Page 4 of the general approval no. Z-65.26-304 issued by the Building Inspection Authorities on June 26, 2001
2.3
Certificate of conformity
2.3.1 General
Conformity of the leak detector with the provisions of the present general approval must be
confirmed by the manufacturer’s declaration of conformity, issued on the basis of in-house
production inspection and testing and initial testing of the leak detector by an authorised
technical control board.
2.3.2 In-house production inspection
The manufacturer shall implement and carry out in-house production inspection. In the course of
such in-house inspection, every leak detector or its components shall be checked. By means of
such individual checks the manufacturer shall ensure that materials, dimensions, tolerances and
design correspond to the approved sample, and that the leak detector is reliable.
The results of in-house inspection shall be recorded and evaluated. The records should contain
the following details as a minimum:
- designation of the leak detector
- type of in-house inspection or testing
- date of manufacture, inspection and testing of the leak detector
- results of inspection and testing
- signature of the person responsible for in-house inspection and testing.
The records shall be kept on file for at least 5 years. Upon request , they shall be presented to
the German Institute for Constructional Engineering and the Building Inspection Authorities.
In the event of inadequate test results, the manufacturer shall immediately take appropriate
remedial action. Leak detectors that do not meet the requirements shall be separated so as to
avoid confusion with satisfactory units. After repair - if possible and necessary from a technical
point of view - the leak detector shall be re-tested.
2.3.3 Initial testing of the leak detector by an authorised technical control board.
Initial testing shall comprise the functional checks as defined in the approval principles for leak
detectors on tanks. If the general approval of the Building Inspection Authorities includes
checking of samples from current production, initial testing as described herein is not necessary.
3
Conditions relating to the design
3.1
Care must be taken that the subject of approval and the interstitial space are sufficiently
resistant to the liquids to be stored and that the liquids hazardous to water do not react with the
inert gas.
3.2
The necessary monitoring pressures for the leak detectors type "DLR-2" will be set individually
by the manufacturer depending on the permissible operating overpressure of the double-wall
pipework.
4.
Conditions relating to the construction of leak detectors
4.1
(1) Leak detectors should be installed in accordance with paragraph 5 of the technical
specification
1
and commissioned in accordance with paragraph 6 of this technical specification.
Installation, maintenance, repair and cleaning of the leak detectors shall only be carried out by
specialist companies as per § 19 I of the Water Resources Law.
(2) Carrying out of the activities listed in (1) above by specialist companies is not required if
such work is exempted from these rules, or if such work is carried out by in-house experts from
the manufacturer of the subject of approval. This does not affect labour-protection regulations.
4.2
The leak detector must be installed in a room closed on all sides, it must not be installed and
operated in a potentially explosive area. If it is not operated in a dry room it must be installed in
a suitable switch box or switch cabinet which complies with at least protection type IP 54.
