Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Pressure Vessel Technology》 2018-08
Add to Favorite Get Latest Update

Experimental Research on the Inner Detection Process of Ultrasonic Phased Array for Gas Storage Well

ZHONG Hai-jian;GUO Wei-can;MIAO Cun-jian;Zhejiang Provincial Special Equipment Inspection and Research Institute;Key Laboratory of Special Equipment Safety Testing Technology of Zhejiang Province;  
The wall thickness reduction of the underground compressed natural gas storage well due to corrosion occurred on its inner and outer surfaces is one of its main failure modes. Therefore,wall thickness measurement is a main item for periodic detection. A corrosion detection technique using cylindrical convex ultrasonic phased array was proposed according to the well shape,and a cylindrical convex phased array probe with 512 array elements was developed. For the detection of the storage well with dimensions of177 mm × 10. 36 mm,the influences of process parameters such as active aperture,focal length,gain and gate threshold,etc. were studied,and the experiment researches with artificial defects were conducted for parameters optimization. According to the optimized process parameters,the detection tests were carried out on the specimen on the storage well test platform. The results show that the proposed detection technique has a higher detection sensitivity and efficiency to the corrosion defects,and can detect the pitting corrosion of more than 2 mm and line corrosion of 1 mm width.
【Fund】: 浙江省质监系统科研计划项目(20160122);; 浙江省科技计划项目(2017C33162)
【CateGory Index】: TE988
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved