DWA rules and guidelines governing the condition assessment of sewers

Preventing losses to the national economy – precision measurements in sewers

CCTV inspections of pipelines are carried out to detect defects in pipes, including cracks, in order to ensure compliance of sewers with relevant specifications. Any cracks larger than so-called (up to 0.3 mm wide) hairline cracks usually constitute a defect giving rise to a complaint and subsequent rework to be done by the civil contractor or pipe manufacturer.

The Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e. V. (DWA; German Association for Water, Wastewater and Waste) based in Hennef in the German State of North Rhine-Westphalia is the standard-setting organization with...

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