Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for subject:(Circumferential welding support). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


NSYSU

1. Chen , You-Ren. Quantitative Evaluation of Defects on Supports of Pipeline Using Magnetostrictive EMAT.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2016, NSYSU

Nowadays, pipeline systems has been extensively used in energy, petrochemical and even the livelihood industries to transport raw materials or products rapidly and safely. However, the recent report shows that industrial issues due to failure of the pipes rupture became the main sources of economic losses in factory. The interfaces between the supports and pipe are prime locations for corrosion to occur, as the interfaces can trap water or contaminants and are inherently difficult to inspect as the corrosion is often hidden by the support interface. Also, because the variety types of pipe support, there has no method can generally apply on every cases currently, and the inspections most rely on manual visual to assess. Among the non-destructive testing techniques, guided waves has the ability to detect the section where pipe support mounted, precluding the restrictions caused by in-situ condition. According to previous researches, the common long-range guided wave is strongly affected by pipe support, which made these area be a dead zone. This study provides simple support, clamp support, circumferential welding and longitudinal welding support as samples to evaluate the inspecting efficiency of SH0 mode magnetostrictive EMATï¼Electromagnetive Acoustic Transducerï¼, which can only be utilized in certain range. It shows this middle-range high frequency guide wave can successfully separate defect signal and significant reflection of supports. Also, by comparing original reflection signal of supports, we discovered the differences of reflection characteristics when the welding points after adding artificial defects, and obtained less than 10% depth quantitative error of these artificial defects created in pipe support region. It can be observed the SH0 middle-range high frequency guide wave technique not only wonât affected by clamp support, but also has good ability to detect the defect in the interior of the circumferential welding support. The results obtained from this study can be a reference or information for companies in practical use and further developed a standard procedure for inspecting pipeline support region. Advisors/Committee Members: Bor-Tsuen Wang (chair), Jin-Jhy Jeng (chair), Jyin-Wen Cheng (chair), S. Y. Hsia (chair), Yang, Shiuh-Kuang (committee member).

Subjects/Keywords: Simple support; Clamp support; SH0 mode; Magnetostrictive EMAT; Circumferential welding support; Longitudinal welding support; Pipeline systems

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Chen , Y. (2016). Quantitative Evaluation of Defects on Supports of Pipeline Using Magnetostrictive EMAT. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0224116-155842

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Chen , You-Ren. “Quantitative Evaluation of Defects on Supports of Pipeline Using Magnetostrictive EMAT.” 2016. Thesis, NSYSU. Accessed October 29, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0224116-155842.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Chen , You-Ren. “Quantitative Evaluation of Defects on Supports of Pipeline Using Magnetostrictive EMAT.” 2016. Web. 29 Oct 2020.

Vancouver:

Chen Y. Quantitative Evaluation of Defects on Supports of Pipeline Using Magnetostrictive EMAT. [Internet] [Thesis]. NSYSU; 2016. [cited 2020 Oct 29]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0224116-155842.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen Y. Quantitative Evaluation of Defects on Supports of Pipeline Using Magnetostrictive EMAT. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0224116-155842

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.