Bad Vibes: Using Coatings to Eliminate Vortex-Induced Vibration of Riser Strings on Deep-Water Offshore Structures

From JPCL, February 2016

By Peter Bock

When the length of the riser piping on an oil production platform increases for structures in deep water, vortex-induced vibrations can crack joints in the riser string or rupture the riser pipe itself, causing a potentially disastrous oil spill. The author describes a project where coatings provided a preventative solution....

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Tagged categories: Corrosion protection; Fiberglass; Fiberglass Jacket System; Immersion service; Offshore; Program/Project Management; Shop-applied coatings

Comment from Jeff Bogran, (3/14/2016, 9:53 AM)

A known coatings genius, Mr Bock has provided both an enjoyable read and a technicality informative one. Thank you Peter for the article.

Comment from Warren Brand, (3/14/2016, 9:57 AM)

Hi Peter, really interesting and well-written. Would you mind contacting me directly with the company that made the paint? And what it was? I think I have an idea, but am not sure.

Comment from Peter Bock, (3/15/2016, 9:50 AM)

Jeff Bogran is a great Cajun, a wonderful BBQ cook, and a definite expert on equipment for surface preparation and coatings application. I think that "coatings genius" comment of his was a little bit over the top. The truth is more in line with the fact that after 38 1/2 years in the industry, one learns what works and what doesn't. The secret of success is not repeating things that didn't work in the past. No "genius" involved there, just good memory and good record keeping.

Comment from Michael Quaranta, (3/15/2016, 2:59 PM)

PETER, Your right on with the statement "what works and doesn't work." Twelve years ago I coated six (6) traffic plates because the State of California wanted a non-slip surface for pedestrians and vehicle street traffic. One of the plates was installed in the entrance driveway of the steel plate rental company. With their trucks going in-and-out, it was still there eight (8) years later with almost all of the coating still there. I coated a small steel plate on that day and have kept it in my trunk with my other samples. I would hand you the steel plate with a 9-inch spike and ask you to scratch off the coating. If I had your email address I'd send you photos of the steel plate with all of the abrasive action scratches that did not penetrate the coating. I'd include a photo of the spike. Now for the beginning quote: "what works and doesn't work" is to add that the coating is a water-based, water clean-up two component epoxy with a four (4) hour "Pot Life" !!! No primer required. Perhaps one might compare the ocean "VIV" condition to daily truck trafic? I know now that I could have prepared my sample steel plate a little better.

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