These bulk containers shall be approved by the competent authority and the approval shall include the
code for designating types of bulk containers in accordance with and the requirements for
inspection and testing as appropriate.

Where it is necessary to use a liner in order to retain the dangerous goods it shall meet the provisions

Requirements for the design, construction, inspection and testing of BK3 flexible bulk containers

Design and construction requirements

Flexible bulk containers shall be sift-proof.

Flexible bulk containers shall be completely closed to prevent the release of contents.

Flexible bulk containers shall be waterproof.

Parts of the flexible bulk container which are in direct contact with dangerous goods:
(a) shall not be affected or significantly weakened by those dangerous goods;
(b) shall not cause a dangerous effect, e.g. catalysing a reaction or reacting with the dangerous
goods; and
(c) shall not allow permeation of the dangerous goods that could constitute a danger under normal
conditions of carriage.

Service equipment and handling devices

Filling and discharge devices shall be so constructed as to be protected against damage during carriage
and handling. The filling and discharge devices shall be secured against unintended opening.

Slings of the flexible bulk container, if fitted, shall withstand pressure and dynamic forces, which can
appear in normal conditions of handling and carriage.

The handling devices shall be strong enough to withstand repeated use.

Inspection and testing

The design type of each flexible bulk container shall be tested as provided for in 6.11.5 in accordance
with procedures established by the competent authority allowing the allocation of the mark and shall
be approved by this competent authority.

Tests shall also be repeated after each modification of the design type, which alters the
design, material or manner of construction of a flexible bulk container.
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