TU16

When handed over for carriage, uncleaned empty tanks shall be filled with a protective

agent fulfilling one of the following measures:

Protective agent	Degree of filling of water	Additional requirements for carriage at low ambient temperatures
Nitrogena	–
Water and nitrogena	–
Water	not less than 96 % and not more than 98 %	The water shall contain sufficient anti-freeze agent to prevent it from freezing. The anti-freeze agent shall be free from corrosive action and not liable to react with the substance.

a The tank shall be filled with nitrogen in such a way that, even after cooling, the

pressure at no time falls below atmospheric pressure. The tank shall be closed in such a

way that no leakage of gas occurs.