Study on cleavage fracture mechanism in the heat-affected zone of X80 GMAW automatic girth weld
March 2026
Embrittlement of the heat-affected zone (HAZ) of girth weld has large effect on the service safety of high strength pipelines. In the present study, the cleavage fracture mechanism of X80 automatic...
Effect of hydrogen trap density on efficiency of irreversible traps in a line-pipe steel
March 2026
Hydrogen embrittlement (HE) presents a significant challenge for the enduring reliability of high-strength steels employed in pipelines and energy infrastructure. This challenge arises from the intricate...
Pipeline transportation strategy and key technological breakthroughs for high-quality development of hydrogen energy industry under the dual carbon goals
March 2026
China’s hydrogen scale-up hinges on resolving midstream bottlenecks that move volumes from resource-rich northern and western basins to demand-dense coastal corridors. A structured synthesis of policy,...
Factors influencing pipe stress responses in pipe jacking in bedrock: Field monitoring and numerical simulation
March 2026
To investigate the stress response of pipes during jacking in bedrock, longitudinal stresses of deep pipes were analyzed through field monitoring and numerical simulations conducted at various locations....
A simplified predictive model of thermal cycling on initiation of stress corrosion cracking
March 2026
This paper develops a simplified predictive model to investigate the role of thermal cycling in the evolution of corrosive environment for the initiation of stress corrosion cracking (SCC) on the external...
Composite repair of large size diameter pipe with severe metal loss defects
March 2026
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...
Mechanical response of the pressure pipeline rehabilitated by polymer liner under the action of surface load
March 2026
The mechanical behavior of pressure pipelines rehabilitated with polymer liners under surface loads remains poorly understood. In this study, a three-dimensional model of a pressure pipeline repaired...
Insight into integrity and corrosion behaviour of damaged pipe casing L80 13-3/8″ schedule 40 under marine conditions: A preliminary study
March 2026
This study investigates the susceptibility of API 5CT L80 Type 1 to stress corrosion cracking (SCC) induced by mechanical drilling and excessive torque as a precursor in offshore environments, thereby...
Numerical simulation study on leakage and diffusion of medium and low pressure buried gas pipelines considering soil cavitation effect
March 2026
Buried gas pipelines often experience leakage accidents due to factors such as corrosion, natural disasters, and third-party damage, leading to dangerous events such as fires, explosions, and soil erosion...
Pipeline unidirectional guided wave generation based on a hybrid piezoelectric transducer ring and wave-packet modification
March 2026
For pipeline inspection, unidirectional guided waves are required to concentrate energy in a single propagation direction while suppressing backward-traveling components. Conventional time-delay methods...
Adaptability of simulation state equation of hydrogen-blended natural gas pipeline
March 2026
At present, hydrogen transportation in natural gas pipeline network is the main mode of hydrogen energy transportation. Accurate description of the physical parameters of mixed gas is the key to the...
Experimental data-driven streamlined approach for tampering detection in oil and gas pipelines
March 2026
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,...
USA pipeline girth weld failures: an alternative metallurgical analysis of the literature
March 2026
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...
A two-fluid model incorporating droplet entrainment to predict pressure drop and holdup for CO2 two-phase flow in horizontal and vertical pipe
March 2026
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...
Axisymmetric FE-based reliability analysis of corroded pipelines using advanced approaches
March 2026
•A tool for efficient reliability analysis of corroded pipelines is proposed.•A mesh generator, a finite element software and reliability methods are combined.•Failure pressure results are compared...
Comprehensive review on fitness-for-service assessment of corroded pipelines - focus on model validation and industry applications
March 2026
Corrosion poses a significant threat to global pipeline infrastructure, compromising burst capacity with severe safety, environmental, and economic impacts. These pipelines transport gases and crude...
Numerical study on the aerothermal characteristics in the vacuum tube transportation system
Available online 26 March 2026
•We study the dynamic aerodynamic thermal characteristics of the vacuum tube transportation system•The generation of the shock waves and blockage effect intensify aerodynamic heating•The reflected compression...
Risk analysis of buried natural gas pipelines using an integrated cloud model and failure mode and effects analysis approach
Available online 25 March 2026
•A novel integrated FMEA method is proposed for risk analysis of pipelines safety.•The cloud model is used to handle randomness and uncertainty.•A synthetic dynamic weighting method is provided to determine...
Analytical and numerical studies on the nonlinear stability of the encased FGP-GPLs oval linings under mechanical loadings
Available online 24 March 2026
The functionally graded porous (FGP) linings reinforced by graphene platelets (GPLs) are applied to rehabilitate damaged pipes in practical engineering. The lining is susceptible to local buckling under...
Scenario construction and risk evolution of long-distance pipeline accidents: A data-driven integrated analytical framework
Available online 23 March 2026
•A theoretical framework for complex system is constructed from static factor analysis to dynamic evolution based on the STAMP•A combined method containing the association rule analysis, social network...
On-site Quantitative Risk Assessment of Urban Underground Pipelines Using Geo-Registered Augmented Reality
Available online 23 March 2026
To address the challenges of strong data heterogeneity, difficulties in dynamic risk assessment, and insufficient on-site decision support in the safety operation and maintenance of urban underground-pipeline...
Research on the Mechanism of Water Blending Regulating Flow in Gathering and Transportation Pipelines and Crude Oil Sticking to the Wall
Available online 22 March 2026
This study investigates multiphase flow and crude oil adhesion in near-wellbore pipelines during mechanical recovery, using a visual experimental setup to analyze water blending mechanisms. A composite...
Mechanism study on viscosity reduction of heavy oil via synergistic microwave with magnetic particles and viscosity reducer
Available online 20 March 2026
The viscosity reduction method by employing magnetic nanoparticles and viscosity reducers with microwave was employed to reduce the viscosity of heavy oil. The synergistic effects of three magnetic...
Non-additive effects of CO and H2O impurities on H2 dissociation and subsurface diffusion on Fe(110): A first-principles study
Available online 18 March 2026
Impurities such as CO and H2O are inevitably present in hydrogen transport pipelines and can strongly influence hydrogen uptake and embrittlement of structural steels. However, the fundamental mechanisms...
Unravelling corrosion mechanisms of X80 pipeline steel in ammonia environment with chloride and oxygen
Available online 17 March 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...
