Additional provisions applicable to the carriage of Class 8 substances in portable tanks
Pressure-relief devices of portable tanks used for the carriage of Class 8 substances shall be inspected
at intervals not exceeding one year.
Additional provisions applicable to the carriage of Class 9 substances in portable tanks
Additional provisions applicable to the carriage of solid substances carried above their melting point
Solid substances carried or offered for carriage above their melting point which are not assigned a
portable tank instruction in column (10) of the Table A of Chapter 3.2 or when the assigned portable
tank instruction does not apply to carriage at temperatures above their melting point may be carried in
portable tanks provided that the solid substances are classified in Classes 4.1, 4.2, 4.3, 5.1, 6.1, 8 or 9
and have no subsidiary risk other than that of Class 6.1 or Class 8 and are in packing group II or III.
Unless otherwise indicated in the Table A of Chapter 3.2, portable tanks used for the carriage of these
solid substances above their melting point shall conform to the provisions of portable tank instruction
T4 for solid substances of packing group III or T7 for solid substances of packing group II. A portable
tank which affords an equivalent or greater level of safety may be selected according to 18.104.22.168.5. The
maximum degree of filling (in %) shall be determined according to 22.214.171.124.5 (TP3).
General provisions for the use of portable tanks for the carriage of non-refrigerated liquefied gases and chemicals under pressure
This section provides general provisions applicable to the use of portable tanks for the carriage of nonrefrigerated liquefied gases and chemicals under pressure.
Portable tanks shall conform to the design, construction, inspection and testing requirements detailed
in 6.7.3. Non-refrigerated liquefied gases and chemicals under pressure shall be carried in portable
tanks conforming to portable tank instruction T50 as described in 126.96.36.199.6 and any portable tank
special provisions assigned to specific non-refrigerated liquefied gases in Column (11) of Table A of
Chapter 3.2 and described in 188.8.131.52.
During carriage, portable tanks shall be adequately protected against damage to the shell and service
equipment resulting from lateral and longitudinal impact and overturning. If the shell and service
equipment are so constructed as to withstand impact or overturning it need not be protected in this
way. Examples of such protection are given in 184.108.40.206.5.
Certain non-refrigerated liquefied gases are chemically unstable. They are accepted for carriage only
when the necessary steps have been taken to prevent their dangerous decomposition, transformation or
polymerization during carriage. To this end, care shall in particular be taken to ensure that portable
tanks do not contain any non-refrigerated liquefied gases liable to promote these reactions.
Unless the name of the gas(es) being carried appears on the metal plate described in 220.127.116.11.2, a copy
of the certificate specified in 18.104.22.168.1 shall be made available upon a competent authority request
and readily provided by the consignor, consignee or agent, as appropriate.
Empty portable tanks not cleaned and not gas-free shall comply with the same provisions as portable
tanks filled with the previous non-refrigerated liquefied gas.
Prior to filling the portable tank shall be inspected to ensure that it is authorized for the nonrefrigerated
liquefied gas or the propellant of the chemical under pressure to be carried and that the
portable tank is not loaded with non-refrigerated liquefied gases, or with chemicals under pressure
which in contact with the materials of the shell, gaskets, service equipment and any protective linings,
are likely to react dangerously with them to form dangerous products or appreciably weaken these
materials. During filling, the temperature of the non-refrigerated liquefied gas or propellant of
chemicals under pressure shall fall within the limits of the design temperature range.