The present disclosure provides an anti-corrosion automatic wrapping device and method for a bend pipe with a polyethylene composite tape, including a wrapping machine, a plurality of sets of bend pipe conveying structures, a fixed base, a rotating ring, a sliding block, a first arc-shaped pipe, a connecting shaft, and a blocking member. The blocking member is disposed on a same side of the sliding block as the first arc-shaped pipe and connected to the sliding block, wherein when the sliding block slides into the bend pipe, the blocking member is configured to abut against an end face of one end of the bend pipe When the bend pipe supported by the plurality of sets of bend pipe conveying structures is conveyed through the wrapping machine, the bend pipe can push the blocking member to move.

A system and methods for monitoring internal corrosion in a compromised pipe are provided. An exemplary includes applying a reinforcement layer on an outer surface of a pipe over a defect detected in an internal surface of the pipe. A testing fiber Bragg grating (FBG) detector is mounted on the outer surface of the pipe over the defect. A reference FBG detector is mounted on the outer surface of the pipe. A difference in hoop strain between the testing FBG detector and the reference FBG detector is monitored to identify variations in wall thickness over the defect.