..., this could lead to underestimate or overestimate the risk at the time of operation because the mechanical characteristics tend to show a more significant variance. Therefore, it would be recommended that the oil and gas industry propose to develop a methodology to monitor these changes. pipeline steel...

...” qualification to the ASME B31.12 Code for Hydrogen Piping and Pipelines. This paper will present the background analysis, evaluation, development of the logic, proposed B31.12 code language and how to implement the logic. ductility fracture fatigue hydrogen microstructure pipeline steel...

... and is also used in fracture mechanics-based tools, such as CorLAS™, for assessing flaws in cylindrical bodies, such as pipelines. There is limited strain hardening data for pipeline steels in available literature. This led to the development of a correlation utilizing the ratio of yield stress to ultimate...

... are in good agreement with full-scale burst tests (FSBTs) by researchers at TC Energy and at the University of Tokyo, and with Maxey s original treatment of the effect of backfill on fracture velocity at high pressures. Key Words: Fracture arrest, CTOA, ductile fracture propagation, pipeline steel, DWTT...

... size pipeline steel CROSS-SECTIONAL GRAIN SIZE HOMOGENEITY EFFECT ON STRUCTURAL STEEL FATIGUE PERFORMANCE IN AIR AND HYDROGEN ENVIRONMENTS Douglas Stalheim1, Andrew Slifka2, Pello Uranga3, Dong-Hoon Kang3, Enrico Lucon2 1DGS Metallurgical Solutions, Inc., Vancouver, WA USA 2National Institute...

... CORROSION BEHAVIOR OF NOVEL Cr2MoNbTi PIPELINE STEEL IN CO2 ENVIRONMENT Wenliang Zhang Lining Xu* University of Science and Technology Beijing, Beijing, China China Petroleum and Chemical Corporation(SINOPEC) Beijing, China University of Science and Technology Beijing, Beijing, China Shaoqiang Guo...

... 1 Copyright © 2012 by ASME TOMOGRAPHY OF INCLINED SCC CRACKS IN AUSTRALIAN GAS PIPELINES Erwin Gamboa and Luke Zadow The University of Adelaide Adelaide, South Australia, Australia ABSTRACT Stress Corrosion Cracking (SCC) in pipeline steel occurs when an aggressive environment and tensile stresses...

... 04 03 2009 The application of high strength pipeline steels for oil and gas transmission is believed to provide greater gas flow capacity due to increased design pressure, and reduced line pipe cost due to material tonnage savings. However, the use of high strength pipeline steels...

... 10 12 2008 This research reports a special case of stress corrosion cracks (SCC) in the pipeline steels that had propagated in the direction deviated from the pipe radial direction. It was characterized that the cracks were intergranular in nature with relatively wide crack crevice...

... 07 10 2008 The microstructure of high grade pipeline steels, including X65, X70, X80, X100, were studied by SEM and EBSD, respectively. It was found that the microstructures of high grade pipeline steels were composed of lower bainite, granular bainite and acicular ferrite. The phases...