Evides Industriewater replacing over 18 kilometres of pipeline network for deminwater

The pipelines of the deminet in Rotterdam Harbour date from the 60’s and 70’s. Evides Industriewater started with the replacement programme in 2015. Evides performs regular assessments to determine if all pipelines still meet the necessary requirements. The assessment of the deminwater network showed that some PVC pipelines and some intermediate fibreglass reinforced pipe segments have to be replaced earlier than scheduled. The replacement programme is planned until 2020.

Continuity of supply
As a result of the assessment an optimisation programme has been carried out to assure continuity of supply for our customers from the deminet. During the replacement work, agreements are made with customers to minimise the inconvenience to them. If needed additional measures are taken to guarantee delivery of deminwater e.g. using a mobile deminwater unit or constructing temporary pipelines.

Other cables and pipes
The new PE (polyethylene)-pipelines have a larger outside diameter because whilst the inside diameter remains the same, the walls are thicker. This larger diameter means there is less room between the deminet pipes and the other cables and pipes which share the same underground space. We have discussed and agreed all this with the other cable and pipeline companies. Vacuum trucks are being used for the excavation because mechanical digging is not allowed within a radius of half a meter from existing pipelines. The work complies with the ‘Handboek Leidingen Rotterdam’, the regulations for pipelines in Rotterdam.

The cables and pipes are located beneath a grass strip which is regulated by an ecological protocol. In the nesting and flowering season (from March to August) steps are taken to minimise the impact under supervision of an ecologist. Apart from protecting the native flora and fauna, the spreading of exotic flora (e.g. Japanese knotweed) is prevented.





Evides Industriewater, inventive.