Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - 5 Weathertight Integrity - 5.9 Materials for Valves and Associated Piping

5.9 Materials for Valves and Associated Piping

  5.9.1 Valves which are fitted below the waterline should be of steel, bronze or other material having a similar resistance to impact, fire and corrosion. Non metallic valves will not normally be considered equivalent.

  5.9.2 The associated piping should, in areas as indicated above, be of steel, bronze, copper or other equivalent material. Non metallic piping will not normally be considered equivalent.

  5.9.3 Where the use of plastic piping is proposed, it will be considered and full details of the type of piping, its intended location, and use, should be submitted for approval; with regard to watertight integrity, any plastic piping should be above the waterline. Due regard should be paid to the IMO Fire Test Procedures Code, and 14A.2.3.4 or 14B.2.11.6.

  5.9.4 The use of flexible piping in any location should be kept to a minimum compatible with the essential reason for its use. Flexible piping and the means of joining it to its associated hard piping system should be approved as fit for the purpose.

Parent topic: 5 Weathertight Integrity
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