Application and general requirements

Bulk containers and their service and structural equipment shall be designed and constructed to
withstand, without loss of contents, the internal pressure of the contents and the stresses of normal
handling and carriage.

Where a discharge valve is fitted, it shall be capable of being made secure in the closed position and
the whole discharge system shall be suitably protected from damage. Valves having lever closures
shall be able to be secured against unintended opening and the open or closed position shall be readily
apparent.

Code for designating types of bulk container

The following table indicates the codes to be used for designating types of bulk containers:

Types of bulk containers

Code

Sheeted bulk container

BK1

Closed bulk container

BK2

Flexible bulk container

BK3

 

In order to take account of progress in science and technology, the use of alternative arrangements
which offer at least equivalent safety as provided by the requirements of this chapter may be
considered by the competent authority.

Requirements for the design, construction, inspection and testing of containers conforming to the CSC used as BK1 or BK2 bulk containers

Design and construction requirements

The general design and construction requirements of this sub-section are deemed to be met if the bulk
container complies with the requirements of ISO 1496-4:1991 "Series 1 Freight containers-
Specification and testing – Part 4: Non pressurized containers for dry bulk" and the container is
siftproof.

Containers designed and tested in accordance with ISO 1496-1:1990 "Series 1 Freight containers-
Specification and testing - Part 1: General cargo containers for general purposes" shall be equipped
with operational equipment which is, including its connection to the container, designed to strengthen
the end walls and to improve the longitudinal restraint as necessary to comply with the test
requirements of ISO 1496-4:1991 as relevant.

Bulk containers shall be siftproof. Where a liner is used to make the container siftproof it shall be
made of a suitable material. The strength of material used for, and the construction of, the liner shall
be appropriate to the capacity of the container and its intended use. Joins and closures of the liner shall
withstand pressures and impacts liable to occur under normal conditions of handling and carriage. For
ventilated bulk containers any liner shall not impair the operation of ventilating devices.

The operational equipment of bulk containers designed to be emptied by tilting shall be capable of
withstanding the total filling mass in the tilted orientation.

Any movable roof or side or end wall or roof section shall be fitted with locking devices with securing
devices designed to show the locked state to an observer at ground level.

Service equipment

Filling and discharge devices shall be so constructed and arranged as to be protected against the risk
of being wrenched off or damaged during carriage and handling. The filling and discharge devices
shall be capable of being secured against unintended opening. The open and closed position and
direction of closure shall be clearly indicated.

Seals of openings shall be so arranged as to avoid any damage by the operation, filling and emptying
of the bulk container.
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