This work describes the repair procedure conducted on the High Pressure/Intermediate Pressure (HP/IP) and generator rotors of a 180 MW steam turbine General Electric (GE) - STAG207FA type D11 installed at La Sierra Thermoelectric Power Plant in Puerto Nare, Colombia. The paper will present examples of overlay, shape and joint welding which is performed during the fabrication and repair of operationally stressed rotors at Siemens Power Generation. In addition to welding processes, applied materials, thermal requirements during welding and post weld heat. Yes, this one was repair welded with a new stub shaft!! Boiler Compound Buildup - SCC Coming ! This rotor was less than 5 years old ! Weld wire? Probably not. Thank You !! Orbital Energy Services is the hydro-electric power generation industry's preferred source for precision on-site machining and welding. Our skilled technicians coupled with our specialized equipment enables us to accommodate any customer requirement, from planned maintenance or modern-ization to. osses due to lost generation. A lubricant supply failure at. The invention relates to a method for welding together rotor shafts and rotor shaft segments (discs), wherein a metal-shielding gas (MSG) narrow gap welding method is used, the welding electrode (3) moving in circulating manner parallel to the shaft surface (22, 23) at a wire-feed speed (v) and.