Saving costs is a major attraction of wet welding application in structural repairs of offshore installations. Nevertheless, improve the quality of wet welding to get it as close as possible to plain structural steel quality and also qualify welding procedures in AWS D3.6 class ‘A’ have been challenges not consistently overcome. This paper describes wet welding trials in shallow waters (5m and 10m) with a rutile and an oxy-rutile type, both commercial electrodes. Two different base metal compositions were employed in the preparation of butt and fillet joints. The main objective is to amend new results of wet weds properties to those already published aiming the application of this welding technique under more reliable conditions and the qualification of welding procedures. The weldments were tested by Vickers hardness, Charpy V notch, tensile, shear strength, bending and fillet weld break tests, chemical and macrographic analysis. Some of these properties and diffusible hydrogen, obtained in laboratory with a mechanized gravity system, will also be presented in order to complement or explain the field testes results obtained. Both electrodes produced class AWS E 70XX weld metals and overall results according class “B” requirements of the AWS D3.6M:2010 code. Some good elongation results obtained encourage future trials to achieve class “A”. Barriers to the class “A” qualification of welding procedures in shallow waters are also discussed.
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ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering
June 9–14, 2013
Nantes, France
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5535-5
PROCEEDINGS PAPER
Wet Welding Field Trials in Shallow Waters for Structural Repairs in Floating Oil Production Units
Ezequiel C. P. Pessoa,
Ezequiel C. P. Pessoa
IFMG, Betim, MG, Brazil
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Alexandre Q. Bracarense,
Alexandre Q. Bracarense
UFMG, Belo Horizonte, MG, Brazil
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Valter R. Santos,
Valter R. Santos
PUC-Rio, Rio de Janeiro, RJ, Brazil
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Fernando C. R. Assunção,
Fernando C. R. Assunção
PUC-Rio, Rio de Janeiro, RJ, Brazil
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Maurício J. Monteiro,
Maurício J. Monteiro
PUC-Rio, Rio de Janeiro, RJ, Brazil
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Ricardo R. Marinho,
Ricardo R. Marinho
Petrobras, Rio de Janeiro, RJ, Brazil
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Leonardo A. Vieira,
Leonardo A. Vieira
ESAB Soldagem e Corte, Contagem, MG, Brazil
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Dario Barbalho Siva
Dario Barbalho Siva
Continental Serviços Marítimos, Macaé, RJ, Brazil
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Ezequiel C. P. Pessoa
IFMG, Betim, MG, Brazil
Alexandre Q. Bracarense
UFMG, Belo Horizonte, MG, Brazil
Valter R. Santos
PUC-Rio, Rio de Janeiro, RJ, Brazil
Fernando C. R. Assunção
PUC-Rio, Rio de Janeiro, RJ, Brazil
Maurício J. Monteiro
PUC-Rio, Rio de Janeiro, RJ, Brazil
Ricardo R. Marinho
Petrobras, Rio de Janeiro, RJ, Brazil
Leonardo A. Vieira
ESAB Soldagem e Corte, Contagem, MG, Brazil
Dario Barbalho Siva
Continental Serviços Marítimos, Macaé, RJ, Brazil
Paper No:
OMAE2013-10097, V003T03A004; 8 pages
Published Online:
November 26, 2013
Citation
Pessoa, ECP, Bracarense, AQ, Santos, VR, Assunção, FCR, Monteiro, MJ, Marinho, RR, Vieira, LA, & Siva, DB. "Wet Welding Field Trials in Shallow Waters for Structural Repairs in Floating Oil Production Units." Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Materials Technology; Ocean Space Utilization. Nantes, France. June 9–14, 2013. V003T03A004. ASME. https://doi.org/10.1115/OMAE2013-10097
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