Prediction of the burst pressure for defective pipelines using different semi-empirical models

Frattura ed Integrità Strutturale

关键词: burst pressure;    metallic pipelines;    remaining strength;    pipeline corrosion;    empirical model;    corroded pipeline;   

DOI  :  10.3221/IGF-ESIS.52.12

来源: DOAJ

【 摘 要 】

The main aim of this work is to predict the theoretical burst pressure of defective pipelines using different semi-empirical models and compare them with the hydrostatic test results. A new methodology was formulated with accounting for a minimum thickness (weakest section of the pipe) over the length of the pipe to predict the most conservative burst pressure. With a simple analytical expression, a reasonable accuracy and more conservative burst pressure can be obtained for any arbitrary defect shapes. A variation of burst pressure was found between theoretical prediction and hydrostatic burst test results with respect to the different semi-empirical models even for the same corroded defects. Different defect geometry shape and pipe material conditions are the possible causes for variation in the burst pressure between the semi-empirical models, so a careful selection of these parameters is necessary. The proposed methodology predicted a more conservative burst pressure for all arbitrary defects shapes and can predict reasonably accurate values if it accounts for the axial stress.

【 授权许可】

Unknown