A substance subject to ADR may be carried in fixed tanks (tank-vehicles), demountable tanks, batteryvehicles,
tank-containers, tank swap bodies and MEGCs only when provision is made for a tank code
according to 18.104.22.168.1 and 22.214.171.124.1 in Column (12) of Table A in Chapter 3.2.
The required type of tank, battery-vehicle and MEGC is given in code form in Column (12) of Table
A in Chapter 3.2. The explanations for reading the four parts of the code are given in 126.96.36.199.1 (when
the substance to be carried belongs to Class 2) and in 188.8.131.52.1 (when the substance to be carried
belongs to Classes 1 and 3 to 9)1.
The required type according to 184.108.40.206.2 corresponds to the least stringent construction requirements
which are acceptable for the dangerous substance in question unless otherwise prescribed in this
Chapter or in Chapter 6.8. It is possible to use tanks corresponding to codes prescribing a higher
minimum calculation pressure, or more stringent requirements for filling or discharge openings or for
safety valves/devices (see 220.127.116.11.1 for Class 2 and 18.104.22.168.1 for Classes 3 to 9).
1 An exception is made for tanks intended for the carriage of substances of classes 1, 5.2 or 7 (see 22.214.171.124.3).
For certain substances, tanks, battery-vehicles or MEGCs are subject to additional provisions which
are included as special provisions in Column (13) of Table A in Chapter 3.2.
Tanks, battery-vehicles and MEGCs shall not be loaded with any dangerous substances other than
those for the carriage of which they have been approved according to 126.96.36.199.1 and which, in contact
with the materials of the shell, gaskets, equipment and protective linings, are not liable to react
dangerously with them (see "dangerous reaction" in 1.2.1), to form dangerous products or appreciably
to weaken these materials2.
Foodstuffs shall not be carried in tanks used for dangerous substances unless the necessary steps have
been taken to prevent any harm to public health.
The tank record shall be retained by the owner or the operator who shall be able to provide this
documentation at the request of the competent authority. The tank record shall be maintained
throughout the life of the tank and retained for 15 months after the tank is taken out of service.
Should a change of owner or operator occur during the life of the tank the tank record shall be
transferred without delay to the new owner or operator.
Copies of the tank record or all necessary documents shall be made available to the expert for tests,
inspections and checks on tanks in accordance with 188.8.131.52.5 or 184.108.40.206.18, on the occasion of periodic
inspections or exceptional checks.
Degree of filling
The following degrees of filling shall not be exceeded in tanks intended for the carriage of liquids at
(a) for flammable substances, environmentally hazardous substances and flammable
environmentally hazardous substances, without additional risks (e.g. toxicity or corrosivity), in
tanks with a breather device or with safety valves (even where preceded by a bursting disc):
In these formulae, α is the mean coefficient of cubical expansion of the liquid between 15 °C and
50 °C, i.e. for a maximum variation in temperature of 35 °C.
2 It may be necessary to consult the manufacturer of the substance and the competent authority for guidance on
the compatibility of the substance with the materials of the tank, battery-vehicle or MEGC.
α is calculated by the formula:
where d15 and d50 are the relative densities of the liquid at 15 °C and 50 °C respectively.
tF is the mean temperature of the liquid during filling.
The provisions of 220.127.116.11.1 (a) to (d) above shall not apply to tanks whose contents are, by means of a
heating device, maintained at a temperature above 50 °C during carriage. In this case the degree of
filling at the outset shall be such, and the temperature so regulated, that the tank is not full to more
than 95% of its capacity and that the filling temperature is not exceeded, at any time during carriage.
Shells intended for the carriage of substances in the liquid state or liquefied gases or refrigerated
liquefied gases, which are not divided by partitions or surge plates into sections of not more than
7 500 litres capacity, shall be filled to not less than 80% or not more than 20% of their capacity.
This provision is not applicable to:
- liquids with a kinematic viscosity at 20 °C of at least 2 680 mm2/s;
- molten substances with a kinematic viscosity at the temperature of filling of at least
2 680 mm2/s;
- UN 1963 HELIUM, REFRIGERATED, LIQUID and UN 1966 HYDROGEN,
The thickness of the walls of the shell shall not, throughout its use, fall below the minimum figure
18.104.22.168.17 to 22.214.171.124.21. | 126.96.36.199.17 to 188.8.131.52.