DIN 54125:1989-01

1 Scope and field of application
2 Concepts
3 Quantities and symbols
4 Equipment, probes, and ancillary equipment
      4.1 General
      4.2 Time base range
      4.3 Echo width
      4.4 Scanning sensitivity
      4.5 Ancillary equipment
5 Examination levels
6 Test conditions and surface preparation
      6.1 General
      6.2 Test conditions
      6.3 Preparation of test surfaces
7 Calibration of equipment
      7.1 General
      7.2 Recording level
8 Test procedure
      8.1 General
      8.2 Probe movement
      8.3 Shape-related echoes
      8.4 Location of imperfection
      8.5 Sizing of imperfection
9 Test report
      9.1 General
      9.2 General information
      9.3 Information on testing technique
      9.4 Test results

Specifies a method of ultrasonic examination of fusion welded joints in metallic materials which exhibit a relatively low ultrasonic attenuation (especially that due to scatter); the test objects shall have a minimum thickness of 10 mm and a plane or curved surface. It mainly applied to welded joints with a full penetration weld. Where the values specified are a function of the material, they are based on a sound velocity in steel of (5920 + 30) m/s for longitudinal waves and (3255 + 15) m/s for transverse waves. This shall be taken into account when examining materials in which the sound propagation has a different velocity.