Push Bench

Using a crimping press, the pierced hollow shells are attached to the end of the mandrel bars and then deformed to create the mother tubes. This is accomplished on the push bench: The mandrel bars are pushed through a stand of three-roll cages, which have decreasing cross section. As a result, the hollow shells are elongated over the mandrel bars to form a tube up to 17 times longer than its original length. After the mother tubes have been formed, the mandrel bars, which are still inside the tubes, are removed. The wall thickness of the mother tubes is checked along the entire length using radiometric-measuring equipment. The tubes are then placed in the re-heating furnace.

Crimping Press

Technical data

manufacturer: MANNESMANN-DEMAG-MEER
type: Three-jaw press (hydraulic, via lever system)
press load: 900 KN (100 tons)

 

Push Bench

Technical data

manufacturer: MANNESMANN-DEMAG-MEER
drive 2 DC motors
driving power 2 x 2,816 h.p.
max. push speed: 6.6 m/sec (21.7 ft/sec)
max. push load 120 t
max. length of the hollow: 22.7 m (74.5 ft)
max. elongation 17 times

 

Roller Breakage Control

Technical data

manufacturer: ARC Seibersdorf
recorder type CCD line camera
data size 600 Mb/hollow

 

Reeler

Technical data

manufacturer SMS MEER
drive 2 three-phase  motors
number of rolls 4
max. rolling speed 108 m/min (354 ft/min)
drive power 2 x 390 h.p.

 

Radiometric Wall Thickness Control

Technical data

manufacturer: IMS
type: 9-channel isotope measuring system