Raw Water Pipeline and Discharge from Pécs to Szekszár

Project ID: [00008585]
Application:Sewer, Potable Water
Installation:Open Trench
Total Length [m]:658
Nominal Diameter DN [mm]700 | 1200
Nominal Pressure PN [bar]1 | 6
Nominal Stiffness SN [N/m2]10000

In 1970 Pécs established a concrete sewer main running through the water meadow Tüskésrét. A reconstruction plan was set up in 2000 to replace the old 2.7 km collector which had corroded considerably over the years. The reason for this was the high rate of iron sulfate in the groundwater due to the disposal of waste from a brown coal fired thermal power plant. Ash and slug had been deponated in the area since 1958 burdening the environment considerably and rendering the groundwater into an aggressive medium which gradually destroyed the old line. This was the main reason why the Pécs Water Company Ltd. chose the highly corrosion resistant HOBAS CC-GRP SewerLine System. It was furthermore important to find a material that would withstand the heavy truck traffic loads from the industrial road under which the line was installed. In 2001 and 2006 about 1.5 km of HOBAS SewerLine Pipe were laid in the prior reconstruction stages on the upper track of the main collector. Fortunately the autumn was dry and the groundwater level was far below the level of around 3 m that was assumed in a preliminary study.