Safety procedures for filling and emptying fuel tanks
When filling fuel tanks from the top, it is necessary to check the closure of the main valve, then open the top hatch, open the aeration nozzle and start the pump, constantly checking the filling level of the tank and the presence of faults and leaks. The total weight of the load must not be greater than the size of the fixed weight for the wagon. Finally, the top manhole, aeration spigot, cap, handwheel and side drain valves must also be sealed. Check that the taps and valve for the heating system are closed. When filling the tank from the bottom, the same procedure should be followed - the UNO course provides detailed information on the procedure with exercises.
Emptying takes place through the main valve and one of the side discharge valves using a pump or by gravity. Preparatory operations are similar to those for filling the tank. When emptying, connect the discharge line to the side discharge valve, open the valve, the aeration stub or the top hatch in case it is not present, and the main valve. When finished, proceed in a similar way as for the completion of the filling of the tank, remembering to carry out the operations to drain off all the product.