The degree of filling prescribed in 4.2.1.9.3 shall not be exceeded: Degree of filling = 95 / (1 + alpha x (tr - tf)) where alpha = mean coefficient of cubical expansion of the liquid between tf and tr; tr = maximum mean bulk temperature during carriage [°C]; tf = mean temperature of the liquid during filling [°C].

A portable tank having a minimum test pressure of 2.65 bar may be used if it is shown that a test pressure of 2.65 bar or less is acceptable according to the test pressure definition in 6.7.2.1.

Tanks shall not be used for the carriage of foodstuffs, articles of consumption or animal feeds.

Fixed tanks (tank-vehicles), demountable tanks and battery-vehicles: Fittings and accessories mounted in the upper part of the tank shall be either: - inserted in a recessed housing; or - equipped with an internal safety valve; or - shielded by a cap, or by transverse and/or longitudinal members, or by other equally effective devices, so profiled that in the event of overturning the fittings and accessories will not be damaged. Fittings and accessories mounted in the lower part of the tank: Pipe-sockets, lateral shut-off devices, and all discharge devices shall either be recessed by at least 200 mm from the extreme outer edge of the tank or be protected by a rail having a coefficient of inertia of not less than 20 cm³ transversally to the direction of travel; their ground clearance shall be not less than 300 mm with the tank full. Fittings and accessories mounted on the rear face of the tank shall be protected by the bumper prescribed in 9.7.6. Their height above the ground shall be such that they are adequately protected by the bumper. Tank-containers, tank swap bodies and MEGCs: (Reserved)