PRESSURE LEAK DETECTOR
DLR-G ..
24/10/2018
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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
PRÜF
" 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.
Operating mode C for double-walled pipes installed above or un-
derground.
Operating mode I only for applications without temperature varia-
tions of more than
10°C (e.g. double-walled pipes installed un-
derground 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.
Operating mode C for double-walled pipes installed above or un-
derground.
Operating mode I only for applications without temperature varia-
tions of more than
10°C (e.g. double-walled pipes installed un-
derground 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 acc. to TRGS 509 and TRGS 751). Restrictions
result, according to 3.4.5, from the material to be conveyed and
the leak detection medium used.
The conveyed product may not react with the leak detection medi-
um.
Technical Data
