EN 583-3:1997

Foreword
1 Scope
2 Normative references
3 Definitions
4 Principles of the examination
    4.1 Basic techniques and set-up
    4.2 Capability of detection of imperfections
    4.3 Requirements for geometry and access
    4.4 Effects of variation in coupling, angulation and
          alignment of probe
5 Examination technique
    5.1 General
    5.2 Sensitivity setting
    5.3 Scanning
    5.4 Evaluation of imperfections
    5.5 Determination of attenuation coefficient

This part of the standard specifies the principles of transmission techniques. Transmission techniques can be used for: - detection of imperfections; - determination of attenuation. The general principles required for the use of ultrasonic examination of industrial products are described in part 1 of this standard. The transmission technique is used for examination of flat products, e.g. plates and sheets. Further, it is used for examinations e.g.: - where the shape, dimensions or orientation of possible imperfections are unfavourable for direct reflection; - in materials with high attenuation; - in thin products.