Quantification of the maximum allowable pressure penalties in hydrogen transmission pipelines: A parametric assessment of the material performance factor Hf under ASME B31.12–PL Option A
November 2026
•Quantifies maximum allowable pressure penalties in hydrogen transmission pipelines.•Compare ASME B31.12 and ASME B31.8 using identical geometry and material inputs.•Identifies activation of fracture-control...
Hydrogen-steel interactions in gaseous environments studied by density functional theory
November 2026
Hydrogen transport in pipelines contributes to accelerated realization of a full-scale hydrogen economy. However, steel pipelines are potentially susceptible to hydrogen embrittlement in high-pressure...
A high-efficiency strategy for blending hydrogen into high-pressure natural gas pipelines: Mechanics modeling and numerical analysis
November 2026
High-pressure hydrogen blending in natural gas pipelines is a key pathway for large-scale hydrogen utilization, while mixing uniformity directly affects pipeline safety and measurement accuracy and...
Study of model adaptability and thermophysical property variations for ammonia and its mixtures
November 2026
•Model adaptability of ammonia and its mixtures’ thermal properties was evaluated.•Variations of thermophysical parameters for ammonia and its mixtures were analyzed.•Impurities significantly affect...
Hydrogen absorption, diffusion, and equivalent fugacity of Ni steels exposed to thiosulfate solutions
November 2026
•Permeation measured by Devanathan–Stachurski; thiosulfate as H₂S proxy.•C₀ decreases monotonically with Ni; ∼10 × lower at 5 wt.% Ni.•Ni raises corrosion potential, incorporates in the superficial...
Effects of corrosion product films on hydrogen embrittlement of X80 steel
November 2026
•Corrosion product films (FeCO3, Fe2O3, FeS) hinder hydrogen permeation into X80 steel.•Hydrogen barrier effectiveness increases in the order: FeCO3 < Fe2O3 < FeS.•FeS-covered steel reduce hydrogen...
Risk transmission mechanism and prevention framework of hydrogen pipeline: A dual-drive hybrid approach
November 2026
Hydrogen energy stands as a pivotal secondary energy carrier for achieving carbon neutrality, yet its high propensity for leakage, ignition, and cascading explosions presents unprecedented multi-state,...
A predictive model for the ultimate burst pressure of hydrogen-blended natural gas pipelines considering the spatial non-uniformity of material properties
November 2026
Hydrogen-blended natural gas transportation via existing pipelines represents an effective approach for large-scale, efficient hydrogen delivery. Existing natural gas pipelines have various defects,...
Investigation of hydrogen embrittlement of X52 base metal and weld metal in hydrogen blended natural gas
November 2026
•The fatigue crack propagation performance and fracture toughness of X52 pipeline steel base metal and weld metal are different to the sensitivity of hydrogen embrittlement under different hydrogen...
Numerical and Experimental Study on Leakage Characteristics of Hydrogen-Blended Natural Gas during Pipeline Transport
November 2026
A computational fluid dynamics (CFD) model was developed to investigate leakage characteristics of hydrogen-blended natural gas pipelines, and validated using a dedicated experimental platform with...
A magnetic flux leakage inspection defect identification method for hydrogen-blended pipelines based on a hybrid 1D-CNN-LSTM neural network
November 2026
Hydrogen-induced degradation phenomena, including hydrogen embrittlement and hydrogen-induced cracking, pose a significant threat to the structural integrity of carbon steel pipelines in high-pressure...
Numerical investigation of key factors influencing the mixing performance of static mixers for hydrogen-blended natural gas
November 2026
Blending hydrogen into existing natural gas pipelines has emerged as a pivotal strategy for the efficient transportation of hydrogen. Static mixers, as the core components in such pipelines, play a...
Fatigue crack growth behaviour and life prediction of X80 hydrogen-blended natural gas pipelines under cyclic internal pressure
November 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...
Hydrogen transport: An integrated materials–integrity–systems review of legacy natural gas pipeline conversion to pure hydrogen service
November 2026
Repurposing high-pressure natural gas pipelines for hydrogen is increasingly viewed as a technically viable and often economically preferable alternative to newbuild corridors for medium to long-distance,...
The role of green hydrogen in the transition to renewable energy: Production, marketing strategies and future prospects
November 2026
The global transition toward low-carbon energy systems has intensified interest in green hydrogen as a key enabler of deep decarbonization, particularly in sectors in which direct electrification remains...
Effect of heat treatment on failure behavior and hydrogen-induced stress corrosion cracking mechanisms of Cr-Ni-Mo Steel in H2S environments
November 2026
•The SCC of Cr-Ni-Mo steel in H2S environments is dominated by anodic dissolution and hydrogen embrittlement, with N&T steel showing superior resistance to SCC compared to Q&T steel.•2.N&T treatment...
Systematic Adaptive Engineering and Field Verification for Sequential Transportation of Methanol in Existing Gasoline Pipelines
Available online 6 November 2026
To support large-scale, long-distance methanol transportation through in-service refined-product pipelines, this study develops an integrated framework of risk assessment, system retrofit, and full-scale...
Risk analysis of water precipitation and pipeline corrosion in high-pressure CO2 transport environment containing impurities
Available online 6 November 2026
•A mutual solubility model for impure CO2 transport systems is established.•The effects of different impurity gas types and combinations on H2O solubility are revealed.•The impact of impurities on water...
Mechanical behavior of pipeline steel after strain aging. Part II: Modeling
Available online 6 November 2026
•Pearson coefficient of the numerical tensile curves exceeds 0.95.•Key model inputs are obtained from the tensile curve before strain aging.•Bake hardening at 250°C reaches saturation after only 5 min.•The...
Influence of Interfacial Impedance on the Potential and Current Distribution in Buried Pipelines near Coating Defects
Available online 6 November 2026
Buried coated pipelines under cathodic protection provide one of the most reliable means of transporting materials over long distances. However, coating damage during service can expose the base metal,...
Operating stress ratio, failure mode and incident cost in US gas and hazardous liquid pipelines: a pre-registered analysis of PHMSA incident reports
Available online 6 November 2026
•Rupture odds in gas pipe rise 2.1-fold per 10 SMYS points of hoop stress at failure.•The liquid estimate is similar but not testable under the pre-registered rule.•The legacy seam test failed; its...
Traveling ability of the Multi-module Pipeline Inspection Gauges in unconventional pipeline conditions: elbows and tees
Available online 10 October 2026
•This paper built a full-size fluid-driven experiment platform for testing the differential driven pressure of PIGs.•This paper built a 3D FSI simulation model of the multi-module PIGs in unconventional...
Structural damage analysis for subsea buried piplines under near-fault pulse-type ground motions
Available online 10 October 2026
This study focuses on the structural response characteristics of subsea buried pipelines under pulse-type fault displacement, and places special emphasis on the effects of loading history and loading...
An Integrated Framework for Weld Radiographic Marker Attribute and Sequence Recognition
Available online 10 October 2026
Weld radiographic marker recognition is essential for ensuring traceability, weld quality control, and integrity management in pipeline construction and maintenance. Despite the increasing application...
ADC-YOLO: A lightweight X-ray weld defect detection model for small and multi-scale defects under background interference
Available online 10 October 2026
•The ADown module is introduced to optimize downsampling, preserving small-scale defect details while reducing computational overhead.•Dilation-wise residual (DWR) is integrated into C3k2 to create...
