Dhanaprakash Industrial Corporation

Heat Treatment Furnaces

Latest, Strong, Sturdy, PLC/PC Controlled Heating Quenching Technology by Dhanaprakash MN Steel Hardening, SS Solution treatment, Forging, Quenching, Tempering & Normalising. Also available for PWHT (Post Weld Heat Treatment) (N+Q+T & Q+T)


  • Annealing
  • Normalising
  • Hardening
  • Solution Treatment Heating
  • Forge Heating
  • Tempering 
  • Aluminium Solutionising 
  • Stress Relieving
  • Ductile Iron Full Annealing
  • ADI (Austempered Ductile Iron).


Auto cycle control

  • Ramp, Soak, Cool .... 8 Steps Profile
  • 10, 20 Profile Memory
  • Multi Input Multi Output (MIMO)
  • PID Controlling Action.
  • PLC Based programmable controller.
  • One burner, one thermocouple forms one pair as zone, thus multi zone control
  • Digital display for time temperature graph online with USB pen drive for data storage, Wired LAN PC connectivity for real time graph printing
  • Complete Report generation by data logging & Processing (SCADA).



  • High Velocity Short Flame Burner.
  • Direct On/Off pulse firing effect.
  • Smokeless perfect combustion.



  • Calibrated to API, AMS, CQ9, STM, ASME, NORSOK
  • National Traceability (NABL)

The furnaces are calibrated for uniformity as per API 6A Standard (The Temperature Difference Between Highest & Lowest Points at Stabilised Conditions should not be more than 13ºC.)



  • Trolley - movement by geared motor with brake.
  • Door - movement by geared motor with brake, counter weighed,
  • Door Lock Unlock - innovative, pneumatically operated instant latching unlatching for perfect sealing.



  • Strong rigid construction.
  • Heat resistant grade CI castings at door and frame, bogie and furnace interface eliminates warpage.
  • Railway rails for load bearing under temperature.
  • Triple sealing minimising heat losses.



  • High temperature high density ceramic fibre Monolithic Anchored lining.
  • Self-supporting Monolithic Anchored Extended door lining.



  • All fuel fired furnaces are equipped with Recuperator to recover the heat from flue gases by preheating combustion air. By thumb rule a rise of 1500 C in combustion air 7.5% heat is recovered.


PLC control

  • Large furnaces handle high value materials; it is essential to install PLC for operation to avoid manual errors.
  • PLC checks each & every operation prior to loading of materials called booting to ensure air/gas/power etc. are within the specifications & all the sensors are in working condition
  • PLC monitors each & every operation during auto cycle for supply conditions, flue temperatures burner operations any deviation is automatically notified audio visually & through SCADA.
  • PLC keeps event history for the record.


Control Panel

  • Aesthetically powder coated control panel.
  • Electrical switch gears for drives, burners.
  • Status indication and control.
  • Burner sequence controller and flame failure device.
  • Programmable start-up, burner, temperature controlling system.


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Heat Treatment Furnaces - videos


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