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Title: A review of the role and effect of residual stress on pipeline-flaw assessment
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Catalog No.: 2335s
Date of Publication: 2014-12-01
Price: $25.00 US
Authors: Sultan Salim Al-Owaisi, Prof. Adib Becker, and Prof. Wei Sun
Abstract: RESIDUAL STRESSES ARE generated in steel pipelines as a result of three main processes: one is metallurgical variations which occur during steel making and partly during welding, another is micro-structurally and mechanical changes introduced during forming and manufacturing, and the last is related to construction activities at site. Compressive residual stresses are normally beneficial to the structural integrity of pipelines as they tend to limit crack propagation; however, tensile residual stresses have adverse effects on the initiation and development of flaws in pipelines. Research results dealing with the effect of residual stresses on pipeline flaws away from the girth weld and the magnitudes of residual stresses are rare to obtain. The purpose of this review paper is to build-on the knowledge accumulated to-date on residual stresses to evaluate their effects on structural integrity of pipes with stress-corrosion flaws, since there many advances have been made in the measurement techniques of residual stresses and the use of finite-element methods to obtain residual-stress data.
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