The Residual Resource Assessment of a Oil Pipeline With a Surface Defect under the Load and Environmental Factors

Keywords

oil pipeline, degradation, energy approach, two-frequency loading, crack opening function

Abstract

The authors proposed a mathematical model for estimating the timespan life of an oil pipeline with a surface semi-elliptical microcrack under the turbulent flow of oil in a soil-corrosive environment, which leads to the degradation of the pipe material. A two-frequency load models the effect of the turbulent flow of oil on the pipe wall. The energy basis approach is helping to obtain a nonlinear differential equation with respect to the function of crack opening in the refracture zone with variable coefficients. The equation and the initial and final conditions of crack propagation constitute a mathematical model for determining the residual life of the pipe. The remaining service life of the oil pipeline made of X70 steel was estimated.

References

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