10.1.1 Where
auxiliary power is not provided, hand pumps are to be fitted, in number
and position, as may be required for the efficient drainage of the
ship.
10.1.2 In
general, one hand pump is to be provided for each compartment. Alternatively,
two hand pumps connected to a bilge main, having at least one branch
to each compartment, are to be provided.
10.1.3 For
unmanned pontoons and as an alternative to Pt 5, Ch 13, 10.1 Pumps 10.1.1 and Pt 5, Ch 13, 10.1 Pumps 10.1.2, two portable pumps are
to be provided together with suitable suction and discharge hoses
as applicable. This equipment is to be either stored on board the
pontoon or carried on board an attending tug.
10.1.4 The
pumps are to be capable of being worked from the upper deck or from
positions above the load waterline which are at all times readily
accessible. The suction lift is not to exceed 7,3 m and is to be well
within the capacity of the pump.
10.1.5 The
sizes of the hand pumps are to be not less than those given in Table 13.10.1 Sizes of hand pumps. Where the ship
is closely sub-divided into small watertight compartments, 50 mm bore
suctions will be accepted.
Table 13.10.1 Sizes of hand pumps
| Tonnage under
upper deck
|
Diameter of barrel
of bucket pump
mm
|
Bore of suction pipe of
bucket pumps and semi-rotary pumps
mm
|
| Not exceeding 500 tons
|
100
|
50
|
| Above 500 tons but not exceeding 1000
tons
|
115
|
57
|
| Above 1000 tons but not
exceeding 2000 tons
|
125
|
65
|
| Above 2000 tons
|
140
|
70
|