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Double-Hull Tanker Legislation An Assessment of the Oil Pollution Act of 1990 (1998) / Chapter Skim
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Appendix M
Pages 250-262

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From page 250...
... D Modifications to generic tanker specifications necessary for the company's special cargo trade.
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From page 251...
... A problem for tankers built without a centerline bulkhead in cargo tanks and DB (double bottom) tanks.
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From page 252...
... I Difficult to ventilate ballast tanks.
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From page 253...
... Inerting of ballast tanks possible using flexible hose connections to inert gas plant.
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From page 254...
... B Each laden voyage, ballast tanks inspected.
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From page 255...
... Coating in ballast tanks light colored. One of the 299,000 DWT DH tankers has had coating damage due to poor work at the yard.
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From page 256...
... A 27,000 DWT, built 1986 2 x 150 microns of coal tar epoxy; 299,000 DWT, built 93/95 1 x 150 microns surface tolerant epoxy, 1 x 150 microns modified tar epoxy (light color)
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From page 257...
... L Surface preparation to SA 2.5, coal tar epoxy, 2 x 125 microns, plus three stripe coats.
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From page 258...
... Company strongly supports efforts of American Bureau of Shipping (ABS) to modernize ship structure analysis.
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From page 259...
... C Better accessibility to ballast tanks and light color paint in ballast spaces.
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From page 260...
... N Double hulls eliminate piping leaks as major source of pollution (no cargo pipes in ballast tanks)
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From page 261...
... B Ballast tanks have large surfaces coated with sophisticated and expensive coating: need continuous monitoring and maintenance.
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From page 262...
... Increased vigilance required to ensure integrity of double-hull spaces. Increased port and insurance costs due to greater GRT.
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Key Terms

  • ballast tanks
  • tar epoxy
  • coal tar
  • cargo tanks
  • tank washing

  • surface preparation
  • double bottom
  • ballast tank
  • cargo operations
  • coating inspection

  • void spaces
  • tensile steel
  • inert gas
  • operational procedures
  • free surface

  • flexible hose
  • double hulls
  • cargo handling
  • coating thickness
  • tanks inspected

  • oil leakage
  • larger vessels
  • light color
  • vessels built
  • life expectancy

  • center bulkheads
  • hydrocarbon detection
  • tank coating
  • significant corrosion
  • double hull


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