... geologist corrosion management compressed natural gas (cng) hydraulic fracturing h2s management production chemistry reservoir geomechanics steel geology oilfield chemistry geological subdiscipline pipeline steel specimen hydrogen exposure coupon distribution network steel pipe...

... microstructure fracture toughness hydrogen embrittlement hardness specimen girth weld pipeline steel figure 1 placement embrittlement martin Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024...

... to hydrogen gas. The discussions are based on testing of fatigue endurance, fracture toughness and fatigue crack growth of pipeline steels in air and various pressures of pure hydrogen gas. The results shall further be used as documentation for decision to use, and design of existing natural gas pipelines...

... of hydrogen damage and it effects to mechanical properties are presented. Hydrogen enhanced fatigue mechanism is clearly presented and related testing methods are introduced. Recent investigations of pipeline steels reveal that 67.7% reduction of fatigue strength due to increment of hydrogen pressure...

... ABSTRACT The primary goal of this research is to investigate the effect of defect on the fatigue-induced magnetic behavior of a ferromagnetic steel. Uniaxial cyclic loading tests on X70 pipeline steel were carried out with various stress levels. The variation of the magnetic signals surrounding...

... aluminum specimen anode steel ac corrosion subsurface corrosion upstream oil & gas current density steel specimen electrically heated pipeline specimen materials and corrosion frequency riser corrosion evolution pipeline steel gas evolution AC Corrosion of Electrically Heated...

.... Introduction Low carbon pipeline steels with high strength and toughness have been used widely to transportation of crude oil and natural gas over a long distance under high pressure (Witek, 2015; Eskandari, 2016; Zhong, 2006). In order to improve the transportation efficiency, the diameter and transportation...

... which one of the most successful application cases is HTP (High Temperature process) practice for heavy gauge, high strength pipeline steels. Combined the strengthening effects of TMCP (Thermo Mechanical Control Process) and retardation effects of austenite recrystallization with increasing Nb...

... ruggieri pipeline steel geometry procedure extension j-ctod relation crack size ctod crack growth resistance curve resistance curve specimen fracture specimen displacement Understanding the J-CTOD Relationship in SE(T) Specimens and Implications for Crack Growth Resistance Curves in Pipeline...

... diffusivity midstream oil & gas high-strength steel hydrogen steel pipeline piping simulation hydrogen permeation rate pipeline steel steel solubility pipeline pipeline project piping design susceptibility dislocation metals & mining hydrogen diffusivity Strain Ageing of High...

... ABSTRACT In order to investigate the role and mechanism of the residual stress on the stress corrosion behavior of the pipeline steel, SSRT test was adopted to study the stress corrosion behavior of the base metal of X80 UOE pipe with different residual tensile stress in the simulated soil...

... ABSTRACT Electrochemical hydrogen permeation measurements have been performed on pre-strained pipeline steel base metal and weld simulated heat affected zone specimens. The level of plastic pre-strain was 0-3%. The effective diffusion coefficient decreased with higher pre-strain. At higher pre...

... High strength pipeline steels have different plastic properties in each direction. This anisotropy is developed by TMCP processes in a heavy plate mill. The process may also lead to anisotropic ductility and toughness of the plate. The purpose of this study is to develop a constitutive model...

... the materials' resistance to plastic deformation. It enables the materials to sustain overload and raises the safety margin. In general, the true stress-true strain curve of polycrystal materials after yielding is paracurve. requirement pipeline steel cnpc uniform elongation ultimate strength...

... conference engineering pipeline steel application strain capacity key issue piping simulation defect midstream oil & gas Key Issues should be considered for application of strain-based designed pipeline in China Xiao Li School of Material Science and Engineering, Xi an Jiaotong University. Xi...

... This work provides the development of compliance solutions and eta- factors for experimental measurements of resistance curves in structural and pipeline steels using SENT specimens. A summary of the methodology upon which J and crack extension are derived sets the necessary framework...

... negative impact on the integrity of pipelines. The present study describes a microstructure model capable of predicting HAZ softening. Modern pipeline steel grades X70, X80, and X100 were selected to study their propensity of HAZ softening. The model was first benchmarked against the hardness measurements...