MAC’s First Multiplexed UT Rotary System Successfully Installed

June 16, 2011

MAC’s new multiplex 180 mm Echomac® ultrasonic rotary system was recently installed in a Russian plant that produces oil country tubular goods (OCTG).  The unit is part of a test station that inspects welded ERW line pipe and casing tube up to 168 mm diameter and 7.5 mm wall thickness for lamination, wall thickness, and transverse/longitudinal defects.

Responding to the need for more test channels to detect smaller and smaller defects without sacrificing speed, Magnetic Analysis Corp. engineers developed a new multiplexed ultrasonic transducer design for the way transducers send and receive signals. MAC’s new multiplex 180 mm Echomac® ultrasonic rotary system was recently installed in a Russian plant that produces oil country tubular goods (OCTG).  The unit is part of a test station that inspects welded ERW line pipe and casing tube up to 168 mm diameter and 7.5 mm wall thickness for lamination, wall thickness, and transverse/longitudinal defects. Using the new, fully multiplexed 32 transducer elements that feed 20 channels, results were excellent even when testing to 5% threshold, meeting API standards.

MAC’s ultrasonic unit is mounted on a Triple Drive Roll Bench installed as part of the customer’s in-line test system. MAC’s bench provides constant centering which reduces vibrations and allows for leading and trailing upset ends to be accommodated. The entire plant’s production passes the test station which has integrated the MAC ultrasonic system with an existing magnetic flux leakage test unit.  MAC’s bench was synchronized with the customer’s conveyor test speed, height, and logic controls. A new multi-collector computer receives data from all testing stations and presents a single traceable report for each tube.  The multiplex feature will also be extended to other ultrasonic rotaries in MAC’s product line.  MAC also offers flux leakage and eddy current systems for testing tube, bar, wire, and parts. For more information, email info@mac-ndt.com.