European gas engineering organizations. Natural gas and hydrogen as raw energy carriers. Research and development works within GERG and GDF framework. Suggestions tor research improvement in Europe.
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Basic static states of a damaged sewer. Theoretical assumptions for load causing buckling and jump. Possibility of making static computations for a liner in a way adapted to a particular case (Directives ATV-M 127-2.)
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General criteria of applying non-digging methods of technical rehabilitation of sewer pipes (economic, social, ecological, legal and technical conditions). Current standards and directives concerning designing and technical reception of CIPP sleeves. Results of performance errors at CIPP sleeves' installation. Basic examination of the hardened sleeves (geometrical parameters, tightness of coating's wall, wall's thickness).
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