Mixed water pipeline with dry weather channel
The town „Rasseln“ wich is a part of the city Mönchengladbach in Germany wasn’t connected to the sewage network until 2011. The used water had simply been let seep away, which is not permitted.
The NVV (Niederrheinische Versorgung und Verkehr AG), which is responsible for the proper disposal of any sewage, planned the construction of a large mixed water channel. The project consisted of building a large storage channel and pipelines to connect the town of “Rasseln” to the sewer system of the city of Mönchengladbach. In Rasseln sewage water runs into a pumping station and via two pressure pipes into the sewer systems of Mönchengladbach.
To solve this challenge two options were possible:
1. rectangular concrete channel with lining and a dry weather channel
2. Retaining channel of PE consisting of PE- buildings and profiled pipes DN 2000 with dry weather channel
Manholes are, beside pipes and fittings, an essential element of underground pipe-systems. They are used for maintenance and inspection of sewers, sampling point or are fixed part of process technology / fluid engineering. The fabrication of thermoplastic manholes can be done in different ways of production. While, in smaller dimensions (DN ≤ 800), blow molded, injection molded or rotation molded manholes are in the market, manholes made of profiled pipes (helical extruded pipes) and semi-finished products will be used in medium sized and large diameters (DN800 to DN4000). Especially, the materials Polyethylene (PE) and Polypropylene (PP) are popular, due to their very long service life (> 100 years), good flexibility, high impact resistance, high strength, safety and low weight.
