Method yields safety factor for in-line inspection data

Iain Colquhon, Arturo Menendez Transportadora de Gas del Norte Buenos Aires Ricardo Dovico Arcan Ingenería y Construcciones Buenos Aires A method for dealing with uncertainties in in-line inspection (ILI) information has been applied to a segment of corroded line in the gas-transmission system of Transportadora de Gas del Norte (TGN) in Argentina. Results of applying the method indicate that the safety factor for ILI data is equivalent to that provided by a hydrostatic test. The methods consist of combining the mean and dispersion of corrosion-defect depth (d) and length (L) data and simulating the effect of these variations on calculations for failu...

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