Coding, rationalized approach and hierarchy of tanks

Coding of tanks

Part

Description

Tank code

1

Types of tank

L = tank for substances in the liquid state (liquids or solids handed over for carriage in the molten state);

 

S = tank for substances in the solid state (powdery or granular).

2

Calculation pressure

G = minimum calculation pressure according to the general requirements of 6.8.2.1.14; or

 

1.5; 2.65; 4; 10; 15 or 21=

minimum calculation pressure in bar (see 6.8.2.1.14).

3

Openings

(see 6.8.2.2.2)

A = tank with bottom-filling or bottom-discharge openings with 2 closures;

   

B = tank with bottom-filling or bottom-discharge openings with 3 closures;

 

C = tank with top-filling and discharge openings with only cleaning openings below the surface of the liquid;

 

D = tank with top-filling and discharge openings with no openings below the surface of the liquid.

4

Safety valves/devices

V = tank with a breather device, according to 6.8.2.2.6, but no device protecting against the propagation of a flame; or

non-explosion pressure shock resistant tank ;

 

F = tank with a breather device, according to 6.8.2.2.6, fitted with a device protecting against the propagation of a flame; or

explosion pressure shock resistant tank ;

 

N = tank without a breather device according to 6.8.2.2.6 and not hermetically closed;

   

B = tank with bottom-filling or bottom-discharge openings with 3 closures;

 

C = tank with top-filling and discharge openings with only cleaning openings below the surface of the liquid;

 

D = tank with top-filling and discharge openings with no openings below the surface of the liquid.

 

Rationalized approach for assignment of ADR tank codes to groups of substances and hierarchy of
tanks
NOTE: Certain substances and groups of substances are not included in the rationalized approach,
see 4.3.4.1.3.
 

ationalized approach

Tank code

Group of permitted substances

Class

Classification code

Packing group

LIQUIDS

LGAV

3

F2

III

9

M9

III

LGBV

4.1

F2

II, III

5.1

O1

III

9

M6

III

M11

III

and groups of permitted substances for tank code LGAV

LGBF

3

F1

II

vapour pressure at 50 °C ≤ 1.1 bar

F1

III

D

II

vapour pressure at 50 °C ≤ 1.1 bar

D

III

and groups of permitted substances for tank codes LGAV and LGBV

L1.5BN

3

F1

II

vapour pressure at 50 °C > 1.1 bar

F1

III

flash-point < 23 °C, viscous, vapour pressure at 50 °C > 1.1 bar boiling point > 35 °C

D

II

vapour pressure at 50 °C > 1.1 bar

and groups of permitted substances for tank codes LGAV, LGBV and LGBF

L4BN

3

F1

I,

III boiling point ≤ 35 °C

FC

III

D

I

5.1

O1

I, II

OT1

I

8

C1

II, III

C3

II, III

C4

II, III

C5

II, III

C7

II, III

C8

II, III

C9

II, III

C10

II, III

CF1

II

CF2

II

CS1

II

CW1

II

CW2

II

CO1

II

CO2

II

CT1

II, III

CT2

II, III

CFT

II

9

M11

III

and groups of permitted substances for tank codes LGAV, LGBV, LGBF and L1.5BN

Rationalized approach

Tank code

Group of permitted substances

Class

Classification code

Packing group

L4BH

3

FT1

II, III

FT2

II

FC

II

FTC

II

6.1

T1

II, III

T2

II, III

T3

II, III

T4

II, III

T5

II, III

T6

II, III

T7

II, III

TF1

II

TF2

II, III

TF3

II

TS

II

TW1

II

TW2

II

TO1

II

TO2

II

TC1

II

TC2

II

TC3

II

TC4

II

TFC

II

6.2

I3

II

I4

 

9

M2

II

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN and L4BN

L4DH

4.2

S1

II, III

S3

II, III

ST1

II, III

ST3

II, III

SC1

II, III

SC3

II, III

4.3

W1

II, III

WF1

II, III

WT1

II, III

WC1

II, III

8

CT1

II, III

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN, L4BN and L4BH

L10BH

8

C1

I

C3

I

C4

I

C5

I

C7

I

C8

I

C9

I

C10

I

CF1

I

СF2

I

CS1

I

СW1

I

СW2

I

CO1

I

CO2

I

CT1

I

CT2

I

COT

I

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN, L4BN, and L4BH

Rationalized approach

Tank code

Group of permitted substances

Class

Classification code

Packing group

L10CH

3

FT1

I

FT2

I

FC

I

FTC

I

6.1*

T1

I

T2

I

T3

I

T4

I

T5

I

T6

I

T7

I

TF1

I

TF2

I

TF3

I

TS

I

TW1

I

TO1

I

TC1

I

TC2

I

TC3

I

TC4

I

TFC

I

TFW

I

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN, L4BN, L4BH, and L10BH

Substances with an LC50 lower than or equal to 200 ml/mand saturated vapour concentration greater than or equal to 500 LC50 shall be assigned to tank code L15CH.

