A North American customer required an inspection of a dual-diameter pipeline owned and operated by the energy player – this was part of their overall global integrity program. The line, approximately 1,800 km in length, and required axial cracking and metal loss inspection. The pipeline consisted of 29 sections of varying lengths. However, a particular challenge was posed by the fact that it featured both 36” and 48” diameters, creating a 33 percent variation. In addition, further boundary conditions, such as tight 1.5D bends, had to be taken into account. To ensure a smooth processes and first run success.