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Keywords: heating
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Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-462
... A Study on Welding Distortion Mitigation by Gas Heating Using a Linearized Inherent Strain Method Hector Ruiz 1, Naoki Osawa 1, Sherif Rashed 2 1 Department of Naval Architecture & Ocean Engineering, Osaka University 2 Joining and Welding Research Institute, Osaka University Suita, Osaka, Japan...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-119
... ABSTRACT Plates with double curvature are widely used in shipbuilding, and induction heating for plate bending is usually employed in shipyards due to its advantages such as high precision, high efficiency and so on. In this study, induction heating equipment with high frequency and 25KW in...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-014
... prediction procedure dimensional analysis technological parameter ship hull plate artificial intelligence steel plate heating inherent strain method procedure deformation line heating dong tum angular deformation heat source coefficient machine learning thermal process...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-377
... ABSTRACT A development programme founded by the Norwegian Research Council for further increase the competitiveness of the direct electrical heating (DEH) technology was initiated in 2016 and will finish at the end of 2018. The partners in this project have long experience in development...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-728
... Abstract Submarine XLPE (cross-linked polyethylene) insulated cables of wet design have been manufactured and delivered by Nexans for more than 40 years, including cables for Direct Electric Heating (DEH) of flowlines for the last 15 years. In a DEH system the cable is strapped (‘piggybacked...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-719
... Abstract Hydrate management by direct electric heating (DEH) has been in use for 15 years. The system has been continuously improved and adapted to the specific requirements during the development of new fields. Presently the system is designed for around 5 years of usage during the lifetime...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-523
... Abstract The manual flame heating has been used in the conventional line heating to form the curved plate. High frequency induction heating could be a good alternative process for the automation of line heating process because of its easiness to control the heat flux. The purpose of this study...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-285
... greater heat loss to the cold surroundings, increasing the chance of the oil temperature falling below the WAT and allowing time for wax precipitation and final deposition. 32 A turbulent flow exerts a viscous force, which drags or sloughs deposited wax from the pipe wall. When this viscous drag exceeds...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-246
... subsurface sediment motions. In this paper, a numerical approach is described to investigate the effects of gas hydrate dissociation induced by constant heating from a hot wellbore on sediment engineering properties and the radial extent of hydrate dissociation influence zone. The effects of the following...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-297
... Abstract As it becomes profitable to extract oil and gas from smaller reservoirs, jumpers (t-offs) connected to the main flowlines become necessary. Hydrate management of these jumpers may be solved by electrical heating systems. This requires development of new subsea electric power...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-549
...% after the thermal aging. pipe deformability heating offshore shear area uoe line pipe microstructure line pipe thermal aging heat treatment frequency distribution longitudinal direction uniform elongation crack arrestability polygonal ferrite shinohara Mass Production of X70...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-075
... ABSTRACT In this study, the performance of the sea water cooling system was analyzed by comparatively testing its cooling performance against that of the following methods using diverse sea water heat sources and the existing deep sea water intake systems of the Deep Sea Water Research Center...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-613
... A Study on Remaining Correction Heating Efficiency of Ship Blocks after Lifting Myung Su Yi, Yun Sok Ha, Rajesh S.R. Samsung Heavy Industries Co., Ltd, Institute of Industrial Technology, Welding Research Geoje-Si, Gyeongsangnam-Do, South Korea ABSTRACT The deck of ship blocks are mainly made of...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-189
... Performance Characteristics of Tandem Heat Pump System using Deep Ocean Water Ho-Saeng Lee1, Hyeon-Ju Kim , Dong-Ho Jung1, Seung-Won Lee1 and Deok-Soo Moon1 Deep Ocean Water Application Center, Korea Ocean Research & Development Institute Goseong-gun, Gangwon-do, Korea . . ABSTRACT This study...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-326
... EBSD Characterization of Arctic Steel during in situ Heating A. J. Enstad1, M. Karlsen1,2, S. P. Astad2, J. Hjelen1, J. K. Solberg1, O. M. Akselsen1,3 and E. Østby3 1 Norwegian University of Science and Technology. 2 Statoil ASA. 3 SINTEF. Trondheim, Norway ABSTRACT The present work involves...
Proceedings Papers

Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-477
... Influential Factors Affecting Inherent Deformation during Plate Forming by Line Heating (Report 5) The Effect of Water Cooling Adan Vega Department of Mechanical Engineering, Technological University of Panama, Panama Masashi Nawafune Graduate School of Engineering, Osaka University, Ibaraki...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-231
... ABSTRACT The use of Direct Electrical Heating (DEH) for sub-sea pipelines has become a method for hydrate and wax management control either by itself, or as part of other hydrate management and control techniques. The method is based on resistive heating of the steel pipe by leading electrical...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-254
... measured by 3-dimensional measuring instrument. From the results, the principal factor controlling the global bending distortion was identified as the bending moment associated with the longitudinal shrinkage force and transverse shrinkage caused by welding and flame heating and the change of the centroid...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-509
... results show that the collapse pressure after coating is predicted by heating the column sample machined from pipes as received. In conclusion, this study indicates the methodology for reliably evaluating the resulting collapse pressure without the full-scale test and the sampling from the coated pipe...
Proceedings Papers

Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-185
... In order to clarify the mechanism of thick plates forming by complex line heating, the distribution characteristics of inherent deformation produced by overlap, parallel and cross heating lines is studied. From this study it is found that the final inherent deformation is not a simple addition...

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