During the sweeping operation, care is take to ensure that: 1.any residues that may be trapped in places such as accessible pipe guards, access ladder trunkings, behind frames and frame kness, are removed 2. hatch cover undersides, if not boxed in, are swept to remove any residues that have accumulated under the covers 3 hatch coamings, hatch trackways, hatch access ladders and internal laddder spaces are cleaned 4 during this sweeping process, the hold bilge wells should be apeneed and cleaned to remove any residues that may have fallen into them.
once sweeping and removal of the residues has been completed, the next task with most bulk cargoes is to whash down the holds and hatch covers with seawater. this seawater may be delivered from houses at the pressure supplied by the deck fire main, or from anhanced delivery systems such as the stromme Combi-Jet ot Maxi-Gun When washing down, the crew should take care to ensure that the upper reaches of the holds are washed thoroughly to dislodge any residues that may be trapped in the upper structure, behid pipe guards, on cross deck structures, etc. This is particularly important in parts of the hold that are physically inaccessible. During the wash-down, loose paint or rust scale will be dislodged.
The chemicals are usually applied using special equipment including : chemical tank mini-jet with air pressure of about 7 bar lance with foam nozzles and extensions personal protective equipment (ppe) after leaving the applied chemical on the bulkhead for a prescribed time, the chemicals are washed off using a full seawater wash. The operation should always be finished with a freshwater wash. always check the manufacturer's guidance on compatibilitywith paint systems. Always check with the charterer and/or shippers regarding compatibility with the next cargo. service does not include chemicals
