The security of pipeline in-service is directly affected by pipeline corrosion degree and leakage.In order to achieve long-term and real-time monitoring of pipeline corrosion and leakage,a fiber Bragg grating strain (FBG) hoop sensor is developed and used to measure the circumferential strain which is caused by the negative pressure wave and the decrease of pipeline wall thickness.To investigate the fe asibility of the proposed method, the corrosion and the leakage simulation experiments are conducted on a PVC pip eline model by installation of fiber Bragg grating strain hoop sensors.Meanwhile,numerical analysis is carri ed out to verify the correctness of the experimental results.The results of the experiment show that the fiber B ragg grating strain hoop sensor can measure the circumferential strain accurately,as well as the negative press ure wave signals induced by pipeline leakage.For the measurement of pipeline wall thickness,the experiment al results agree well with the numerical results.Experimental results demonstrate that the fiber Bragg grating strain hoop sensor is applicable for pipeline corrosion measurement.Simultaneously,this sensor can be used in the pi peline leakage monitoring.