isolation / de isolation procedure - gpgc sop-019-isol, de-isol...1- stop the pump. 2- electrically,...

GAZA POWER GENERATION COMPANY 140 MW CCGT POWER PLANT

GAZA

SOP: 019 REVISION 2 SECTION: ISOLATION / DE-ISOLATION PROCEDURE

_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UTABLE OF CONTENT

1.0 HEAT RECOVERY STEAM GENERATOR …………………………… 2

* LP FEED WATER PUMP ……………………………………………………………. 2

* HP FEED WATER PUMP …………………………………………………………… 3

* HP FEED WATER SYSTEM………………………………………………………….. 4

* LP FEED WATER SYSTEM ………………………………………………………… 7

* FEED WATER TANK ………………………………………………………………… 11

* CHEMICAL DOSING ………………………………………………………………… 12

* LP STEAM SYSTEM ………………………………………………………………… 12

* HP STEAM SYSTEM ………………………………………………………………… 13

* FLASH TANK …………………………………………………………………………. 15

* BLOW DOWN TANK ………………………………………………………………… 16

2.0 DRAIN SYSTEM ………………………………………………………….. 17 3.0 CONDENSER EVACUATION SYSTEM ……………………………….. 18 4.0 CONDENSER SYSTEM …………………………………………………. 19 5.0 CONDENSATE SYSTEM ………………………………………………... 20 6.0 COMPRESSED AIR SYSTEM ………………………………………….. 24 7.0 CLOSED COOLING SYSTEM ………………………………………….. 25 8.0 GT LUBE OIL SYSTEM …………………………………………………. 28 9.0 WATER INJECTION SYSTEM ………………………………………….. 30 10.0 GAS IGNITION SYSTEM ………………………………………………... 31 11.0 LIQUID FUEL SYSTEM ………………………………………………….. 32 12.0 AIR INTAKE SYSTEM …………………………………………………… 34 13.0 HYDROLIC SYSTEM …………………………………………………….. 35 14.0 ST LUBE OIL SYSTEM ………………………………………………… 36 15.0 DEMI WATER SYSTEM …………………………………………………. 38 16.0 EXTERNAL FUEL SYSTEM …………………………………………….. 40


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UHEAT RECOVERY STEAM GENERATOR (HRSG) Isolation Of L.P. Feed Water Pumps # LAC 10AP001 / LAC 20AP001 / LAC30AP001:

1- Stop the pump. 2- Electrically, local MCB off . 3- Racked out the Circuit breaker to test position, locked out by using pad lock, tag out by

using warning signs 4- Close suction isolating valve # LAB 13/16/19 AA001 respectively. 5- Close discharge isolating valve # LAB 14/17/20 AA002. 6- Close Minimum flow isolating valve # LAB 15/18/21 AA001. 7- Open suction line drain LAB 13/16/19 AA200. 8- Isolated valves should be locked out and tagged out

UNote:

UIf the pump going to major overhaul the instruments are disconnected by IMD and electrical terminals disconnected by EMD.

LP Feed Water Pumps De-Isolation LAC 10/20/30 AP001:

1- Remove all pad locks 2- Remove all warning signs 3- Close suction drain valve LAB 13/16/19 AA200. 4- Open minimum flow valve LAB 15/18/21 AA001and chain locked . 5- Open suction manual valve LAB 13/16/19 AA001. 6- Open suction drain valve LAB 13/16/19 AA200 till solid. water comes (as vent) then

close. 7- Open manual valve LAB 30AA001 (HRSG 11&22 only).keep valve LAB30AA005

closed 8- Open manual drain valve LAB 30AA205. 9- Remove all pad locks 10- Remove all warning signs 11- Open discharge valve LAB 51/54/57 AA002 till water comes from the drain valve

LAB 30AA205 & close discharge valve. 12- Close manual drain valve LAB 30AA205. then close discharge valve 13- Electrically local MCB switch ON & circuit breaker racked in. 14- Start the pump and open discharge valve LAB 14/17/20 AA002 gradually. 15- Be sure that LP feed water system in normal mode.

