Method yields safety factor for in-line inspection data

Journal Article · Mon Sep 21 04:00:00 EDT 1998 · Oil and Gas Journal

OSTI ID:651209

Colquhon, I; Menendez, A ^[1]; Dovico, R ^[2]

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1. Transportadora de Gas del Norte, Buenos Aires (Argentina)
2. Arcan Ingeneria y Construcciones, Buenos Aires (Argentina)

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 failure pressure (PF), using Monte Carlo propagation. A maintenance philosophy is discussed from the perspective of likelihood of failures and of information available to support maintenance decisions.

• OSTI ID: 651209
• Journal Information: Oil and Gas Journal, Journal Name: Oil and Gas Journal Journal Issue: 38 Vol. 96; ISSN OIGJAV; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
ARGENTINA
CORROSION
IN-SERVICE INSPECTION
MAINTENANCE
NATURAL GAS
PIPELINES
SAFETY ENGINEERING