In the ten year period 1965 to 1975, 75 steel or concrete platforms were erected in the North Sea in depths ranging from 30 to 160 m. The value of each platform is about 50 pound stirling m today. The total cost of underwater inspection is estimated to average 1/2% per annum of the investment, so that in 1976 terms the value of the market is about 20 pound stirling m, rising over the next ten years to perhaps 35 pound stirling m per annum. Maintenance and repair work, such as removal of marine growth which can be up to 8-in. thick, would add a further 10-15 pound stirling m per annum to these figures. A designer must understand all the requirements and problems of underwater maintenance at the inception of the platform's design including the problems of navigation around the steel jackets or concrete structures. A system of identification of major areas and nodes should be incorporated to facilitate inspection. A guidance booklet on such aspects is being prepared with the Department of Energy through UEC and CIRIA. Order from BSRA as No. 50,040.

  • Supplemental Notes:
    • Society for Underwater Technology, Seminar held in London, February 17, 1977, Summary of Paper V.
  • Corporate Authors:

    Society for Underwater Technology, Limited

    Institution of Mechanical Engineers, 1 Birdcage Walk
    London SW1H 9JJ,   England 
  • Authors:
    • Goodfellow, R
    • Thornton, P G
  • Publication Date: 1977

Media Info

  • Pagination: 3 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00194237
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jun 13 1979 12:00AM