Assessing damaged pipelines transporting hydrogen
September 2022
There is worldwide interest in transporting hydrogen using both new pipelines and pipelines converted from natural gas service. Laboratory tests investigating the effect of hydrogen on the mechanical...
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High energy X-ray diffraction and small-angle scattering measurements of hydrogen fatigue damage in AISI 4130 steel
September 2022
Accurate lifetime predictions are critical for repurposing existing pipelines for hydrogen transmission as well as for developing novel steels which are minimally susceptible to lifetime degradation...
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Application of line pipe and hot induction bends in hydrogen gas
September 2022
For the upcoming hydrogen economy, transport pipelines for hydrogen gas and gas mixtures of hydrogen and natural gas are one of the important components. For the application of steel in hydrogen gas...
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Significance of separations occurring in mechanical testing of thermomechanical rolled pipeline steels
September 2022
In this study, the origin of separations is investigated in modern high strength pipeline steels. In-depth microstructure characterization and property correlation is used to demonstrate that preferred...
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Prediction of properties on large diameter welded pipe: case study on 32″ × 16 mm X65 HSAW pipe
September 2022
Large diameter welded pipes are amongst the most cost-effective transportation means for oil and gas. The production of those pipes involves different cold forming steps, as a result of which the mechanical...
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Modeling the effect of backfill on dynamic fracture propagation in steel pipelines
September 2022
In this paper, dynamic ductile fracture propagation simulations were conducted to study the use of smoothed particle hydrodynamics (SPH) for modeling the effects of backfill in pipeline burst simulations. ...
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Influence of stress states on cleavage fracture in X70 pipeline steels
September 2022
Stress state is a primary factor controlling the ductile fracture behavior of steels, which is typically represented as the combination of the stress triaxiality and Lode angle parameter. The cleavage...
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Review of minimum requirements and development of guidance for weld spacing
September 2022
Follow-on work to a recently completed joint industry project pertaining to hot tap branch connections included the development of guidance on minimum spacing between various combinations of adjacent...
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Experimental and numerical study on the flow characteristics of slug flow in a horizontal elbow
Available online 12 August 2022
•Phase distribution of gas-liquid two-phase slug flow at the elbow was clarified.•Effects of elbow on flow characteristics at slug flow were analyzed.•A CFD simulation method for slug flow at the elbow...
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Iceberg-Seabed Interaction Evaluation in Clay Seabed using Tree-Based Machine Learning Algorithms
Available online 1 August 2022
In Arctic offshore regions, the oil and gas hydrocarbons are transferred to the onshore basins through the subsea pipelines. However, the operational integrity of the subsea pipeline may be at risk...
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Review and analysis of pipeline leak detection methods
Available online 1 August 2022
A pipeline burst or rupture causing a leak may significantly impact the environment and the reputation of the company operating the pipeline. In recent years oil and gas pipelines are expected to be...
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Stochastic filter-based fatigue crack growth prediction for pipelines considering unknown model parameters and measurement uncertainty
June 2022
In this study a methodology is developed and implemented in Python for fatigue crack growth prediction in pipelines, by leveraging measurement data and fatigue growth model predictions. Specifically,...
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Identifying two-point leakages in parallel pipelines based on flow parameter analysis
June 2022
Parallel pipelines are widely used to transport energy resources. Leakages usually can occur in pipelines due to aging, corrosion, metal failure, etc. When an accident happened, not only the energy...
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Resilience assessment of a subsea pipeline using dynamic Bayesian network
June 2022
Microbiologically influenced corrosion (MIC) is a serious concern and plays a significant role in the marine and subsea industry’s infrastructure failure. A probabilistic methodology is introduced in...
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A methodology for time-varying resilience quantification of an offshore natural gas pipeline
June 2022
Many resilience definitions and metrics have been presented across various disciplines in recent times. However, from a design and operations perspective, a limited effort is focused on quantifying...
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Uncertainties in internal pressure of oil transmission pipelines and implications for the reliability analysis
June 2022
This study addresses a significant knowledge gap in the reliability-based fitnessfor-service assessment of pipelines, namely the statistical information of the internal operating pressure. To this end,...
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A comparative study of the effect of the soil constitutive model on the seismic response of buried concrete pipes
March 2022
No attention has been given in previous studies to understand the influence of the sophistication of the soil constitutive model on the response of buried concrete pipes subjected to transverse seismic...
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Leakage of gasoil from side cut piping in crude distillation unit of a petroleum refinery
March 2022
•SS316L elbow has been failed after 3 years of gasoil service in side cut piping.•Material defect existed in the elbow due to poor pre-commissioning inspection.•Middle distillate gasoil produced from...
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A new criterion based on strain determination for dent assessment of pipelines
March 2022
Dents are one of the most common defects on pipelines and compromise the structural integrity. To date, relevant studies on failure assessment of dented pipelines have been limited, and the existing...
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Strain-based reliability analysis of dented pipelines using a response surface method
March 2022
Dent defects can decrease the life span of oil and gas pipelines. Therefore, they need constant monitoring and maintenance to ensure the pipeline’s safety and integrity. Subsequently, this paper performs...
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Strain model and experimental study of elastic viscoplastic for crack-tip zone of X80 steel pipe
March 2022
•The elasto-viscoplastic model can thoroughly characterize the mechanical properties of the steel pipe crack-tip.•In elasto-viscoplastic model, the displacement changes larger than the strain field.•The...
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Inferring highly corroded buried pipeline locations through saturated soil resistivity information
March 2022
•Relationship between soil resistivity and maximum pit depth is nonlinear.•Condition assessment data from 3 water mains were investigated.•Saturated resistivity was found to be correlated to the maximum...
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Corrosion of steel in a CO2-containing solution droplet generated in wet gas pipelines studied by scanning Kelvin probe
March 2022
•Measured and discussed the Volta potential of X52 steel under a CO2-containing solution droplet.•Analyzed the relationship between Volta potential and corrosion potential.•Discussed the corrosion mechanism...
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Numerical simulation and experimental verification of pitting corrosion propagation in sweet pipeline service
March 2022
This paper has numerically simulated and experimentally verified the pitting corrosion propagation inside a low-alloy carbon steel pipeline for sweet (CO2) petroleum service. In this study, a Finite-Element-Analysis-based...
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Analysis of full-scale burst tests by FE modelling using constant CTOA fracture criterion
March 2022
Several backfilled full-scale burst tests were recently performed by TC Energy on CSA Z245.1 Grade 550 Category II pipe steels. This paper presents a new interpretation of the recent full scale burst...
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