Effect of Boundary Conditions of Failure Pressure Models on Reliability Estimation of Buried Pipelines
This paper presents the effect of boundary conditions of various failure pressure models published for the estimation of failure pressure. Furthermore, this approach is extended to the failure prediction with the help of a failure probability model. The first order Taylor series expansion of the limit state function is used in order to estimate the probability of failure associated with each corrosion defect in buried pipelines for long exposure periods with unit of years. The effects of random variables such as defect depth, pipe diameter, defect length, fluid pressure, corrosion rate, material yield stress, material ultimate tensile strength and pipe thickness on the failure probability of the buried pipelines are systematically investigated for the corrosion pipeline by using an adapted failure probability model and varying failure pressure model.
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
O. S. Lee et al., "Effect of Boundary Conditions of Failure Pressure Models on Reliability Estimation of Buried Pipelines", Key Engineering Materials, Vols. 261-263, pp. 803-808, 2004