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General technical approval/
General design certification
No. Z-40.21-589 of 19 November 2021
Rotational-moulded container combination made from
polyethylene (PE) Type: CUBE Tank 980 l
Permissible fill level
(1)
When determining the permissible fill level, the cubic expansion coefficient α of
the liquids with which the container is to be filled must be taken into account, together with
the possible increase in temperature of the liquid above the filling temperature during storage
and the associated increase in the volume of the liquid.
(2)
When storing water-polluting liquids that do not present any additional hazardous
properties, the permissible fill level at the filling temperature is to be determined as follows:
Fill level =
For α ≤ 1.5 10
/K, a fill level of 95% can be viewed as sufficient. The mean cubic expansion
-3
d
− d
coefficient α can be established as follows:
�������� =
15
35 ∙ d
d
= density of the liquid at +15°C
15
d
= density of the liquid at +50°C
50
(3)
For liquids for which the filling temperature is more than 35 K below the maximum
permitted operating temperature, the resulting expansion must be taken into account when
determining the fill level.
(4)
Where containers are used to store water-polluting liquids that are classified as toxic
or corrosive, a fill level that is at least 3% lower than that determined on the basis of Para-
graph (2) must be maintained.
Z105800.21
100
1+ α∙35
in % of the tank capacity
50
50
Annex 5
GB
1.40.21-59/20
53
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