Dangerous Goods by Road
The provisions of 4.2.1.9.2 to 4.2.1.9.4.1 do not apply to portable tanks which contain substances
maintained at a temperature above 50 °C during carriage (e.g. by means of a heating device). For
portable tanks equipped with a heating device, a temperature regulator shall be used to ensure the
maximum degree of filling is not more than 95% full at any time during carriage.
The maximum degree of filling (in %) for solids carried above their melting point and for elevated
temperature liquids shall be determined by the following formula:
in which df and dr are the densities of the liquid at the mean temperature of the liquid during filling
and the maximum mean bulk temperature during carriage respectively.
Portable tanks shall not be offered for carriage:
(a) With a degree of filling, for liquids having a viscosity less than 2 680 mm2/s at 20 °C or
maximum temperature of the substance during carriage in the case of the heated substance, of
more than 20% but less than 80% unless the shells of portable tanks are divided, by partitions
or surge plates, into sections of not more than 7 500 litres capacity;
(b) With residue of substances previously carried adhering to the outside of the shell or service
equipment;
(c) When leaking or damaged to such an extent that the integrity of the portable tank or its lifting
or securing arrangements may be affected; and
(d) Unless the service equipment has been examined and found to be in good working order.
Forklift pockets of portable tanks shall be closed off when the tank is filled. This provision does not
apply to portable tanks which according to 6.7.2.17.4 need not be provided with a means of closing
off the forklift pockets.
Additional provisions applicable to the carriage of Class 3 substances in portable tanks
All portable tanks intended for the carriage of flammable liquids shall be closed and be fitted with
relief devices in accordance with 6.7.2.8 to 6.7.2.15.
For portable tanks intended for use only on land, open venting systems may be used if allowed
according to Chapter 4.3.
Additional provisions applicable to the carriage of Classes 4.1, 4.2 or 4.3 substances (other than Class 4.1 self-reactive substances) in portable tanks
(Reserved)
NOTE: For Class 4.1 self-reactive substances, see 4.2.1.13.1.
Additional provisions applicable to the carriage of Class 5.1 substances in portable tanks
(Reserved)
Additional provisions applicable to the carriage of Class 5.2 substances and Class 4.1 self-reactive substances in portable tanks
Each substance shall have been tested and a report submitted to the competent authority of the country
of origin for approval. Notification thereof shall be sent to the competent authority of the country of
destination. The notification shall contain relevant transport information and the report with test
results. The tests undertaken shall include those necessary:
(a) To prove the compatibility of all materials normally in contact with the substance during
carriage;
(b) To provide data for the design of the pressure and emergency relief devices taking into account
the design characteristics of the portable tank.
Any additional provision necessary for safe carriage of the substance shall be clearly described in the
report.
The following provisions apply to portable tanks intended for the carriage of Type F organic
peroxides or Type F self-reactive substances with a Self-Accelerating Decomposition Temperature
(SADT) of 55 °C or more. In case of conflict these provisions prevail over those specified in Section
6.7.2. Emergencies to be taken into account are self-accelerating decomposition of the substance and
fire-engulfment as described in 4.2.1.13.8.
The additional provisions for carriage of organic peroxides or self-reactive substances with a SADT
less than 55 °C in portable tanks shall be specified by the competent authority of the country of origin.
Notification thereof shall be sent to the competent authority of the country of destination.
The portable tank shall be designed for a test pressure of at least 0.4 MPa (4 bar).
Portable tanks shall be fitted with temperature sensing devices.