Flash trimming monitoring on ERW - GE Inspection Technologies - #1

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GE Inspection Technologies Ultrasonics Krautkramer Testing Machines Flash trimming monitoring on ERWðmpipes Monitoring the flash trimming on longitudinal weld seams of ERW-pipes For a user of welding lines for the production of ERW-pipes it is important to see whether the trimming tool, responsible for removal of the inside flash, is working correctly. Using the testing machine which we developed, this monitoring is made directly after welding and not after the tubes have been cut. Therefore this testing machine is primarily a system for monitoring and control of the production process. For flash trimming monitoring: OSK The system operates with an oscillating immersion probe which measures the wall thickness in the area of the weld. As an alternative a phased array system can be used. The advantage of the flash trimming monitoring with phased array is that there is no mechanical movement. Probe switching is done electronically via a time delay. The result is displayed on a monitor as a topographical presentation of the inside tube surface. Irregularities are immediately recognized thus enabling direct process control. Oscillation Probe Water delay Wall Flash trimming monitoring in the production line Test mechanism lowered