8NACE Standard RP0502-2002,Pipeline External Corrosion Direct Assessment Methodology[S] .
9NACE Standard RP0102-2002,Standard Recommended Practice In-line Inspections[S].
10Demma A,Cawley P,Lowe M. The Reflection of Guide Waves from Notches in Pipes: a Guide for Interpreting Corrosion Measurements[J]. NDT&E International, 2004, 37 (4): 167-180.
