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Keywords: steel
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Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-429
... ABSTRACT Sulfide stress cracking (SSC) is a form of hydrogen embrittlement of steels involving corrosion and tensile stress in the presence of water and hydrogen sulfide. Despite extensive study of SSC in the literature, the mechanisms of SSC initiation and transition to cracking are not fully...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-404
... reduce the fatigue behavior, so that the prevailing fatigue classification may not be valid. Using different steel grades, non-load-carrying attachments were wet SMAW welded at different water depths. The samples were fatigue tested and statistically evaluated. The fatigue strengths were found to be very...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-418
... ABSTRACT In this paper, basic material behavior and mechanical properties of linepipe steel under high pressure hydrogen were investigated. Hydrogen exposure test was first conducted to evaluate hydrogen absorption into the steel from gaseous hydrogen up to 25MPa. It was found that around...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-420
... ABSTRACT Hydrogen-assisted cold cracking (HACC) is one of the most common forms of fabrication cracking in the welding of ferritic steels. HACC occurs when hydrogen becomes trapped inside the fusion zone or heat affected zone during rapid cooling, and, in the presence of sufficiently high...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-427
.... In this paper, in order to clarify the effect of those factors on an initial corrosion groove formation behavior and a SSC crack initiation behavior, 4PB SSC tests were conducted under 0.15 bar H 2 S partial pressure condition using Grade X65 steel plate with relatively high surface hardness at 0.25mm from...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-372
... Mn steel specimens were obtained by three-point bending test. According to the definition of CTOD, the critical CTOD simulation values of three-point bending specimens at different CTOD calculated positions were calculated. By comparing the results of simulation and experiment, the value range...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-161
... test string pipe weld offshore pipeline proceedings engineering upstream oil & gas liner girth weld eigenvalue analysis variation artificial intelligence anomaly imperfection triple point cross-section steel host pipe artic engineering polar engineering conference...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4103
... Resistant Steel for Cargo Oil Tank of Crude Oil Tanker Hiroshi Ikeda1), Itaru Samusawa2), Shunichi Tachibana1), Kazuhiko Shiotani1), Eiji Mishima3) 1) Steel Research Laboratory, JFE Steel Corporation, Kurashiki, Okayama, Japan 2) Steel Research Laboratory, JFE Steel Corporation, Fukuyama, Hiroshima, Japan 3...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4106
... on the sour resistance of line pipe steels Marc-Antoine Thual1, Nuria Sanchez Mourino1, Laura Moli Sanchez1, Lode Duprez1 1ArcelorMittal Global R&D Gent Gent, Flanders, Belgium ABSTRACT INTRODUCTION When exposed to harsh conditions like sour environment, the resistance The effect of Ni on the SSC resistance...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-4108
... upstream oil & gas interpass temperature metallic material metals & mining weld cghaz drilling equipment weldability test light optical micrograph steel micrograph microstructure proceedings seamless pipe application subsea system hardness renewable energy thickness...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-241
... ABSTRACT Linepipe steels for sour service need to have a sufficient resistance to sulfide stress cracking (SSC) under sour environment. Thermo-Mechanical Controlled Processing (TMCP) has been applied as a key process for producing high strength steel plate with fine bainitic microstructure...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-091
... of such failure mode is performed using Finite Element Analysis (FEA). The analyses consider nonlinear phenomena including the interaction between the liner and the backing steel, but are time-consuming. This can be improved using design space description and exploration combined with statistical regression...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-610
... ABSTRACT Recently, there has been discussion in the literature about the potential effect of local hard zones (LHZ) in thermo-mechanically controlled processing (TMCP) linepipe steels on the integrity of pipelines in severe sour service. This has generated interest to understand the sulfide...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-417
... ABSTRACT Suction piles fabricated with glass fiber-reinforced plastic (GFRP) have been regarded as alternatives to conventional steel or reinforced-concrete suction piles to reduce the transportation cost and corrosion risk. However, difficulty may arise in suction installation due...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-528
... ABSTRACT A high manganese steel was originally famous for the Hadfield steel which exhibits excellent work hardening behavior and is widely applicable in actual use. After that, the high manganese steel attracted attention again as nonmagnetic steels for development of a railway bridge...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-448
... with calcium containing steel in which the carbon and the sulfur contents are less than 0.1 mass% and less than 0.002 mass% respectively and the manganese content is 1.5 mass% is applied for the Ichthys project. These line pipes meet the target value in all HIC tests. UOE line pipes suitable for a mild sour...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-611
... ABSTRACT Carbon steels are the cost-effective materials of choice for pipelines and casings for sour service in the oil and gas industry. In this work hydrogen permeation, absorption and trapping was studied in several line pipe and OCTG steels. It is shown that H absorption in line pipe...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-529
... ABSTRACT Hydrogen uptake into steels used in corrosive or hydrogen-containing environment may cause degradation of material property leading to premature fracture under load bearing condition. Hydrogen embrittlement effect can appear in many forms of fracture behavior of steels including...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-522
... ABSTRACT Sensitivity of ST52 steel for environmental assisted cracking (EAC) is experimentally investigated by slow strain rate tests (SSRT). An experimental set up is introduced and tensile test specimens are prepared according to ASTM E8. The strain rate, duration of cathodic protection (CP...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-453
... constructed by HY-80 steel, especially thick plate, have been established using experiment, measurement data and FE analysis. It is found that the major factors affecting the distortion of the pressure vessel are angular distortion and transverse shrinkage. To estimate these factors, predictive equations have...

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