Tony Posted August 13, 2018 Report Share Posted August 13, 2018 Very interesting. Quote Link to comment Share on other sites More sharing options...
Sagitar Posted August 14, 2018 Report Share Posted August 14, 2018 What a lot of rust! Quote Link to comment Share on other sites More sharing options...
Tony Posted August 14, 2018 Author Report Share Posted August 14, 2018 Joy of the sea....Wonder what the life expectancy is for these rigs? Quote Link to comment Share on other sites More sharing options...
Rich Posted August 15, 2018 Report Share Posted August 15, 2018 Do rigs have any protection applied to them so it delays the rot? Quote Link to comment Share on other sites More sharing options...
CP09 Posted August 16, 2018 Report Share Posted August 16, 2018 I believe that there's a regular scheme of "painting", using water/rust resistant coatings. Applied by divers! There is only a limited life span - there's always a couple at Kirkcaldy for maintenance, and there's lots laid up in Nigg Bay - presumably waiting scrapping... Colin Quote Link to comment Share on other sites More sharing options...
Tony Posted August 16, 2018 Author Report Share Posted August 16, 2018 I would think most of the pipes are very high pressure, so that and the tin worm must be a delicate balancing act, in fact i'm surprised there's not more blowouts. Quote Link to comment Share on other sites More sharing options...
Tango Posted October 13, 2018 Report Share Posted October 13, 2018 Most subsea and sea level components including pipelines have sacrificial anodes welded to them. The anodes are made from a metal alloy with a more "active" voltage (more negative electrochemical potential) than the metal of the structure it is protecting (the cathode). The difference in potential between the two metals means the anode material corrodes in preference to the structure. The anodes sacrifice their material to the benefit of the steel. It may look rusty but the basic integrity is sound. Anodes are replaced before they lose critical mass. All the equipment being installed now has decommissioning costs built in as when its service life ends it has to be removed to return the the sea bed to its original state. 1 Quote Link to comment Share on other sites More sharing options...
Tony Posted October 13, 2018 Author Report Share Posted October 13, 2018 Stupid question but how future proof are the decommissioning costs. Quote Link to comment Share on other sites More sharing options...
Tango Posted October 21, 2018 Report Share Posted October 21, 2018 Yes I agree, stupid question. Basically the oil companies have to pay whatever it costs. Quote Link to comment Share on other sites More sharing options...
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