西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (4): 157-164.DOI: 10.3863/j.issn.1674 – 5086.2011.04.030
• 石油机械工程及其他 • Previous Articles Next Articles
JIAO Zhong-liang, SHUAI Jian
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Abstract: The depth-based evaluation criteria have not been able to meet the engineering requirement concerningthe pipeline stress concentration caused by dent, so this paper proposes strain-based evaluation procedure composedof inline detection, noise treatment, geometric interpolation, and strain calculation. Plain dent has little influence onpipelineresidualstrength, butitmayacceleratepipelinefracturefailurewhencombinedwithweld, crack, scratches,and other defaults. The elastic-plastic fracture theory can be used for the strength evaluation, but when the dent isnear a weld, it must be repaired or replaced. Unconstrained dent faces the fatigue problem when internal pressurefluctuate. The fatigue life and maintenance period are predicted based on rainflow method and fatigue damagecumulative rule. According to the analysis and comparison of main standards and rules, this paper proposes acompletely integrity assessment system of pipeline dents.
Key words: pipeline dent, strain calculation, residual strength, fatigue life, integrity assessment
CLC Number:
TE832
JIAO Zhong-liang;SHUAI Jian. Integrity Assessment of Pipeline with Dents[J]. 西南石油大学学报(自然科学版), 2011, 33(4): 157-164.
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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.3863/j.issn.1674 – 5086.2011.04.030
http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2011/V33/I4/157