TPT November 2010

C utting , S awing & P rofiling

Tunnel pipe optimises flow properties of plastic drainage pipes DRAINAGE pipes have to meet ever more severe requirements in the under-drainage of traffic structures and underground engineering. This is due to changing weather conditions with less frequent rainfalls yet considerably more water per rainfall. The collection, drain and seepage of surface water and soakage needs optimised drain systems able to cope with the floods. Tunnel-shaped drainage pipes have been used for nearly 35 years, to cope with huge amounts of water. These are mostly made from PVC since plastic provides high annular rigidity. The flat bottom of the pipe in contact with the soil makes for a better drainage than single

Insights into a mould block with the typical tunnel profile and a tunnel-shaped drainage pipe

walled pipes with fully circular corrugation. The German DIN standard, increasingly adopted in European countries, refers to this as Type C1 with profiled inner and outer surface and smooth flat flow bottom. To meet the increasing demand of the market for tunnel shaped drain pipes of plastic, Unicor GmbH has developed new tools for the UC 250 and UC 315 corrugators. A newly developed perforating process allows these machines to produce

tunnel pipes with an OD of DN 100 at a rate of up to 11 metres per minute. Another benefit of the UC 250 and UC 315 is that at constantly high speeds the sockets can also be produced inline. This dispenses completely with the need for a

separate production step. Unicor GmbH – Germany Email: sales@unicor.com Website: www.unicor.com

GUAZZONI waterjet laser services tel. 0331 962642 email: info@guazzoni.it

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N ovember 2010

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