Rotary Hearth Furnance

As a general rule, continuously cast billets with a diameter of 230 millimeters (9 inches) are used as the raw material for seamless pipes. Billet shears cut them into the desired lengths. In the case of alloyed types of steel that cannot be cut using shears, the billets are removed from the production line and cut up using a carbide-tipped saw. The cut-to-length billets are then heated in a rotary hearth furnace to a deformation temperature of about 1280° C (2336 ° F).

voestalpine Tubulars gets the billets for manufacturing pipes and tubes from a related voestalpine company in Donawitz (Austria), which is one of the world’s technologically most advanced steel plants.

Billet Storage

Technical data

storage capacity max. 30.000 t
storage type stanchion warehouse

 

Preheating Furnance

Technical data

process temperature 850°C (1,562°F)
max. capacity 108 t/hr

 

Carbide Layer Saws

Technical data

manufacturer FRAMAG
type carbide circular saw
number of saws 2
layer width 900 mm (2.95 ft)
blade diameter 1,370 mm (4.49 ft)

 

Carbide Billet Saw

Technical Data

manufacturer LINSINGER
type vertical circular saw with carbide blades
main spindle drive 80 kW AC-servo
sequence time of billets 28 sec

 

Billet Shears

Technical data

manufacturer LINDEMANN
type mechanical shears with eccentric shaft
drive three-phase motor, 335 h.p.
shearing force 40 MN (9,000 kpf)
sequence time of billets 15 sec

 

Rotary Hearth Furnance

Technical data

manufacturer UNIVERSALE
capacity 110 t/hr
firing natural gas
temperature control computer-controlled
average diameter of hearth 24.500 mm (80.4 ft)
width of hearth 4.100 mm (13.5 ft)
heating zones 7
firing 34 regeneratives burners, 33 conventional burners