The thickness of a material's wall as determined through direct measurement using appropriate tools and techniques. It is an important parameter to assess the structural integrityThe capability of a pipeline to perform its intended function safely and reliably throughout its life. It includes a range of factors, including the structural … and dimensional characteristics of a componentAny physical part of the pipeline, other than line pipe, including but not limited to valves, welds, tees, flanges, fittings, taps, branch connections, outlets,….