Experiments and evaluation on residual strength of X52 steel pipe with various internal defects
The strength of the natural gas transmission pipe is reduced due to sag deformation and corrosion defects. However, there are rare experiment data to quantitatively describe the effect of the defect’s size and position on the pipe strength. This paper designed seven groups of steel pipes with variou...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2022.1046900/full |
| _version_ | 1797955435608670208 |
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| author | Changchao Qi Tang Li Chang Liu Jian Gao Xinjie Du Qingyang Ren Wenlong Jia |
| author_facet | Changchao Qi Tang Li Chang Liu Jian Gao Xinjie Du Qingyang Ren Wenlong Jia |
| author_sort | Changchao Qi |
| collection | DOAJ |
| description | The strength of the natural gas transmission pipe is reduced due to sag deformation and corrosion defects. However, there are rare experiment data to quantitatively describe the effect of the defect’s size and position on the pipe strength. This paper designed seven groups of steel pipes with various defects to perform the hydrostatic bursting experiments, and to research the effects of the defects on the strength of the steel pipe. The experimental pipe sample is selected as the X52 material. Three types of defects were set up: concave and corrosion combinational defects, one corrosion defect, and two corrosion defects. The pipe rupture size, the strain around defects, and pipe perimeters before and after experiments are measured, finally yielding the strain-pressure curve of each steel pipe. Comparisons of experimental results show that the defect depth is the dominant factor affecting the pipe strength. Moreover, results show that the DNV-RP-F101 code tends to yield less distance beyond which two defects will not affect each other. The ASME B31G code also tends to give a lower residual strength of the pipe. However, in comparison with the PCORRC criterion, the ASME B31G formula has higher accuracy for X52 pipes. The average relative deviation between the experimental and calculated corroded pipe strength is 14.87%. |
| first_indexed | 2024-04-10T23:33:09Z |
| format | Article |
| id | doaj.art-a5c972c9bd5845488f929e5fdcbf0703 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-04-10T23:33:09Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-a5c972c9bd5845488f929e5fdcbf07032023-01-12T04:24:51ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-01-011010.3389/fenrg.2022.10469001046900Experiments and evaluation on residual strength of X52 steel pipe with various internal defectsChangchao Qi0Tang Li1Chang Liu2Jian Gao3Xinjie Du4Qingyang Ren5Wenlong Jia6PetroChina Southwest Oil & Gasfield Company Safety, Environment & Technology Supervision Research Institute, Chengdu, Sichuan, ChinaMaterials Branch of Sichuan Huayou Group Co., Ltd., Chengdu, ChinaPetroChina Southwest Oil & Gasfield Company Safety, Environment & Technology Supervision Research Institute, Chengdu, Sichuan, ChinaPetroChina Southwest Oil & Gasfield Company Safety, Environment & Technology Supervision Research Institute, Chengdu, Sichuan, ChinaPetroChina Southwest Oil & Gasfield Company Safety, Environment & Technology Supervision Research Institute, Chengdu, Sichuan, ChinaPetroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan, ChinaPetroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan, ChinaThe strength of the natural gas transmission pipe is reduced due to sag deformation and corrosion defects. However, there are rare experiment data to quantitatively describe the effect of the defect’s size and position on the pipe strength. This paper designed seven groups of steel pipes with various defects to perform the hydrostatic bursting experiments, and to research the effects of the defects on the strength of the steel pipe. The experimental pipe sample is selected as the X52 material. Three types of defects were set up: concave and corrosion combinational defects, one corrosion defect, and two corrosion defects. The pipe rupture size, the strain around defects, and pipe perimeters before and after experiments are measured, finally yielding the strain-pressure curve of each steel pipe. Comparisons of experimental results show that the defect depth is the dominant factor affecting the pipe strength. Moreover, results show that the DNV-RP-F101 code tends to yield less distance beyond which two defects will not affect each other. The ASME B31G code also tends to give a lower residual strength of the pipe. However, in comparison with the PCORRC criterion, the ASME B31G formula has higher accuracy for X52 pipes. The average relative deviation between the experimental and calculated corroded pipe strength is 14.87%.https://www.frontiersin.org/articles/10.3389/fenrg.2022.1046900/fullnatural gas pipecorrosion defecthydrostatic bursting experimentstrengthevaluation |
| spellingShingle | Changchao Qi Tang Li Chang Liu Jian Gao Xinjie Du Qingyang Ren Wenlong Jia Experiments and evaluation on residual strength of X52 steel pipe with various internal defects Frontiers in Energy Research natural gas pipe corrosion defect hydrostatic bursting experiment strength evaluation |
| title | Experiments and evaluation on residual strength of X52 steel pipe with various internal defects |
| title_full | Experiments and evaluation on residual strength of X52 steel pipe with various internal defects |
| title_fullStr | Experiments and evaluation on residual strength of X52 steel pipe with various internal defects |
| title_full_unstemmed | Experiments and evaluation on residual strength of X52 steel pipe with various internal defects |
| title_short | Experiments and evaluation on residual strength of X52 steel pipe with various internal defects |
| title_sort | experiments and evaluation on residual strength of x52 steel pipe with various internal defects |
| topic | natural gas pipe corrosion defect hydrostatic bursting experiment strength evaluation |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2022.1046900/full |
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