HEATING CARGO - PART 4

Code No: 504

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This is part of a series of five videos that uses computer graphic techniques with animated sequences to produce concise, visually effective and informative training material. A full voice commentary describes and reinforces the highly detailed visual images.

The videos take as an example a 170,000 dwt segregated ballast tanker (no double bottom) with 7 cargo tanks, 2 slop tanks and 3 cargo pumps. The capacity of the cargo pumps is 4000 m3/hour.

Part 4 - The fully laden vessel is now entering colder climates where it becomes necessary to heat the cargo to maintain its temperature. Tanks are fitted with heating coils. The operation of the heating system is described in detail. Starting procedures is shown. This can take several hours as each coil needs to be inspected to ensure there are no leaks. Taking cargo temperature and completing the heating log is shown. Adjustments need to be made to the number of active heating coils and steam pressure to maintain cargo temperature. The procedure for stopping heating is shown. Routine maintenance of the heating circuit and precautions for sub-zero temperatures are also given.