Articles

Defect Detection for the Bottom Plate of Oil Tank Based on Ultrasonic Lamb Waves

  • HUANG Zhiqiang;WANG Mingbo;WANG Weibin;KANG Yewei;LI Qin;ZHOU Yi
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  • 1. MOE Key Laboratory of Equipment for the Oil and Gas, Southwest Petroleum University, Chengdu 610500, China;2. Petrochina Pipeline R&D Center, Langfang 065000, Hebei Province China

Received date: 2013-01-31

  Revised date: 2013-02-28

  Online published: 2013-06-08

Abstract

Aiming at the situation that the bottom edge plates of oil tank often corrode in the process of long-term service, a kind of detection technology based on ultrasonic lamb wave had been developed. Relevant experimental study is carried out. The equipment for auto-testing tank is designed. Simulation analysis on the steel plate with the thickness of 14mm is conducted; the curve of excitation angle is calculated. The result is that for the lamb wave of A0 mode, optimum excitation angle is 70°. The experimental model with the ratio of one to one for refined oil tank bottom plate of 20000m3 is designed and processed. By using designed UT350 flat guided wave testing system, the experiment is developed on the model plate, the best test results is obtained while the excitation signal frequency is 490 kHz. The result of experiment indicates that low frequency pulse signal of A0 mode lamb wave is able to detect the defects of large-sized plates. The tank bottom automatically detection device that walks close to the storage tank wall is designed; the device is able to realize the continuous, high efficiency, and stability online detection process for the defect of oil tank bottom plate. The research results and designed device achieve the defect detection for the bottom plate of oil tank. The technique provides security for the safe operation of the storage tank.

Cite this article

HUANG Zhiqiang;WANG Mingbo;WANG Weibin;KANG Yewei;LI Qin;ZHOU Yi . Defect Detection for the Bottom Plate of Oil Tank Based on Ultrasonic Lamb Waves[J]. Science & Technology Review, 2013 , 31(16) : 47 -50 . DOI: 10.3981/j.issn.1000-7857.2013.16.010

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