5.6 Air Pipes

Clasification Society 2024 - Version 9.40

Statutory Documents - MCA Publications - MGN 280 - Small Vessels in Commercial Use for Sport or Pleasure, Workboats and Pilot Boats - Alternative Construction Standards - 5 Weathertight Integrity - 5.6 Air Pipes

5.6 Air Pipes

5.6.1 When located on the weather deck, an air pipe should be kept as far inboard as possible and have a height above deck sufficient to prevent inadvertent downflooding when the vessel is heeled. (See Sections 11.3, 11.4, 11.6, and 11.8.)

5.6.2 An air pipe, of greater than 10mm inside diameter, serving a fuel or other tank should be provided with a permanently attached means of weathertight closure. Means of closure may be omitted if it can be shown that the open end of the air pipe is afforded adequate protection by other means, which will prevent the ingress of water.

5.6.3 An air pipe serving a fuel tank (also see Section 7.4.4) or other tank, where provided with a closing appliance, should be of a type which will prevent excessive pressure on the tank boundaries. Provision should be made for relieving a vacuum when tanks are being drawn from or emptied.

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