Fatigue Crack Growth Behavior in Girth Weld of Natural Gas Transmission Pipelines
A clear understanding of fatigue properties for the pipeline steel and its weld is important to provide information for pipeline design during pipeline construction and predict pipeline fatigue life during pipeline operation. The materials used in this study are API 5L X65 pipeline steel generally used for natural gas transmission. This pipeline was welded by gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW) with V-groove configuration. The fatigue crack growth behaviors of pipeline steel and its girth weld according to crack growth directions and stress ratios were investigated over a wide range of stress intensities in laboratory air.
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Y. P. Kim et al., "Fatigue Crack Growth Behavior in Girth Weld of Natural Gas Transmission Pipelines", Key Engineering Materials, Vols. 345-346, pp. 303-306, 2007