SUBSEA PRECOMMISSIONING—2 (Conclusion): Growth in pipeline scale prompts early precommissioning planning

Marco Casirati Jarleiv Maribu Nord Stream AG Zug, Switzerland John Grover Daniel Fehnert Baker Hughes PPS Dubai As subsea hydrocarbon pipelines have grown in scale, plans for their precommissioning have been incorporated early in project development. The Nord Stream natural gas pipeline, crossing the Baltic Sea from Vyborg, Russia, to Lubmin (near Greifswald), Germany, successfully used this approach. Part 1 of this article (OGJ, May 6, 2013, pp. 100) detailed the planning, engineering, and preparation for Nord Stream's precommissioning. This second part continues this discussion before looking at relevant field experience gained during project execution. Sealing pigs All pigs were spec...

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