L10DH

4.3

W1

I

WF1

I

WT1

I

WC1

I

WFC

I

5.1

OTC

I

8

CT1

I

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN, L4BN, L4BH, L4DH, L10BH and L10CH

L15CH

3

FT1

I

6.1**

T1

I

T4

I

TF1

I

TW1

I

TO1

I

TC1

I

TC3

I

TFC

I

TFW

I

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN, L4BN, L4BH, L10BH and L10CH

** Substances with an LC50 lower than or equal to 200 ml/mand saturated vapour concentration greater than or equal to 500 LC50 shall be assigned to this tank code.

L21DH

4.2

S1

I

S3

I

SW

I

ST3

I

and groups of permitted substances for tank codes LGAV, LGBV, LGBF, L1.5BN, L4BN, L4BH, L4DH, L10BH, L10CH, L10DH and L15CH

Rationalized approach

Tank code

Group of permitted substances

Class

Classification code

Packing group

SOLIDS

SGAV

4.1

F1

III

F3

III

4.2

S2

II, III

   

S4

III

5.1

O2

II, III

8

C2

II, III

C4

III

C6

III

C8

III

C10

II, III

СT2

III

9

M7

III

M11

II, III

SGAN

4.1

F1

II

F3

II

FT1

II, III

FT2

II, III

FC1

II, III

FC2

II, III

4.2

S2

II

S4

II, III

ST2

II, III

ST4

II, III

SC2

II, III

SC4

II, III

4.3

W2

II, III

WF2

II

WS

II, III

WT2

II, III

WC2

II, III

5.1

O2

II, III

OT2

II, III

OC2

II, III

8

C2

II

С4

II

С6

II

С8

II

С10

II

CF2

II

CS2

II

CW2

II

CO2

II

CT2

II

9

M3

III

and groups of permitted substances for tank codes SGAV

SGAH

6.1

T2

II, III

T3

II, III

T5

II, III

T7

II, III

T9

II

TF3

II

TS

II

TW2

II

TO2

II

TC2

II

TC4

II

9

M1

II, III

and groups of permitted substances for tanks codes SGAV and SGAN

Rationalized approach

Tank code

Group of permitted substances

Class

Classification code

Packing group

S4AH

6.2

I3

II

9

M2

II

and groups of permitted substances for tanks codes SGAV, SGAN and SGAH

S10AN

8

C2

I

C4

I

   

C6

I

C8

I

C10

I

CF2

I

CS2

I

CW2

I

CO2

I

CT2

I

and groups of permitted substances for tank codes SGAV and SGAN

S10AH

6.1

T2

I

T3

I

T5

I

T7

I

TS

I

TW2

I

TO2

I

TC2

I

TC4

I

and groups of permitted substances for tank codes SGAV, SGAN, SGAH and S10AN

Rationalized approach

Tank code

Group of permitted substances

Class

Classification code

Packing group

S4AH

6.2

I3

II

9

M2

II

and groups of permitted substances for tanks codes SGAV, SGAN and SGAH

S10AN

8

C2

I

C4

I

   

C6

I

C8

I

C10

I

CF2

I

CS2

I

CW2

I

CO2

I

CT2

I

and groups of permitted substances for tank codes SGAV and SGAN

S10AH

6.1

T2

I

T3

I

T5

I

T7

I

TS

I

TW2

I

TO2

I

TC2

I

TC4

I

and groups of permitted substances for tank codes SGAV, SGAN, SGAH and S10AN

 

Hierarchy of tanks

Tanks with tank codes different from those indicated in this table or in Table A of Chapter 3.2 may also be used provided that any element (number or letter) of parts 1 to 4 of these tank codes correspond to a level of safety at least equivalent to the corresponding element of the tank code indicated in Table A of Chapter 3.2, according to the following increasing order:

Part 1: Types of tanks S  L

Part 2: Calculation pressure

 1.5  2.65  4  10  15  21 bar

Part 3: Openings A  B  C  D

Part 4: Safety valves/devices V  F  N  H

 

For example:

  • A tank with the tank code L10CN is authorized for the carriage of a substance to which the tank code L4BN has been assigned;

     

  • A tank with the tank code L4BN is authorized for the carriage of a substance to which the tank code SGAN has been assigned.

