Rehabilitation of pressurized pipelines for gas and water supply

Trenchless rehabilitation methods for pressurized pipelines are efficient and cost-effective procedures for the rehabilitation and renewal of piping systems.

by Dipl.-Ing. Dr. techn. Gerhard Kiesselbach

The trenchless method consists of “technologies” and not of “working methods”, as in conventional installation in open trenches, however, with the result that particular attention must be devoted, in particular, to rehabilitation requirements and quality assurance during implementation of the procedures in order to assure safe and reliable piping system operation in the long term. Sustained safe utilization of rehabilitated pressurized pipelines will be possible only provided the quality requirements for planning, the materials used, the specialist companies entrusted with rehabilitation, the inspections and documentation involved in implementation of rehabilitation, etc., are comprehensively met. Trenchless rehabilitation methods make it possible to cut the costs of rehabilitation and/or renewal of pressurized pipelines significantly compared to conventional installation of new pipelines. The organizations responsible must, however, ensure that technical rules, in which not only the planning and execution requirements for these methods, but also the consequences for piping system operation and for maintenance, are contained, for all those trenchless rehabilitation methods for which technical rules are not yet available but which nonetheless are in successful practical use and are therefore a component of the present-day state of the art.

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published: Vulkan-Verlag GmbH, 3R 12 / 2004 (December 2004), 12|2004
Keywords: Landfilling, Material Recovery, Policy Tax Instruments