5.8 Materials for Valves and Associated Piping

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 - 5.8 Materials for Valves and Associated Piping

5.8 Materials for Valves and Associated Piping

5.8.1 A valve or similar fitting attached to the side of the vessel below the waterline, within an engine space or other high fire risk area, should be normally of steel, bronze, copper, or other non-brittle fire resistant material or equivalent.

5.8.2 When plastic piping is used it should be of good quality and of a type suitable for the intended purpose.

5.8.3 Flexible or non-metallic piping, which presents a risk of flooding, fitted in an engine space or fire risk area should be efficiently insulated against fire, or be of fire resistant material, e.g. ISO Standard 7840 or exhaust quality rubber hosing, or a means should be provided to stop the ingress of water in the event of the pipe being damaged, operable from outside the space. (See Section 5.8.1 for valve requirements.)

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