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[接上页] (i) in the case of ships other than post 1992 ships: (i) safe and efficient means of ascertaining the amount of oil fuel contained in any oil fuel tank shall be provided. Sounding pipes shall not terminate in any space where the risk of ignition of spillage therefrom could arise. In particular, sounding pipes shall not terminate in passenger spaces or crew spaces. Other means of ascertaining the amount of oil fuel may be permitted provided that the failure of such means or overfilling of the tanks will not permit release of oil fuel; (ii) in the case of post 1992 ships: safe and efficient means of ascertaining the amount of oil fuel contained in any oil fuel tank shall be provided. Sounding pipes shall not terminate in any space where the risk of ignition of spillage therefrom could arise. In particular, sounding pipes shall not terminate in passenger spaces or crew spaces. As a general rule, sounding pipes shall not terminate in machinery spaces. However, where the Certifying Authority considers that these latter requirements are impracticable, it may permit termination of sounding pipes in machinery spaces on condition that all the following requirements are met- (A) in addition, an oil-level gauge is provided such that its failure or over-filling of the tank shall not permit release of fuel oil into the space. The use of cylindrical gauge glasses is prohibited. The Certifying Authority may permit the use of oil-level gauges with flat glasses and self-closing valves between the gauges and fuel tanks; (B) the sounding pipes terminate in locations remote from ignition hazards unless precautions are taken such as the fitting of effective screens to prevent the oil fuel in the case of spillage through the terminations of the sounding pipes from coming into contact with a source of ignition; and (C) the termination of sounding pipes are fitted with self-closing blanking devices and with a small diameter self-closing control cock located below the blanking device for the purpose of ascertaining before the blanking device is opened that oil fuel is not present. Provisions shall be made so as to ensure that any spillage of oil through the control cock involves no ignition hazard. Other means of ascertaining the amount of fuel oil may be permitted in place of sounding pipes provided it complies with sub-subparagraph (A). The oil-level gauges so provided shall be maintained in the proper condition to ensure their continued accurate functioning in service; (L.N. 415 of 1995)(j) provision shall be made which will prevent overpressure in any oil fuel tank, oil fuel filling pipe or any part of the oil fuel system. Air and overflow pipes and relief valves shall discharge to a position where there will be no risk of fire or explosion from the emergence of oil or oil vapour; (k) every oil fuel pipe shall be made of steel or other suitable material except that flexible pipes may be permitted in positions where the Certifying Authority is satisfied that they are necessary; such flexible pipes and their attachments shall be constructed to the satisfaction of the Certifyi |