Here we report on how two customers fared when they turned to EFD Induction to solve their bolt heating challenges.
British Energy, the largest electricity producer in the UK, utilises induction heating for bolt expansion. Fred Hunter, Development Engineer at British Energy’s Turbine Support Group, comments: “We used to rely upon resistance heaters to release the studs on turbine control valves. But it was a far from efficient procedure. Such technology is inherently unreliable. The electrical elements are fragile, fuses are prone to blowing, and it is essential to have a huge spares inventory on-site. Moreover, such heaters are not mobile. You can imagine the considerable prep-work that was needed before we could deploy the equipment.”