NDT Standard Radiographic Film Interpretation Reference Set RTFI NDT Standard Radiographic Film Interpretation Reference Set RTFI NDT Standard Radiographic Film Interpretation Reference Set (RTFI) For NDT RTFI Demonstration. Film Set Contains: 12 Radiographs of 25 Flaws plus 6 Processing Defects. Radiographs are of 10 carbon steel specimens as follows: (4) Plates @ 0.375"T (4) Plates @ 0.625"T (1) Tee @ 0.375"T (1) Pipe @ 4" Sch80 (0.337" wall). Documentation: Includes C of C, CAD Drawings, and Test Sheets & Radiographs Film Set. Customized Calibration Test Block and Flaw Specimen also available.