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 184.108.40.206.6 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 220.127.116.11.
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 18.104.22.168.5.
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 22.214.171.124.2, a copy
of the certificate specified in 126.96.36.199.1 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.
The maximum mass of non-refrigerated liquefied gas per litre of shell capacity (kg/l) shall not exceed
the density of the non-refrigerated liquefied gas at 50 °C multiplied by 0.95. Furthermore, the shell
shall not be liquid-full at 60 °C.
Portable tanks shall not be filled above their maximum permissible gross mass and the maximum
permissible load mass specified for each gas to be carried.
Portable tanks shall not be offered for carriage:
(a) In an ullage condition liable to produce an unacceptable hydraulic force due to surge within the
(b) When leaking;
(c) When damaged to such an extent that the integrity of the 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 188.8.131.52.4 need not be provided with a means of closing
off the forklift pockets.
General provisions for the use of portable tanks for the carriage of refrigerated liquefied gases
This section provides general provisions applicable to the use of portable tanks for the carriage of
refrigerated liquefied gases.