05 Ballast system in ER

Course No. 2004

Slide 2

Purpose of the rules;

Ballast System - E/R

To achieve/maintain proper trim and stability of the vessel

Design to be based upon the class rules

The international conventions do not contain detailed design requirements to the ballast piping system.

Slide 3

Class requirements :

Ballast System - E/R

Ballast tanks may be filled by pumping or by opening inlet valves to sea.

All ballast tanks are to be connected to at least two drainage pumps.

The dimension of pipes are at least to be :d1 = 2.15 * l*(B+D) + 25(mm)

d1 = internal diameter (mm)l = length of compartment (m)B = Breadth of ship (m)D = depth of ship to bulkhead deck (m)

Slide 4

Ballast System - E/R

h Remotely controlled ballast pumps are to be provided with operating indications at the remote panel.

For remotely controlled valves failure in power supply is not to cause opening of closed valves.

Remotely controlled valves are to be provide with indications for open and closed position at the control station.

Slide 5

BALLAST SYSTEM

H

H

H

H

H

H

H

H

H

NO. 6 W.B.T. (P)

NO. 6 W.B.T. (S)H H

STRIPPING

EDUCTOR

SEA CHEST

W.B.T

P/ROOM

H.F.O

TKD.W.L

NO. 5 W.B.T. (P)

NO. 5 W.B.T. (S)

FOR EMCY

BALLASTING TO

CARGO SYSTEMFROM INERT

GAS SYSTEM

NO.1 BALLAST PUMP

NO.2 BALLAST PUMP

HYD. TEST

CONNECT

H H H

H

NO. 1 W.B.T. (P)

NO. 1 W.B.T. (S)

F.P.T (C)

PUMP ROOM WATER BALLAST TANK

H

CONNECTION BLOCK

FOR HAND PUMP

(FOR EMCY USE)

POSITION

CONTROL

TYPE VALVE

Slide 6

EDUCTOR

A eductor is a form of pump which has no moving parts.

Eductors can be arranged as single or multi-stage units and have particular applications.

Slide 7

EDUCTOR

Inlet casing with nozzle

Slide 8

Performance curve

Inlet casing with nozzle

Driving water

Suction capacity

Slide 9

Reference;

Ballast System - E/R

- DNV Rules for Ships Pt.4 Ch.6 Sec.2/3/4/6/7