9 Pumping, piping and discharge systems in machinery spaces
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Marine Environment Protection Committee - MEPC.1/Circular.642 – 2008 Revised Guidelines for Systems for Handling Oily Wastes in Machinery Spaces of Ships Incorporating Guidance Notes for an Integrated Bilge Water Treatment System (IBTS)... - Annex - 2008 Revised Guidelines for Systems for Handling Oily Wastes in Machinery Spaces of Ships Incorporating Guidance Notes for an Integrated Bilge Water Treatment System (IBTS) - 9 Pumping, piping and discharge systems in machinery spaces

9 Pumping, piping and discharge systems in machinery spaces

  9.1 On board ships, the propulsion systems of which are operated by heavy fuel oil, the following guidelines are provided for the piping system comprising the plant components for the treatment and storage of oily bilge water, oil residue (sludge), drain and leakage oil and exhausted oil.

  9.2 The effluent from the 15 ppm bilge separators should be capable of being recycled to the oily bilge or oily bilge water holding tank.

  9.3 If an integral pump is fitted, the discharge must not bypass the 15 ppm bilge separator.

  9.4 The discharge piping system of the 15 ppm bilge water separator should be completely separate from the bilge pumping and ballast water system except the recycling line referred to in paragraph 9.2.

  9.5 Discharge piping systems fitted to secure the safety of the ship in emergency situations, such as fire or flooding, should efficiently and promptly tackle such emergencies and therefore should be available at all times in order to comply with the provisions of SOLASregulation II-1/21. Accordingly, the bilge overboard discharges should not be blanked off and remain operational at all times.

  9.6 The ship's discharge pipeline for oily residue (sludge) to the standard discharge connection should not be connected to any system other than supplying those means of disposal to be listed in the IOPP supplement.

  9.7 The separated dirty water and exhausted control water of fuel oil purifiers should be discharged into a particular tank for this purpose in order to minimize the influx to the oil residue (sludge) drain tank for separated sludge. This particular tank should be located above the double bottom for the purpose of facilitating its drain without the need of a drain pump. If dirty water and exhausted control water from purifiers is not discharged to a particular tank, and in lieu of this to a oil residue (sludge) drain tank for separated sludge, the tank should be located above the double bottom for the purpose of the aforementioned draining facilities.

  9.8 Piping to and from sludge tanks shall have no direct connection overboard, other than the standard discharge connection required by regulation 13.

Parent topic: Annex - 2008 Revised Guidelines for Systems for Handling Oily Wastes in Machinery Spaces of Ships Incorporating Guidance Notes for an Integrated Bilge Water Treatment System (IBTS)
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