00272116 PDF Li ce ns ed C op y A ki n K ok sa l, B ec ht el L td , 1 9 M ar ch 2 00 3, U nc on tr ol le d C op y, ( c) B S I BRITISH STANDARD BS EN 27963 1992 ISO 7963 1985 Specification for Calibrat[.]
British Standard A single copy of this British Standard is licensed to Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Akin Koksal 19 March 2003 This is an uncontrolled copy Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk BRITISH STANDARD Specification for Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Calibration block No for ultrasonic examination of welds This European Standard EN 27963:1992 has the status of a British Standard BS EN 27963:1992 ISO 7963:1985 BS EN 27963:1992 Cooperating organizations Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries This British Standard, having been prepared under the direction of the General Mechanical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 June 1992 © BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference GME/23 Draft for comment 83/71087 DC ISBN 580 20472 Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y France Association franỗaise de normalisation Germany Deutsches Institut für Normung e.V Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugs da Qualidade Spain Asociación Espola de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd No Date Comments BS EN 27963:1992 Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Contents Cooperating organizations National foreword Foreword Introduction Scope and field of application References Dimensions Material Preparation Method of use Annex A National appendix NA (informative) Figure Figure 2a) Figure 2b) Figure 3a) Figure 3b) Figure Figure Figure Figure © BSI 10-1999 Page Inside front cover ii 3 3 3 Inside back cover 6 6 6 7 i BS EN 27963:1992 National foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee and is the English language version of EN 27963:1992 “Welds in steel — Calibration block No for ultrasonic examination of welds” published by the European Committee for Standardization (CEN) EN 27963:1992 is identical with ISO 7963:1985 published by the International Organization for Standardization (ISO) National appendix NA gives the constitution of the committees responsible for UK participation in the preparation of this standard 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 Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 8, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 10-1999 EUROPEAN STANDARD EN 27963 NORME EUROPÉENNE April 1992 EUROPÄISCHE NORM UDC 621.791.053:669.14:620.179.16 Descriptors: Steels, welding, welded joints, ultrasonic tests, calibration, reference sample, dimensions English version Welds in steel — Calibration block No for ultrasonic examination of welds (ISO 7963:1985) Schweißverbindungen in Stahl — Kalibrierkưrper Nr zur Ultraschallprüfung von Schweißverbindungen (ISO 7963:1985) Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Soudures sur acier — Bloc d’étallonage no pour l’ examen par ultrasons des soudures (ISO 7963:1985) This European Standard was approved by CEN on 1992-03-27 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 Central Secretariat 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 Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © CEN 1992 Copyright reserved to all CEN members Ref No EN 27963:1992 E EN 27963:1992 Foreword Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI In 1990, ISO 7963:1985 was submitted to the CEN Primary Questionnaire procedure Following the positive result of this procedure, the CEN Technical Board, agreed to submit ISO 7963:1985, without modifications, to Formal Vote The result of the Formal Vote was positive National standards identical to this European Standard shall be published at the latest by 92-10-31 and conflicting national standards shall be withdrawn at the latest by 92-10-31 In accordance with the CEN/CENELEC Common Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom © BSI 10-1999 EN 27963:1992 Introduction This calibration block differs in size and shape from the block described in ISO 2400 It is very much smaller and therefore lighter, and its geometry is much simpler It does not offer as much scope as the larger block; in particular it is not meant to check an ultrasonic flaw detector completely Its easy handling, however, makes it possible, during practical examination, to check simply, from time to time, the setting of the time base and the sensitivity of the ultrasonic equipment Moreover, it is suited to checking the beam angle and the probe index of miniature shear wave probes Scope and field of application Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI This International Standard lays down the dimensions, type of steel and directives for the use of block No for the calibration of ultrasonic equipment for the examination of welds in steel References ISO 468, Surface roughness — Parameters, their values and general rules for specifying requirements ISO 2400, Welds in steel — Reference block for the calibration of equipment for ultrasonic examination ISO 2604-4, Steel products for pressure purposes — Quality requirements — Part 4: Plates1) Dimensions The dimensions of the block, in millimetres, are given in Figure The tolerances are ± 0,1 mm, except on the length of the engraved scale where it is ± 0,5 mm NOTE The thickness of the block can be greater (see the Annex A) NOTE In Figure 1, Ra indicates the average roughness Ra is not very different from Rz; both are defined in ISO 468 Material The calibration block is made of steel of composition corresponding to P 18 of ISO 2604-4 Preparation The calibration block shall be homogeneous and free from defects revealed by ultrasonic examination (see the Annex A) 1) In order to obtain a fine structure and good homogeneity, the block, before final machining, shall be heat treated as follows: a) heating for 30 at 920 °C and water-quenching; b) re-heating for h at 650 °C and cooling in still air The thickness to be removed from all surfaces by machining after heat treatment shall be at least mm After the heat treatment, and without waiting for machining to end, the blocks shall undergo a further ultrasonic examination from two different directions at right angles to each other and in the direction of rolling All surfaces shall be machined lengthwise except the echo side, which shall be ground In order to prevent parasitic effects, the depth of the marks of the engraved scale shall be 0,1 ± 0,05 mm The length of the marks shall be mm and the tolerance on the positioning of the marks shall be ± 0,2 mm On completion of machining, a final ultrasonic examination shall be carried out Method of use 6.1 Setting of the time base To set the time base, the leading edge (left side) of successive echoes shall be made to coincide with the appropriate scale markings on the screen of the equipment The pulse-travel time depends on the velocity of ultrasonic waves in the material examined For