Uptower welding repair of stress cracks in a wind turbine bed frame, with NDT before and after repair, milling, WPS-based welding, grinding, inspection and technical documentation.
Cracks in a wind turbine bed frame are a serious issue because they can affect the structural stiffness of the nacelle. If the damage develops, it may increase the risk of drivetrain alignment issues, place additional stress on surrounding components and lead to longer downtime.
The scope of work included uptower welding repair of stress cracks in the bed frame of a wind turbine.
NDT was carried out before the repair to verify whether the cracks had developed further in relation to the agreed repair scope. The damaged area was milled, welded in accordance with a task-specific WPS and ground after the welding work was completed.
After the repair, the area was inspected using LPT and documented with photographs, inspection points and technical documentation.
