National Technical Approval
No. Z-40.21-510
(6) If the tanks are exposed to significant wind load, structural tests shall demonstrate their ability
to absorb and transfer this load. A tank anchorage point (e.g. in the bearing surface or by means of
retaining straps) must not adversely affect the tanks' stability. Tank anchorage points in collecting
devices or drill holes in collecting devices covered by this National Technical Approval are
prohibited.
4.3.2
Pipelines
(1)Ventilation lines shall conform to TRbF 20
dimensioned and it will not be possible to seal them off. They and their pipe connections shall be
designed such that they remain tight at a gauge pressure of 0.3 bar. Outlet holes shall be protected
against the ingress of rainwater.
(2)
Ventilation lines or devices shall not have their outlet in closed spaces. This does not apply to
individually installed tanks with a volume of up to 1000 l for storing liquids as per section 1 (6),
items 1 to 4.
(3) Several tanks may be connected to the same ventilation line only if the liquids they store and/or
their vapours do not combine to produce dangerous compounds.
(4) When connecting pipelines to tank nozzles, care shall be taken not to exert any force and to
ensure that the tanks are not subjected to any additional, unforeseen external loads.
4.3.3
Installation conditions
For storage of liquids as per section 1 (6), items 1 to 4, a passable distance of at least 40 cm shall
be left on at least one side of the tanks. On other sides of tanks, there shall be a minimum distance
of 5 cm.
4.4
Documentation and confirmation of conformity
The company performing this task shall produce confirmation of conformity that confirms correct
erection, installation and assembly in conformity with the manufacturer's installation instructions
and the provisions of the National Technical Approval, under consideration of technical approval of
the suitability of equipment and accessories. This confirmation shall be submitted to the operator in
each individual case, who will store it in the building file.
5
Provisions for use, maintenance, servicing and inspection
5.1
Use
5.1.1
Stored liquids
(1)The tanks may be used for the storage of liquids hazardous to water as per section 1 (6), with
the limitations mentioned therein.
(2) The storage of contaminated liquids is not permitted if this contamination would change the
behaviour of the material.
5.1.2
Useful tank volume
The permitted fill level of the tanks shall not exceed 95 %, unless a different fill level is stipulated by
12
TRbF 20
, section 9.3.2.2. The overfill protection device shall be set up accordingly.
Z82848.13
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, section 9.1.2. They shall be adequately
GB
1.40.21-14/13
37