IB Steam Turbine Preservation
Safety: Fall from height. Ensure safe access to fix the hose from a height of 4M.
Ingress of any objects through the 150 mm dia openning.
Enviornmental Issue: Area to be kept neat & clean.
Prerequisits: LIVE PTW in force. PPE in place.
Class: Normal
Knowledge: Process is known & Equipments are identified as per drawing.
Mind Joggers:Turning Gear should not put "OFF" beforeTurbine shaft temp. become < 100 oC
Procedure for line up:
PRESERVATION LINE-UP to be followed
Sl. No. Process name Description of valves Valve Position Confirmation
1 live steam to turbine MOV 11- 61LBA10AA010 / 011 Close
2 live steam to gland MOV 11 - 61MAW10AA010 Close
3 Aux. steam to gland MOV 11 - 61LBG50AA030 Close
4 Live steam stop valves 11 - 61MAA11 / 12AA001 Close
5 Turbine Ex-1 to LP-1 htr. MOV 11 - 61LBS10AA020 Close
6 Turbine Ex-2 to Desal LP steam MOV 11 - 61LBD13AA020 Close
7 Turbine Ex-2 manual Bypass v/v of LBD13AA020 no kks Close
8 Turbine Ex-2 to Desal LP steam MOV 11 - 61LBD14AA001 Close
9 Turbine Ex-2 to LP-2 htr. MOV 11 - 61LBS20AA020 Close
10 Turbine Ex-3 to FWT MOV 11 _ 61LBS30AA015 Close
11 Turbine Ex-3 to FWT MOV 11 _ 61LBS30AA025 Close
IB Steam Turbine Preservation
12 Turbine Ex-4 to HP-1 htr. MOV 11 - 61LBQ40AA015 Close
13 Turbine Ex-4 to HP-1 htr. Manual v/v 11 - 61LBQ40AA025 Close
14 Turbine Ex-5 to HP-2 htr. MOV 11 - 61LBQ50AA020 Close
15 Turbine Ex-5 to Desal MP steam MOV 11 - 61LBD20AA005 Close
16 Turbine Ex-5 to Desal MP steam MOV 11 - 61LBD20AA020 Close
17 Turbine Ex-5 to Desal MP steam MOV 11 - 61LBD20AA023 Close
18 Condenser Vac. Breakers (full) 11 - 61MAX59AA001 Close
19 Condenser Vac. Breakers (partial) by IMD 11 - 61MAX59AA002 Close
20* Turbine Ex-1 to 5 self power NRVs Close
21* Turbine Live steam control valves Close
22 Turbine LP & Bypass spray manual valve 11 - 61LAE10AA010 Close
23* Live steam header dr. to blow down MOV 11 - 61LBA18AA212 Open
24* Live steam header dr. to blow down MOV 11 - 6MAW10AA010 Open
25* Live steam header dr. to blow down MOV 11 - 61LBA21AA212 Open
26* Live steam header dr. to blow down MOV 11 - 61LBA22AA212 Open
27* Live steam header dr. to blow down MOV 11 - 61LBA21AA232 Open
28* Live steam header dr. to blow down MOV 11 - 61LBA22AA232 Open
29* Turbine Ex-2 dr. to Clean dr. MOV 11 - 61LBD13AA211 Open
30* Turbine Ex-2 dr. to blow down MOV 11 - 61LBD13AA223 Open
31* Turbine Ex-1 dr. to Flash tank MOV 11 - 61LBS10AA201 Open
32* Turbine Ex-1 dr. to Flash tank MOV 11 - 61LBS10AA202 Open
33* Turbine Ex-2 dr. to Flash tank MOV 11 - 61LBS20AA201 Open
34* Turbine Ex-2 dr. to Flash tank MOV 12 - 61LBS20AA202 Open
35* Turbine Ex-3 dr. to Flash tank MOV 11 - 61LBS30AA201 Open
36* Turbine Ex-3 dr. to Flash tank MOV 11 - 61LBS30AA202 Open
37* Turbine Ex-4 dr. to Flash tank MOV 11 - 61LBQ40AA201 Open
IB Steam Turbine Preservation
38 Turbine Ex-4 dr. to blow down manual v/v 11 - 61LBQ40AA214 Open
39* Turbine Ex-5 dr. to Flash tank MOV 11 - 61LBQ50AA201 Open
40* Turbine Ex-5 dr. to Flash tank MOV 11 - 61LBQ50AA202 Open
41* Turbine Ex-5 dr. to blow down MOV 11 - 61LBQ50AA201 Open
42* Turbine cross over lower dr. to flash tank 11 - 61MAC12AA201 Open
43 Crossover Blind flange by MMD no kks remove
44 Flexible hose Dehumifier by MMD no kks Connected
45 One LO Vap. Extraction fan is i/s 11 - 61MAV11AN001/2 i/s
46 Turbine Lub Oil system 11 - 61MAV i/s
47 Turbine Turning Gear ( Metal temp<100 oC) 11 - 61MAK80AE001 0ff
******* Condenser Hot well (optional) Drained
A) Confirm all above mentioned valves are lined up & no live steam is passing in to
the turbine.
B) Turbine is on Turning gear till Metal temp. is 100 oC.
C) Remove blind flange from top cross over line & keep it in safe place.
Extreame care should be taken so that nothing fall in to the opening.
D) The flexible hose from the Dehumidifier to be connected to the cross over pipe flange.
Ensure safe access to fix the hose.
