Detection of anomalous stresses in gas pipelines by magnetometer survey (invited)
Pipelines constructed on unstable terrain (e.g., permafrost), submarine lines, etc. may shift, producing stresses which can lead ultimately to rupture. We have used magnetometer surveys to detect bending stresses in buried pipelines and to monitor new construction. The perturbations to the earth’s f...
Published in: | Journal of Applied Physics |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
AIP Publishing
1982
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1063/1.330316 https://pubs.aip.org/aip/jap/article-pdf/53/11/8130/7974548/8130_1_online.pdf |
id |
craippubl:10.1063/1.330316 |
---|---|
record_format |
openpolar |
spelling |
craippubl:10.1063/1.330316 2024-02-11T10:07:53+01:00 Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) Atherton, David L. Teitsma, A. 1982 http://dx.doi.org/10.1063/1.330316 https://pubs.aip.org/aip/jap/article-pdf/53/11/8130/7974548/8130_1_online.pdf en eng AIP Publishing Journal of Applied Physics volume 53, issue 11, page 8130-8135 ISSN 0021-8979 1089-7550 General Physics and Astronomy journal-article 1982 craippubl https://doi.org/10.1063/1.330316 2024-01-26T09:46:33Z Pipelines constructed on unstable terrain (e.g., permafrost), submarine lines, etc. may shift, producing stresses which can lead ultimately to rupture. We have used magnetometer surveys to detect bending stresses in buried pipelines and to monitor new construction. The perturbations to the earth’s field are large and complex; typically fluctuations of 5–10 kilogamma are found 2 m above 1 m diameter buried line. These signals record initial magnetisations, joints, construction history, etc. and include the results of stress induced magnetisation changes. The magnetostrictive effect in steel depends on field, stress, and cyclic history. There is little basic data on the inverse effect, stress induced changes in magnetization. In a pipeline the bending stress distribution is complex so that fringing field changes due to stress magnetisation changes are not calculable. However, experience now enables us to interpret some of the features of our magnetometer surveys. Since stress effects are large we are optimistic that we can eventually develop the technique for surveying pipelines for unusual stress concentrations. Article in Journal/Newspaper permafrost AIP Publishing Journal of Applied Physics 53 11 8130 8135 |
institution |
Open Polar |
collection |
AIP Publishing |
op_collection_id |
craippubl |
language |
English |
topic |
General Physics and Astronomy |
spellingShingle |
General Physics and Astronomy Atherton, David L. Teitsma, A. Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
topic_facet |
General Physics and Astronomy |
description |
Pipelines constructed on unstable terrain (e.g., permafrost), submarine lines, etc. may shift, producing stresses which can lead ultimately to rupture. We have used magnetometer surveys to detect bending stresses in buried pipelines and to monitor new construction. The perturbations to the earth’s field are large and complex; typically fluctuations of 5–10 kilogamma are found 2 m above 1 m diameter buried line. These signals record initial magnetisations, joints, construction history, etc. and include the results of stress induced magnetisation changes. The magnetostrictive effect in steel depends on field, stress, and cyclic history. There is little basic data on the inverse effect, stress induced changes in magnetization. In a pipeline the bending stress distribution is complex so that fringing field changes due to stress magnetisation changes are not calculable. However, experience now enables us to interpret some of the features of our magnetometer surveys. Since stress effects are large we are optimistic that we can eventually develop the technique for surveying pipelines for unusual stress concentrations. |
format |
Article in Journal/Newspaper |
author |
Atherton, David L. Teitsma, A. |
author_facet |
Atherton, David L. Teitsma, A. |
author_sort |
Atherton, David L. |
title |
Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
title_short |
Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
title_full |
Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
title_fullStr |
Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
title_full_unstemmed |
Detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
title_sort |
detection of anomalous stresses in gas pipelines by magnetometer survey (invited) |
publisher |
AIP Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1063/1.330316 https://pubs.aip.org/aip/jap/article-pdf/53/11/8130/7974548/8130_1_online.pdf |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Journal of Applied Physics volume 53, issue 11, page 8130-8135 ISSN 0021-8979 1089-7550 |
op_doi |
https://doi.org/10.1063/1.330316 |
container_title |
Journal of Applied Physics |
container_volume |
53 |
container_issue |
11 |
container_start_page |
8130 |
op_container_end_page |
8135 |
_version_ |
1790606717899243520 |