In addition to the vehicle proper, or the units of running gear used in its stead, a tank-vehicle
comprises one or more shells, their items of equipment and the fittings for attaching them to the
vehicle or to the running-gear units.

Once the demountable tank has been attached to the carrier vehicle, the entire unit shall meet the
requirements prescribed for tank-vehicles.

Requirements concerning tanks

Fixed tanks or demountable tanks made of metal shall meet the relevant requirements of Chapter 6.8.

Elements of battery-vehicles and of MEGCs shall meet the relevant requirements of Chapter 6.2 in the
case of cylinders, tubes, pressure drums and bundles of cylinders and the requirements of Chapter 6.8
in the case of tanks.

Tank-containers made of metal shall meet the requirements of Chapter 6.8, portable tanks shall meet
the requirements of Chapter 6.7 or, if applicable, those of the IMDG Code (see 1.1.4.2).

Tanks made of fibrereinforced
plastics material shall meet the requirements of Chapter 6.9.

Vacuum-operated waste tanks shall meet the requirements of Chapter 6.10.

Fastenings

Fastenings shall be designed to withstand static and dynamic stresses in normal conditions of carriage,
and minimum stresses as defined in 6.8.2.1.2, 6.8.2.1.11 to 6.8.2.1.13, 6.8.2.1.15 and 6.8.2.1.16 in the
case of tank-vehicles, battery-vehicles, and vehicles carrying demountable tanks.

Earthing of FL vehicles

Tanks made of metal or of fibrereinforced
plastics material of FL tank-vehicles and battery elements
of FL batteryvehicles
shall be linked to the chassis by means of at least one good electrical
connection. Any metal contact capable of causing electrochemical corrosion shall be avoided.
 
NOTE: See also 6.9.1.2 and 6.9.2.14.3.

Stability of tank-vehicles

 
The overall width of the ground-level bearing surface (distance between the outer points of contact
with the ground of the right-hand tyre and the left-hand tyre of the same axle) shall be at least 
equal to 90% of the height of the centre of gravity of the laden tank-vehicle. In an articulated 
vehicle the mass on the axles of the load-carrying unit of the laden semi-trailer shall not exceed 
60% of the nominal
total laden mass of the complete articulated vehicle.
 

In addition, tank-vehicles with fixed tanks with a capacity of more than 3 m3 intended for the carriage
of dangerous goods in the liquid or molten state tested with a pressure of less than 4 bar, shall comply
with the technical requirements of ECE Regulation No. 111 1 for lateral stability, as amended, in
accordance with the dates of application specified therein. The requirements are applicable to tankvehicles
which are first registered as from 1 July 2003.

Rear protection of vehicles

A bumper sufficiently resistant to rear impact shall be fitted over the full width of the tank at the rear
of the vehicle. There shall be a clearance of at least 100 mm between the rear wall of the tank and the
rear of the bumper (this clearance being measured from the rearmost point of the tank wall or from
projecting fittings or accessories in contact with the substance being carried). Vehicles with a tilting
shell for the carriage of powdery or granular substances and a vacuumoperated
waste tank with a
tilting shell with rear discharge do not require a bumper if the rear fittings of the shell are provided
with a means of protection which protects the shell in the same way as a bumper.
NOTE 1: This provision does not apply to vehicles used for the carriage of dangerous goods in
tankcontainers,
MEGCs or portable tanks.
NOTE 2: For the protection of tanks against damage by lateral impact or overturning, see 6.8.2.1.20
and 6.8.2.1.21 or, for portable tanks, 6.7.2.4.3 and 6.7.2.4.5.

Combustion heaters

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