An algorithm for third-party intrusion action detection in oil and gas pipelines based on fine-grained feature enhancement
September 2025
The extensive distribution of oil and gas pipeline networks across China results in frequent third-party intrusions in high-consequence areas, significantly increasing the risk of pipeline failures...
Reliability analysis of gas pipelines considering spatial and temporal corrosion variability
September 2025
The accelerating deterioration rate, notably due to corrosion in buried gas pipelines, has prompted the development of a systematic methodology for assessing structural integrity. This study introduces...
Experimental study on overpressure and flame characteristics of hydrogen-methane mixture
September 2025
In order to evaluate the consequences of hydrogen-methane mixture explosion accidents in open space and confined space, large-scale (8 m3) open space and confined space (55 m3) hydrogen-methane mixture...
Research on multi-objective optimal route selection method for natural gas transmission pipeline
September 2025
By the end of 2022, the nation’s natural gas pipeline network had reached 12.0 million kilometers, with projections suggesting an expansion to approximately 163,000 km by 2025. This rapid growth, coupled...
A mechanistic model for flow accelerated corrosion prediction of a 90° carbon steel elbow in CO2 environments
September 2025
A mechanistic model for the prediction of CO2 flow accelerated corrosion (FAC) at a 90° carbon steel elbow is developed. Homogenous chemical reactions, electrochemical reactions at the metal/solution...
A Simplified Predictive Model of Thermal Cycling on Initiation of Stress Corrosion Cracking
Available online 29 September 2025
This paper develops a simplified predictive model to investigate the role of thermal cycling in the evolution of a corrosive environment for the initiation of stress corrosion cracking (SCC) on the...
Multi-Priors Tensor Completion for Highly Under-sampled Magnetic Flux Leakage Signal Reconstruction
Available online 29 September 2025
Magnetic flux leakage (MFL) detection has been extensively employed in the safety maintenance of oil and gas pipelines. However, MFL signals are frequently rendered incomplete owing to missing entries...
Study on phase change characteristics of water hammer in LNG liquid pipeline
Available online 29 September 2025
•A one-dimensional flow model based on phase transition is proposed.•The water hammer of LNG pipeline under different initial conditions is analyzed.•The water hammer cavitation under phase change is...
Numerical analysis of mechanical behavior of casing pipe during the process of ramming
Available online 27 September 2025
Horizontal directional drilling (HDD) is an efficient, non-intrusive technique for construction projects, such as pipeline installations across rivers, as it minimizes surface and environmental disruptions...
Fuzzy DEMATEL-Based Risk Assessment Framework for Natural Gas Pipeline Shutdown Operations
Available online 22 September 2025
Shutting natural gas pipelines is a controlled process designed to safely halt gas flow for maintenance, inspections, and repairs. This process involves various technical, human, and emergency-related...
Effect of oxygen and nitrogen on hydrogen adsorption and permeation processes
Available online 14 September 2025
•Dissolved gas variations negligibly affect Deff during hydrogen charging.•High H surface coverage and slow Tafel reaction rate occurred in N2 condition.•N and O atoms shown lower adsorption energies...
Hydraulic Transient Analysis in Low Gas-Liquid Ratio Pipelines Under Valve Closure Conditions: Pressure Surge Characteristics and Predictive Modeling
Available online 14 September 2025
•Pressure surge mechanism of liquid column separation was revealed.•Influence of gas-liquid ratios and flow regimes on water hammer was quantified.•A critical gas-liquid ratio for negligible water hammer...
Acoustic signal-based identification of pipeline defects using optimized MFCC and LSTM
Available online 13 September 2025
Detecting and classifying structural defects in pipelines under complex operational conditions remains a challenge. This study proposes a multi-class recognition method combining an improved Mel Frequency...
Numerical simulation study on leakage and diffusion of medium and low pressure buried gas pipelines considering soil cavitation effect
Available online 10 September 2025
Buried gas pipelines often experience leakage accidents due to factors such as corrosion, natural disasters, and third-party damage, leading to dangerous events such as fires, explosions, and soil erosion...
Numerical Simulation of High-pressure Cavitation Characteristics of Thick Orifice Plate
Available online 8 September 2025
•Transient simulation can reflect transient and variable cavitation flow•There is a periodic cavitation phenomenon between cavitation and non-cavitation flow•In a certain pressure drop range, periodic...
Synthetic Magnetic Flux Leakage Signal Generation Using Diffusion Models: A Novel Approach to Improve Pipeline Defect Detection Accuracy
Available online 8 September 2025
Magnetic flux leakage (MFL) based inline inspection techniques effectively ensure the safety of oil and gas pipeline transportation. The application of deep learning models to MFL signal processing...
Transformation mechanism of martensite-austenite (M-A) constituent in the heat-affected zone of high strength pipeline steel and its correlation with toughness deterioration
Available online 4 September 2025
Martensite-austenite (M-A) constituent in the heat affected zone (HAZ) usually plays a detrimental role in toughness, especially in the intercritically reheated coarse-grained (ICCG) HAZ. However, its...
Experimental and numerical investigation of repaired pipeline by composite sleeve using DIC technique and FEM
Available online 4 September 2025
This research investigates the impact of a composite laminate sleeve on a corroded pipeline during a hydrostatic test, adhering to the ISO-24817 & ASME PCC-2 standards, employing the Digital Image Correlation...
Comprehensive Review on Fitness-for-Service Assessment of Corroded Pipelines - Focus on Model Validation and Industry Applications
Available online 4 September 2025
Corrosion poses a significant threat to global pipeline infrastructure, compromising burst capacity and causing severe safety, environmental, and economic impacts. These pipelines transport gases and...
A Comparative Study on the Effect of GMAW Welding Current on the Performance of API 5L GrB Pipeline Steel Welds for Oil and Gas Industrial Applications
Available online 3 September 2025
The reliability of oil and gas transportation depends heavily on weld quality during pipeline construction. This study investigates the effect of gas metal arc welding (GMAW) current on API 5L GrB pipeline...
An MILP model for the coupled design and operation optimization of large-scale gathering pipeline networks
Available online 3 September 2025
The optimization of gathering pipeline networks (GPNs) involves both design and operation, which are highly interdependent but often addressed separately, leading to suboptimal solutions and higher...
A semantic segmentation and Fluent simulation-based quantitative detection method for natural gas pipeline leakage
Available online 2 September 2025
•GasUNet with SCConv achieves 87.62% Dice and 77.99% IoU, outperforming nnUNet and U-Net in gas leakage segmentation.•Machine vision enables non-contact leakage quantification, combining semantic segmentation...
Characteristics of liquefied natural gas facility incidents and associated greenhouse gas emissions: A statistical analysis
Available online 2 September 2025
Liquefied natural gas (LNG) facilities play a pivotal role in the natural gas (NG) trade, serving essential functions in marine terminals, storage, utilities, vehicular fuel, and specialized applications....
Insight into integrity and corrosion behaviour of damaged pipe casing L80 13-3/8” schedule 40 under marine conditions: A preliminary study
Available online 1 September 2025
This study investigates the susceptibility of API 5CT L80 Type 1 to stress corrosion cracking (SCC) induced by mechanical drilling and excessive torque as a precursor in offshore environments, thereby...
