Residual Strength Calculation & Residual Life Prediction of General Corrosion Pipeline

General corrosion is of the primary reason that causes the pipeline to failure. Researching the residual strength and residual life of general corrosion pipeline is the main measure to conduct the pipeline integrity management, and has great significance to ensure the safety of pipeline transportation. The calculation of the residual strength of even corrosion pipeline under the combined effects of internal pressure and axial force was discussed according to the Tresca yield criterion in elasto-plastic fault mechanics, when the defected size is given, the maximum permissible operating pressure under the defect and the calculation formula for the residual strength of corrosion pipeline are given. On this basis, reliability-based residual life prediction of the corrosion pipeline was developed.