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...
PGC-YOLO: A real-time pipeline defect detection framework with multi-feature optimization and image enhancement
Available online 1 October 2026
This study introduces an integrated intelligent inspection system for urban drainage pipelines to address challenges associated with low illumination, complex materials, and diverse defect patterns....
Deep learning-based intelligent path planning system design for subsea pipeline laying
September 2026
Subsea pipeline route planning is one of the core challenges in marine engineering. Traditional methods, which rely on manual expertise and static algorithms, struggle to adapt to complex and dynamic...
Analytical probability distribution of running fracture length in transmission pipelines with crack arrestors
September 2026
This paper presents analytical derivations of the probability distribution of running fracture (RF) length in steel transmission pipelines that are equipped with crack arrestors. The RF length is defined...
Comparative study on the effects of sudden expansion and sudden contraction structures on the deflagration characteristics of hydrogen-methane-air
September 2026
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...
FPE‑YOLO: real‑time small‑object detection for third‑party damage in oil and gas pipeline integrity monitoring
September 2026
•A bio-inspired FPE-YOLO framework for small object detection in pipeline intrusion monitoring.•Progressive three-stage enhancement: attention → cross-scale fusion → feature enhancement.•Fovea Attention...
Dent strain and stress analyses and implications for API-RP 1183 - Part IIIB: Fatigue-life prediction for dented pipes
September 2026
API Recommended Practice (RP) 1183 considers three levels of assessment. Its processes up through Level 2, which were considered viable for single peak dents with smooth profiles, are the focus of Part...
Economic viability of liquefied natural gas pipeline construction: Influence of cascaded utilization of cold energy and distance-volume factors
September 2026
•Theoretical feasibility of LNG pipeline transportation is investigated.•The economic boundaries of LNG pipeline transportation are explored.•The application potential of LNG pipeline transportation...
Life-line assurance in the urbanization process: revealing the coupled safety resilience of municipal underground pipelines and its influential characteristics
September 2026
•A novel DANP-CSR-MUPs framework is developed for evaluating the coupled safety resilience of Municipal Underground Pipelines (MUPs) using the DANP method.•The study evaluates four major MUP types (gas,...
Microscopic mechanism of wax precipitation and gelation of waxy crude oil based on molecular dynamics simulation
September 2026
•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,...
