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

Combustion heaters shall meet the requirements of 9.2.4.7.1, 9.2.4.7.2, 9.2.4.7.5 and the following:
(a) The switch may be installed outside the driver's cab;
(b) The device may be switched off from outside the load compartment; and
(c) It is not necessary to prove that the heat exchanger is resistant to the reduced afterrunning
cycle.
In addition for FL vehicles, they shall meet the requirements of 9.2.4.7.3 and 9.2.4.7.4.

If the vehicle is intended for the carriage of dangerous goods for which a label conforming to models
Nos. 1.5, 3, 4.1, 4.3, 5.1 or 5.2 is prescribed, no fuel tanks, power sources, combustion air or heating
air intakes as well as exhaust tube outlets required for the operation of the combustion heater shall be
installed in the load compartment. It shall be ensured that the heating air outlet cannot be blocked by
cargo. The temperature to which the load is heated shall not exceed 50 ºC. Heating devices installed
inside the load compartments shall be designed so as to prevent the ignition of an explosive
atmosphere under operating conditions.

Electrical equipment

The electrical installation on FL vehicles shall meet the relevant requirements of 9.2.2.1, 9.2.2.2,
9.2.2.4, 9.2.2.5, 9.2.2.6, 9.2.2.8 and 9.2.2.9.1.
However additions to or modifications of the electrical installations of the vehicle shall meet the
requirements for the electrical apparatus of the relevant group and temperature class according to the
substances to be carried.
NOTE: For transitional provisions, see also 1.6.5.
 
1 ECE Regulation No. 111: Uniform provisions concerning the approval of tank-vehicles of categories N and O
with regard to rollover stability.
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