Hull Construction Regulations — 19
ositive means by which it can be closed from a readily accessible position above the ship’s bulkhead deck and with an indicator at the position from which the valve may be closed to show whether the valve is open or shut, or (ii) two automatic non-return valves, the upper of which is so situated above the ship’s deepest subdivision load water line as to be always accessible for examination under service conditions and is of a horizontal balanced type that is normally closed; (c) any valve fitted in compliance with the requirements of paragraph (b) that is a geared valve, or the lower of two non-geared valves, shall be secured to the ship’s shell plating; (d) all cocks and valves attached to inlets or discharges, or bulkhead fittings within B/5 distance from the shell plating, other than inlets or discharges connected with machinery, being cocks or valves fitted below the margin line or the failure of which may affect the subdivision of the ship, shall be made of steel, bronze, or other equally efficient material; (e) main and auxiliary inlets and discharges connected with machinery shall be fitted with readily accessible cocks or valves between the pipes and the ship’s shell plating or between the pipes and a fabricated box attached to the shell plating and such cocks or valves of more than 76 mm diameter attached to such inlets or discharges shall be made of steel, bronze, or other equally efficient material; if made of steel they shall be protected against corrosion; (f) discharge pipes led through the shell plating below the margin line shall not be fitted in a direct line between the outboard opening and the connection with the deck, water closet or other similar fitting, but shall be arranged with bends or elbows of substantial metal other than cast iron or lead; (g) all discharge pipes led through the shell plating below the margin line and the valves relating thereto shall be protected from damage; (h) all bolts connecting cocks, valves, discharge pipes and other similar equipment to the shell plating below the margin line shall have their heads outside the shell plating, and shall be either countersunk or cup-headed; (i) efficient means shall be provided for the drainage of all watertight decks below the margin line and any drainage pipes shall be so fitted with valves or otherwise arranged as to avoid the danger of water passing from a damaged to an undamaged compartment; (j) the inboard opening of every ash chute, rubbish chute and other similar chute shall be fitted with an efficient watertight cover, and, if such opening is below the margin line, it shall also be fitted with an automatic non-return valve in the chute in a readily accessible position above the ship’s deepest subdivision load water line; the valve shall be of the horizontal balanced type, normally closed and provided with local means for securing it in a closed position; when chutes are not being used, the cover and valve shall be kept closed and secured, and a permanent notice to this effect shall be posted in close proximity to the chute hopper; the requirements of this paragraph shall not apply to ash ejectors and expellers the inboard openings of which are in the ship’s stokehold and necessarily below the deepest subdivision load water line; such ejectors and expellers shall be fitted with means that will prevent water from entering the ship; and (k) any gangway port, cargo port or coaling port fitted below the margin line shall be of adequate strength and its lowest point shall not be below the ship’s deepest subdivision load water line; an appropriate notice shall be posted in the Chart Room stating that all such gangway ports, cargo ports or coaling ports shall be effectively closed and secured watertight before the ship leaves port and shall be kept closed during navigation. SOR/95-254, s. 32