Influence of the Corrosion Anomaly Class on Predictive Accuracy of Burst Capacity Models for Corroded Pipelines

Abstract

The present study investigates the impact of corrosion anomaly classes on the prediction accuracy of seven existing burst capacity models for corroded pipelines, namely B31G, B31G-M, Shell92, PCORRC, PCORRC-M, CSA and RSTRENG, based on 897 corrosion anomalies on 16 naturally corroded pipe specimens removed from in-service pipelines. The 897 corrosion anomalies are classified into seven classes, namely pin hole, axial slotting, axial grooving, circumferential slotting, circumferential grooving, pitting and general corrosion, based on the pipeline operators forum (POF) anomaly classification system. The seven burst capacity models and finite element analyses (FEA) are employed to evaluate the burst capacities of the corrosion anomalies. The accuracies of the burst capacity models are assessed and compared based on the FEA-to-model predicted burst capacity ratios for different classes of anomalies. The results suggest that the PCORRC model is suitable for the non-general classes of corrosion anomalies, whereas the CSA model is recommended for the general corrosion class of anomalies.

Prediction on Failure Pressure of Pipeline Containing Corrosion Defects Based on ISSA-BPNN Model

“…Scholars at home and abroad have studied the failure pressure prediction model of oil and gas pipelines, for example, the AGA Pipeline Research Committee proposed NG-18 circumferential failure stress calculation formula based on fracture mechanics, Kiefner and others proposed B31G criterion for residual strength calculation of single corrosion defect, and ASME revised it several times later, the most commonly used version is ASME B31G-2009 [6]. It also has the LPC criterion by British Gas, the PCORRC criterion by Battelle, and the DNV-RP-F101 standard by British Gas and the Norwegian classification society DNV [7][8][9]. However, the above-mentioned traditional forecasting models are conservative and have low accuracy, which has certain limitations.…”

“…Calculate the fitness value and update the sparrow position (7). If the termination condition is satisfied, end and output the result; otherwise, repeat steps 2-6.…”

Special Issue on “Analysis, Design, Construction and Performance of Buried Structures”

“…This Special Issue of the International Journal of Geosynthetics and Ground Engineering aims to provide the readers with selected contributions that are broadly within the area of underground structures, namely pipelines [1][2][3], tunnels and buried bridges [4,5], culverts [6], and buried wave barriers [7]. The contributions came from both the practicing engineers and the researchers to provide insights into the current state of practice as well as the recent developments in analytical solutions, numerical modeling and data analysis.…”

“…This study shows that the thermally induced plastic strain can have significant effects on the uplift resistance of pipes buried in frozen clay material. The second article by Bao and Zhou [2] focuses on examining the impact of corrosion anomaly on burst capacity of corroded pipelines. The accuracies of different burst capacity models have been assessed and compared for different classes of anomalies.…”