Failure Analysis of the Leakage and Ignition of an Oil–Gas Mixture Transportation Pipeline

Due to the high moisture content and strong corrosion of oil–gas mixtures, the electrochemical corrosion and perforation leakage of their transportation pipelines occur frequently in the western oil fields of China. Using various methods, this work investigates the failure of an L360NB carbon steel...

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Bibliographic Details
Published in:Journal of failure analysis and prevention 2022-02, Vol.22 (1), p.259-266
Main Authors: Song, C. L., Liu, X. B., Pan, X., Chen, Q. G., Wang, P., Fang, Y.
Format: Article
Language:English
Subjects:
Carbon steels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Corrosion
Corrosion and Coatings
Corrosion inhibitors
Corrosion products
Corrosion rate
Electrochemical corrosion
Failure analysis
Gas mixtures
Gas pipelines
Hydrogen sulfide
Insulation
Leakage
Materials Science
Moisture content
Natural gas
Oil fields
Petroleum pipelines
Pipelines
Quality Control
Reliability
Safety and Risk
Solid Mechanics
Spontaneous combustion
Static electricity
Steel pipes
Technical Article > -Peer-Reviewed
Transportation
Tribology
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Summary:Due to the high moisture content and strong corrosion of oil–gas mixtures, the electrochemical corrosion and perforation leakage of their transportation pipelines occur frequently in the western oil fields of China. Using various methods, this work investigates the failure of an L360NB carbon steel pipeline in detail. The obtained results show that the present leakage and ignition of this pipeline are mainly attributed to the local electrochemical corrosion. In fact, the transported oil–gas mixture in this pipeline is usually composed of H 2 S and O 2 , besides CO 2 and Cl - . Under their comprehensive actions, the corrosion rate increases, which firstly leads to the perforation and leakage within a local domain. Then, the mechanical friction between the mixture and the insulation layer readily causes static electricity. Consequently, the spontaneous combustion of the corrosion product, FeS, may promote fire formation. In addition, the methods used for removing the H 2 S gas and corrosion inhibitors are discussed, which provides effective tools for the suppression of the electrochemical corrosion of pipelines.
ISSN:1547-7029
1728-5674
1864-1245
DOI:10.1007/s11668-021-01279-4