Leakproofness test

Applicability

For those types of IBC used for liquids or for solids filled or discharged under pressure, as a design
type test and periodic test.

Preparation of the IBC for test

The test shall be carried out before the fitting of any thermal insulation equipment. Vented closures
shall either be replaced by similar non-vented closures or the vent shall be sealed.

Method of testing and pressure to be applied

The test shall be carried out for a period of at least 10 minutes using air at a gauge pressure of not less
than 20 kPa (0.2 bar). The air tightness of the IBC shall be determined by a suitable method such as
by air-pressure differential test or by immersing the IBC in water or, for metal IBCs, by coating the
seams and joints with a soap solution. In the case of immersing a correction factor shall be applied for
the hydrostatic pressure.

Criterion for passing the test

No leakage of air.

Internal pressure (hydraulic) test

Applicability

For those types of IBCs used for liquids or for solids filled or discharged under pressure, as a design
type test.

Preparation of the IBC for test

The test shall be carried out before the fitting of any thermal insulation equipment. Pressure-relief
devices shall be removed and their apertures plugged, or shall be rendered inoperative.

Method of testing

The test shall be carried out for a period of at least 10 minutes applying a hydraulic pressure not less
than that indicated in 6.5.6.8.4. The IBCs shall not be mechanically restrained during the test.

Pressures to be applied

Metal IBCs:
(a) For IBCs of types 21A, 21B and 21N, for packing group I solids, a 250 kPa (2.5 bar) gauge
pressure;
(b) For IBCs of types 21A, 21B, 21N, 31A, 31B and 31N, for packing groups II or III substances,
a 200 kPa (2 bar) gauge pressure;
(c) In addition, for IBCs of types 31A, 31B and 31N, a 65kPa (0.65 bar) gauge pressure. This test
shall be performed before the 200 kPa (2 bar) test.

Rigid plastics and composite IBCs:
(a) For IBCs of types 21H1, 2lH2, 21HZ1 and 21HZ2: 75 kPa (0.75 bar) (gauge);
(b) For IBCs of types 31H1, 31H2, 31HZ1 and 31HZ2: whichever is the greater of two values, the
first as determined by one of the following methods:
(i) the total gauge pressure measured in the IBC (i.e. the vapour pressure of the filling
substance and the partial pressure of the air or other inert gases, minus 100 kPa) at
55 °C multiplied by a safety factor of 1.5; this total gauge pressure shall be determined
on the basis of a maximum degree of filling in accordance with 4.1.1.4 and a filling
temperature of 15 °C;
(ii) 1.75 times the vapour pressure at 50 °C of the substance to be carried minus 100 kPa,
but with a minimum test pressure of 100 kPa;
(iii) 1.5 times the vapour pressure at 55 °C of the substance to be carried minus 100 kPa, but
with a minimum test pressure of 100 kPa;
and the second as determined by the following method:
(iv) twice the static pressure of the substance to be carried, with a minimum of twice the
static pressure of water;

Criteria for passing the test(s):
(a) For IBCs of types 21A, 21B, 21N, 31A, 31B and 31N, when subjected to the test pressure
specified in 6.5.6.8.4.1 (a) or (b): no leakage;
(b) For IBCs of types 31A, 31B and 31N, when subjected to the test pressure specified
in 6.5.6.8.4.1 (c): no permanent deformation which renders the IBC unsafe for carriage and no
leakage;
(c) For rigid plastics and composite IBCs: no permanent deformation which would render the IBC
unsafe for carriage and no leakage.

 

Drop test

Applicability

For all types of IBCs, as a design type test.

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