Case Study: Hydroelectric Field Machining Project
Hydroelectric Field Machining Project – New Turbine Installations
Furmanite was recently hired to perform in situ machining on the new construction of a three turbine hydroelectric generation power plant installation on the Ohio River. The power plant houses three horizontal 29.3-MW bulb-type turbine and generating units with an estimated total rated capacity of 88 MW at a gross head of 25 feet.
The Stay Cone flanges and associated mating parts were manufactured and machined in the OEM’s workshop facilities and transported to the site. Due to the size, configuration, mechanical handling, transportation complexity and installation limitations, and the final machined finishes required, on-site machining was required to correct alignment of the enormous mating surfaces. Furmanite’s Integrated Mechanical Services Division, a worldwide leader in large dimension field machining, was hired for the in-situ field machining of the Stay Cone Vertical Flanges on all three bulb turbine units to complete the final required 3mm to 5mm of stock removal in the mating flange faces. The massive flanges measure 17ft inside diameter x 19ft outside diameter.