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Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.362(92) – Revised Recommendation on a Standard Method for Evaluating Cross-Flooding Arrangements – (Adopted on 14 June 2013) - Annex – Revised Recommendation on a Standard Method for Evaluating Cross-Flooding Arrangements - 3 Air pipe venting criteria -

  3.2 In arrangements where the total air pipe sectional area is less than 10 per cent of the cross-flooding sectional area, the restrictive effect of air back pressure should be considered in the cross-flooding calculations. The following method may be used for this purpose:

  • The k coefficient used in the calculation of cross-flooding time should take into account the drop of head in the air pipe. This can be done using an equivalent coefficient ke, which is calculated according to the following formula:

 where:

  • kw = k coefficient for the cross-flooding arrangement (water)

  • ka = k coefficient for the air pipe

  • ρa= air density

  • ρw = water density

  • Sw = cross-section area of the cross-flooding device (water)

  • Sa = cross-section of air pipe

Parent topic: 3 Air pipe venting criteria
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