Inspecting pressure sewer pipes: Potential, requirements and results
Pressure sewer lines are subject to the legal provisions concerning inspection and condition survey, as defined for example in German federal states’ regulations for self-inspection and self-monitoring. Sewer network operators frequently find themselves facing special challenges in implementing the required inspection work. High points and low points with no valves complicate draining and venting. There is a danger of blockages of the gravity system if pump operation is interrupted, with the potential for back-ups and flooding.
IKT research project
The IKT research project “Inspection and condition-surveying of pressure sewer lines and culverts”, which was conducted by IKT jointly with more than twenty sewer network operators, found that life-cycle observation of pressure sewers is becoming ever more important. The main results provide sewer network operators and technology suppliers with better understanding of the requirements for inspection technologies, the performance of water tightness tests and the selection of rehabilitation methods for pressure sewer pipes. A qualitative risk model for prioritizing pipe-specific inspection, which is already being used by operators, is also discussed.
Research Project: Pressure Sewer Lines
Read the whole article with key research results (PDF, 7 pages)
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