inform 11.2011 e (pdf file 2 MB) - Duktus

PAGE 10 | INFORM NO. 3 / 2011
first trenchless project in hungary
DUKTUS PIPES SUCCESSfULLy CELEBRATE ThEIR fIRST DAy IN A NEW JOB IN BUDAPEST
The project attracted plenty of attention and was visited by many
potential customers
The trenchless laying technique and its star players,
the Duktus pipes that are ideally suited to
this technique, are becoming increasingly important
outside the central European area. In a relining
project in Budapest, ductile iron pipes have
been used for trenchless laying for the first time
in Hungary and have shown what outstanding
properties they have.
Hungary‘s capital has a population of around
two million and is a perfect example of a place
where the use of no-dig techniques are beneficial
in areas where traffic is sensitive to disruptions.
With chain hoists, it is very easy to install even DN 600 pipes in a very cramped space
Because of the high volume of traffic in this city
on the Danube, there are frequent traffic jams.
More than 600,000 cars use the road network,
whose characteristic features are ring roads and
radial roads.
Between wide traffic arteries there are a large
number of narrow roads which are often only
one-way. The majority of Hungary’s major roads
run through Budapest, so there is not only the
town’s own traffic to be dealt with but also the
through traffic. Because of these factors, pipeline
renovation operations carried out in open trenches
put a severe strain on the traffic situation.
Back in the summer of 2010, Pureco GmbH,
Duktus’s representative in Hungary, gave a presentation
to tell professionals about the suitability
of ductile iron pipes for trenchless laying techniques,
which are both environmentally and economically
superior (inform reported on this in the
2/2010 issue).
“With our informative presentation we were pushing
at an open door”, remembers Pureco sales
manager István Öllös, “the situation is very sensitive
due to the volume of traffic and the large
number of historic buildings in Budapest, therefore,
trenchless laying is the method of choice
here to replace pipelines quickly, easily and cost
efficiently.”
The pipeline network operated by Budapest Waterworks,
a water supply company founded in
1886, is now showing its age and needs to be
renovated in many places. In the spring of 2011,
an old steel pipeline needed to be replaced on
one of the most heavily used roads. “Laying in
the conventional way would have caused the
traffic to collapse completely”, says Duktus sales
manager Roland Kröpfl. “That was why – on the
basis of the last year’s presentation – we were
able to win over the decision makers to the relining
technique using Duktus pipes.”
The pipes used were ZMU pipes of DN 600
nominal size with BLS® joints. Two small installation
pits each measuring 8 x 2 metres were
needed for the laying
of the 200 metre
long run, which was
done by the Hungarian
installing
company Hajdú és
Társai Kft. Duktus
supplied the traction head on loan. The traction
machine was bought by Budapest Waterworks
and made available to the installing company. A
very positive view was taken of the easy way in
which the BLS® joint could be handled and of
the ruggedness of the ZMU coating.
“Sales service at Duktus doesn’t come to an end
simply when the project is completed. The right
basic training for the installing workers and the
ongoing support given on site are our plus points
for the future”, says István Öllös
This first Hungarian relining project, using Duktus
pipes, was visited by large numbers of potential
customers while it was being carried out. Roland
Kröpfl sums things up: “The project was a clear
success for Budapest Waterworks and for Duktus.
A further piece of pipeline renovation is in
prospect next year using the same technique.”
Trenchless laying by the relining technique has been carried out for the first time in Hungary’s capital Budapest using Duktus pipes
Fitting the Duktus traction head into the steel pipeline