Isolation HP Feed Water Pump #LAC40 / #LAC50 / #LAC60 AP001:

1- Stop the pump. 2- Local MCB off


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

3- . Isolated valves should be locked out and tagged out 4- Circuit breaker racked out. 5- Close suction isolating valve LAB 50/53/56 AA001. 6- Close discharge isolating valve LAB 51/54/57 AA002. 7- Close Minimum flow isolating valve LAB 52/55/58 AA001. 8- Close balance valve LAC 41/51/61 AA001. 9- Close cooling water inlet and outlet valves. 10- Open suction lines drain LAB 50/53/56 AA200. 11- If the motor is to be disconnected, temporary space heat is to be connected by the EMD.

UNote: UIf the pump going to major overhaul the instruments are to be disconnected by IMD and electrical terminal disconnected by EMD.

HP Feed Water Pumps De-Isolation: 1- Remove warning signs and pad locks 2- Open cooling water inlet & outlet valves. 3- Open minimum flow valves LAB 52/55/58 AA001. 4- Open balance valve LAC 41/51/61 AA001. 5- Open suction isolating valve LAB 50/53/56 AA001 gradually. 6- When solid water comes through system drain valves LAB 50/53/56 AA200 close them. 7- Open safety valve for balancing line LAC 41/51/61 AA801 to release air (i.e. use as vent

for the pump) 8- Open discharge isolating valve LAB 51/54/57 AA002 9- Electrically supply switch ON. 10- Circuit breaker switch ON.

LP Feed Water System: (Isolation) LP Feed Water Pumps In Service: 1- Bypass damper is closed to HRSG. 2- Close manual isolating valves LAB 30AA001, 005. 3- Close manual isolating valve HAC 10AA003, 002. 4- Close manual isolating valve HAC 11AA101. 5- Close manual isolating valves HAC 30AA003, 002. 6- Close manual isolating valve HAC 31AA001. 7- Open LP Mix-Eco vent valves HAC10AA285, 280, 275, 270, 265, 260, 255, 250, 245. 8- Open LP Mix-Eco drain valves HAC10AA240, 235, 230, 225, 220, 215, 210, 205,200. 9- Open drain valve LAB 40AA200.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

10- Open drain valve HAC 10AA290. 11- Open control valve HAC 10AA101. 12- Open drain valve HAC 30AA215.

UNote:

1) If the LP feed water pumps S/D (i.e. block out of service ) LP pumps electrical supplies switch off.

2) If there any work inside HRSG modules, Gelatin must be installed. LP Feed Water System De-Isolation:

1- Close drain valve LAB 40AA200. 2- Close LP Mix. Eco. Common drain valve HAC 10AA240. 3- Close manual drain valve HAC 10AA290. 4- Close manual drain valve HAC 30AA215. 5- Open manual valve LAB30AA005 party till flow sound disappear (i.e. Pressure balanced)

& wait till solid water comes out from LP Mix. Eco. Common vent HAC 10AA285. 6- Close LP Mix-Eco common vent valve HAC 10AA285. 7- Close LP mix eco. Drain valves, HAC10AA200,205, 210, 215, 220, 225, 230, 235 8- Close LP mix eco. Vent valves, HAC10AA245, 250, 255, 260, 265, 270, 275, 280 9- Close control valve, HAC10AA101 10- Open isolation valve, HAC10AA002, 003

HP Feed Water System: Isolation HP Feed Water drum Control Valve LAB 70AA101: (A) While HRSG in service:

1- Keep in contact with DCS operator. 2- Open bypass valve LAB 71AA101 gradually. 3- Keep an eye on control valve local indication the control valve will start to close gradually,

while DCS operator audit the level in the HP drum. 4- When the control valve open 0%, i.e. the water passes through the bypass & HP drum

level is stable. 5- Close isolation valve LAB 70AA001 with co-ordination with DCS operator.

