1) Isolated the fuel gas pipeline from the gas forwarding skid for GT11 & GT12 and purging with nitrogen gas was done to remove the remaining fuel gas inside the pipes.
2) Tested the air quality and checked the oxygen level in the GT12 combustion chamber manhole. The Lower Explosive Limits (LEL) was also identified to check the presence of any explosive gases.
3) Preservation of the Auxiliary Boiler was done to preserve the auxiliary boiler from corrosion attack. Purging with nitrogen gas, which is a chemically inert gas, is done to remove oxygen.
4) Entered inside the GT12 exhaust diffuser and the bypass stack. Witnessed the GT12 minor inspection.
5) Replaced the solenoid valve for the steam turbine's bypass control valve.
6) Watched the opening of the Inlet Guide Vanes inside the GT12 air intake. This is done to control the air mass flow into the compressor.
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