Parametric study of burst strength for hydrogen blended natural gas pipelines with long corrosion defects
July 2026
Transporting hydrogen through existing natural gas pipeline poses significant challenges due to hydrogen embrittlement (HE), which can compromise the structural integrity of pipelines. This study evaluates...
Effect of oxygen and nitrogen on hydrogen adsorption and permeation processes
July 2026
•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...
Understanding detection success of belowground natural gas leaks in urban environments through controlled release experiments
July 2026
•Urban environment significantly reduces natural gas pipeline leak detection success.•Higher leak rates improve the probability of detection by up to 37 pp (percentage points) compared to lower leak...
Characterization and potential distribution mapping of cathodically protected buried pipelines based on homogeneous and heterogenous factors
July 2026
The use of a close interval potential survey (CIPS) for cathodically protected buried pipelines can provide useful information about the active or passive state of the pipeline/coating interface and...
Synergistic evaluation of regular and radial-fin-integrated pipe performance using limit analysis and evolutionary symbolic modeling
July 2026
Subsea buried pipes in offshore field conditions are most vulnerable to upheaval buckling, a risk that is especially pronounced in soft clay soils where uplift resistance, expressed by the dimensionless...
Transformation mechanism of martensite-austenite (M-A) constituent in the heat-affected zone of high strength pipeline steel and its correlation with toughness deterioration
July 2026
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...
Knowledge graph construction for pipeline standards: Enhancing efficiency in the oil and gas industry
July 2026
The intelligent development of oil and gas pipelines is crucial for overcoming the challenges of transitioning from informatization to intelligence, especially considering the vast number of standards...
Existing natural gas networks for 100% hydrogen transport: a case study in Europe
July 2026
Hydrogen transportation via dedicated pipelines or repurposed existing natural gas (NG) grids is one of the most reliable and cost-efficient means of delivering hydrogen over long distances. However,...
Carbon dioxide pipeline leakage risk assessment based on pipeline failure probability correction and CO2 concentration dispersion distance prediction
July 2026
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...
Unravelling corrosion mechanisms of X80 pipeline steel in ammonia environment with chloride and oxygen
July 2026
Ammonia (NH3) is a promising hydrogen carrier, yet the corrosion mechanisms of pipeline steels in impurity-contaminated NH3 environments remain unclear. This study elucidates the effects of chloride...
Experimental and numerical investigation of repaired pipeline by composite sleeve using DIC technique and FEM
July 2026
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...
A review of the challenges, solutions and economics of hydrogen transmission in steel pipelines
July 2026
Developing transmission pipelines is considered essential to realising renewable hydrogen’s decarbonisation potential in industry, transport, and energy storage. Numerous studies identify pipelines...
Flow characteristics and leakage rate calculations of microchannels in hydrogen-blended natural gas sealing structures
July 2026
•Described the mass transfer process of hydrogen-natural gas multi-component systems.•Developed a flow model for multi-component gases leaking through microchannels on sealing surfaces.•Analyzed the...
Dynamic risk assessment framework for offshore pipelines corrosion under insulation
July 2026
Corrosion under insulation (CUI) remains a critical threat to the integrity and reliability of offshore and marine pipeline systems due to its hidden nature, complex degradation mechanisms, and limited...
Dynamic response of buried pipeline under the sliding instability of slopes in cold regions
July 2026
•Based on SPH-FEM coupling method, the nonlinear dynamic model of buried pipeline under slope instability slide in cold regions is established.•According to the soil with different moving properties,...
Sand transport characteristics and critical sand-carrying velocity of gas-water mixtures in wellbores during hydrate production
July 2026
•Sand transport mechanisms identified under multiphase flow.•Inclination angle strongly affects critical transport velocity.•Gas-liquid ratio alters sand suspension regimes....
An MILP model for the coupled design and operation optimization of large-scale gathering pipeline networks
July 2026
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...
Fatigue crack growth behaviour and life prediction of X80 hydrogen-blended natural gas pipelines under cyclic internal pressure
Available online 6 July 2026
•Fatigue crack growth rate of X80 steel in hydrogen-blended environments calibrated and modified.•Crack–tip stress intensity factor of axial cracked pipelines predicted in real time.•Synergistic degradation...
Vertical soil pressure at the pipe crown of trench-buried pipelines under differential thaw settlement: DEM-informed mechanisms and analytical prediction
Available online 6 July 2026
•Differential thaw settlement amplifies vertical soil pressure at the pipe crown.•DEM reveals shoulder-initiated slip-surface development.•Principal stress rotation governs arching-controlled redistribution...
A novel qualitative assessment method of oil and gas pipeline emergencies by combining improved YOLOv5 and VT-TPMf models
Available online 6 July 2026
This paper proposes an air‑space‑ground integred pipeline threat detection system that fundamentally transforms the inspection paradigm from passive, periodic manual patrols to event‑driven, proactive...
A dual-stage LLM–KG framework for question answering on oil and gas pipeline topologies
Available online 4 July 2026
This paper proposes a dual-stage framework for question answering over oil and gas pipeline topologies by coupling a lightweight topology-first knowledge graph with large language models. The framework...
Experiment research on crack propagation and gas decompression characteristics during the fracture process of CO2 pipelines
Available online 1 July 2026
To reveal the coupling mechanism between decompression phase transition and crack propagation in fractured CO2 pipelines, full-scale supercritical CO2 pipeline rupture tests were carried out, and a...
A method for determining gas supply reliability improvement paths of natural gas pipeline system based on reliability allocation theory
Available online 30 June 2026
•Proposed a method to translate system-level reliability targets into component-level requirements by solving the inverse reliability evaluation problem for pipeline systems.•Quantified and integrated...
Temperature Field Response Mechanism and Bayesian Inversion Localization Method for Small-Hole Leakage in Buried Dense-Phase CO2 Long-Distance Pipelines
Available online 24 June 2026
This study investigates the temperature field distribution and leakage localization associated with small-hole leakage in buried dense-phase CO2 long-distance pipelines through systematic experimental...
Experimental investigation and modelling of mixed cationic and anionic surfactants for corrosion inhibition in CO2 corrosion environments
Available online 22 June 2026
An experimental design involving a 10-point, three-component mixture design was used to investigate mixed corrosion inhibitor performance. The components consisted of surfactants with same tail lengths...
