Tank cleaning

• The availability, in the location of tank discharge, of a qualified and licenced cleaning station should be considered before a cargo is accepted for transport. Not all cargoes are able to be cleaned by an individual cleaning station.
• Tanks that are not cleaned soon after discharge, and depending upon the cargo and the ambient temperatures, are at risk of corrosion or more difficult to remove cargo residues.

Safety

• A cleaning station must be equipped with all required health and safety equipment and personnel trained and qualified in relevant safety procedures including tank entry and working at height.

Environment

• The cleaning facility must be licenced by a governmental authority to safely dispose of tank residues, including dangerous goods and wash water.

Food-grade tanks carrying animal, marine and vegetable oils and fats.

• Tank containers may be suitable to transport food grade cargo, subject to the specification of the tank, previous cargoes and condition of cleanliness.
• Individual shippers and industries might require specific food grade tank requirements. It is essential to consult directly with the shipper.
• Tank shell should be constructed of non-corrosive material stainless steel or fibre reinforced plastic FRP.
• Bottom discharge required – top and bottom discharge acceptable but top discharge only not permitted.
• Heated by external coils only – internal coils not permitted.
• Appropriate cleaning food grade cleaning procedures to be undertaken by a qualified facility.
• Valves and fittings to be cleaned and examined, replacing seals and gaskets as appropriate.
• FOSFA publish guidance which includes acceptable and banned previous cargoes and cleaning procedures. https://fosfatest.pmwdev.co.uk/technical/carriage-of-oil-and-fats/