Mannesmann Aktiengesellschaft

Krautkrämer Gmbh & Co.

Krautkramer Gmbh

Reinhard Pawelletz

Reinhard Prause

Karl Ries

Heinz Schneider

Ottokar Patzke

Harri Haacke

Harry Kuhn

Bernhard Harbach

Herbert Vogt

Werner Grabendorfer

Whole-body test system with a test probe mount designed especially as a

In electromagnetic testing method for tubes is disclosed, which is used during continuous production of tubing from strip being formed into a tube followed by welding the adjoining edges. A magnetic field is applied from the outside, possibly being a field accompanying the welding process, and a pickup transducer is inserted from the tube forming location to scan the interaction of the penetrating field with the tube particularly the seam and adjacent zones.

Method of magnetically testing tubes during welding wherein the same

This invention relates to immersion ultrasonic pulse-echo testing of tubes or bars for internal defects wherein means are provided to continuously monitor the operation of the test channel. As ultrasonic energy enters the workpiece, the round workpiece surface causes acoustic energy scatter responsive echo signals which are sensed by the transmitter probe, are amplified and applied to a threshold circuit. If the amplitude of the scatter responsive signal falls below a predetermined level, an output signal indicative of 'loss of operation' is produced. Means are provided to inhibit such output signal in the event of only a momentary decrease of the scatter responsive signal below a predetermined value.

Method and apparatus for monitoring the operation of ultrasonic testing

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Dusseldorf, Germany

Reinhard Pawelletz