SGB DLR-GS, Documentation, Page: 12 / 40

PRESSURE LEAK DETECTOR DLR-GS ..
06/08/2020
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3.4 Field of Application
3.4.1 Interstitial space requirements

Proof of pressure resistance of the interstitial space (see section
3.3, column "p
TEST
" minimum test pressure of the interstitial space)

Proof of suitability of the interstitial space (for Germany: proof of
usability from construction authority).

Sufficient passage in the interstitial space for the leak detection
medium (air/nitrogen)

Tightness of the interstitial space according to this documentation.

The number of interstitial spaces to be monitored depends on the
total interstitial space volume. According to EN 13160, 10 m 3 may
not be exceeded. To be able to test the tightness of the interstitial
space, it is recommended not to exceed 4 m
3 .
The pipeline length (per duct) to be monitored should not exceed
2500 m and must correspond with the specifications for the pipe
permit.
3.4.2 Pipes

Double-walled pipes made of metal or plastic, in factory or on-site
construction.
For Germany: Additional requirements may result from the respec-
tive permits.

ONLY for applications without temperature variations of more than

10°C (e.g. double-walled pipes installed underground or indoors
– no hot media).
3.4.3 Fittings

Double-walled fittings made of metal or plastic in factory or on-site
construction.
For Germany: with proof of usability from construction authority,
unless it is part of the pipe permit.

ONLY for applications without temperature variations of more than

10°C (e.g. double-walled pipes installed underground or indoors
– no hot media).
3.4.4 Conveyed product

Liquids hazardous to water, even with a flash point of ≤ 60°C (for
Germany ≤ 55°C according to TRGS 509 and TRGS 751). Chapter
3.4.5 is to be observed.

The conveyed product may not react with the leak detection me-
dium.
Technical Data