Transportadora de Gas del Sur Argentina (TGS) is a pipeline company founded in 1992 from a consortium of Enron USA (the technical operator) and Perez Companq Argentina. The TGS system was originally the Southern half of the Gas del Estado (state-owned) gas transmission network. As part of the five-year rehabilitation programme, Pipeline Integrity International (PII) conductet intelligent pigging on the majority of the system. The original rehabilitation programme demanded that parts of the system were inspected at five-years intervals, and so by 1997, two sets of inspection data were available for a significant proportion of the pipeline network. It is assumed that the pipeline system is economic to operate as a result of the 89000 repairs to be conducted between 1994 and 2001. With the planned improvements in the CP system and inspections, 35000 repairs are estimated over the next 100 years. This is less than the 89000 conducted over a seven-year period, and consistent with repair rates for pipelines operating economically in Western Europe. The typical repair rate for these pipelines, known to have 'good' coatings, was four repairs /1000 km-years. This repair rate is very similar to those predicted for parts of the San Martin and Neuba II pipeline. The authors conclude that, by conducting two inspections in two years, followed by 89000 repairs and upgrading the CP system, TGS has extended the life of its 6600-km pipeline system by 100 years.
Lifetime for a pipeline
Lebensdauer einer Pipeline
Corrosion Prevention and Control ; 46 , 3 ; 65-71
1999
7 Seiten, 4 Bilder, 1 Tabelle, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
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