Wall Wash Assistance
Some next cargoes (cargoes to be loaded) with sophisticated quality requirements could require additional cleaning to pass certain wall wash tests
Removal of cargo traces (indicated by a failure of the UV Spectrum, acid wash or NVM tests):
Wash the tank again with a fresh cleaning solution, because dirty and/or saturated cleaning solutions could leave cargo residues behind.
Removal of residual hydrocarbons (indicated by a failure of the water miscibility/Tyndall test):
Wash or spray the tank with a suitable Hydrocarbon Remover, or a non-flammable and non-toxic solvent (e.g. glycol ether). Coating compatibility should be taken into consideration.
Removal of chlorides (indicated by a failure of the chloride test):
Wash or spray the tank with DI water.
Improvement of colour (indicated by a failure of the colour test):
Wash the tank with a bleach solution. Coating compatibility should be taken into consideration.
Improvement of PTT test (indicated by a failure of the permanganate time test):
Wash the tank with a bleach solution. Coating compatibility should be taken into consideration.
Removal of odour:
Wash or spray the tank with an odour remover/deodorizer