The temperature during the cleaning steps is one of the most important operating parameters. It must be remembered that the temperature in the cargo tank can be significantly influenced by the surrounding conditions. The following should be taken into consideration: Outside temperature, sea water temperature, ballast conditions and adjacent cargo temperature. A deviation from the desired operating temperature could be caused in the entire tank or just locally on bulkheads, tank bottoms or tank walls.
This could have a negative impact on the desired result, such as freezing due to lower than allowed temperature or polymerisation/drying due to higher than allowed temperature. Good operating practice is to avoid problems resulting from adjacent cargoes or from ballast water by respective stowage planning. The effects of the surrounding temperatures should be compensated and thoroughly controlled during the operation.