BS DD174(1988) : 1988
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
GUIDE TO THE CALIBRATION AND SETTING UP OF THE ULTRASONIC TIME OF FLIGHT DIFFRACTION (TOFD) TECHNIQUE FOR THE LOCATION AND SIZING OF FLAWS
Hardcopy , PDF
12-15-1993
English
01-01-1988
Gives guidance for the calibration and installation of equipment for the use of the two transducer version of TOFD, both to locate and size flaws as a result of linear scanning. May be applied to a wide range of test geometries. Covers principles of the technique, equipment required, basic considerations, setting-up procedures, accuracy of measurement, errors due to the lateral uncertainty in the flaw position, errors due to index point migration, scanner induced and replacement errors, estimation of reflector depth and height and interpretation of the results.
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