Cırcotech welding system provides opportunity to weld big tanks such as petroleum and gas, petrochemistry, nuclear power plant through submerged arc welding machine.    *Thıs mactine that has feature to weld through submerged arc welding unit has following specs.    *Welding sped can be adjusted between 0-100 cm/min.It has two different model options as single and double so that it may perform internal and external welding.    *It takes 220 voltage from electric board so it provides to be used required tools and equipments.It keeps operator from natural affects.It can be transported easily due to disassembling feature.     Mobile control panel that strength operator welding ability,    *Minimum tank diameter   :6000 mm    *Tank sheet thickness        :8 mm - 40 mm    *Height setting                      :1300 mm - 2200 mm