With a view to improving the reliability of marine steam propulsion systems, an investigation of failures occurring in the Nippon Kaiji Kyokai fleet has been carried out. The damage data were collected during NK regular inspections over a period of three years (1974-1976) from 52 steamships that entered service between 1956 and 1975. The data have been analysed and attention paid to the variation in rate of damage occurrence in relation to time in service. The type of trouble encountered with steam-turbine propulsion systems is shown clearly by the results, and is tied to the accumulation of stresses with time (e.g. corrosion, wear, etc.). The frequency of damage to boiler systems increases rapidly after six or seven years of service, due mainly to waterside corrosion of the superheater and other boiler tubes. Turbine damage is mainly to components and reduction gears when entering service at first, but later, after three or four years trouble mostly arises with the condensation system. The most noticeable problem with the propulsion system is wearing out of the sterntube oil-seal equipment and cracking of the shaft cone big end, incidents which occur mostly on first coming in to service. Order from BSRA as No. 54,891.

  • Corporate Authors:

    Kobe University

    Rokkodai-cho, Nadu-ku
    Kobe,   Japan 
  • Authors:
    • Nishikawa, E
    • Hashimoto, J
  • Publication Date: 1980-7

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00331568
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Part 2
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM