procedure for bearing and jack oil intial circulation

7/27/2019 Procedure for Bearing and Jack Oil Intial Circulation

1/11

Station: NTPC- Simhadri BHEL Ref No.PS-DC-186-500-101

NTPC Ref no SIM/ 1/TS/2/101Sheet 1 of 10

Plant area: BOILER

PROCEDURE FOR BEARING AND JACK OIL INTIAL CIRCULATIONSLNO

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

PLANT DETAILS

OBJECTIVE

PROPOSAL

SERVICES REQUIRED

SAFETY PERECAUTIONS

EMERGENCY PROCEDURE

STAE OF THE PLANT

TEST METHOD

COMPLETION CRITERIA

APPENDICES

a. APPENDICES


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Plant area: BOILER

PROCEDURE FOR BEARRING AND JACK OIL INTIAL CIRCULATION

SLNO

1.0

1.1

1.1.1

1.1.2

1.1.3

1.1.4

1.1.5

1.1.6

1.1.7

1.1.8

1.2

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

PLANT DETAILS:

a) BEARING OIL:

AOP 2 Nos. and EOP one No.

Oil Tank to hold the oil.

Coolers 2 Nos to cool the oil, one working and the other standby.

Duplex filter in the oil line to thrust bearing, one for service andthe other is standby.

Throttle to regulate the oil pressure in Lub oil header.

Throttles at the entry to each bearing, to regulate the oil flow tothe bearings.

Connected oil lines from pump to bearings and back to oil tank.

Required instrumentation.

b) JACK OIL:

Jack oil pumps AC 2 Nos.

Jack oil pumps DC 1 No

Relief valves.

Pressure regulating valve

NRVS in lines going to the bearings, with isolating valves.

Required instrumentation.

STATUS

Signatures

NTPC BHEL


3/11



Plant area: BOILER


SLNO

2.0

2.1

3.0

3.1

4.0

4.1

4.2

4.3

4.4

4.5

4.6

5.0

5.1

5.2

OBJECTIVE:

To circulate the Lub oil and Jack Oil in the systems after thecompletion of oil system flushing and adjusting the pressure andflow in the Circuits.

PROPOSAL:

To establish oil flow in lub oil & Jack Oil system at requires

pressure and flow.

SERVICES REQUIRED:

Man power with required tools for attending to any leak, cleaningthe oil filter and to adjust throttles.

Operating personnel to co-ordinate the activities.

Power supply for the pumps.

Lighting arrangement for oil tank and other operating floors.

Portable fire fighting equipments in all the floors.

Centrifuge for clearing the oil.

SAFETY PRECAUTIONS:

Display of Board No cutting / welding at all floors and near OilTank, Oil Coolers etc.

Debris in all the floors shall be removed.

STATUS

Signatures

NTPC BHEL


4/11



Plant area: BOILER


SLNO

6.0

6.1

6.2

6.3

EMERGENCY PROCEDURE:

First Aid kit shall be made available.

The operating personnel shall know well about the procedure ofpump and the system.

They shall be in a postion to intimate to shift incharge incase theyare unable to tackle any eventuvality.

STATUS

Signatures

NTPC BHEL


5/11



Plant area: BOILER


SLNO

7.0

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

7.10

7.11

STATE OF THE PLANT:

All pumps (Aops & Jops) shall be available.

Oil in the tank is filled to the required level

Power supply for the pumps is available

Centrifuge shall be in working condition.

One cooler is valved in on oil side and cooling water side.

Cooling water shall be available.

All bearing are Boxed up.

Any Dummy and temporary line placed during oil flushing areremoved and system normalised.

Filters shall be cleaned.

All indicating instruments local and remote shall be available.

All temporary filters used at the inlet to bearings shall be removedand the throttles shall be installed.

STATUS

Signatures

NTPC BHEL


6/11



Plant area: BOILER


SLNO

8.0

8.1

8.1.1

8.1.2

8.1.3

8.1.4

8.1.5

8.1.6

8.1.7

8.1.8

8.2

8.2.1

8.2.2

8.2.3

METHOD:

a) LUB OIL:

Start DC EOP and fill up the system. While doing this if any leakis noticed, stop the pump and attend to the same.

Once system gets filled up, stop DC EOP and start any one ofAOPs.

Adjust the throttle in the line to maintain the lub oil headerpressure to the required value.

Ensure the flow through the return lines from all the bearings.

Adjust the throttles installed in the lines to individual bearings tomaintain the flow as per the curve.

Put the oil temperature controller on Auto.

Watch the oil level in the tank, if required makeup the level.

Ensure that all local and remote instruments are indicating thecorrect Readings.

b) JACK OIL:

Keep all the isolating valves open near the bearings.

Release the relief valves at the discharge of the pumps.

Release the pressure regulating valve in the header.

STATUS

Signatures

NTPC BHEL


7/11



Plant area: BOILER


SLNO

8.2.4

8.2.5

8.2.6

8.2.7

8.2.8

8.2.9

8.2.10

Valve in the pressure gauges in the entire system.

Start one Jop and adjust the relief valve at its discharge todevelop the required pressure.

Adjust the pressure regulating valve to maintain the requiredheader pressure.

Stop this pump and start the other pump and adjust its discharge

pressure as done before.

Stop the above pump and run DC Jop and set its dischargepressure and stop the same.

Keep dial indicators on the shaft adjusant to all the bearings tocheck the lift.

Start any one of jop and by adjusting the isolating valves providedat the bearing end create the lift of the bearings. The lift shall bebetween 0.02 to 0.1 mm depending up on weight of the rotor.

STATUS

Signatures

NTPC BHEL


8/11



Plant area: BOILER


SLNO

9.0 COMPLETION CRITERIA:

i) Oil initial circulation through the bearing is establishedat the required temperature and pressure.

ii) The lift of all bearings established by running the Jops.

STATUS

Signatures

NTPC BHEL


9/11

SHEET 9 OF 10

10.0 APPENDICES:

LOG SHEET - 1

STATION :UNIT NO :SYSTEM : TURBINE LUB-OIL SYSTEM

DATE/TIME

AOP DIS.PR.Kg/cm2

LUB OILHEADER

PR Kg/cm2

LUB OILTEMP C

OILTANKLEVEL

REMARKS

Signatures

NTPC BHEL


10/11

SHEET 10 OF 10

10.0 APPENDICES:

LOG SHEET - 2

STATION :UNIT NO :SYSTEM : TURBINE JACK OIL SYSTEM

DATE/TIME

JOPDIS. PRKG/CM2

JOPHEADER

PR.KG/CM2

JOB PR. AT BEARINGSREMARKS

Brg.1 Brg 2 Brg 3 Brg 4 Brg 5 Brg 6

Signatures

NTPC BHEL


11/11

PROCEDURE FOR BEARING AND JACK OIL

INTIAL CIRCULATION

procedure for bearing and jack oil intial circulation

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