Development of Automated Electromagnetic Techniques for Inspecting Inner Cracks of LPG Tanks
LPG tanks are essential storage device in refineries and were frequently subjected to SCC on inner surface during service and must be inspected from inside regularly. MT or PT are two conventional methods used for the inspection but is very costly and toilsome because of the requirement of scaffolding and the extreme hot working condition inside the tank. Practical experience had shown that epoxy layer may be applied on the inner surface of the LPG tanks to alleviate SCC however extra work of epoxy layer removal was required before MT or PT. In this study, an automated inspection method based on multi-channel electromagnetic technique was developed in lieu of conventional MT or PT. A remote operated scanner with magnetic rollers carrying inspection probe tracking by a video camera were incorporated in this method. Experimental results and field trials had shown that this innovational design may detect real cracks down to 10mmL?á1mmD in dimension and to assure the full coverage of inspection area. Meanwhile, with this method, scaffolding and epoxy removal may be also relieved to reduce to maintenance cost and, the inspection work is no longer a toilsome one.
LPG tanks Electromagnetic Eddy current Automation Video
Yung-How WU Feng-Ju HSIEH Mu-Chung PENG Hsing-Jeng YANG Vicent LIN
Industrial Technology Research Institute, Chinese Taipei2China Petroleum Corporation, Chinese Taipei China Petroleum Corporation, Chinese Taipei
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
2070-2077
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）