Use of salvage packagings and large salvage packagings
Damaged, defective, leaking or non-conforming packages, or dangerous goods that have spilled or
leaked may be carried in salvage packagings mentioned in 188.8.131.52.11 and in large salvage packagings
mentioned in 184.108.40.206.9. This does not prevent the use of a larger size packaging, an IBC of type 11A
or a large packaging of appropriate type and performance level and under the conditions of 220.127.116.11.2
Appropriate measures shall be taken to prevent excessive movement of the damaged or leaking
packages within a salvage packaging or large salvage packaging. When the salvage packaging or large
salvage packaging contains liquids, sufficient inert absorbent material shall be added to eliminate the
presence of free liquid.
Appropriate measures shall be taken to ensure that there is no dangerous build up of pressure.
Use of salvage pressure receptacles
In the case of damaged, defective, leaking or non-conforming pressure receptacles, salvage pressure
receptacles according to 18.104.22.168 may be used.
NOTE: A salvage pressure receptacle may be used as an overpack in accordance with 5.1.2. When
used as an overpack, marks shall be in accordance with 22.214.171.124 instead of 126.96.36.199.
Pressure receptacles shall be placed in salvage pressure receptacles of suitable size. The maximum
size of the placed pressure receptacle is limited to a water capacity of 1 000 litres. More than one
pressure receptacle may be placed in the same salvage pressure receptacle only if the contents are
known and do not react dangerously with each other (see 188.8.131.52). In this case the total sum of water
capacities of the placed pressure receptacles shall not exceed 1 000 litres. Appropriate measures shall
be taken to prevent movement of the pressure receptacles within the salvage pressure receptacle e.g.
by partitioning, securing or cushioning.
A pressure receptacle may only be placed in a salvage pressure receptacle if:
(a) The salvage pressure receptacle is in accordance with 184.108.40.206 and a copy of the approval
certificate is available;
(b) Parts of the salvage pressure receptacle which are, or are likely to be in direct contact with the
dangerous goods will not be affected or weakened by those dangerous goods and will not cause
a dangerous effect (e.g. catalyzing reaction or reacting with the dangerous goods); and
(c) The contents of the contained pressure receptacle(s) are limited in pressure and volume so that
if totally discharged into the salvage pressure receptacle, the pressure in the salvage pressure
receptacle at 65 °C will not exceed the test pressure of the salvage pressure receptacle (for
gases, see packing instruction in P200 (3) in 220.127.116.11). The reduction of the useable water
capacity of the salvage pressure receptacle, e.g. by any contained equipment and cushioning,
shall be taken into account.
The proper shipping name, the UN number preceded by the letters "UN" and label(s) as required for
packages in Chapter 5.2 applicable to the dangerous goods inside the contained pressure receptacle(s)
shall be applied to the salvage pressure receptacle for carriage.
Salvage pressure receptacles shall be cleaned, purged and visually inspected internally and externally
after each use. They shall be periodically inspected and tested in accordance with 18.104.22.168 at least once
every five years.
Verification of the chemical compatibility of plastics packagings, including IBCs, by assimilation of filling substances to standard liquids
For polyethylene packagings as specified in 22.214.171.124.6, and for polyethylene IBCs as specified in
126.96.36.199.5, the chemical compatibility with filling substances may be verified by assimilation to
standard liquids following the procedures, as set out in 188.8.131.52.3 to 184.108.40.206.5 and using the list in
table 220.127.116.11.6, provided that the particular design types have been tested with these standard liquids
in accordance with 6.1.5 or 6.5.6, taking into account 6.1.6 and that the conditions in 18.104.22.168.2 are
met. When assimilation in accordance with this sub-section is not possible, the chemical compatibility
needs to be verified by design type testing in accordance with 22.214.171.124.5 or by laboratory tests in
accordance with 126.96.36.199.7 for packagings, and in accordance with 188.8.131.52.3 or 184.108.40.206.6 for IBCs,
NOTE: Irrespective of the provisions of this sub-section, the use of packagings, including IBCs,
for a specific filling substance is subject to the limitations of Table A of Chapter 3.2, and the packing
instructions in Chapter 4.1.