E) Start Adsorptive Dehumidifier & confirm dry air flow (600m3/hr) to turbine with positive
pressure through out the preservation period. Warm air will escape through the turbine
shaft seal & through the drains to flash tank/ condenser.
Relative humidity of the dry air must never exceed 40%
F) Weekly run TG for 6 hrs. during preservation period.
G) Weekly run Turbine LO purifier for 12hrs.
H) Turbine cont. valves stroking every 3 months.
******* Condenser Hot well can be drained if Boiler is shut down (Req. for emergency make up if BH cond. On reject)
IB Steam Turbine Preservation
* Mark valves are either open or, close as per shut down/ start-up logics.
Information to CRE/SCE: Completion of the procedure,
Inform defects identified if any
NORMALISATION PRIOR TO START-UP OF TURBINE
Sl. No. Process name Description of valves Valve Position Confirmation
19 Condenser Vac. Breakers (partial) by IMD 11 - 61MAX59AA002 Energized
44 Flexible hose Dehumifier by MMD no kks Disconnected
43 Crossover Blind flange by MMD no kks FIXED
38 Turbine Ex-4 dr. to blow down manual v/v 11 - 61LBQ40AA214 OPEN
7 Turbine Ex-2 manual Bypass v/v of LBD13AA020 no kks OPEN
13 Turbine Ex-4 to HP-1 htr. Manual v/v 11 - 61LBQ40AA025 OPEN
22 Turbine LP & Bypass spray manual valve 11 - 61LAE10AA010 OPEN
45 One LO Vap. Extraction fan is i/s 11 - 61MAV11AN001/2 i/s
46 Turbine Lub Oil system 11 - 61MAV i/s
47 Turbine Turning Gear 11 - 61MAK80AE001 i/s
Confirmation of following valve position line up as per turbine start-up procedure & loading
Sl. No. Process name Description of valves Valve Position Confirmation
1 live steam to turbine MOV 11- 61LBA10AA010 / 011 Open
2 live steam to gland MOV 11 - 61MAW10AA010 Open
3 Aux. steam to gland MOV 11 - 61LBG50AA030 Open
IB Steam Turbine Preservation
4 Live steam stop valves 11 - 61MAA11 / 12AA001 Open
5 Turbine Ex-1 to LP-1 htr. MOV 11 - 61LBS10AA020 Open
6 Turbine Ex-2 to Desal LP steam MOV 11 - 61LBD13AA020 Open
8 Turbine Ex-2 to Desal LP steam MOV 11 - 61LBD14AA001 Open
9 Turbine Ex-2 to LP-2 htr. MOV 11 - 61LBS20AA020 Open
10 Turbine Ex-3 to FWT MOV 11 _ 61LBS30AA015 Open
11 Turbine Ex-3 to FWT MOV 11 _ 61LBS30AA025 Open
12 Turbine Ex-4 to HP-1 htr. MOV 11 - 61LBQ40AA015 Open
14 Turbine Ex-5 to HP-2 htr. MOV 11 - 61LBQ50AA020 Open
15 Turbine Ex-5 to Desal MP steam MOV 11 - 61LBD20AA005 Open
16 Turbine Ex-5 to Desal MP steam MOV 11 - 61LBD20AA020 Open
17 Turbine Ex-5 to Desal MP steam MOV 11 - 61LBD20AA023 Open
18 Condenser Vac. Breakers (full) 11 - 61MAX59AA001 Close
20* Turbine Ex-1 to 5 self power NRVs Open
21 Turbine Live steam control valves Open
23* Live steam header dr. to blow down MOV 11 - 61LBA18AA212 Close
24* Live steam header dr. to blow down MOV 11 - 6MAW10AA010 Close
25* Live steam header dr. to blow down MOV 11 - 61LBA21AA212 Close
26* Live steam header dr. to blow down MOV 11 - 61LBA22AA212 Close
27* Live steam header dr. to blow down MOV 11 - 61LBA21AA232 Close
28* Live steam header dr. to blow down MOV 11 - 61LBA22AA232 Close
29* Turbine Ex-2 dr. to Clean dr. MOV 11 - 61LBD13AA211 Close
IB Steam Turbine Preservation
30* Turbine Ex-2 dr. to blow down MOV 11 - 61LBD13AA223 Close
31* Turbine Ex-1 dr. to Flash tank MOV 11 - 61LBS10AA201 Close
32* Turbine Ex-1 dr. to Flash tank MOV 11 - 61LBS10AA202 Close
33* Turbine Ex-2 dr. to Flash tank MOV 11 - 61LBS20AA201 Close
34* Turbine Ex-2 dr. to Flash tank MOV 12 - 61LBS20AA202 Close
35* Turbine Ex-3 dr. to Flash tank MOV 11 - 61LBS30AA201 Close
36* Turbine Ex-3 dr. to Flash tank MOV 11 - 61LBS30AA202 Close
37* Turbine Ex-4 dr. to Flash tank MOV 11 - 61LBQ40AA201 Close
39* Turbine Ex-5 dr. to Flash tank MOV 11 - 61LBQ50AA201 Close
40* Turbine Ex-5 dr. to Flash tank MOV 11 - 61LBQ50AA202 Close
41* Turbine Ex-5 dr. to blow down MOV 11 - 61LBQ50AA201 Close
42* Turbine cross over lower dr. to flash tank 11 - 61MAC12AA201 Close
* Mark valves are either open or, close as per shut down/ start-up logics.
Information to CRE/SCE: Completion of the procedure,
Inform defects identified if any
