Pressurized pipelines are mainly water and gas pipelines. Because of their specificity, their technical condition is not systematically assessed, unlike the gravity sewage pipelines. Technical condition of pressurized pipelines is assessed on the basis of water or gas leakages. When the level of the leakage becomes unacceptable, it is time for the renovation. If the technical condition of the pipeline is overall good and its construction safely transfers the load, it is sufficient to seal the pipe using one of the available technologies. If carrying capacity is threatened, application of the inliner (CIPP liner or a new plastic pipe with a smaller diameter) capable of transferring the loads is necessary.

dr inż. Andrzej Kolonko, Politechnika Wrocławska

Wrocław University of Science and Technology graduate. He specializes in the urban infrastructure and actively promotes modern trenchless technologies. For many years he has been the organizing secretary of the international science and technology conference. “Underground infrastructure of cities”. Wrocław University of Technology academic teacher and researcher. He cooperates with foreign scientific centres and companies. He is the author and co-author of numerous publications in national and international magazines including: “Constructions of Sewerage Ducts”, “Microtunneling” and “Renovation of water pipes by cementing”. In addition, he is the author and the co-author of three patents and a utility model.