Vacuum-relief devices and spring-loaded valves shall be provided with flame arresters. Due attention shall be paid to the reduction of the relief capacity caused by the flame arrester.
Service equipment such as valves and external piping shall be so arranged that no substance remains in them after filling the portable tank.
Portable tanks may be either insulated or protected by a sun-shield. If the SADT of the substance in the portable tank is 55 °C or less, or the portable tank is constructed of aluminium, the portable tank shall be completely insulated. The outer surface shall be finished in white or bright metal.
The degree of filling shall not exceed 90% at 15 °C.
The mark as required in 6.7.2.20.2 shall include the UN number and the technical name with the approved concentration of the substance concerned.
Organic peroxides and self-reactive substances specifically listed in portable tank instruction T23 in 4.2.5.2.6 may be carried in portable tanks.
Additional provisions applicable to the carriage of Class 6.1 substances in portable tanks
Additional provisions applicable to the carriage of Class 6.2 substances in portable tanks
Additional provisions applicable to the carriage of Class 7 substances in portable tanks
Portable tanks used for the carriage of radioactive material shall not be used for the carriage of other goods.
The degree of filling for portable tanks shall not exceed 90% or, alternatively, any other value approved by the competent authority.
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.