Pipelines and Risers Weld Inspection
Automated UT (AUT) with the phased-array technology is currently the best NDT method to accurately inspect girth welds for offshore as well as onshore projects.

We have developed a vast expertise on many materials, fabrication processes, and inspection techniques to help you inspect girth welds easily and quickly. We are very aware that some materials and fabrication processes pose different inspection challenges; to overcome them we have mastered a number of testing methods.

Technologies are used alone or in combination with a variety of techniques

- Phased-array ultrasound (PAUT)
- - - Zone discrimination
- - - Back diffraction
- - - PA multishooting
- - - Electronic scanning (L-Scan, S-Scan)

- Time of flight diffraction (TOFD)

- Transverse indication detection

AUT is suitable for the following pipelines materials and more: carbon steel, stainless steel, duplex and superduplex stainless steel and inconel. It also covers a large range of pipe diameters (0.5 in. to 80 in.) and wall thicknesses (6 mm to 50 mm).


Our NDT solutions are adapted to many fabrication processes and weld bevels:
- Seam and seamless
- Weld overlay (clad)
- Metallurgical bonding
- CRC, J, …
- And more

The accuracy of the defect position and sizing capability of AUT provides better result interpretation than radiography. This accuracy level allows the use of engineering critical assessment (ECA). ECA provides you with acceptance criteria with which you can create a tolerance table for acceptable flaws. It has been largely proven that working with ECA reduces the weld repair rate which results in faster operation and lower costs.

AUT is also a very fast inspection method. This is particularly important in offshore projects as the scanning speed easily reaches 100 mm/s and this with excellent repeatability.

Inspection results are displayed in real-time on screen. Weld evaluation can therefore start while scanning is being completed. Digital signal processing gives us a 3dimensional view of the weld, which helps determine the position of indications.