For thermal stress relief for heavy welded structures we use roller-hearth chamber furnace with guillotine door, heated with CH4. The inner size is 12.000 mm length, 6.000 mm width and 5.500 mm height, and the hearth measures 6.000 mm X 12.000 mm. For heating we use natural gas 8.500 kcal/Nmc.

 

Maximum heathing speed: 80°C
Temperature: 500 – 700 °C +/- 15 °C
Controlled cooling speed: max. 50 °C
Temperature uniformity on part: +/- 10 °C
Number of burners: 28