Table 1: Information on pipes and corrosion.

PipeThickness of pipe (mm)Pit depth (mm)Pit width (mm)Approximate age (year)

135.9 ± 1.61.625 ± 0.5145 ± 3490
235.8 ± 0.82.625 ± 0.4713 ± 1.890
322.5 ± 0.89.1 ± 1.24117.2 ± 18.290