Results of the experimental study of the fatigue characteristics of the repaired welded joint of the marine stationary oil and gas producing platform

Offshore stationary platforms are actively exploited in the world. The lifespan of some of these platforms exceeds 20 years. Such a significant period of operation leads to the fact that the platforms are exposed to various loads for a long time, causing alternating stresses and, as a result, fatigu...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-10, Vol.952 (1), p.12037
Main Authors: Teodoriu, C, Starokon, I V, Guseynov, Ch S
Format: Article
Language:English
Subjects:
Base metal
Crack propagation
Fatigue cracks
Fatigue failure
Fatigue life
Life span
Offshore platforms
Oil fields
Repair welding
S N diagrams
Welded joints
Welding
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Summary:Offshore stationary platforms are actively exploited in the world. The lifespan of some of these platforms exceeds 20 years. Such a significant period of operation leads to the fact that the platforms are exposed to various loads for a long time, causing alternating stresses and, as a result, fatigue damage, including fatigue cracks in welded joints and the base metal of the platform. When fatigue cracks are identified, defect joints are repaired commonly using welding techniques. However, the duration of the subsequent operation of such repaired welded joints is not currently known. The authors conducted an extensive experimental study to understand the life span of welding repair technologies. This approach was for the first time used to repair the welded joint of a platform located in the White Tiger. White Tiger is the Vietnamese offshore oil field, located 200 km east of Ho Chi Minh City on the shelf of the South China Sea. The result of this study was the fatigue diagram and its equation, which were first obtained by the authors.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/952/1/012037