UImportant Note : At that point the level in the drum may decrease, that is because the control valve was passing.

6- Close the isolation valve LAB 70AA002. 7- Open the control valve, LAB70AA101 8- Open the drain valve LAB 70AA210, 215. 9- Close the instrument air valve.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UNote: If the control valve is going for major overhaul the instruments are to be

disconnected by IMD. De- Isolation Of HP Feed Water Control Valve LAB70AA101: (A) HRSG in service:

1- Open the control valve LAB70AA101 instrument air valve. 2- Keep in contact with DCS operator. 3- Close the control valve LAB70AA101. 4- Close drain valves LAB70AA210, 215. 5- Open isolation valve LAB70AA002. 6- Open isolation valve LAB 70AA001. UNote:

At that point the level in the HP drum may increase, that is because the control valve may passes.

7- Put control valve LAB 70AA101 on auto mode. 8- Start to close bypass valve LAB 71AA101 slowly while keep an eye on control valve

indication with coordination with DCS operator. 9- Full close the bypass valve LAB71AA101 & make sure that the level in HP is stable.

(B) HRSG out of service (LAB70AA101)

1- Open control valve LAB 70AA101 instrument air valve. 2- Open isolation valves LAB 70AA001,002. 3- Close drain valves LAB 70AA210, 215. 4- Close control valve LAB 70AA101.

HRSG Out Of Service: While HP Drum Feed Water Pump In Service Or S/D:

1- Close manual valve LAB 70AA003 2- Close isolation valves LAB 70AA001, 002 3- Close bypass valve LAB 71AA001 4- Open drain valves LAB 70AA210, 215 5- Close instrument air valve.

UNote:

If the valve going for major overhaul, instruments are to be disconnected by IMD.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

HP Feed Water System Isolation:

1- Bypass damper close to HRSG. 2- Close manual valves LAB 70AA003, 001, 002. 3- Close manual valve LAB 71AA101. 4- Close manual valve LAB 72AA001. 5- Open control valve LAB 70AA101. 6- Open manual drain valve LAB 70AA210,215. 7- Open manual drain valve LAB 72AA200,205. 8- Close manual valve LAE 30AA001. 9- Close manual valve LAE 20AA001. 10- Close bypass valve LAE 21AA106. 11- Open drain valve LAE 20AA200, 210. 12- Open drain valve LAE 30AA200, 205. 13- Open control valve LAE 20AA106. 14- Open isolation valve LAE 20AA002. 15- Open HP Mix-Eco vent valves HAC 50AA245, 250, 255, 260, 265,270,275,280,285. 16- Open HP Mix-Eco drain valves HAC 50AA200, 205,210, 215, 220, 225, 230, 235,240. 17- Open HP Eco. Vent valves HAC 60AA290, 248,252, 256, 260, 264, 268,

272,276,280,284,288. 18- Open HP Eco. Drain valves HAC 60AA200, 204,208, 212, 216, 220, 224,

228,232,236,240,244. UNote: If there is any work to be carried out inside boiler modules, Gelatin plate must be

installed. If the HP feed water pumps are o/s, local MCB and circuit breaker switch off

HP Feed Water System De-Isolation:

1- Open vent valve LAB 70AA200, 205. 2- Close drain valve LAB 72AA200, 205. 3- Close HP Mix-Eco common drain valve HAC 50AA240, 235, 230, 225, 220, 215, 210, 205, 200

4- Close HP Eco. common drain valve HAC 60AA244, 240, 236, 232, 228, 224, 220, 216, 212, 208

5- Start HP pump. 6- Open manual valve LAB 70AA003 gradually. 7- When solid water comes through vent valve LAB 70AA200, 205 close vent valves.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

8- Open isolation valve LAB 70AA001 while keeping isolation valve LAB70AA002 in open position.

