oa Civil Engineering = Siviele Ingenieurswese - Advancement of condition assessment techniques for large diameter pipelines
Condition assessment of ageing pipelines is a continual challenge in South Africa and around the world. Owners of large diameter water and wastewater pipelines face particular difficulties due to several factors, including severe skills shortages, and financial, environmental, demand and access restrictions. While desktop studies can identify pipelines with a high likelihood and consequence of failure, actual condition assessment data has traditionally been difficult to collect, especially in pressurised pipeline systems. This information is particularly important when estimating the remaining useful life of a pipeline, or when considering repair or replacement programmes. A toolbox approach is required for the variety of pipeline materials and conditions encountered. Regardless of the technique used, collecting the information is critical to making informed decisions regarding any pipeline. Rather than embarking on conservative and expensive replacement projects, inspection programmes enable significant cost savings through targeted repairs and rehabilitation
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