General provisions

Where hot substances are loaded, the temperature of the outer surface of the tank or of the thermal
insulation shall not exceed 70 °C during carriage.

The connecting pipes between independent but
interconnected tanks of a transport unit shall be
empty during carriage. Flexible filling and
discharge pipes which are not permanently
connected to the shells shall be empty during
carriage.

(Reserved)

Special provisions

When they are shown under an entry in Column (13) of Table of A in Chapter 3.2, the following
special provisions apply:
TU1 The tanks shall not be handed over for carriage until the substance has solidified completely
and been covered by an inert gas. Uncleaned empty tanks which have contained these
substances shall be filled with an inert gas.
TU2 The substance shall be covered by an inert gas. Uncleaned empty tanks which have
contained these substances shall be filled with an inert gas.
TU3 The inside of the shell and all parts liable to come into contact with the substance shall be
kept clean. No lubricant capable of combining dangerously with the substance shall be used
for pumps, valves or other devices.
TU4 During carriage, these substances shall be under a layer of inert gas, the gauge pressure of
which shall not be less than 50 kPa (0.5 bar).
Uncleaned empty tanks which have contained these substances shall when handed over for
carriage be filled with an inert gas at a gauge pressure of at least 50 kPa (0.5 bar).
TU5 (Reserved)
TU6 Not authorized for carriage in tanks, battery-vehicles and MEGCs when having a LC50
lower than 200 ppm.
TU7 The materials used to ensure leakproofness of the joints or for the maintenance of the
closures shall be compatible with the contents.
TU8 An aluminiumalloy
tank shall not be used for carriage unless the tank is reserved solely for
such carriage and the acetaldehyde is free from acid.
TU9 UN No.1203 petrol (gasoline) with a vapour pressure at 50 °C of more than 110 kPa (1.1
bar) but not above 150 kPa (1.5 bar) may also be carried in tanks designed according to
6.8.2.1.14 (a) and having equipment conforming to 6.8.2.2.6.
TU10 (Reserved)
TU11 During filling, the temperature of this substance shall not exceed 60 °C. A maximum filling
temperature of 80 °C is allowed provided that smoulder spots are prevented and that the
following conditions are met. After filling, the tanks shall be pressurized (e.g. with
compressed air) to check tightness. It shall be ensured that no depressurization takes place
during carriage. Before discharge, it shall be checked if pressure in the tanks is still above
atmospheric. If this is not the case, an inert gas shall be introduced into the tanks prior to
discharge.
TU12 In the event of a change of use, shells and equipment shall be thoroughly cleansed of all
residues before and after the carriage of this substance.
TU13 Tanks shall be free from impurities at the time of filling. Service equipment such as valves
and external piping shall be emptied after filling or discharging.
TU14 The protective caps of closures shall be locked during carriage.
TU15 Tanks shall not be used for the carriage of foodstuffs, articles of consumption or animal
feeds.
TU16 When handed over for carriage, uncleaned empty tanks shall be filled with a protective
agent fulfilling one of the following measures:
 

 

Protective agent

Degree of filling of water

Additional requirements for carriage at low ambient temperatures

Nitrogena

 

Water and nitrogena

 

Water

not less than 96 % and not more than 98 %

The water shall contain sufficient anti-freeze agent to prevent it from freezing. The anti-freeze agent shall be free from corrosive action and not liable to react with the substance.

a The tank shall be filled with nitrogen in such a way that, even after cooling, the
pressure at no time falls below atmospheric pressure. The tank shall be closed in such a
way that no leakage of gas occurs.
TU17 Only to be carried in battery-vehicles or MEGCs the elements of which are composed of
receptacles.
TU18 The degree of filling shall remain below the level at which, if the contents were raised to a
temperature at which the vapour pressure equalled the opening pressure of the safety valve,
the volume of the liquid would reach 95% of the tank’s capacity at that temperature. The
provision in 4.3.2.3.4 shall not apply.
TU19 Tanks may be filled to 98% at the filling temperature and pressure. The provision in
4.3.2.3.4 shall not apply.
TU20 (Reserved)
TU21 The substance shall be protected by a protective agent in the following ways:
 

Protective agent

A layer of water in the tank

Degree of filling of the substance (including water if any) at a temperature of

60° C shall not exceed

Additional requirements for carriage at low ambient temperatures

Nitrogena

96 %

Water and nitrogena

98 %

The water shall contain sufficient anti- freeze agent to prevent it from freezing. The anti-freeze agent shall be free from corrosive action and not liable to react with the substance.

