PRÜFTECHNIK NDT GmbH: Welding lines with annealing units

Nondestructive testing

Tube applications

Welding lines with annealing units

The EDDYSENSOR detects holes in the weld seam and sends a signal to shut off cooling water

		Reduces scrap: Prevents water or gas from leaking through weld seam hole into interior of tube
		Reduces danger of explosions: Recognizes weld seam holes and signals annealing unit to pump argon instead of hydrogen
		Reduces downtime: Maintenance work is limited by preventing water or hydrogen from entering the tube interior

Operators of welding lines with annealing units have always had to wrestle with the problem of holes in the seam weld. Any cooling water or gas that leaks through the holes into the tube interior can result in faulty production. The PRUFTECHNIK solution identifies the holes, automatically shutting down the cooling water and thereby reducing scrap production. The danger of explosion due to hydrogen seepage into the tube interior is avoided by pumping argon into the annealing unit when a hole is detected by the EDDYSENSOR.

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01/21/00