the steel composition given in clause 4, the velocities of longitudinal and shear waves are (5 920 ± 30) m·s–1 and (3 255 ± 15) m·s–1, respectively 6.1.1 Calibration of time base up to 250 mm with a longitudinal wave probe The position of the probe on the calibration block is indicated in Figure 2a) Figure 2b) is a schematic representation of the screen appearance for calibration of a distance of 50 mm NOTE Depending on the probe and frequency used, difficulties may arise when calibrating distances greater than 10 times the thickness of the block At present at the stage of draft (Revision of ISO 2604-4:1975.) © BSI 10-1999 EN 27963:1992 6.1.2 Calibration of distance of 100 or 125 mm with a miniature shear wave probe The position of the miniature shear wave probe on the calibration block is shown in Figure 3a) for a distance of 125 mm and in Figure 3b) for a distance of 100 mm In Figure 3a) and Figure 3b) the screen appearances for the calibration of the two distances are also shown schematically NOTE Calibration of the distance of 125 mm is, however, preferable, since the linearity of the time base is better 6.2 Checking during examination A large number of factors exercise an influence on sensitivity setting (see the Annex A) Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI 6.2.1 Longitudinal wave probes — Sensitivity setting The probe can be placed in position “a” as indicated in Figure The oscillogram representing the successive echoes can be used as a reference for setting sensitivity It is also possible to use the reflection from the mm diameter hole, position “b” in Figure 4, the probe being placed so that the corresponding echo amplitude is at its maximum 6.2.2 Miniature shear wave probes 6.2.2.1 Sensitivity setting In this case, the maximum echo from the mm diameter hole can also be used (see Figure 5, position “a”) as a reference for setting sensitivity Similarly, it is possible to make use of the reflections from the cylindrical surfaces of radii of 50 mm and 25 mm respectively In this case there are two possibilities — In the first, by using a calibrated gain control, the amplitude of the echo from the cylindrical surface is initially set to 80 % of screen height and subsequently adjusted to the level desired (see Figure 5, position “b”) — In the second, without the use of a calibrated gain control, the successive echoes from the cylindrical surfaces can be used for the adjustment of sensitivity (see Figure 6) When checking probes, the acoustic coupling is an important factor and, when probes are compared, the same coupling medium shall be used 6.2.2.2 Determination of the position of the probe index The miniature shear wave probe is, as shown in Figure 3a) and Figure 3b), moved parallel to the main faces of the calibration block until the amplitude of the echo from the cylindrical surface has reached its maximum The probe index then coincides with the centre mark of the millimetre scale 6.2.2.3 Determination of beam angle In this case, use is made of the echo obtained from the mm diameter hole The miniature shear wave probe is, as before, moved parallel to the main faces of the calibration block until the amplitude of the echo from the mm diameter hole has reached its maximum The beam angle is obtained either by direct reading of the scale engraved on the calibration block, as shown in Figure 7, or by interpolation if the position found does not coincide with one of the scale lines The positions shown in Figure make it possible to check beam angles of 45°, 60° and 70° probes © BSI 10-1999 Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI EN 27963:1992 Figure © BSI 10-1999 EN 27963:1992 Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Figure 2a) Figure 2b) Figure 3a) Figure 3b) Figure Figure © BSI 10-1999 Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI EN 27963:1992 Figure © BSI 10-1999 Figure 7 EN 27963:1992 Annex A Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI A.1 Thickness of the block for calibration of “non-miniature” probes If necessary, a thicker block may be used, for example 20 or 25 mm thick A.2 Ultrasonic inspection of material before and after final machining Two inspections with a longitudinal wave probe (crystal diameter 10 mm; frequency MHz) are recommended: a) With the probe positioned as shown in Figure 2a), the amplitude of the back echo for a path length of at least 50 mm shall be greater than the grass level produced by the grain structure when the latter is increased by at least 50 dB b) No echo arising from any defect in the homogeneity of the material shall have an amplitude greater than the grass level A.3 Factors to be taken into consideration for the setting of sensitivity These factors can be divided into the following four main groups: a) equipment: pulse energy, frequency, pulse shape, amplification, etc.; b) probe used: type, size, acoustic impedance, crystal damping, polar diagram, etc.; c) material to be examined: surface condition (in connection with coupling), kind of material (its absorption), etc.; d) defect analysis: shape, orientation, nature, etc © BSI 10-1999 BS EN 27963:1992 National appendix NA (informative) Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI The United Kingdom participation in the preparation of this European Standard was entrusted by the General Mechanical Engineering Standards Policy Committee (GME/-) to Technical Committee GME/23 upon which the following bodies were represented: Aluminium Federation Associated Offices Technical Committee Association of Consulting Engineers BEAMA Ltd BNF Metals Technology Centre British Airways British Chemical Engineering Contractors Association British Gas plc British Institute of Non-destructive Testing British Photographic Association British Steel Industry Electricity Industry in United Kingdom Health and Safety Executive Institute of Physics Institute of Quality Assurance Light Metal Founders’ Association Lloyd’s Register of Shipping Ministry of Defence NAMAS Power Generation Contractors’ Association (BEAMA Ltd.) Royal Society of Chemistry Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited Steel Castings Research and Trade Association The Welding Institute © BSI 10-1999 BS EN 27963:1992 ISO 7963:1985 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: 020 8996 9000 Fax: 020 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards Licensed Copy: Akin Koksal, Bechtel Ltd, 19 March 2003, Uncontrolled Copy, (c) BSI Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: 020 8996 9001 Fax: 020 8996 7001 In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel: 020 8996 7111 Fax: 020 8996 7048 Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel: 020 8996 7002 Fax: 020 8996 7001 Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained BSI 389 Chiswick High Road London W4 4AL If permission is granted, the terms may include royalty payments or a licensing agreement Details and advice can be obtained from the Copyright Manager Tel: 020 8996 7070