EN 27963:1992

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schweißverbindungen in Stahl - Kalibrierkörper Nr. 2 zur Ultraschallprüfung von Schweißverbindungen (ISO 7963:1985)Soudures sur acier - Bloc d'étalonnage no 2 pour l'examen par ultrasons des soudures (ISO 7963:1985)Welds in steel - Calibration block No. 2 for ultrasonic examination of welds (ISO 7963:1985)25.160.40Varjeni spoji in variWelded jointsICS:Ta slovenski standard je istoveten z:EN 27963:1992SIST EN 27963:1996en01-januar-1996SIST EN 27963:1996SLOVENSKI
STANDARD
w International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEIK,!IYHAPOCJHAR OPTAHM3AUMR fl0 CTAH~APTM3ALWl*ORGANISATlON INTERNATIONALE DE NORMALISATION Welds in steel - Calibration block No. 2 for ultrasonic extimination of welds Soudures SW acier - Bloc d’etalonnage no 2 pour l’examen par ultrasons des soudures First edition - 19854945 UDC 620.179.16 : 53.089.6 : 621.791.053 Ref. No. ISO 79634985 (EI Descriptors: steels, welding, welded joints, tests, ultrasonic tests, calibration, reference Sample, dimensions. 63 i3! 0 cn Price based on 6 pages SIST EN 27963:1996

Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 7963 was prepared by Technical Committee ISO/TC 44, Welding and allied processes. 0 International Organkation for Standardkation, 1985 Printed in Switzerland SIST EN 27963:1996

INTERNATIONAL STANDARD ISO 7963-1985 (EI Welds in steel - Calibration block No. 2 for ultrasonic examination of .welds 0 Introduction This calibration block differs in size and shape from the block described in ISO 2400. lt is very much smaller and therefore lighter, and its geometry is much simpler. lt 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. 1 Scope and field of application This International Standard lays down the dimensions, type of steel and directives for the use of block No. 2 for the calibration of ultrasonic equipment for the examination of welds in steel. 2 References ISO 468, Surface roughness - Parameters, their values and general rules for specifying requiremen ts. ISO 2400, Welds in steel - Reference block for the calibration of equipment for ultrasonic examination. ISO 260414, Steel products for pressure purposes - Quality requiremen ts - Part 4: Plates. 1 ) 3 Dimensions The dimensions of the block, in millimetres, are given in tigure l. The tolerantes are Ifi: 0,l mm, except on the length of the engraved scale where it is & 0,5 mm. NOTES 1 The thickness of the block tan be greater (sec the annex). 2 In figure 1, R, indicates the average roughness. R, is not very dif- ferent from R, ; both are defined in ISO 468. 4 Material The calibration block is made of steel of composition cor- responding to P 18 of ISO 2604/4. 5 Preparation The calibration block shall be homogeneous and free from defects revealed by ultrasonic examination (sec the annex). 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 min at 920 OC and water-quenching ; b) re-heating for 2 h at 650 OC and cooling in still air. The thickness to be removed from all surfaces by machining after heat treatment shall be at least 2 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,l & 0,05 mm. The length of the marks shall be 6 mm and the tolerante on the positioning of the marks shall be +0,2 mm. On completion of machining, a final ultrasonic examination shall be carried out. 6 Method of use 6.1 Setting of the time base To set the time base, the leading edge Heft side) of successive echoes shall be made to coincide with the appropriate scale markings on the Screen of the equipment. The
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