Iveco Marine Diesel Engines, Руководство по установке

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MARCH 2004 FUEL SUPPLY
6.71
MARINE ENGINES INSTALLATION
NOTE
In particular, the fuel reservoir, the pipes and the relevant pipe unions shall observe the specifications and
rules of the country where the boat is to be used, especially in relation to fire safety rules.
6.4 ENGINE-RESERVOIR PIPES
The engine and the reservoir are mutually connected by fuel supply and return pipes.
The two pipes can have different diameter, i.e. the supply pipe diameter is higher because of the high-
er fuel capacity, at least double. However, they must have the same diameter for those engines where
the injector draining is combined with the injection pump return.
The pipe size depends on the installation structure and on the pipe unions set on the engines; to iden-
tify their diameters and length, refer to the relevant installation diagrams provided with each engine.
The pipe unions can be of eyelet type with rubber holder or with threaded end.
Prescriptions:
■
For fuel circuits it is possible to use pipes “without welding”, preferably made of ferrous alloy or
stainless steel. Synthetic resin, nylon and similar pipes are not accepted by the Classification Bodies
as they are not suitable in the event of fire.
■
The pipes must be suitable in temperature and pressure conditions typical of the engine application.
■
The pipe diameter shall not be lower than the diameter of the pipe unions on the engine and grow
as the engine - reservoir distance increases.
■
The engine-pipe union connections shall be designed for all types of engine suspensions, rigid or
flexible. They shall be realised by inserting a flexible element between the engine and the pipe. If
present, the rubber holder eyelet shall consist of a rubber sleeve reinforced with textile inserts, suit-
able for diesel fuel and resisting the fire according to the rules in force in each single country and
with the right length, to be tightened on pipes and unions by means of screw clamps. If there is a
threaded pipe union, a low pressure hose shall be inserted in between, suitable for diesel oil and
resisting fire, fitted with threaded pipe unions at the two ends.
■
The pipes fitted with rubber sleeves shall be bordered to ensure perfect tightness of the screw
clamps (see figure 6).
■
Take great care when joining the pipes and regularly check their tightness.
■
The pipe anchoring on the boat structure shall be carried out safely and by means of brackets suit-
ably spaced to prevent the vibration and bending resonance due to the pipe weight; it is suggested
to use brackets with flexible coating.
■
The pipe routing shall foresee the minimum number of curves which, if present, shall be wide
enough to prevent the formation of intermediate pockets. Foresee also the suitable guards in the
areas exposed to bumps or heat.
■
Always make sure that there is no possibility of air inlet/suction.
CAUTION
Clean accurately the pipes and the reservoirs before using them through washing and blowing to
remove the impurities and remains inside them. When you finish using these pipes and reservoirs,
put them away protected by the suitable protecting caps.