The relative densities of the filling substances shall not exceed that used to determine the height for
the drop test performed successfully according to 220.127.116.11.5 or 18.104.22.168.4 and the mass for the stacking
test performed successfully according to 22.214.171.124 or where necessary according to 126.96.36.199 with the
assimilated standard liquid(s). The vapour pressures of the filling substances at 50 °C or 55 °C shall
not exceed that used to determine the pressure for the internal pressure (hydraulic) test performed
successfully according to 188.8.131.52.4 or 184.108.40.206.4.2 with the assimilated standard liquid(s). In case that
filling substances are assimilated to a combination of standard liquids, the corresponding values of the
filling substances shall not exceed the minimum values derived from the applied drop heights,
stacking masses and internal test pressures.
Example: UN 1736 Benzoyl chloride is assimilated to the combination of standard liquids "Mixture of
hydrocarbons and wetting solution". It has a vapour pressure of 0.34 kPa at 50 °C and a relative
density of approximately 1.2. Design type tests for plastics drums and jerricans were frequently
performed at minimum required test levels. In practice this means that the stacking test is commonly
performed with stacking loads considering only a relative density of 1.0 for the "Mixture of
hydrocarbons" and a relative density of 1.2 for the "Wetting solution" (see definition of standard
liquids in 6.1.6). As a consequence chemical compatibility of such tested design types would not be
verified for benzoyl chloride by reason of the inadequate test level of the design type with the standard
liquid "mixture of hydrocarbons". (Due to the fact that in the majority of cases the applied internal
hydraulic test pressure is not less than 100 kPa, the vapour pressure of benzoyl chloride would be
covered by such test level according to 220.127.116.11).
All components of a filling substance, which may be a solution, mixture or preparation, such as
wetting agents in detergents and disinfectants, irrespective whether dangerous or non-dangerous, shall
be included in the assimilation procedure.
The following steps shall be taken to assign filling substances to listed substances or groups of
substances in table 18.104.22.168.6 (see also scheme in Figure 22.214.171.124.1):
(a) Classify the filling substance in accordance with the procedures and criteria of Part 2
(determination of the UN number and packing group);
(b) If it is included there, go to the UN number in column (1) of table 126.96.36.199.6;
(c) Select the line that corresponds in terms of packing group, concentration, flashpoint, the
presence of non-dangerous components etc. by means of the information given in columns
(2a), (2b) and (4), if there is more than one entry for this UN number.
If this is not possible, the chemical compatibility shall be verified in accordance with 188.8.131.52.5
or 184.108.40.206.7 for packagings, and in accordance with 220.127.116.11.3 or 18.104.22.168.6 for IBCs (however, in
the case of aqueous solutions, see 22.214.171.124.4);
(d) If the UN number and packing group of the filling substance determined in accordance with (a)
is not included in the assimilation list, the chemical compatibility shall be proved in
accordance with 126.96.36.199.5 or 188.8.131.52.7 for packagings, and in accordance with 184.108.40.206.3 or
220.127.116.11.6 for IBCs;
(e) Apply the "Rule for collective entries", as described in 18.104.22.168.5, if this is indicated in column
(5) of the selected line;
(f) The chemical compatibility of the filling substance may be regarded as verified taking into
account 22.214.171.124.1 and 126.96.36.199.2, if a standard liquid or a combination of standard liquids is
assimilated in column (5) and the design type is approved for that/those standard liquid(s).
Figure 188.8.131.52.1: Scheme for the assimilation of filling substances to standard liquids
Aqueous solutions of substances and groups of substances assimilated to specific standard liquid(s) in
accordance with 184.108.40.206.3 may also be assimilated to that (those) standard liquid(s) provided the
following conditions are met:
(a) the aqueous solution can be assigned to the same UN number as the listed substance in
accordance with the criteria of 220.127.116.11, and
(b) the aqueous solution is not specifically mentioned by name otherwise in the assimilation list in
(c) no chemical reaction is taking place between the dangerous substance and the solvent water.
Example: Aqueous solutions of UN 1120 tert-Butanol:
- Pure tert-Butanol itself is assigned to the standard liquid "acetic acid" in the assimilation list.
- Aqueous solutions of tert-Butanol can be classified under the entry UN 1120 BUTANOLS in
accordance with 18.104.22.168, because the aqueous solution of tert-Butanol does not differ from the
entries of the pure substances relating to the class, the packing group(s) and the physical state.
Furthermore, the entry "1120 BUTANOLS" is not explicitly limited to the pure substances, and
aqueous solutions of these substances are not specifically mentioned by name otherwise in
Table A of chapter 3.2 as well as in the assimilation list.
- UN 1120 BUTANOLS do not react with water under normal conditions of carriage.
As a consequence, aqueous solutions of UN 1120 tert-Butanol may be assigned to the standard liquid