TOP-OF-LINE CORROSION-Conclusion: Models updated; remediation strategies set out

Part I of this two-part series (OGJ, July 10, 2000, p. 58) demonstrated that top-of-line corrosion (TLC) in wet-gas pipelines correlates with water-condensation rate (WCR). A model was developed to calculate WCR along the pipe profile and to evaluate the risk of TLC.This conclusion indicates how corrosion-prediction models can be updated and presents remedial actions for the prevention of TLC.CalculationsIn-house corrosion model Lipucor,1 normally dedicated to bottom-of-line corrosion prediction, was been updated for TLC evaluation, with the following assumptions and adjustments:The pipe is full of gas. The WCR, used as an input, is calculated by the line-simulation package. The water co...

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