BA 9137 en 12/2015
4.4.2.2 Combined storage / packaging
If the type of packaging and/or storage is changed within the durability period as HD
1
, which is applicable
to the existing preservation and the present type of packaging and/or storage, a new
HD
2äq
has to be
determined as the equivalent remaining durability period applicable as of the date of the change. For this
purpose, the following formula has to be used:
HD
2äq
+
(1
*
LD
1
HD
1
)
HD
2
LD
1
= Storage period for the existing preservation
HD
1
= Maximum durability period of the existing preservation
according to table 3 in item 4.4.2.1
HD
2
= Maximum durability period after the change in the type of storage and/or packaging
according to table 3 in item 4.4.2.1
HD
2äq
= Maximum remaining durability period after the change in the type of storage and/or
packaging
If several packaging and/or storage types are combined the following formula must be applied as from
the second change in packaging and/or storage types (
equivalent
remaining durability period > HD
2 äq
)
to determine the
equivalent
remaining durability period applying to the preservation:
HD
n
*
äq
+
(HD
n
*
1äq
*
LD
n
*
1
)
(
HD
n
HD
n
*
1
)
HD
n-1
äq
=
Calculated durability period with the previous storage conditions
LD
n-1
=
Actual duration of storage with the previous storage conditions
HD
n
=
Maximum durability period with the present storage conditions
specified in table 2 in item 4.4.2.1
HD
n-1
=
Maximum durability period with the previous storage conditions
specified in table 2 in item 4.4.2.1
HD
n-
äq
=
Remaining durability period after change in the packaging and/or storage types