Drainage and ventilation pipe systems
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.648 – Guidelines for the Operation, Inspection and Maintenance of Ship Sewage Systems – (Adopted on 6 June 1994) - Annex - Guidelines for the Operation, Inspection and Maintenance of Ship Sewage Systems - Drainage and ventilation pipe systems

Drainage and ventilation pipe systems

  11 Check that drains and their air vents are clear of obstruction and are in sound water/gas tight condition throughout their length and are self-draining at all expected angles of heel or trim. Adequate air vents should be fitted to the piping network, paying special attention to the extremities of the system. These should ensure an adequate supply of air and obviate any tendency for plugs of water to form within the system, tending to syphon or create vacuums thus removing water seals, when moving through the pipes especially under the action of violent rolling or pitching.

Parent topic: Annex - Guidelines for the Operation, Inspection and Maintenance of Ship Sewage Systems
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