Accurate non-destructive testing of rails and weld joints using UT, TOFD and Phased Array technology for early internal defect detection.
Request nowApplication & Significance
Ultrasonic rail inspection enables early detection of internal defects in rails, weld joints, and profile transitions. It is used in the railway sector for preventive maintenance and allows continuous monitoring along track sections. Typically, weld seams at rail joints are inspected manually, while longer sections can be recorded automatically.
During ultrasonic rail inspection, one or more probes are moved over the rail, usually with couplants such as water or gel. The emitted sound waves penetrate the material and are reflected at defects or interfaces. Techniques like Phased Array allow electronic control of the sound beam angle, while TOFD enables exact localization and depth measurement of defects. This allows reliable identification of cracks, bonding defects, inclusions, and material inconsistencies.
In complex geometries such as switches or crossings, inspection depth may be limited. Corrosion and uneven surfaces also affect signal quality. In such cases, complementary testing with other methods like RT or VT is advisable. For weld seam inspections in the track area, precise calibration to the respective rail profile is required.
Ultrasonic testing of rails is governed among others by DIN EN 16729-1 and DIN EN ISO 17640. In the railway sector, the specifications of Deutsche Bahn (e.g., guideline 821.2005) must also be observed, especially for safety-relevant inspections and documentation.
If you would like to commission a rail inspection, please provide us with the profile, material, length, environment, and desired testing technique. We will promptly prepare a suitable concept for you.
