Tanks with bottom discharge for UN 1942 and UN 3375 shall have at least two closures. One of these
closures may be the product mixing or discharge pump or auger.
Any piping after the first closure shall be of a fusible material (i.e. rubber hose) or have fusible
In order to avoid any loss of contents in the event of damage to the external pumps and discharge
fittings (pipes), the first closure and its seatings shall be protected against the danger of being
wrenched off by external stresses or shall be so designed as to withstand them. The filling and
discharge devices (including flanges or threaded plugs) and protective caps (if any) shall be capable
of being secured against any unintended opening.
Breather devices in accordance with 22.214.171.124.6 on tanks for UN 3375 may be substituted by "goose
necks". Such equipment shall be protected against the danger of being wrenched off by external
stresses or shall be so designed as to withstand them.
Special compartments for explosives
Compartments for packages of explosives containing detonators and/or detonator assemblies and
those containing substances or articles of compatibility group D shall be designed to provide effective
segregation such that there is no danger of transmission of detonation from the detonators and/or
detonator assemblies to the substances or articles of compatibility group D. Segregation shall be
achieved by the use of separate compartments or by placing one of the two types of explosive in a
special containment system. Either method of segregation shall be approved by the competent
authority. If the material used for the compartment is metal, the complete inside of the compartment
shall be covered with materials providing suitable fire resistance. The explosives compartments shall
be located where they are protected from impact and from damage on rough terrain and dangerous
interaction with other dangerous goods on board and from ignition sources on the vehicle e.g.
NOTE: Materials classified as class B-s3-d2 according to standard EN 13501-1:2007 + A1:2009 are
deemed to fulfil the fire resistance requirement.
Provisions concerning the conditions of carriage, loading, unloading and handling
The carriage of dangerous goods is subject to the mandatory use of a particular type of transport
equipment in accordance with the provisions of this Chapter and Chapter 7.2 for carriage in packages,
Chapter 7.3 for carriage in bulk and Chapter 7.4 for carriage in tanks. In addition, the provisions of
Chapter 7.5 concerning loading, unloading and handling shall be observed.
Columns (16), (17) and (18) of Table A of Chapter 3.2 show the particular provisions of this Part that
apply to specific dangerous goods.
In addition to the provisions of this Part, vehicles used for the carriage of dangerous goods shall, as
regards their design, construction and, if appropriate, their approval, conform to the relevant
requirements of Part 9.
Large containers, portable tanks, MEGCs and tank-containers which meet the definition of "container"
given in the CSC (1972), as amended, or in UIC leaflets 591 (status at 01.10.2007, 3rd edition), 592
(status at 01.10.2013, 2nd edition), 592-2 (status at 01.10.2004, 6th edition), 592-3 (status at
01.01.1998, 2nd edition) and 592-4 (status at 01.05.2007, 3rd edition) may not be used to carry
dangerous goods unless the large container or the frame of the portable tank, MEGC or tank-container
satisfies the provisions of the CSC or of UIC leaflets 591, 592 and 592-2 to 592-4.
A large container may be presented for carriage only if it is structurally serviceable.
"Structurally serviceable" means that the container is free from major defects in its structural
components, e.g. top and bottom side rails, doorsill and header, floor cross members, corner posts, and
corner fittings. "Major defects" are dents or bends in structural members greater than 19 mm in depth,
regardless of length; cracks or breaks in structural members; more than one splice or an improper
splice (e.g. a lapped splice) in top or bottom end rails or door headers or more than two splices in any
one top or bottom side rail or any splice in a door sill or corner post; door hinges and hardware that are
seized, twisted, broken, missing or otherwise inoperative; non-closing gaskets and seals; any distortion
of the overall configuration sufficient to prevent proper alignment of handling equipment, mounting
and securing on a chassis or vehicle.
In addition, deterioration in any component of the container, such as rusted metal in side walls or
disintegrated fibreglass is unacceptable, regardless of the material of construction. Normal wear,
including oxidization (rust), slight dents and scratches and other damage that do not affect
serviceability or weather-tightness are, however, acceptable.
Prior to loading the container shall also be checked to ensure that it is free from any residue of a
previous load and that the interior floor and walls are free from protrusions.
Large containers shall meet the requirements concerning the body of the vehicle laid down in this Part
and, if appropriate, those laid down in Part 9 for the load in question; the body of the vehicle need not
then satisfy those provisions.
However, large containers carried on vehicles whose platforms have insulation and heat-resistant
qualities which satisfy those requirements need not then satisfy the said requirements.
This provision also applies to small containers for the carriage of explosive substances and articles of
Subject to the provisions of the last part of the first sentence of 7.1.5, the fact that dangerous goods
are contained in one or more containers shall not affect the conditions to be met by the vehicle by
reason of the nature and quantities of the dangerous goods carried.
PROVISIONS CONCERNING CARRIAGE IN PACKAGES
Unless otherwise provided in 7.2.2 to 7.2.4, packages may be loaded:
(a) in closed vehicles or in closed containers; or
(b) in sheeted vehicles or in sheeted containers; or
(c) in open vehicles or in open containers.