Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus
Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus
Buderus Manual on Trenchless Installation of Ductile Cast ... - Duktus
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3.4 Requirements for the site<br />
Requirements for the new pipe<br />
It goes without saying that when trenchless installati<strong>on</strong> techniques are being, exacting<br />
demands are made not <strong>on</strong>ly <strong>on</strong> the pipes and the accessories but also <strong>on</strong> the machinery<br />
used by the companies doing the work and <strong>on</strong> their qualified specialist pers<strong>on</strong>nel.<br />
There has to be sophisticated quality assurance system in this case to ensure a high<br />
standard <strong>of</strong> safety and quality for the new pipeline. The company provides evidence<br />
that it is suitably qualified by having the appropriate certificati<strong>on</strong> under DVGW Arbeitsblatt<br />
GW 301 [3. ] in supplementary group GN 1. This ensures that the pipeline which<br />
is installed by trenchless means will meet the demands that are made <strong>on</strong> it not <strong>on</strong>ly<br />
from the point <strong>of</strong> view <strong>of</strong> cost <strong>of</strong> installati<strong>on</strong> but also in the l<strong>on</strong>g term, even bey<strong>on</strong>d the<br />
full operating life that is demanded. For a deposit, <str<strong>on</strong>g>Buderus</str<strong>on</strong>g> Giesserei Wetzlar GmbH<br />
will supply tracti<strong>on</strong> heads, which can also be used for other trenchless installati<strong>on</strong><br />
techniques, <strong>on</strong> hire. There are now a wide variety <strong>of</strong> variant tracti<strong>on</strong> heads which can<br />
be obtained through machinery suppliers.<br />
Fig. 3.17 ZMU-PLUS sockets and an inserting end<br />
3