General orange-coloured plate marking provisions

Transport units carrying dangerous goods shall display two rectangular orange-coloured plates
conforming to 5.3.2.2.1, set in a vertical plane. They shall be affixed one at the front and the other at
the rear of the transport unit, both perpendicular to the longitudinal axis of the transport unit. They
shall be clearly visible.
If a trailer containing dangerous goods is detached from its motor vehicle during carriage of
dangerous goods, an orange-coloured plate shall remain affixed to the rear of the trailer. When tanks
are marked in accordance with 5.3.2.1.3, this plate shall correspond to the most hazardous substance
carried in the tank.

When a hazard identification number is indicated in Column (20) of table A of Chapter 3.2, tankvehicles,
battery vehicles or transport units having one or more tanks carrying dangerous goods shall
in addition display on the sides of each tank, each tank compartment or each element of battery
vehicles, clearly visible and parallel to the longitudinal axis of the vehicle, orange-coloured plates
identical with those prescribed in 5.3.2.1.1. These orange-coloured plates shall bear the hazard
identification number and the UN number prescribed respectively in Columns (20) and (1) of table A
of Chapter 3.2 for each of the substances carried in the tank, in a compartment of the tank or in an
element of a battery vehicle. For MEMUs these requirements shall only apply to tanks with a capacity
of 1 000 litres or more and bulk containers.

For tank-vehicles or transport units having one or more tanks carrying substances with UN Nos. 1202,
1203 or 1223, or aviation fuel classified under UN Nos. 1268 or 1863, but no other dangerous
substance, the orange-coloured plates prescribed in 5.3.2.1.2 need not be affixed if the plates affixed
to the front and rear in accordance with 5.3.2.1.1 bear the hazard identification number and the UN 
number prescribed for the most hazardous substance carried, i.e. the substance with the lowest flashpoint.

When a hazard identification number is indicated in Column (20) of Table A of Chapter 3.2, transport
units and containers carrying unpackaged solids or articles or packaged radioactive material with a
single UN number required to be carried under exclusive use and no other dangerous goods shall in
addition display on the sides of each transport unit or container, clearly visible and parallel to the
longitudinal axis of the vehicle, orange-coloured plates identical with those prescribed in 5.3.2.1.1.
These orange-coloured plates shall bear the hazard identification number and the UN number
prescribed respectively in Columns (20) and (1) of table A of Chapter 3.2 for each of the substances
carried in bulk in the transport unit or in the container or for the packaged radioactive material when
required to be carried under exclusive use in the transport unit or in the container.

If the orange-coloured plates prescribed in 5.3.2.1.2 and 5.3.2.1.4 affixed to the containers,
tank-containers, MEGCs or portable tanks are not clearly visible from outside the carrying vehicle, the
same plates shall also be affixed to both sides of the vehicle.
 
NOTE: This paragraph need not be applied to the marking with orange coloured plates of closed and
sheeted vehicles, carrying tanks with a maximum capacity of 3 000 litres.

 

For transport units carrying only one dangerous substance and no non-dangerous substance, the
orange-coloured plates prescribed in 5.3.2.1.2, 5.3.2.1.4 and 5.3.2.1.5 shall not be necessary provided
that those displayed at the front and rear in accordance with 5.3.2.1.1 bear the hazard identification
number and the UN number for that substance prescribed respectively in Columns (20) and (1) of
Table A of Chapter 3.2.

The requirements of 5.3.2.1.1 to 5.3.2.1.5 are also applicable to empty fixed or demountable tanks,
battery-vehicles, tank-containers, portable tanks and MEGCs, uncleaned, not degassed or not
decontaminated, MEMUs, uncleaned as well as to empty vehicles and containers for carriage in bulk,
uncleaned or not decontaminated.

Orange-coloured plates which does not relate to dangerous goods carried, or residues thereof, shall be
removed or covered. If plates are covered, the covering shall be total and remain effective after 15
minutes’ engulfment in fire.

Specifications for the orange-coloured plates

The orange-coloured plates shall be reflectorized and shall be of 40 cm base and of 30 cm high; they
shall have a black border of 15 mm wide. The material used shall be weather-resistant and ensure
durable marking. The plate shall not become detached from its mount in the event of 15 minutes’
engulfment in fire. It shall remain affixed irrespective of the orientation of the vehicle. The orangecoloured
plates may be separated in their middle with a black horizontal line of 15 mm thickness.
If the size and construction of the vehicle are such that the available surface area is insufficient to affix
these orange-coloured plates, their dimensions may be reduced to a minimum of 300 mm for the base,
120 mm for the height and 10 mm for the black border. In this case, a different set of dimensions
within the specified range may be used for the two orange-coloured plates specified in 5.3.2.1.1.
When reduced dimensions of orange-coloured plates are used for a packaged radioactive material
carried under exclusive use, only the UN number is required and the size of the digits stipulated in
5.3.2.2.2 may be reduced to 65 mm in height and 10 mm in stroke thickness.
For containers carrying dangerous solid substances in bulk and for tank-containers, MEGCs and
portable tanks, the plates prescribed in 5.3.2.1.2, 5.3.2.1.4 and 5.3.2.1.5 may be replaced by a selfadhesive
sheet, by paint or by any other equivalent process. This alternative marking shall conform to
the specifications set in this sub-section except for the provisions concerning resistance to fire
mentioned in 5.3.2.2.1 and 5.3.2.2.2.
NOTE: The colour of the orange plates in conditions of normal use should have chromaticity coordinates
lying within the area on the chromaticity diagram formed by joining the following coordinates:
 

Chromaticity co-ordinates of points at the corners of the area on the chromaticity diagram

x y

0.52

0.38

0.52

0.40

0.578

0.422

0.618

0.38

 

Luminance factor of reflectorized colour: β > 0.12.

Reference centre E, standard illuminant C, normal incidence 45°, viewed at 0°.

Co-efficient of reflex luminous intensity at an angle of illumination of 5°, viewed at 0.2°: not less than 20 candelas per lux per m2.

 

The hazard identification number and the UN number shall consist of black digits 100 mm high and of
15 mm stroke thickness. The hazard-identification number shall be inscribed in the upper part of the
plate and the UN number in the lower part; they shall be separated by a horizontal black line, 15 mm
in stroke width, extending from side to side of the plate at mid-height (see 5.3.2.2.3).The hazard
identification number and the UN number shall be indelible and shall remain legible after 15 minute’
engulfment in fire. Interchangeable numbers and letters on plates presenting the hazard identification
number and the UN number shall remain in place during carriage and irrespective of the orientation of
the vehicle.

Example of orange-coloured plate with hazard identification number and UN number

The permitted tolerances for dimensions specified in this sub-section are ± 10%.

When the orange-coloured plate is affixed to folding panels, they shall be designed and secured so
that they cannot unfold or come loose from the holder during carriage (especially as a result of
impacts or unintentional actions).
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