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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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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Microscopic Mechanism of Wax Precipitation and Gelation of Waxy Crude Oil Based on Molecular Dynamics Simulation
Available online 9 June 2025
•Molecular dynamics model links cooling-driven van der Waals dominance to gelation phase transition.•Wax-wax attraction drives gelation, aligning with macro-rheological trends..•RDF peaks rise, Rg drops,...
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Experimental Data-Driven Streamlined Approach for Tampering Detection in Oil and Gas Pipelines
Available online 9 June 2025
Pipelines are essential links of the energy sector for transporting and distributing energy products across countries and from refineries to terminals. With the increasing value of energy products,...
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USA pipeline girth weld failures: an alternative metallurgical analysis of the literature
Available online 9 June 2025
Following reports of pipeline girth weld failures in the USA, Australian Pipeline & Gas Association (APGA) convened a workshop to discuss the technical requirements and structural integrity of their...
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A Critical and Bibliometric Review of Life Cycle Cost Analysis Integration into Decision Support Systems for Pipeline Asset Integrity Management
Available online 6 June 2025
•Maintaining pipeline integrity is essential for safety, environmental protection, and energy security.•Traditional pipeline management is reactive, leading to high costs, safety risks, and inefficiencies.•Life...
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Failure analysis due to collapse pressure in CT-90 coiled tubing in the Mexican oil industry
Available online 4 June 2025
Failure analysis of the ruptured CT-90 grade steel coiled tubing (CT) with a diameter of 44.45mm (1.750"), which became trapped at the bottom of the well, was conducted. Mechanical and microstructural...
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A Two-Fluid Model Incorporating Droplet Entrainment to Predict Pressure Drop and Holdup for CO2 Two-Phase Flow in Horizontal and Vertical Pipe
Available online 4 June 2025
CCUS technology is currently the best practice for reducing CO2 emissions, with pipeline transportation as the primary method for the long-distance, large-scale transport of captured CO2 to storage...
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A novel variable weighted yield criterion and its applications in burst pressure prediction of corroded pipelines
Available online 30 May 2025
The strength theory is a study of the materials' yielding and failure under complex stress. The burst pressure of pipelines with corrosion cannot be predicted accurately under complex loadings. One...
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Burst pressure models and validations for thick-walled pipelines containing corrosion defects
Available online 23 May 2025
Corrosion is one major threat to pipeline integrity. Over the past decades, many corrosion models have been developed for determining the remaining strength of corroded pipelines, including ASME B31.G,...
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Seismic Fragility in Life Cycle Cost Analysis for Gas Pipelines: Design and Cost Optimization Framework
Available online 22 May 2025
This study proposes an innovative approach to optimizing the seismic design of pipeline network by incorporating life-cycle cost analysis (LCCA). The research integrates seismic design, which includes...
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Standards and codes for hydrogen in pipeline infrastructure: testing, qualification, and integrity assessment
Available online 21 May 2025
•Framework with Gaps: Current standards provide foundational guidance for qualifying materials and infrastructure in hydrogen service but are insufficient for addressing the unique challenges of hydrogen...
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Failure mechanism of sealing rubber exposed to supercritical CO₂ during rapid depressurization based on equivalent thermo-mechanical coupling damage model
Available online 19 May 2025
•An Equivalent thermo-mechanical coupling damage model is developed•The SC-CO2 diffusion, deformation and damage of rubber O-ring are studied•SC-CO₂ is more likely to cause damage to O-rings compared...
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Effect of Cr content on softening mechanism of the heat-affected zone of X80 GMAW automatic girth weld
Available online 16 May 2025
Softening of the heat-affected zone (HAZ) could lead to strain concentration in the girth weld joint, which endangers the service safety of high strength pipelines, while the chemical composition and...
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Composite Repair of Large Size Diameter Pipe with Severe Metal Loss Defects
Available online 10 May 2025
A full-scale testing program was conducted to evaluate the use of carbon-epoxy composite repair technology to reinforce severe corrosion defects in large-diameter pipes. The technical elements associated...
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Combined Ductile-Brittle Fracture Simulation of API X80 Under Impact Loading
Available online 8 May 2025
This study explores finite element (FE) simulation of the combined ductile-brittle fracture behavior of API X80 steel under impact loading, incorporating the influences of strain rate and adiabatic...
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Thermal and Residual Stress Distributions in Butt Fusion Joints of HDPE Pipes: FE Simulation and Experimental Validation
Available online 8 May 2025
Butt fusion welding is widely applied for connecting high density polyethylene (HDPE) pipes but may generate residual stresses in the welded joints, interfering the bearing capacity and the service...
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Carbon dioxide pipeline leakage risk assessment based on pipeline failure probability correction and CO2 concentration dispersion distance prediction
Available online 7 May 2025
Given that supercritical or dense-phase carbon dioxide pipelines operate under high-pressure conditions, there exists a significant risk of high-pressure carbon dioxide leakage due to factors such as...
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