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Grouted lining systems for the renovation of old steel pipelines and the design of new pipelines
Expanded Title:In South Africa steel pipes have been installed as late back as 1930. Steel pipes amongst other need to be protected against corrosion. This is normally achieved by the provision of an internal lining and external coating. Some of the liner systems that have been used in the past have to be replaced and in the case of Rand Water the largest water utility, consideration is given to install grouted viscous-elastic liners in a number of their pipelines to extend their useful life. Practical challenges exist to install liners at joints, bends, pipe transitions, fittings, branches and at valves. In selecting a liner, one of the major aspects to consider is whether the pipeline still has sufficient structural capacity for the intended use. The structural contribution of the different layers in the composite pipe influences the buckling characteristics of the pipeline. Thus the objective of this study was to investigate alternative lining systems applicable for South African conditions. The experimental work involved the following: • Establish the ease of installation for liners which could be used for steel pipelines; • Test the installation of joints; • Establish how the liner performs under high internal pressure; and • Determine if the liner could be installed along bends. Through the experiments the study has demonstrated that HDPE liners do have potential in the rehabilitation of steel pipelines, since they also provide some structural strength and possible ease of installation, as well as overcome some of the problems associated with current lining practices. The study has shown that more work needs to be done on the use of the materials on pipe bends and other fittings
Date Published:01/09/2012
Document Type:Research Report
Document Subjects:R & D - Water and Energy
Document Keywords:Hydrology
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:1448/1/12
ISBN No:978-1-4312-0317-8
Authors:Van Vuuren SJ
Project Leader:Tebicki DDP
Project No:K5/1448
Organizations:Rand Water; University of Pretoria
Document Size:2 978 KB
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