HeliSonic is a rotating tube ultrasonic inspection system. It uses ultrasonic “Pulse-Echo Technique” with the water jet or immersion coupling, depending on the circumference of the tube. The system can accommodate up to 24 or beyond with probes oriented to test along the longitudinal direction - both in clockwise, as well as in counterclockwise direction. It can also accommodate for probes oriented to test along the transverse direction both in forward, as well as the reverse direction of tube travel. Additional channels for probes oriented in the normal direction (probes) to tube surface for measurement of wall / Lamination defects. A test mechanics installed with probes in HeliSonic provides for testing of tubes from the surface to the ID of tubes. The system uses an advanced ultrasonic system with integrated high-end electronics processes the echo signals received by the probes. For calibration and checking purposes, an A-Scan display of each active transducer is displayed on an LCD monitor. The echoes are evaluated using transit time gates and amplitude comparison at thresholds; they are marked on the surface of the tube. The tubes can be classified as “Prime"; "Cutback"; "Scrap"; "Untested". The flaw results are marked within a range of true defect location with paint on the tube surface. The test results are recorded on a hard disk and can be printed out after the test by a printer.