UNDERWATER WET REPAIR WELDING OF API 5L X65M PIPELINE STEEL
Abstract
This paper presents results of the research of effect of polymer insulation of pipeline made of API 5L X65M steel as well as underwater wet welding parameters on properties of joints made by covered electrodes. Effect of heat input on structure and hardness of joints during repair of underwater pipeline was analyzed. Welding defects like microcracks, micro-lacks of fusion, slag inclusions, as well as HAZ hardness increase over an assumed acceptance criterion for welded joints in pipes without anticorrosion polymer insulation, were identified. A significant effect of polimer insulation on structure and properties of welded joints, was found.
Keywords:
underwater welding, wet welding, underwater pipeline, API 5L X65M steelDetails
- Issue
- Vol. 24 No. S1(93) (2017)
- Section
- Latest Articles
- Published
- 23-05-2017
- DOI:
- https://doi.org/10.1515/pomr-2017-0038
- Licencja:
-
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Open Access License
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