Burst tests using straight pipes of carbon steel for high-temperature use with artificial wall-thinning were conducted under internal pressure. Then, three-dimensional elastic-plastic finite element analyses (FEA) was conducted. The validity of the analyses was confirmed by comparing it with the experimental results. Through FEA for various pipe configurations as well as length and depth of the wall-thinning, it was revealed that the influence of the length of the wall-thinning on the failure pressure can be normalized by pipe radius. The failure pressure exhibited dependency on stress-strain relation, and the results obtained from line pipe steel and carbon steel was almost identical, while the stainless steel showed better durability. It was concluded that assessment criteria developed for line pipe steel pipes can be applied for carbon steel and stainless steel pipes conservatively.
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