Weak magnetic stress internal detection technology of the long gas and oil pipelines

EasyChair Preprint no. 715

Abstract

 The weak magnetic stress internal detection technology is in the weak magnetic environment also in the geomagnetic field environment. The weak magnetic stress internal detection technology is to detect the stress damage area and the stress damage degree of the member by detecting the weak magnetic signal on the surface of the stress concentration region of the ferromagnetic metal member. Weak magnetic stress internal detection technology of the pipeline can effectively detect the stress concentration regions where the pipeline has not formed macroscopic defects, and advance the pipeline safety alarm time, which makes up for the weaknesses of the traditional magnetic flux leakage internal detection technology. In this paper, the key technologies of the weak magnetic stress internal detection are stated. The detection mechanism, influencing factors and engineering tests of weak magnetic stress detection technology are deeply analyzed. Furthermore, the future development direction of the weak magnetic stress internal detection technology is proposed.

Keyphrases: geomagnetic field, lift-off value, Magnetic Signal, Pipeline inner- detection, stress concentration

@Booklet{EasyChair:715,
  author = {Bin Liu and Xiaorui Yu and Luyao He and Lijian Yang and Yongbin Que},
  title = {Weak magnetic stress internal detection technology of the long gas and oil pipelines},
  howpublished = {EasyChair Preprint no. 715},

  year = {EasyChair, 2019}}