Ultrasonic nondestructive testing and in situ regulation technology of residual stress for oil and gas pipelines
XU Chunguang, WANG Junfeng, SONG Jianfeng, TIAN Haibing, LIN Lianpo, RAO Xin
1 School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081,China 2 Department of Automation, Beijing Institute of Technology, Beijing 100081, China 3 Petro-China West Pipeline Company, Urumqi 83000, China
Based on acoustoelasticity theory, the relationship between ultrasonics and stress in oil and gas pipelines is researched. Further, the principle, method and technology of ultrasonic critically refracted longitudinal waves are analyzed. In order to ensure accuracy of test results and realization of quantity traceability, the calibration technology of ultrasonic testing for residual stress is studied. Then the ultrasonic stress testing and calibration system is established. For in situ regulation of residual stress, the interactive relationship between high energy ultrasonics and the residual stress field is studied. It is seen that the surface and internal component residual stress states are changed by effective control of the high energy beam and excitation mode. Finally, the in situ reduction and control of local residual stress distribution in mechanical components in service is realized. Thus, the whole strength, anti-fatigue and corrosion resistance of mechanical components in service are improved, and the service life, safety and reliability of components are also enhanced. This technology now is used in testing and regulation of oil and gas pipeline welding residual stress.
徐春廣，王俊峰，宋劍峰，田海兵，藺廉普，饒心. 油氣管道焊接殘余應力超聲無損檢測與原位調控技術[J]. 石油科學通報, 2016, 1(3): 442-449. XU Chunguang, WANG Junfeng, SONG Jianfeng, TIAN Haibing, LIN Lianpo, RAO Xin. Ultrasonic nondestructive testing and in situ regulation technology of residual stress for oil and gas pipelines. 石油科學通報, 2016, 1(3): 442-449.
