This is one of the most important and dangerous processes in the transportation chain.
The availability of a suitable cleaning station must be taken in to account before a cargo is accepted for transportation. It has to be appreciated that not all cargoes will be able to be processed by an individual cleaning station.
The cleaning station must be equipped with all the required health and safety equipment and carry out rigorous safety procedures including atmosphere monitoring before allowing personnel to enter a tank.
Tanks should be dried immediately after cleaning. It is highly probable that the final rinse water will be chlorinated which will corrode stainless steel. Failure to clean correctly and immediately after discharge can result in the next cargo being contaminated with the former and or corrosion affecting the pressure vessel.
It is most important that the cleaning is carried out in a recognised cleaning station which has the capability of removing and properly disposing of any cargo residue in a save environmentally friendly way.