1 Permeability values to be used for certain cargo spaces - (regulation 25-7)
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.651 – International Convention for the Safety of Life at Sea, 1974, as amended – (Adopted on 8 June 1994) - Annex - Interpretations of Regulation of Part B-1 of SOLAS Chapter II-1 - 1 Permeability values to be used for certain cargo spaces - (regulation 25-7)

1 Permeability values to be used for certain cargo spaces - (regulation 25-7)

 The permeability value for cargo spaces is given in regulation 25-7.

 Where a ship is fitted with significant quantities of cargo insulation, the permeabilities of the relevant cargo spaces and/or the void spaces surrounding such cargo spaces may be calculated, whilst giving consideration to the volume of insulation material in those spaces, provided that the insulating material is shown to comply with the following conditions:

  • .1 it is impermeable to water under hydrostatic pressure at least corresponding to the pressure caused by the assumed flooding;

  • .2 it will not crush or break up due to hydrostatic pressure at least corresponding to the pressure caused by the assumed flooding;

  • .3 it will not deteriorate or change its properties over the long term in the environment anticipated in the space it is installed;

  • .4 it is highly resistant to the action of hydrocarbons; and

  • .5 it will be adequately secured so that it will remain in position if subjected to collision damage and consequent displacement, distortion of its supporting and retaining structure, repeated rapid ingress and outflow of seawater and the buoyant forces caused by immersion following flooding.

Parent topic: Annex - Interpretations of Regulation of Part B-1 of SOLAS Chapter II-1
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