Annex A
(normative)
Pressure testing
.1A.1 When testing a separate component of a fuel system, the test pressure shall be 20 kPa or 1,5 times the highest hydrostatic pressure to which the component may be subjected in service, whichever is greater.
A.2 When testing a separate component containing non-metallic parts in contact with fuel or fuel vapour, the component shall be filled with test liquid C in accordance with ISO 1817 and stored for at least 28 days at an ambient temperature of not less than + 10℃.
A.3 Pressure testing shall be performed immediatly after emptying the component. Individual or assembled components, and individual tanks in complete fuel systems shall be pressure tested and any leakage detected either by submerging in water or by use of leak detecting solution.
WARNING - DO NOT USE SOLUTIONS CONTAINING AMMONIA.
A.4 When testing a complete fuel system as installed in the craft, the test pressure shall be 20 kPa. For complete systems as a whole, the pressure drop method shall be used. The time during which the system is exposed to the pressure shall be at least 1,5 s per litre tank capacity or 5 min, whichever is greater, up to a maximum of 30 min.
When pressure-testing complete systems, fuel-fill deck plates and vent-line through-hull fittings may be replaced by plugs. The fuel connection at the fuel feed pump of the engine shall be disconnected and sealed. Anti-siphon valves
and other fuel valves shall be open.
A.5 A component or fuel system shall show no leakage under testing.
