Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 2 Ship Types - Chapter 1 Bulk Carriers - Section 5 Cargo Hatch Covers - 8 Drainage
8 Drainage
8.1 Arrangement
8.1.1 Drainage is to be arranged inside the line of gaskets by means of a gutter bar or vertical extension of the hatch side and end coaming.
8.1.2 Drain openings are to be arranged at the ends of drain channels and are to be provided with efficient means for preventing ingress of water from outside, such as non-return valves or equivalent.
8.1.3 Cross-joints of multi-panel hatch covers are to be arranged with drainage of water from the space above the gasket and a drainage channel below the gasket.
8.1.4 If a continuous outer steel contact is arranged between the cover and the ship’s structure, drainage from the space between the steel contact and the gasket is also to be provided.
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