9- Open control valve LAB 72AA101. 10- Open control valve LAB70AA001 gradually.

UNote: UIf feed water temperature ≈ 100 ˚c, keep flow = 1.5 kg/s for 0.5 hour

11- When solid water comes through HP Mix. Eco. Common vent valve HAC 50AA285 close it. And close vent valves HAC50AA245, 250, 255, 260, 265, 270, 275, 280

12- When solid water comes through HP Eco. Common vent valve HAC 60AA288 close it and vent valves, HAC60AA248, 252, 256, 260, 264, 268, 272, 276, 280, 284, 290

Control Valve On Feed Water System:

Low Pressure Feed Water System: (During HRSG in service) Isolate LP Feed Water To LP Drum Control Valve HAC 10AA101:

U(A) HRSG in service: 1- Keep in contact with DCS operator. 2- Open bypass valve HAC 11AA101 gradually. 3- Keep an eye on control valve local indication the control will start to close gradually, while

DCS operator audit the level in the LP drum. 4- When the control valve open 0%, the water flow pass through the bypass & LP drum level

is stable. 5- Close the isolation valve HAC 10AA001 with co-ordination with DCS operator.

UImportant Note : UAt that point the level in the drum may decrease, that is because the control was passing.

6- Close the isolation valve HAC 10AA002. 7- Open the drain valve HAC 10AA290. 8- Open the control valve. 9- Close the instrument air valve. UNote: UIf we are going to major overhaul instruments are to be disconnected by IMD.

U (B) HRSG out of service:, UDuring LP feed water pump in service

Isolate LP Feed Water To LP Drum Control Valve HAC 10AA101: 1- Close valve LAB 30AA001, LAB 30AA005. 2- Close isolation valves HAC 10AA001, 002.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

3- Open drain valve HAC 10AA290. 4- Open control valve HAC 10AA101. 5- Close instrument air valve.

De- Isolation LP Feed Water drum Control Valve HAC 10AA101: (A) HRSG in service:

1- Open the control valve HAC 10AA101 instrument air valve. 2- Keep in contact with DCS operator. 3- Close drain valve HAC 10AA290. 4- Close the control valve HAC 10AA101. 5- Open isolation valve HAC 10AA002. 6- Open isolation valve HAC 10AA001. Note: At that point the level in the LP drum may increase, because the control valve may passes. 7- Start to close bypass valve HAC 11AA101 slowly while keep an eye on control valve

indication & coordination with DCS operator. 8- Fully close the bypass valve HAC11AA101 and make sure that the level in the drum is

stable. (B) HRSG out of service:

1- Open control valve HAC 10AA101 instrument air valve. 2- Close control valve HAC 10AA101. 3- Close drain valve HAC 10AA290. 4- Open isolation valves HAC 10AA001,002, 003.

Isolation of LP Mix. Eco. To Dearator Control Valve HAC 30AA121: U(A)HRSG out of service

1- Close valve HAC 30AA003. 2- Close isolation valves HAC 30AA001, 002. 3- Close bypass valve HAC 31AA001. 4- Open drain valve HAC 30AA215. 5- Close instrument air. 6- Ensure that the control valve open.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UNote:- If the valve is going for major overhaul , the instrument are to be disconnected by IMD.

De-Isolation Of LP Mix. Eco To Dearator: Control valve HAC30AA121 (B) HRSG out of service:

1- Open the control valve HAC 30AA121 instrument air valve. 2- Close the control valve HAC 30AA121. 3- Close drain valve HAC 30AA215. 4- Open manual valve HAC 30 AA003. 5- Open isolation valves HAC 30AA001, 002. 6- Put control valve HAC 30AA121 in auto mode from DCS

Isolation Spray Water Control Valve LAB 20AA106: HRSG in service:

1- GT load must be constant during bypass control v/v in service . 2- Keep in contact with DCS operator. 3- Open the bypass valve LAE 21AA106 gradually. 4- Keep an eye on valve local indication the control valve will start to close gradually while

DCS operator audit the temperature of super heated steam. 5- When the control valve opens 0%, i.e. the water flow passes through the bypass & super

heated stream temperature is stable. 6- Close the isolation valve LAE 20AA001, with coordination with DCS operator.

