According to Rosen, the offshore in-line inspection (ILI) of the 36 inch-diameter segment of the Gulfstream pipeline will be the longest offshore ILI in the history of the United States, stretching 690 km across the Gulf of Mexico.

Previously, Rosen was the first to inspect the Langeled Pipeline System, spanning from Nyhamna, Norway, to Easington, United Kingdom, which until 2011 was the world’s longest subsea pipeline at 1,172 km in length and 42–44 inches in diameter.

The Gulfstream Pipeline System – a 50-50 joint venture between Williams and Spectra Energy – is a multi-diameter pipeline that...