required (see clause 13); c) the Quality Class required, or the Quality Classes and the zones to which they ap
29、ply (see clause 15); d) the applicable evaluation level and acceptance criteria if different from those detailed in Tables 2 and 3; e) whether any special scanning coverage, equipment or couplant is required in addition to that detailed in clauses 8 and 13; f) the scanning technique to be used if no
30、t manual; g) the sizing techniques to be used for extended discontinuities (see clause 16); h) the technique(s) to be used for setting sensitivity (see clause 12); i) whether the test is to be conducted in the presence of the purchaser or his representative; j) whether a written procedure shall be s
31、ubmitted for approval by the purchaser (see clause 6). 5 Principle The method used is based on the reflection of ultrasonic waves (generally longitudinal), the direction of which is approximately perpendicular to the surface of the product. The examination consists of: a) locating and evaluation of
32、discontinuity by comparing the amplitude of the discontinuity echo with the amplitude of the echo of a flat-bottomed hole of a given diameter and located at the same depth as the discontinuity. NOTE flat-bottomed hole are taken into consideration. Only those discontinuities giving an echo in amplitu
33、de equal to or greater than that obtained with the reference b) determining the area of the discontinuity according to the -6 dB beam width technique. If areas with particular permeability are located, the testing conditions shall be adjusted in order to test these areas with the required sensitivit
34、y level. The examination is carried out during the first ultrasonic scan (first back wall echo) for all the product thicknesses or diameter and from one side only. 5 EN 10308:2001 (E) 6 Procedure The inspection is normally carried out in the place of production or on the premises of the supplier. If
35、 specified on the order, the inspection may take place in the presence of the purchaser or his representative). Ultrasonic testing shall be performed in accordance with a written procedure. Where specified in the enquiry or order, the written procedure shall be submitted to the purchaser for approva
36、l prior to testing. This written procedure shall be in the form of: a) a product specification or; b) c) a procedure written specifically for the application or; this European Standard may be used if it is accompanied by examination details specific to the application. The procedure shall contain th
37、e following details as a minimum requirement: description of the item to be examined; reference documents; qualification and certification of examination personnel; stage of manufacture at which the examination is carried out; examination zones specified in terms of the applicable Quality Classes; a
38、ny special preparation of scanning surfaces, if applicable; cou plant ; description of examination equipment; calibration; scanning plan; description and sequence of examination operations; recording level; characterization of discontinuities; acceptance criteria; examination report. Personnel quali
39、fica tion It is assumed that ultrasonic testing is performed by qualified and capable personnel. In order to prove this qualification, it is recommended to certify the personnel in accordance with EN 473 or equivalent. ) In this case, all steps should be taken to ensure that the production process i
40、s not disturbed. 6 EN 10308:2001 (E) 8 Ultrasonic test equipment 8.1 Instrument Instrument for manual testing shall feature A-scan presentation and shall comply with the requirements of EN 12668-1. 8.2 Probe 8.2.1 General Single transducer probes and double transducer probes shall conform to the req
41、uirements of EN 12668-2. Additionally, other types of probes may be used. Such supplementary probes need not to comply with EN 12668-2 requirements. 8.2.2 Contouring Probes shall be contoured when required according to EN 583-2. 8.2.3 Nominal frequency Probes shall have a nominal frequency in the ra
42、nge from 1 MHz to 6 MHz. 8.2.4 Type of Probes The greatest transducer dimension shall be in the range from 9 mm to 25 mm, unless otherwise agreed. Double transducer probes can be used for bars with sizes up to 150 mm diameters or thickness. Single transducer probes shall be used for bars with diamet
43、er or thickness greater than 60 mm. 8.3 Calibration blocks Calibration blocks shall conform to the requirements detailed in EN 12223. 8.4 Reference blocks References blocks shall be made from a material having similar acoustic properties to the product to be examined. The surface condition of the re
44、ference block shall be representative of the surface condition of the bars to be examined. Unless otherwise specified the reference block shall contain at least three reflectors covering the entire depth range under examination. The form of the reference block will depend upon the application. The b
45、ottom of the holes shall be as flat as practicable, parallel to the ultrasound entry surface and free from pits or score marks that significantly degrade its ultrasonic reflectivity. The tolerance on the diameter of the flat-bottomed hole or width of recess shall be I5 %. 8.5 Couplant The couplant u
46、sed shall be appropriate to the application. The same type of couplant shall be used for calibration, setting sensitivity, scanning and evaluation of discontinuities. After examination, couplant shall be removed if its presence could adversely affect later manufacturing or inspection operations or t
47、he integrity of the component. NOTE Water is normally used but other coupling media may be used at the discretion of the supplier. 7 EN 10308:2001 (E) 9 Routine calibration and checking The combined equipment (instrument and probes) shall be calibrated and checked in accordance with the requirements
48、 detailed in EN 12668-3. 10 Stage of manufacture Ultrasonic testing shall be performed after the final quality heat treatment unless otherwise agreed at the time of enquiry and order. 11 Surface condition Scanning surfaces shall be free from paint, non-adhering scale, dry couplant, surface irregular
49、ities or any other substance which could reduce coupling efficiency, hinder the free movement of the probe or cause errors in interpretation. The surface condition shall be considered acceptable providing the specified quality class can be achieved. 12 Sensitivity setting Sensitivity shall be sufficient to ensure the detection of the smallest discontinuities required by the recording/evaluation levels (see Tables 2 and 3). One of the following techniques shall be used to establish sensitivity for scanning with a particular probe. The procedure to be used in each case sh
