Abstract: A template for taking erosion/corrosion measurements of a piping system for logging a history of the piping system over time using a method which comprises the steps of: (a) Wrapping a template about the pipe component; (b) Aligning the template with a reference marking on the pipe component; (c) Taking a wall thickness measurement at each of the spaced holes; (d) Recording at least the wall thickness measurement at each of the spaced holes and the indicia of the spaced hole location. The template extends circumferentially about the pipe component and has a plurality of spaced holes arranged in a grid pattern which holes extend through the template for receiving a probe for measuring wall thickness of the pipe component. The template has indicia for identifying each of the spaced holes.