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/Circular.235 – Guidelines for Systems for Handling Oily Wastes In Machinery Spaces of Ships – (Adopted on 13 December 1990) - Appendix - Guidelines for Systems for Handling Oily Wastes In Machinery Spaces of Ships - 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, separated sludge, drain and leakage oil and exhausted oil.

  9.2 The effluent from the 15 ppm and 100 ppm equipment should be capable of being recycled to the bilge or bilge-water holding tank.

  9.3 If an integral pump is fitted, the discharge should not bypass the 15 ppm or 100 ppm equipment.

  9.4 The discharge piping system of the 15 ppm and 100 ppm equipment should be completely separate from the bilge pumping and ballast water system except the recycling line referred to in paragraph 9.2.

  9.5 The ship's discharge pipeline for oily wastes to the standard discharge connection should be separated from the bunker fuel oil.

  9.6 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 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 tank for separated sludge, the tank should be located above the double bottom for the purpose of the aforementioned draining facilities.

  9.7 Piping to and from sludge tanks shall have no direct connection overboard, other than the standard discharge connection required by regulation 19 footnote.

Parent topic: Appendix - Guidelines for Systems for Handling Oily Wastes In Machinery Spaces of Ships
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