Method for testing of pipeline welds that is superior to the regular NDT non-destructive testing or radiography. AUT inspection utilizes techniques with zoned inspection and time of flight diffraction (ToFD) techniques. The system provides an adequate number of inspection channels and is designed with sufficient beam overlap to ensure the complete volumetric examination of the weld through thickness. The system includes a fully automated recording system to indicate the location of imperfections and the effectiveness of the acoustic coupling. A scribe tool is provided to scribe the band side of pipe ends with a permanent mark completely around the circumference for determining positioning of the scanning band. AUT calibration blocks are designed to permit detection and sizing of indications in conformance with project specific codes and/or standards. A separate calibration block is required for each pipe diameter, thickness and weld bevel configuration. Calibration shall be performed prior to the start of the inspection and/or every time a technique is loaded.