UNote: At that point the temperature of super heated steam may decrease because the control valve was passing.

7- Close the isolation valve LAE 20AA002. 8- Open the control valve. 9- Open drain valves LAE 20AA200, 210. 10- Close instrument air valve.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

URemark: Keep the super heated temperature at max 500 ˚C to have chance to control the

temperature. An operator has to stay close to bypass valve LAE21AA106 for open/close the v/v This isolation is not applicable for long time

UNote: If the control valve is going for major overhaul the instrument are to be disconnected by IMD.

De-Isolation Of Spray Water Control Valve LAB 20AA106: (A) HRSG in service:

1- Open control valve LAE 20AA106 instrument air valve. 2- Keep in contact with DCS operator. 3- Close drain valves LAE 20AA200, 210. 4- Close the control valve LAE 20AA106 from DCS 5- Open the isolation valve LAE 20AA002. 6- Open the isolation valve LAE 20AA001. Note: At this point super heater steam temperature may decrease because the control valve may passes. 7- Put control valve LAE 20AA106 in auto mode. 8- Start to close the bypass valve LAE 21AA106 slowly, while keeping an eye on control

valve indication & keep in contact with DCS operator. 9- Completely close the bypass valve LAE 21AA106.

(B) HRSG out of service ( during filling of the system):

1- Open control valve LAE 20AA106 instrument air valve operator. 2- Close control valve LAE 20AA106. 3- Open isolation valve LAE 20AA001. 4- Close drain valves LAE 20AA200,210 after solid water comes through. 5- Open manual valve LAE 30AA001. 6- Make sure that isolation valve LAE 20AA002 is open


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

Isolation Of Feed Water Tank (Dearator) LAA 10BB001: 1- Both HRSG out of service. 2- Feed water pumps (HP+LP) block (elect. Supply switch off). 3- Full open vent values LAA 30AA200, LAA 35AA200. 4- Close HP steam to dearator valves LBS 20AA002 &LBS 21AA001 5- Close LP steam to dearator valves LBA 20AA002&LBA 21AA001 6- Close LP Mix. Eco. to dearator valves HAC 30AA003 for both boilers. 7- Close make up water valves GCK 10AA001, 002. 8- Close & block make up control valve GCK 10AA120. 9- Close & chain lock make up bypass valve GCK 11AA001. 10- Close condensate valve LCA 50AA001. 11- Open drain valves LAA 10AA200, 205. 12- Chemical dosing pumps LFN 11/16AP001 block (elect. Supply switch off) 13- Close manual valve LBS 10AA001.

Feed Water Tank De-Isolation:

1- Close drain valves LAA 10AA200,205. 2- Make up control valve GCK 10AA120 normalized. 3- Open make up isolation valves GCK 10AA001, 002. 4- Chain unlock bypass valve GCK 11AA001. 5- Open condensate valve LLA 50AA001. 6- Open HP steam to dearator isolation valves LBS 20AA002 & LBS 21AA001. 7- Open LP steam to dearator isolation valves LBA 20AA002 & LBA 21AA001 8- Open LP Mix. Eco. To dearator valves HAC 30AA003 for both boilers. 9- Chemical dosing pumps LFN 11/16ap001 unblock (elect. Supply switch on) 10- Manual valve LBS 10AA001 open. 11- Open make up water valve GCK 10AA120.

UDearator Vent Valves U: LAA 30AA200 LAA 35AA200 S/D job & feed water tank cooled down.


