Thickness Profile Estimation of Fluid-Carrying Non-Metallic Pipes

In oil, gas, transportation, and construction industries non-metallic pipes are rapidly replacing metallic pipes. Thus, it is crucial to have a reliable and robust nondestructive testing (NDT) technique to monitor the variation in the thickness profile of such pipes. Here, we propose a technique based on the near-field microwave holography and standardized minimum norm (SMN) to reconstruct the thickness profile of these pipes. We will also identify the fluid carried within the pipe which improves the thickness profile estimation process. The proposed methods are validated via simulation and experimental results.