Title: A new method for predicting the failure pressure of locally corroded oil and gas pipelines

Authors: Ziyan Feng; Mingwei Cui

Addresses: College of Chemical Engineering and Safety, Binzhou University, Shandong, China ' College of Chemical Engineering and Safety, Binzhou University, Shandong, China

Abstract: The increasing number of aging oil and gas gathering pipelines in China has significantly increased pipeline failure accidents due to local corrosion. However, so far no method was especially geared to calculating the failure pressure of locally corroded pipeline. This paper validated the reliability of nonlinear finite element method to assessing locally corroded pipeline. It has respectively investigated the effects of local corrosion morphology, corrosion radius, and corrosion depth on pipeline axial and hoop stress, failure position and failure pressure. Referring to stress concentration theory, meanwhile, combined with numerical simulation, this paper has established a new method for calculating the failure pressure of locally corroded pipeline, and comparing with B32G (modified), DNV-RP-F101, and recently developed method PCORRC this method has small and even distributed errors, and can meet the demand of predicting the failure pressure of locally corroded pipeline. [Received: March 2, 2023; Accepted: March 25, 2024]

Keywords: oil and gas pipeline; local corrosion; corrosion morphology; corrosion dimension; nonlinear finite element method; calculation method.

DOI: 10.1504/IJOGCT.2024.140909

International Journal of Oil, Gas and Coal Technology, 2024 Vol.36 No.3, pp.296 - 311

Received: 01 Mar 2023
Accepted: 25 Mar 2024
Published online: 03 Sep 2024 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article