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UIsolation Feed Water Tank Sight Glass: 1- Close isolation valves LAA 10AA320, 325. 2- Open drain valve LAA 10AA205.

UChemical Dosing Pump (AMONIA) LFN 11AP001:

1- Stop the pump. 2- Close valve LFN 12AA001 3- Close valve LFN 10AA001 4- Electrically, MCB off & circuit breaker off.

UChemical Dosing Pp LFN 10ap001: (Hydrazine) 1- Stop the pump 2- Close valve LFN 15AA001 3- Close valve LFN 17AA001 4- Electrically, MCB off & circuit breaker off.

UIsolation Feed Water Tank Drain Valve LAA 10AA205: S/D job + feed water tank empty. Isolation Make Up Water Control Valve GCK 10AA120

1- Keep in contact with DCS operator 2- Close isolation valves GCK 10AA001, 002 3- Open the control valve GCK 10AA120 4- Open drain valve GCK 10AA210 5- Close instrument valve.

UNote: If the HRSG in service bypass valve must be opened upon feed water tank level. UNote: If the control valve is going for major overhaul the instrument are to be disconnected by IMD.

ULP Steam System Isolation:

1- Bypass damper closed & GUILLOTINE plate installed. 2- Close manual valve HAC 10AA003 3- Be sure that isolation valves LAB 30AA001, 005 are closed


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4- Open vent valve LBA 10AA200 5- Open drain bypass to trap valve LBA 10AA210 6- Open LB evaporation drain valve HAD 21AA200, 205 7- Open drain valve LBA 10AA225 8- Chemical dosing pump LFN 21AP001 block 9- Open LP dump scum valve HAD 10AA200 10- Open LP continuous blow down valve HAD 11AA200, 126

LP Steam System De-Isolation:

1- Be sure that LP feed water system in base position. 2- Close drain valves HAD 21AA200, 205 3- Close drain bypass to trap valve LBA 10AA210 4- Close continuous blow down valve HAD 11AA126 5- Close LP drum scum valve HAD 10AA200 6- Open manual valve HAC 10AA003 7- Open feed water control valve HAC 10AA101 at flow of 1 kg/s 8- Fill the LP drum to high high level then open drain valve HAD 21AA200, 205 to start up

level to avoid any chance for air existence in evaporator.

HP Steam System Isolation: (Other HRSG In Service)

1- Bypass damper closed to HRSG & GUILLOTINE plate installed. 2- Close spray water valve LAE 30AA001. 3- Open spray water drain valves LAE 30AA200,205 4- Isolate HP feed water system as instructed before. 5- Close motorized valve LBA 50AA002 & electrical supply off 6- Close motorized bypass valve LBA 51AA001 & electrical supply off 7- Close manual valve LBA 50AA001 & chain lock 8- Open drain valves LBA 50AA200, 205 9- Open drain valves LBA 50AA235, 240 10- Open super heater vent valves HAH 60AA210, 215 & HAH 50AA200, 205 & HAH

20AA210, 215 11- Open super heater drain valves HAH 20AA200, 205 & HAH 30AA200, 205 & HAH

60AA200, 205 12- Open HP drum vent valves HAH 10AA200,205 13- Open HP drum scum valves HAH 50AA205, 210 14- Open HP evaporator drain valves HAD 61AA200, 205 15- Open continuous blow down valves HAD 51AA200, 126 16- Block (electrically) chemical dosing pump LFN 31AA001


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

HP Steam System De-Isolation:

1- Make sure that HP feed water system in normalized to be filled as instructed before. 2- Close HP evap. drain valves HAD 61AA200,205 3- Close HP drum scum valves HAD 50AA205, 210 4- Close HP drum continuous blow down valve HAD 51AA126 5- Start filling the HP system through control valve LAB 70AA101

UNote: if feed water temp. =100 ˚c, feed water flow = 1.5 kg/s for 0.5 hour to avoid thermal stress.

