The mother tubes, which have been re-heated and descaled using a water blast, are deformed in a stretch-reducing mill with 28 stands, until they have the final desired diameter and wall thickness. Various controls ensure optimal yield of the mother tube and that the required tolerances are met. The wall thickness of the resulting tubes is checked along the entire length using radiometric equipment. The results of these inspections are output graphically and documented. Following cooling on 90-meter-long rake type cooling beds, the ends are cropped and the tubes are cut into processing lengths.
|drives / drive power||1 AC motor / 5,096 h.p.
1 DC motor / 1,207 h.p.
1 DC motor / 201 h.p.
|max. infeed speed hollow||3.9 ft/sec|
|max. outfeed speed||27.2 ft/sec|
|max. number of stands||28|
|max. length of outgoing tube||525 ft (160 m)|
Radiometric Wall Thickness Inspection
|type||isotope measuring system|
Rake-Type Cooling Bed
|length||90 m (295 ft)|
|width||20 m (66 ft)|
|type||two-super-speed steel cold saws with carbon saw blades|
|blade diameter||1360 mm (4.5 ft)|
|layer width||900 mm (3.0 ft)|
Depending on specification material is further processed in the OCTG Processing Plant or the Boiler Tube Plant. For information about these procedures, please click on one of the "go to-" Buttons below.