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Safety Assessment of Vertical Storage Tank Based on Robot Ultrasonic Online Inspection

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Abstract

Robot online inspection is a new technology for nondestructive and quantitative detection corrosion of vertical storage tank without emptying the liquid. The storage tank safety assessment methods for robot online inspection are still at the exploratory stage of development. An online inspection robot has been developed by the authors. This paper studies the evaluation methods of bottom plate corrosion with this robot detection. Aiming to characterize localized corrosion and pitting corrosion, multi-angle evaluation indices are proposed. Mathematical models based on reliability evaluation are derived. Above models and evaluation methods are then validated by a case study. Assessment results show that the maximum corrosion depth of storage tank floor is 2.44 mm, the residual useful life of the storage tank is 5 years, and the center coordinates of localized corrosion region of numbered A is (0.58 m, − 0.01 m), the area is 0.484 m2, and the average corrosion depth is 2.03 mm. Abundant quantitative conclusions are obtained by using the proposed evaluation methods, instead of rough qualitative descriptions. This research provides references for storage tank safety assessments and formation standard based on robot online inspection.

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Acknowledgements

This study was support by the Fundamental Research Funds for the Central Universities of Southwest Minzu University (2021NQNCZ05, 2021101), Southwest Minzu University Research Startup Funds (RQD2021050), and National Key Research and Development Program of China (2016YFC0802102).

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Authors and Affiliations

  1. College of Electrical Engineering, Southwest Minzu University, Chengdu, Sichuan, 610225, People’s Republic of China

    Lei He, Jiachong Wu, **ngyu Wang, Huazhang Wang & Weiwei Wang

  2. PipeChina North Pipeline Company, Langfang, Hebei, 065000, People’s Republic of China

    Yewei Kang

  3. College of Electromechanic Engineering, Southwest Petroleum University, Chengdu, Sichuan, 610500, People’s Republic of China

    Zhiqiang Huang

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  1. Lei He
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  2. Jiachong Wu
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Correspondence to Lei He.

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He, L., Wu, J., Wang, X. et al. Safety Assessment of Vertical Storage Tank Based on Robot Ultrasonic Online Inspection. J Nondestruct Eval 42, 10 (2023). https://doi.org/10.1007/s10921-022-00920-y

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