Section 3 Fittings of Deep Tanks

301. Limbers and air holes

Limbers and air holes are to be cut suitably in the structural members to ensure that air or water does not remain stagnated in any part of the tank.

302. Cofferdam

1. The following dedicated tanks are to be separated from adjacent tanks by cofferdams. However, these coffer-dams may be omitted provided that the common boundaries of lubricating oil and fuel oil tank have full penetration welds.

(1) Fuel oil

(2) Lubricating oil

(3) Vegetable oil

(4) Fresh water

2. The cofferdams in Par 1 are to be provided with the air pipes to comply with the requirements in

Pt 5, Ch 6, 201. of the Rules and with the manholes of adequate size which are well accessible.

3. Crew spaces and passenger spaces are not to be directly adjacent to the tanks for carriage of fuel oil. Such compartments are to be separated from the fuel oil tanks by cofferdams which are well ventilated and is not less than 600 mm in width for easy access. Where the top of fuel oil tanks

has no opening and is coated with incombustible coverings of 38 mm and over in thickness, the cofferdam between such compartments and the top of fuel oil tanks may be omitted.