The Supervisor of Salvage requested a study of methods for pumping cargo oil from stranded tankers and an evaluation of a submersible 25-hp salvage pump modified to pump oil and other viscous liquids. An investigation was made of the advantages and disadvantages of centrifugal and positive displacement pumps; strengths and head losses through oil transfer hoses of different sizes; power requirements, electric, hydraulic and pneumatic drives for salvage pumps; and heat required to lower cargo-oil viscosities for salvage. A 25-hp centrifugal salvage pump with modified, interchangeable impellers was tested in oils of various viscosities to determine its capability for pumping various types of oil in cargo salvage operations. It was found that for the required salvage operations the most practical salvage pump would be an electric, submersible, 18-hp pump capable of operating at 24 hp for limited periods, the modified submersible 25-hp salvage pump is satisfactory for salvaging oil cargoes if the steady-state temperature of the motor windings is limited to 140C, a 6-inch-diameter hose system should be used, and the standard 30/40-kw generator should not be expected to supply power to more than one 25- hp salvage pump when viscous oil is pumped. ( Author )

  • Corporate Authors:

    Naval Civil Engineering Laboratory

    Port Hueneme, CA  United States 
  • Authors:
    • Oldson, N P
    • Scott, A L
  • Publication Date: 1970-4

Media Info

  • Pagination: 40 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00005614
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Files: TRIS
  • Created Date: Nov 25 1973 12:00AM