Abstract: To overcome the problems of corroded pipeline residual life prediction, such as complexity, bad prediction effect of tradition time, fuse the GRA, FOA and ELM to build the residual life prediction model of corroded pipeline. Calculate the correlation degree of pipeline residual life and corroded factors, choose factors with high correlation degree, and lower the complexity of prediction. Use FOA to optimize the hidden layer threshold and input layer weight of ELM, and then predict the residual life of corroded pipeline. Using the corroded data of water injection pipeline as an example, results showed that, comparing to BP and ELM model, the prediction accuracy and generalization performance of GRA-FOA-ELM all improve, which can provide new idea for pipeline corrosion study.

Key words: corroded pipeline, residual life, GRA, FOA, ELM, emergency management