Hydrogen trapping characteristics of X52 pipeline base metal and weld and their influence on the embrittlement susceptibility under different hydrogen charging conditions
Available online 13 July 2025
•Reversible/irreversible hydrogen trap ratio in HAZ exceeds BM, increasing HAZ vulnerability to hydrogen-induced crack initiation and propagation.•Gaseous hydrogen charging (6.3 MPa) induces low HE...
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A transient model considering non-equilibrium phase transition in CO2 pipe decompression
Available online 9 July 2025
The trend of global warming is becoming increasingly severe, making it imperative to reduce CO2 emissions. Carbon Capture, Utilization, and Storage (CCUS) is a crucial means to achieve this goal. CO2...
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Two-stage optimization method for the simultaneous calibration of pipe roughness coefficients and nodal demands for water distribution networks
Available online 5 July 2025
This paper presents a two-stage optimization framework for the simultaneous calibration of pipe roughness coefficients and nodal demands in water distribution networks (WDNs). Traditional calibration...
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A lightweight pipeline weld radiographs defect detection detector based on Inverted Bottleneck
Available online 4 July 2025
Pipeline weld defect detection is essential for the safety of oil and gas transportation, but visual radiograph inspection is time-consuming and labor-intensive. Intelligent detection often requires...
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Natural gas demand prediction: comprehensive overview of the current situation and future development direction
Available online 2 July 2025
Natural gas demand (NGD) forecasting can accurately estimate the gas demand, and help to plan the gas source configuration, pipeline network transportation and gas storage arrangements in advance, so...
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Quantification of methane emissions from typical natural gas stations using on-site measurement technology
June 2025
•Fugitive methane emission measurements at typical stations of the natural gas pipeline network using a hydrogen flame ionization detector and a high-flow methane tester.•There is a statistically significant...
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Experimental study on the leakage identification for the buried gas pipeline via vibration signals
June 2025
It is difficult to detect and locate small leakages, especially for buried pipelines. Therefore, a non-intrusive leakage identification method for buried gas pipelines is proposed in this study. Accelerometers...
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Experimental and numerical investigation on hyperelastic sealing disc contact behavior in pipeline, a comparison between fluid-driven and pull-through approaches
June 2025
Pipelines are widely recognized as the safest and most efficient means of fluid transportation. Pipeline pigging, a secure and reliable technique, is employed for both cleaning and sealing pipelines...
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Supercritical/dense-phase CO2 pipeline leakage diffusion experiment and hazard distance prediction method
June 2025
The study of the diffusion characteristics of CO2 leakage in pipelines and the determination of the hazardous distance resulting from such leakage under various working conditions are crucial for identifying...
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Reliability analysis of slow crack growth in HDPE pipes: Impact of buried pipeline design and soil characteristics
June 2025
This study delves into one of the most common fracture mechanisms in polyethylene pipes and the primary cause of their long-term failure, the slow crack growth (SCG) phenomenon. This failure mode in...
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Lightweight visible damage detection algorithm for embedded systems applied to pipeline automation equipment
June 2025
This research is designed for low-power, cost-effective and high-performance pipeline defect inspection in embedded systems. The backbone of the algorithm, CSPHet, employs efficient combinatorial convolution...
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Enhanced speed control of pipeline pigs with adjustable bypass using quantitative feedback theory and cascade PID algorithm
June 2025
During pipeline pigging operations, precise control of the pig’s running speed is crucial. However, external speed disturbances often occur during these operations. In response to this challenge, adjustments...
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A new model for predicting characteristics of the near-field leakage in high-pressure CO2 pipelines
June 2025
The safe transportation of carbon dioxide (CO2) is crucial to the successful implementation of Carbon Capture, Utilization, and Storage (CCUS) projects. Accidental leaks in pipelines can pose significant...
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A multi-level classification model for corrosion defects in oil and gas pipelines using meta-learner ensemble (MLE) techniques
June 2025
•The manuscript has potential highlights as addressed below.•A stacking ensemble method was developed to improve the prediction corrosion defect level using multiple classifiers and a logistic regression...
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Factors Influencing Pipe Stress Responses in Pipe Jacking in Bedrock: Field Monitoring and Numerical Simulation
Available online 28 June 2025
To investigate the stress response of pipes during jacking in bedrock, longitudinal stresses of deep pipes were analyzed through field monitoring and numerical simulations conducted at various locations....
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Study on cleavage fracture mechanism in the heat-affected zone of X80 GMAW automatic girth weld
Available online 24 June 2025
Embrittlement of the heat-affected zone (HAZ) of girth weld has large effect on the service safety of high strength pipelines. In the present study, the cleavage fracture mechanism of X80 automatic...
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TEMPORARY REMOVAL: Study on the influence factors of magnetic particle and viscosity reducer synergizing with microwave to reduce viscosity of heavy oil
Available online 23 June 2025
The publisher regrets that this article has been temporarily removed. A replacement will appear as soon as possible in which the reason for the removal of the article will be specified, or the article...
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Axisymmetric FE-based reliability analysis of corroded pipelines using advanced approaches
Available online 20 June 2025
•A tool for efficient reliability analysis of corroded pipelines is proposed.•A mesh generator, a finite element software and reliability methods are combined.•Failure pressure results are compared...
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Hazard evolution of different orifice shapes leakage in buried hydrogen-blended natural gas pipelines
Available online 19 June 2025
Pipeline failures inevitably lead to the formation of various leakage shapes, posing significant hazards. However, the leakage hazards evolution in buried hydrogen-blended natural gas (HBNG) pipelines...
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Adaptability Study of Gas Equations of State for the Calculation of Thermophysical Parameters of Hydrogen-Blended Natural Gas
Available online 16 June 2025
•The adaptability of EoSs for predicting Joule-Thomson coefficient of hydrogen-blended natural gas is evaluated.•GERG-2008 demonstrates high accuracy and adaptability across various thermodynamic conditions.•BWRS-EoS...
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Enhancing hydrogen pipeline safety: Perspectives on resilience against hydrogen-induced degradation
Available online 16 June 2025
Transport of hydrogen in blended form in existing natural gas pipelines contributes to the accelerated realization of a full-scale hydrogen economy. However, steel pipelines are considered susceptible...
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Tree-based Machine Learning Models for Predicting the Maximum Depth of Corrosion Defects Based on Historical In-line Inspection Data
Available online 16 June 2025
•Investigates the application of tree-based supervised machine learning techniques to predict the maximum depth of corrosion defects based on historical ILI dataset.•Historical ILI data from a 250 km...
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Acoustic detection of gas pipeline leakage based on CPO-VMD and multi-feature extraction
Available online 14 June 2025
Detection of gas pipeline leaks is essential for energy security and environmental preservation. Non-contact detection can be accomplished by analyzing acoustic signals produced by gas leakage. Nonetheless,...
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Comparative Study on the Effects of Sudden Expansion and Sudden Contraction Structures on the Deflagration Characteristics of Hydrogen-Methane-Air
Available online 11 June 2025
This study investigates the effect of sudden contraction and expansion structures on the detonation flame propagation of hydrogen-methane-air mixtures through experiments and LES. The study introduces...
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Self-Tuning Clamping Force Control with Optimal Trajectory Tracking for Autonomous Pipe Inspection Robots
Available online 9 June 2025
To address the inability of existing external pipe-climbing robots to adaptively regulate clamping force during operation, a novel robot was developed. To enable automatic clamping in response to varying...
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