The portable tank instruction assigned for this substance applies to granular and powdered solids and to solids which are filled and discharged at temperatures above their melting point which are cooled and carried as a solid mass. For solids which are carried above their melting point, see 4.2.1.19.

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)