105 
Regulation 17 
TANKS FOR OIL RESIDUES (SLUDGE) 
(1) Every ship of 400 tons gross tonnage and above shall be provided with a 
tank or tanks of adequate capacity, having regard to the type of machinery and 
length of voyage, to receive the oily residues (sludges) which cannot be dealt 
with otherwise in accordance with the requirements of this Annex, such as those 
resulting from the purification of fuel and lubricating oils and oil leakages in the 
machinery spaces. 
(2) In new ships, such tanks shall be designed and constructed so as to 
facilitate their cleaning and the discharge of residues to reception facilities. 
bixisting ships shall comply with this requirement as far as is reasonable and 
practicable. 
Regulation 18 
PUMPING, PIPING AND DISCHARGE ARRANGEMENTS OF OIL TANKERS 
(1) In every oil tanker, a discharge manifold for connexion to reception 
facilities tor the discharge of dirty ballast water or oil contaminated water shall 
be located on the open deck on both sides of the ship. 2 
(2) In every oil tanker, pipelines for the discharge to the sea of effluent which 
may be permitted under Regulation 9 of this Annex shall be led to the open deck 
or to the ship's side above the waterline in the deepest ballast condition. Differ- 
ent piping arrangements to permit operation in the manner permitted in sub- 
paragraphs (4) (a) and (b) of this Regulation may be accepted. 
3) In new oil tankers means shall be provided for stopping the discharge of 
effluent into the sea from a position on upper deck or above located so that the 
manifold in use referred to in paragraph (1) of this Regulation and the effluent 
from the pipelines referred to in paragraph (2) of this Regulation may be vis- 
ually observed. Means for stopping the discharge need not be provided at the 
observation position if a positive communication system such as telephone or 
radio system is provided between the observation position and the discharge con- 
trol position. 
(4) All discharges shall take place above the waterline except as follows: 
(a) Segregated ballast and clean ballast may be discharged below the water- 
line in ports or at offshore terminals. 
(0) Existing ships which. without modification, are not capable of discharging 
segregated ballast above the waterline may discharge segregated ballast below 
the waterline provided that an examination of the tank immediately before the 
discharge bas established that no contamination with oil has taken place. 
Regulation 19 
STANDARD DISCHARGE CONNECTION 
To enable pipes of reception facilities to be connected with the ship’s dis- 
charge pipe line for residues from machinery bilges, both lines shall be fitted 
with a standard discharge connection in accordance with the following table: 
STANDARD DIMENSIONS OF FLANGES FOR DISCHARGE CONNECTIONS 
Description : Dimension : 
Outside diameter_____._._________- 215 mm. 
Inner diameter____-_____________ According to pipe outside diameter. 
Bolt circle diameter______________ 183 mm. 
Slots in flange___________________ 6 holes 22 mm. in diameter equi-dis- 
tantly placed on a bolt circle of 
the above diameter, slotted to the 
flange periphery. The slot width 
to be 22 mm. 
Flange thickness_________________ 20 mm. 
Bolts and nuts: quantiy, diameter_ 6, each of 20 mm. in diameter and 
of suitable length. 
The flange is designed to accept pipes up to a maximum internal diameter of 
125 mm. and shall be of steel or other equivalent material having a flat face. 
45-670 O- 75 - 8 
