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Safety Inspection Before C3-3.43/0.49 Steam Turbine is Started

1. Carefully check the steam turbine, generator and various auxiliaries to determine that the installation or maintenance is over. 

2. Prepare each kind of tools and make good connection among main control room, boiler and electrical equipment.

3. Inspection on oil system mainly includes the following: 

(1) All the equipment inside oil pipe line and oil system shall be in good condition and the oil system shall be free of oil leakage phenomenon. 

(2) The oil level in oil tank is normal, the oil quality is good and the buoy of oil level indicator can flexibly act. 

(3) The oil draining valves of oil tank and oil -cooler are closed tightly. 

(4) The oil inlet/outlet valve of oil cooler is normal, and the measures against misoperation are available, and inlet/outlet oil valve of the standby oil is closed. 

(5) The inlet/outlet valve of electric oil pump valve is open. 

(6)While the pipelines are cleaned, washing line in each bearing and before the mesh or blocking plate temporarily equipped before each bearing must be dismantled. 

4. Inspection on steam-water system: 

(1) The electric isolation valve on the main steam pipeline shall be manually and electrically inspected in advance.

(2)The isolation valve, main steam valve, extraction non-return valve, direct draining valve, and corrosion-proof valve on the main steam pipeline and extraction pipeline, and the direct draining valve on the cylinder is opened. The valves that can affect the vacuum when they are started and the valves that the steam and water can back to the cylinder shall be closed. 

(3) The valves on the steam- sealing pipe to the "steam-sealing heater" is opened and the draining valve on the steam-sealing heater is opened( pressure-equalizing tank).

(4) The steam lines shall be able to expand freely. 

(5) The main valve of cooling water for oil cooler is opened, the water intake valve of the oil cooler is closed, and the water outlet valve is opened. 

(6)The steam valve on steam pipeline of steam turbine oil pump is closed; the steam exhaust valve and water draining valve of steam turbine oil pump is opened. 

5. Inspection on regulating and safety system: 

(1) Assembly of the regulator and air -regulating valve .

(2)Lubrication on each rotating point on the connecting rod of the air-regulating valve. 

(3) Check whether the steam pulse room of the regulator is filled with distilled water. 

(4) Check whether the safety devices are Off position. 

6. Check the slide pin system, measure each gap size in cold state and record the test results. If there is sliding groove on mount, the sliding groove shall be lubricated. 

7. Check all the instrument, thermometers, light plates, contact signals, etc., and all the security devices. 

8. The valves on the pulse tube to each instrument is opened. 

9. After the above mentioned inspection is finished, inform the boiler operator to supply steam and warm up the pipe.  


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