Roller-hearth furnace for annealing of tubes from special steels in 100% hydrogen atmosphere

1. N2  and  H2  supply

• tube length 40 m (modification from the original 18 m)
• tube made from austenitic and duplex steels 
• tube diameter 12 to 76 mm
• tube length 8 to 40 m
• max. temperature in the furnace 1,180 °C
• furnace atmosphere - 100% H2
• capacity 2,000 kg / hr
• furnace roller conveyor rate 15 to 120 m/hr
• outlet roller conveyor rate 2,400 m/hr
• furnace effective width 790 mm
• furnace roller conveyor load at  1,100 °C  approx. 120 kg /1 m
• line total length 197 m
• Siemens Simatic S7 control system

2. Furnace outlet with transverse transport and with exhaust of the furnace atmosphere residuals