ISO/DIS 13590 Small craft -- Personal watercraft(8)

Author: Add date: 07/24/2007 Publishing date: 07/24/2007 Hits: 9

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ferrous alloy.
5.2.2 Cellular plastic used to encase fuel tank
5.2.2.1 Cellular plastic used to encase fuel tanks shall not change volume by more than 5 % or dissolve after
being immersed in any of the following liquids for 24 h at 29 °C:
— reference fuel B of ASTM D 471 or equivalent fuel;
— No. 2 reference oil of ASTM D 471 or equivalent fuel;
— 5 % solution of trisodium phosphate in water.
5.2.2.2 Cellular plastic used to encase fuel tanks shall not absorb more than 60 g of water per 0,1 m2 of cut
surface.
5.2.2.3 Non-polyurethane cellular plastic used to encase metallic fuel tanks shall have a com-pressive strength
of at least 400 kPa at 10 % deflection, when determined in accordance with ASTM D 1621.
5.2.2.4 Polyurethane cellular plastic used to encase metallic fuel tanks shall have a density of at least
0,032 g/cm3.
5.2.3 Fuel level indication
A means shall be provided to check the fuel level or a reserve fuel supply shall be provided.
ISO/DIS 13590:2001
© ISO 2001 – All rights reserved 5
5.2.4 Tank pressure limitation
With the personal watercraft in its static floating position, a fuel tank when filled shall have an air expansion volume
or be equipped with a system that prevents pressure in the tank from exceeding 80 % fuel tank design pressure.
5.2.5 Fill and vent openings
Fill and vent openings shall be at or above the liquid level when the tank is filled to capacity in its static floating
position.
5.2.6 Fuel tank static pressure test
A representative fuel tank shall not leak if tested using the following procedures.
5.2.6.1 Fill the tank with air or inert gas to 20 kPa or 90 % of the design relief pressure, whichever is greater.
5.2.6.2 Examine each tank fitting and seam for leaks using a leak detection method other than the pressure
drop method.
5.2.7 Fuel tank shock test
A representative fuel tank shall not leak when tested using the following procedure.
5.2.7.1 Confirm that the tank does not leak when pressure tested according to 5.2.6.
5.2.7.2 If the tank is non-metallic, precondition the tank by filling it to capacity with petrol that has at least a
50 % aromatic content. Keep the fuel in the tank at 21 °C or higher for at least 30 days prior to testing.
5.2.7.3 Mount the empty tank on the platform of an impact test machine in a manner similar to the manner in
which the tank and hold-down arrangement is installed in the personal watercraft.
5.2.7.4 Fill the tank to capacity with water.
5.2.7.5 Apply 1 000 cycles of vertical accelerations of 25 g at a rate of 80 cycles or less per minute. Apply the
accelerations within 76 mm of the centre of the horizontal mounting surface of the tank. The duration of each
vertical acceleration pulse measured at the base of the shock envelope shall be between 6 ms and 14 ms.
5.2.7.6 Check the tank for leaks using the procedure specified in 5.2.6.
5.3 Fuel tank installations
5.3.1 Non-encased fuel tanks
5.3.1.1 Each fuel tank shall not support a deck, bulkhead or other structural component.
5.3.1.2 Fuel tanks shall not be integral with the hull or engine.

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