Water

not less than 12 cm

98 %

a The remaining space of the tank shall be filled with nitrogen in such a way that, even after cooling,
the pressure at no time falls below atmospheric pressure. The tank shall be closed in such a way that
no leakage of gas occurs.
TU22 Tanks shall be filled to not more than 90% of their capacity; for liquids, a space of 5% shall
remain empty when the liquid is at an average temperature of 50 °C.
TU23 The degree of filling shall not exceed 0.93 kg per litre of capacity, if filling is by mass. If
filling is by volume, the degree of filling shall not exceed 85%.
TU24 The degree of filling shall not exceed 0.95 kg per litre of capacity, if filling is by mass. If
filling is by volume, the degree of filling shall not exceed 85%.
TU25 The degree of filling shall not exceed 1.14 kg per litre of capacity, if filling is by mass. If
filling is by volume, the degree of filling shall not exceed 85%.
TU26 The degree of filling shall not exceed 85%.
TU27 Tanks shall not be filled to more than 98% of their capacity.
TU28 Tanks shall be filled to not more than 95% of their capacity at a reference temperature of
15 °C.
TU29 Tanks shall be filled to not more than 97% of their capacity and the maximum temperature
after filling shall not exceed 140 °C.
TU30 Tanks shall be filled as set out in the test report for the type approval of the tank but shall
be filled to not more than 90% of their capacity.
TU31 Tanks shall not be filled to more than 1 kg per litre of capacity.
TU32 Tanks shall not be filled to more than 88% of their capacity.
TU33 Tanks shall be filled to not less than 88% and not more than 92% of their capacity or to
2.86 kg per litre of capacity.
TU34 Tanks shall not be filled to more than 0.84 kg per litre of capacity.
TU35 Empty fixed tanks (tank-vehicles), empty demountable tanks and empty tank-containers,
uncleaned, which have contained these substances are not subject to the requirements of
ADR if adequate measures have been taken to nullify any hazard.
TU36 The degree of filling according to 4.3.2.2, at the reference temperature of 15 °C, shall not
exceed 93% of the capacity.
TU37 Carriage in tanks is limited to substances containing pathogens which are unlikely to be a
serious hazard, and for which, while capable of causing serious infection on exposure,
effective treatment and preventive measures are available and the risk of spread of infection
is limited (i.e. moderate individual risk and low community risk).
TU38 (Reserved)
TU39 The suitability of the substance for carriage in tanks shall be demonstrated. The method to
evaluate this suitability shall be approved by the competent authority. One method is test
8(d) in Test Series 8 (see Manual of Tests and Criteria, Part 1, sub-section 18.7).
Substances shall not be allowed to remain in the tank for any period that could result in
caking. Appropriate measures shall be taken to avoid accumulation and packing of
substances in the tank (e.g. cleaning etc.).
TU40 Only to be carried in battery-vehicles or MEGCs, the elements of which are composed of
seamless receptacles.
TU41 The suitability of the substance for carriage in tanks shall be demonstrated to the
satisfaction of the competent authority of every country through or into which the carriage
is performed.
The method to evaluate this suitability shall be approved by the competent authority of any
ADR Contracting Party who may also recognize an approval granted by the competent
authority of a country which is not an ADR Contracting Party provided that this approval
has been granted in accordance with the procedures applicable according to ADR, RID,
ADN or the IMDG Code.
Substances shall not be allowed to remain in the tank for any period that could result in
caking. Appropriate measures shall be taken to avoid accumulation and packing of
substances in the tank (e.g. cleaning etc.).

 

4.4

USE OF FIBRE-REINFORCED PLASTICS (FRP) TANKS, FIXED TANKS (TANK-VEHICLES), DEMOUNTABLE TANKS, TANK-CONTAINERS AND TANK SWAP BODIES

NOTE: For portable tanks and UN multiple-element gas containers (MEGCs), see Chapter 4.2; for fixed
tanks (tank-vehicles), demountable tanks, tank-containers and tank swap bodies, with shells made of
metallic materials, and battery-vehicles and multiple elements gas containers (MEGCs) other than
UN MEGCs, see Chapter 4.3; for vacuum operated waste containers, see Chapter 4.5.

General

The carriage of dangerous substances in fibre-reinforced plastics (FRP) tanks is permitted only when
the following conditions are met:
(a) The substance is classified in Class 3, 5.1, 6.1, 6.2, 8 or 9;
(b) The maximum vapour pressure (absolute pressure) at 50 °C of the substance does not exceed
110 kPa (1.1 bar);
(c) The carriage of the substance in metallic tanks is authorized according to 4.3.2.1.1;
(d) The calculation pressure specified for that substance in part 2 of the tank code given in Column
(12) of Table A in Chapter 3.2 does not exceed 4 bar (see also 4.3.4.1.1); and
(e) The tank complies with the provisions of Chapter 6.9 applicable for the carriage of the
substance.

Operation

The provisions of 4.3.2.1.5 to 4.3.2.2.4, 4.3.2.3.3 to 4.3.2.3.6, 4.3.2.4.1, 4.3.2.4.2, 4.3.4.1 and 4.3.4.2
shall apply.

The temperature of the substance carried shall not exceed, at the time of filling, the maximum service
temperature indicated on the tank plate referred to in 6.9.6.

When applicable to carriage in metallic tanks, the special provisions (TU) of 4.3.5 shall also apply, as
indicated in Column (13) of Table A in Chapter 3.2.

4.5

USE OF VACUUM OPERATED WASTE TANKS

NOTE: For portable tanks and UN multiple-element gas containers (MEGCs), see Chapter 4.2; for fixed
tanks (tank-vehicles), demountable tanks, tank-containers and tank swap bodies, with shells made of
metallic materials, and battery-vehicles and multiple elements gas containers (MEGCs) other than
UN MEGCs, see Chapter 4.3; for fibre reinforced plastics tanks, see Chapter 4.4.

Use

Wastes consisting of substances in Classes 3, 4.1, 5.1, 6.1, 6.2, 8 and 9 may be carried in vacuumoperated
waste tanks conforming to Chapter 6.10 if their carriage in fixed tanks, demountable tanks,
tank-containers or tank swap bodies is permitted according to Chapter 4.3. Wastes consisting of
substances assigned to tank code L4BH in Column (12) of Table A of Chapter 3.2 or to another tank
code permitted under the hierarchy in 4.3.4.1.2 may be carried in vacuum operated waste tanks with
the letter "A" or "B" in part 3 of the tank code, as indicated in No. 9.5 of the vehicle approval
certificate conforming to 9.1.3.5.

Non waste substances may be carried in vacuum-operated waste tanks under the same conditions as
mentioned under 4.5.1.1.
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