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D11 Problems & Repair Solutions

D11 Bowed Rotor | D11 Problems & Repairs Solutions

The common GE® D11 steam turbine, a single-casing HP/IP design used extensively in combined cycle applications, is demanding increased focus during normal outages, and ongoing attention for reliability, efficiency, and plant safety. Fundamental reasons are intensified by market-driven calls for continued cycling and low-load operation. Units modified for higher efficiencies and compatibility with 7FA Gas […]

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Diaphragm Dishing Repair

Diaphragm Dishing Repair

Mechanical Dynamics and Analysis inspected and repaired a stage 15 dished diaphragm. The unit was an upgraded 297.5 MW D6 frame unit. The stage 15 diaphragm was found to be dished downstream by approximately 0.215”. MD&A’s Turbine-Generator Repair Facility performed a diaphragm dishing repair to the stage 15 diaphragm by cutting out the old weld, […]

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