There are several efforts for an advanced on-line health monitoring of a piping system by
using a chemical condition monitoring, a X-ray radiography and a ultrasonic techniques. In order to
increase the confidence of the understanding on the health condition of the underlying piping system,
an integrated and multi-disciplinary approach has been adopted in this paper. Flow-Accelerated
Corrosion (FAC) under an undesirable combination of the water chemistry, flow velocity and material
composition has usually caused a pipe wall thinning. The condition monitoring tests on a piping
elbow of a piping system have been conducted by using several advanced sensors such as an
accelerometer, ultrasonic device, and chemical sensors.