3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.1
accessible
capable of being reached for inspection, removal or maintenance without removal of permanent craft structure
NOTE Hatches are not regarded as permanent craft structure in this sense, even if tools such as wrenches or screwdrivers are needed to open them. Hatches for inspection or maintenance of fuel tanks may be covered by uncut carpet, provided that all tank fittings can be inspected and maintained through other openings.
3.2
readily accessible
capable of being reached for operation, inspection or maintenance without removal of any craft structure or use of any tools or removal of any item of portable equipment stowed in places intended for storage of portable equipment such as lockers, drawers or shelves
3.3
permanently installed
securely fastened so that tools need to be used for removal
3.4
anti-siphon valve
demand valve which can be opened only by fuel pump suction to withdraw fuel from the tank and which will remain closed when the fuel pump is not operating, preventing siphon action created by a break or leakage at any point in the fuel distribution system
3.5
static floating position
attitude in which a craft floats in calm water, with each fuel tank filled to its rated capacity, but with no person or item of portable equipment on board, with other tanks such as water and holding tanks shall be empty and permanently installed equipment supplied by the craftbuilder in its proper place
3.6
petrol
hydrocarbon fuel or blends thereof which is liquid at atmospheric pressure and is used in spark ignition engines
3.7
diesel
hydrocarbon fuel or blends thereof which is liquid at atmospheric pressure and is used in compression ignition engines
4 General requirements
4.1 The fuel system shall be permanently installed. All component parts shall be independently supported except small connectors and fittings and short sections of flexible hoses.
4.2 Individual components of the system and the system as a whole shall be designed to withstand the combined conditions of pressure, vibration, shocks, corrosion and movement encountered under normal operating conditions and storage.
4.3 Each component of the system and the system as a whole shall be capable of operation within an ambient temperature range of - 10° to + 80° without failure or leakage and be capable of being stored without operation within an ambient temperature range of - 30° to + 80° without failure or leakage.
