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...
Intelligent Prediction and Adaptive Control of Cutter Wear for Pipe Jacking Machines in Complex Geological Conditions
Available online 22 June 2026
Pipe jacking is widely used in urban underground pipe networks and cross-region pipeline projects. Conventional inspection and replacement practices based on fixed distances or experience cannot track...
Multi-field Coupling Failure Mechanism in Mountainous CBM Pipelines: Synergistic Effects of Terrain-Induced Gas–Liquid–Solid Separation and Intermittent Operation
Available online 18 June 2026
This study investigates an internal corrosion-induced failure of a mountainous coalbed methane (CBM) pipeline under intermittent gas supply. The transported medium contained impurities such as H₂S,...
Dynamic Model of Pipeline Pullback Loads in Horizontal Directional Drilling
Available online 17 June 2026
Pipeline pullback loads in horizontal directional drilling (HDD) are critical for drill rig selection and pipe strength design. Current calculation methods are predominantly static, making it challenging...
Supplementary Evaluation Method for Maximum Deflection of Pipeline Systems with Expansion Joints under Bending and Axial Tension
Available online 14 June 2026
•When bending occurs, the joint simultaneously experiences a relative tensile displacement.•Monotonic loading tests revealed that the tensile limit angle of all bellows expansion joints is smaller than...
NTIME-DEPENDENT RELIABILITY ANALYSIS OF PIPELINES INTEGRATING BURST PRESSURE MODELING, FATIGUE CRACK GROWTH, AND STOCHASTIC OPERATIONAL LOADING
Available online 13 June 2026
•Integrated reliability framework combining fatigue and burst modeling.•Ln-Sec model achieves similar accuracy to CorLas at lower cost.•Time-dependent failure probabilities under stochastic pressure...
3D finite element–based meta-models for evaluating the structural response of buried steel pipelines under Gaussian-shaped localized subsidence
Available online 13 June 2026
•Parametric study based on 3D FEM of buried pipelines under ground subsidence.•A meta-model for the curvature transmission rate to the pipeline (1080 simulations).•Meta-models for axial stress, shear...
Hydrogen absorption, diffusion, and equivalent fugacity of Ni steels exposed to thiosulfate solutions
Available online 9 June 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...
Effect of heat treatment on failure behavior and hydrogen-induced stress corrosion cracking mechanisms of Cr-Ni-Mo Steel in H2S environments
Available online 9 June 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...
Influence of Fe3C on corrosion inhibition efficiency of Benzyldimethylhexadecylammonium chloride: Galvanic Corrosion interaction and adsorption behaviour
May 2026
Corrosion products formation on carbon steel in oil and gas environments can induce galvanic corrosion and hinders corrosion inhibitor (CI) adsorption due to surface heterogeneities (i.e., roughness,...
Failure mechanism of sealing rubber exposed to supercritical CO₂ during rapid depressurization based on equivalent thermo-mechanical coupling damage model
May 2026
•An Equivalent thermo-mechanical coupling damage model is developed.•The S-CO2 diffusion, deformation and damage of rubber O-ring are studied.•S-CO₂ is more likely to cause damage to O-rings compared...
A numerical study on flow and heat transfer characteristics of the LNG storage tank feed pipeline
May 2026
As a low-carbon fuel, liquefied natural gas (LNG) requires strict temperature control during transportation. Direct injection into pipelines at ambient temperature induces significant thermal stress,...
Adaptability study of gas equations of state for the calculation of thermophysical parameters of hydrogen-blended natural gas
May 2026
•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...
Enhancing hydrogen pipeline safety: Perspectives on resilience against hydrogen-induced degradation
May 2026
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...
Hydraulic transient analysis in low gas-liquid ratio pipelines under valve closure conditions: Pressure surge characteristics and predictive modeling
May 2026
•Pressure surge mechanism of liquid column separation was revealed.•Influence of gas-liquid ratios and flow regimes on water hammer was quantified.•A critical gas-liquid ratio for negligible water hammer...
Investigation of water displacement process in pipelines: An improved mechanistic model and its numerical implementation
May 2026
Multiphase flows are very common in industrial operations. In offshore oil and gas production, transient processes in long pipelines can lead to water accumulation, which must be removed using gas–oil...
Full-scale tests and numerical investigation on the bending strain failure of low-strength-matched X80 pipeline girth welds
May 2026
The fracture behavior and strain capacity of girth welds in large-diameter high-grade steel pipelines are crucial for their structural design and safe operation. This study conducts full-scale four-point...
A bibliometric review of hydrogen storage and transportation safety research
May 2026
Rising concerns over carbon emissions from fossil fuels have fueled interest in renewable energies. Hydrogen, as a clean energy source, stands out for its free of pollution and high calorific value....
Effect of Cr content on softening mechanism of the heat-affected zone of X80 GMAW automatic girth weld
May 2026
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...
Characterizing properties of pipeline girth welds: A novel testing protocol and validation
May 2026
Accurate, region-specific mechanical properties of pipeline girth welded joints are fundamental for structural safety design and integrity assessment. This study focuses on X80 pipeline girth welded...
Acoustic detection of gas pipeline leakage based on CPO-VMD and multi-feature extraction
May 2026
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,...
A comparative study on the effect of GMAW welding current on the performance of API 5 L GrB pipeline steel welds for oil and gas industrial applications
May 2026
The reliability of oil and gas transportation depends heavily on weld quality during pipeline construction. This study investigates the effect of gas metal arc welding (GMAW) current on API 5 L GrB...
