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Projects<br />
14<br />
Trenchless pipe laying<br />
in Salzburg and Wels<br />
Austria is another country where the advantages of trenchless<br />
pipe laying are being discovered and applied to an ever<br />
greater degree. In inner city areas this method of laying is particularly<br />
advantageous, because no cost-intensive digging is<br />
required and interference with traffic can be kept to a minimum.<br />
Vienna played a pioneering role with a number of projects<br />
and other towns and cities are now following its lead. In Salzburg,<br />
an old 00 metre long pipe of grey cast iron has been<br />
replaced by ductile cast iron pipes of DN 100 nominal size<br />
with a cement mortar coating. The company managing the<br />
project decided in favour of the burst lining technique and<br />
carried out the installation work from October to December<br />
of 008.<br />
In Wels in Upper Austria, preference was given to the directional<br />
drilling technique due to the local soil conditions. Here<br />
165 metres of ZMU pipe of 80 nominal size were pulled in.<br />
The company doing the work, Rohr- und Schweißtechnik<br />
GmbH of Marchtrenk, was extremely satisfied with the user<br />
friendly nature of the ductile cast iron pipes when being laid<br />
and with their suitability for trenchless installation.<br />
Coating of fittings at TRM now has GSK<br />
certification<br />
After the new powder coating system went into operation in the<br />
third quarter of 006 and all the teething problems were overcome,<br />
we can now proudly say that a maximum level of quality<br />
with an extremely high standard of repeatability is being achieved<br />
with this fully automatic system. TRM initially attached great importance<br />
to production using the criteria laid down in EN 14901.<br />
Now the company wants to go further and is setting itself the<br />
challenge of coating its range of fittings to “Gütegemeinschaft<br />
Schwerer Korrosionsschutz” (GSK) (Quality Association for<br />
Heavy Duty Corrosion Protection) specifications, which are far<br />
higher than the requirements of EN14901. The Quality Association’s<br />
certificate is the customer’s guarantee of a coating of impeccable<br />
quality and hence of a future-proof solution for supply<br />
networks. As well as the additional in-house monitoring required,<br />
the greatest challenge to TRM, and one that it has met with great<br />
success, was maintaining the minimum coating thickness of 50<br />
µm right across the highly diversified range of fittings. Another<br />
highlight of the system is the inkjet labelling, which ensures that<br />
products are easily traceable.<br />
Quality awareness among European<br />
water suppliers is unusually high<br />
both in respect of the quality of their<br />
water and the condition of their networks<br />
and technical facilities. One<br />
of the most important quality criteria<br />
in this field is reliable protection<br />
against corrosion. For engineer Walter<br />
Kling of Vienna Waterworks,<br />
heavy duty corrosion protection is essential when it comes to the<br />
quality of the technical facilities. With the certification to the GSK<br />
specifications, TRM is demonstrating its own claim to high standards<br />
of quality and awareness of its responsibilities.
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