To provide a pie member allowing user to easily identify a removed state of an oxide film and an unremoved state of the same.

A pipe body 11 has an inner layer part 22 including an inner surface 11c of the pipe body 11, and an outer layer part 21 arranged on a surface 22a of the inner layer part and including a surface 11b of the pipe body 11. A thickness dimension of the outer layer part 21 is set in the size of removing the outer layer part 21 together with the oxide film 20 when shaving off the oxide film 20 formed on at least the surface 11b, and identification processing for allowing the user to identify the outer layer part 21 and the inner layer part 22, is applied to at least one of the outer layer part 21 and the inner layer part 22.