 

E: The hierarchy does not take account of any special provisions for each entry (see 4.3.5 and

.8.4).

 

The following substances and groups of substances in respect of which a "(+)" is given after the tank
code in Column (12) of Table A in Chapter 3.2 are subject to special provisions. In that case the
alternate use of the tanks for other substances and groups of substances is permitted only where this is
specified in the certificate of type approval. Higher value tanks according to the provisions at the end
of the table in 4.3.4.1.2 may be used with due regard to the special provisions indicated in Column
(13) of Table A in Chapter 3.2.
(a) Class 1
Division 1.5, UN No 0331 explosive, blasting, type B: code S2.65AN;
(b) Class 4.1:
UN No. 2448 sulphur, molten: code LGBV;
UN No. 3531 polymerizing substance, solid, stabilized, n.o.s, UN No. 3533 polymerizing
substance, solid, stabilized, temperature controlled, n.o.s.: code SGAN;
UN No. 3532 polymerizing substance, liquid, stabilized, n.o.s, UN No. 3534 polymerizing
substance, liquid, stabilized, temperature controlled, n.o.s.: code L4BN;
(c) Class 4.2:
UN No. 1381 phosphorus, white or yellow, dry, or under water or in solution and UN No.
2447 phosphorus, white molten: code L10DH;
(d) Class 4.3:
UN No. 1389 alkali metal amalgam, liquid, UN No. 1391 alkali metal dispersion or alkaline
earth metal dispersion, UN No. 1392 alkaline earth metal amalgam, liquid, UN No. 1415
lithium, UN No. 1420 potassium metal alloys, liquid, UN No. 1421 alkali metal alloy, liquid,
n.o.s, UN No. 1422 potassium sodium alloys, liquid, UN No. 1428 sodium,
UN No. 2257 potassium, UN No. 3401 alkali metal amalgam, solid, UN No. 3402 alkaline
earth metal amalgam, solid, 3403 potassium metal alloys, solid, UN No. 3404 potassium
sodium alloys, solid and UN No. 3482 alkali metal dispersion, flammable or UN No. 3482
alkaline earth metal dispersion, flammable: code L10BN;
UN No. 1407 caesium and UN No. 1423 rubidium: code L10CH;
UN No. 1402 calcium carbide, packing group I: code S2.65AN;
(e) Class 5.1:
UN No. 1873 perchloric acid 5072%:
code L4DN;
UN No. 2015 hydrogen peroxide, aqueous solution, stabilized with more than 70% hydrogen
peroxide: code L4DV;
UN No. 2014 hydrogen peroxide, aqueous solution with 20-60% hydrogen peroxide, UN No.
2015 hydrogen peroxide, aqueous solution, stabilized with 60-70% hydrogen peroxide, UN No.
2426 ammonium nitrate, liquid, hot concentrated solution with more than 80% but not more
than 93% and UN No. 3149 hydrogen peroxide and peroxyacetic acid mixture, stabilized: code
L4BV;
UN No. 3375 ammonium nitrate emulsion, suspension or gel, liquid: code LGAV;
UN No. 3375 ammonium nitrate emulsion, suspension or gel, solid: code SGAV;
(f) Class 5.2:
UN No. 3109 organic peroxide type F, liquid and UN No. 3119 organic peroxide, type F, liquid
temperature controlled: code L4BN;
UN No. 3110 organic peroxide, type F, solid and UN No. 3120 organic peroxide, type F, solid,
temperature controlled: code S4AN;
(g) Class 6.1:
UN No. 1613 hydrogen cyanide, aqueous solution and UN No. 3294 hydrogen cyanide
solution in alcohol: code L15DH;
(h) Class 7:
All substances: special tanks;
Minimum requirements for liquids: code L2.65CN; for solids: code S2.65AN
Notwithstanding the general requirements of this paragraph, tanks used for radioactive material
may also be used for the carriage of other goods provided the requirements of 5.1.3.2 are
complied with.
(i) Class 8:
UN No. 1052 hydrogen fluoride, anhydrous, UN No. 1744 bromine or bromine solution and
UN No. 1790 hydrofluoric acid, solution, with more than 85% hydrofluoric acid: code L21DH;
UN No. 1791 hypochlorite solution and UN No. 1908 chlorite solution: code L4BV.

 

Tanks intended for the carriage of liquid wastes complying with the requirements of Chapter 6.10 and
equipped with two closures in accordance with 6.10.3.2, shall be assigned to tank code L4AH. If the
tanks concerned are equipped for the alternate carriage of liquid and solid substances, they shall be
assigned to the combined codes L4AH+S4AH.

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.
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