Cargo Handling Systems Flashcards
What are the advantages of double hulled tankers?
offer a degree of protection against collision and stranding damage by protectively locating the cargo tanks
what degree of longitudinal sub-division of cargo tanks is in the earlier double hull tankers?
none
what degree of longitudinal sub-division of cargo tanks is in the newer and larger double hull tankers?
either 1 or 2 sub-divisions
where are most of the longitudinal strength members located?
in the segregated ballast tanks
why are most of the longitudinal strength members located in the segregated ballast tanks?
gives flush cargo tanks - easier to drain + clean
how do you segregate different grades or types of chemical in cargo tankers?
- smaller tanks
- more tanks
- more complex pipeline system
how are tanks separated?
- some by cofferdams
- more sophisticated ships each cargo tank will be served by its own pump + pipeline
what are the three basic pipeline systems used on tankers?
- direct line
- ring main
- free flow
what is the function of the pipeline system?
to direct the oil to and from the terminal and within the cargo tanks
what controls the flow of oil?
valves located within the system
what is the Manifold?
- the interface between the ship and shore pipelines
- runs athwartships, usually amidships
what are ‘Chiksans’?
- the actual connection of the Manifold
- usually made of flexible rubber hoses or metal arms
why do modern systems use hydraulic clamps as a connection to the ships Manifold?
allows fast decoupling in the event of an emergency
what part of the Manifold allows for the vertical movement of the ship whilst loading at a terminal?
the Chiksans
how is seawater ballast drawn to the pumps through sea?
suction valves located in the pumproom