5 Fuel tanks
5.1 Materials, design and marking
Materials, design and marking shall be in accordance with Annex C.
5.2 Testing
5.2.1 Each tank shall be pressure-tested in accordance with Annex A.
5.2.2 Non metallic petrol tanks shall meet the fire test in accordance with Annex B.
5.3 Installation
5.3.1 Fuel tanks shall be permanently installed in such a manner that they do not support decks, bulkheads or other craft structure, unless they are designed for the purpose.
5.3.2 Petrol tanks shall not be integral with the hull.
5.3.3 Each metallic tank shall be installed to allow drainage from each tank surface when the craft is in its static flotation position.
Metallic fuel tanks, other than those provided in 5.5.8, installed above horizontal surfaces, shall be separated from the surfaces by at least 5 mm and the surfaces shall not trap water.
5.3.4 Fuel tanks shall not be mounted on inboard engines.
NOTE This requirements does not apply to metallic diesel tanks with a capacity less than 15 which may be mounted on inboard engines.
5.3.5 Fuel tanks shall be installed in a manner that allows inspection and maintenance of fittings, hoses connections, etc. The markings of C.3 shall be visible during inspection.
5.3.6 Supports, chocks or hangers shall be separated from the surface of metal tanks by a non-metallic, non-hygroscopic, non-abrasive material or welded to the tank.
5.3.7 Metal tanks located inside the craft shall be installed with the tank bottom no less than 25 mm above the top of the bilge pump inlet or above the bilge pump automatic float switch.
5.3.8 Foam shall not be used to secure tanks in place.
If foam is in contact with the tank, due care should be taken to avoid corrosion.
6 Fuel pipes, hoses, connections and accessories
6.1 Fuel fill lines
6.1.1 The minimum inside diameter of the fill pipe system shall be 31,5 mm and minimum inside diameter of fuel fill hoses shall be 38 mm.
6.1.2 Fuel fill hoses located in the engine compartment shall be fire resistant type A1 or A2 according to ISO 7840.
Other fuel fill hoses shall be either type A1 or A2 in ISO 7840, or type B1 or B2 in ISO 8469.
6.1.3 Each petrol tank shall have individual fuel fill system.
6.1.4 Fuel fill lines shall be self-draining to the tank when the craft is in its static floating position.
6.1.5 Fuel fill lines shall run as directly as practicable, preferably in a straight line from the deck plate or equivalent fill point to the spud of the tank.