6- Fill the HP drum to high high level then put back to start up level by opening HP evaporator drain valves HAD 60AA200, 205 to avoid any presence of air in the system.

7- Close super heater vent valves HAH 60AA210, 215 & HAH 50AA200, 205 & HAH 20AA210, 215

8- Normalize spray water system as instructed before 9- Unblock (normalize) chemical dosing pump LFN 31AA001 10- Take gelatin plate out. 11- Ensure that all the motorized valves are on remote control mode & their isolation manual

valves are open.

ULP Drum Sight Glass Isolation: 1- Close inlet & outlet valves HAD 10AA340, 345 carefully(don’t apply much force) 2- Open drain valve HAD 10AA205

LP Drum Sight Glass De-Isolation: 1- Close drain valve HAD 10AA205 2- Open lower inlet valve HAD 10AA345 3- Open upper valve HAD 10AA340


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HP Drum Sight Glass Isolation:

1- Close inlet & outlet valves HAD 50AA360, 365,370,375 carefully(don’t apply much force on 370 & 375)

2- Open drain valves HAD 50AA215, 220

HP Drum Sight Glass De-Isolation:

1- Close drain valves HAD 50AA215,220 2- Open lower inlet valves HAD 50AA365, 375 carefully(without apply much force on 375) 3- Open upper valves HAD 50AA360, 370 carefully (without apply much force on 370)

Isolation Of Feed Water Tank Sight Glass Laa10cl235

1- Close inlet & outlet valves LAA 10AA370, 325 2- Open drain valve LAA 10AA205

De-Isolation Of Feed Water Tank Level Sight Glass LAA 10CL235:

1- Close drain valve LAA 10AA205 2- Open lower vent valve LAA 10AA320 3- Open upper valve LAA 10AA 375

Isolation Of Flash Tank LBS 10bb001:

Isolation Can Be Only Be Carried Out If Both HRSG Are S/D:

1- Close manual valve LBS 10AA001 2- Close LP continuous blew down valves HAD 11AA200, 126 for both boilers 3- Close HP continuous blew down valves HAD 51AA200, 126 for both boilers 4- Open drain bypass to traps LBS 10AA200


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De-Isolation & Flash Tank LBS 10BB001:

1- Close drain bypass to traps LBS 10AA200 2- Open manual valve LBS 10AA001 3- Open LP continuous blow down manual valves HAD 11AA200 4- Open HP continuous blow down manual valve HAD 51AA200

Blow Down Tank Isolation:

HRSG 11, 22

1- Both HRSG were S/D. 2- Both HRSG drained & cooled down. 3- Open drain valve HAH 40AA200 & ensure that the tank is empty.

HRSG 13, 24

1- HRSG is S/D 2- HRSG drained & cooled down 3- open drain valve HAN 40AA200 & ensure that the tank is empty.

Isolation Of Steam Trap: (Important)

1- Close inlet & outlet valves 2- Open bypass valve very little 3- Wait till it becomes cold physically i.e. No passing through isolation valve

De-Isolation Of Steam Trap:

1- Close the bypass valve 2- Open outlet isolation valve 3- Open inlet isolation valve


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UDRAIN SYSTEM

Isolation of drain pump MAL73AP001/002

1- Stop the pump from CCR 2- Pump power supply and circuit breaker switch off. 3- Close inlet valve MAL71/72AA001. 4- Close outlet valve MAL74/75AA002. 5- Open drain valve MAL71/72AA201. 6- Open drain valve MAL74/75AA201.

De- Isolation of drain pump MAL73AP001/002

1- Close drain valve MAL71/72AA201. 2- Close drain valve MAL74/75AA201. 3- Open inlet valve MAL71/72AA001. 4- Open outlet valve MAL74/75AA002. 5- Pump power supply and circuit breaker switch on.


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UCONDENSER EVACUATION SYSTEM

Isolation of steam jet air ejector unit 1/2

1- Keep in contact with DCS operator to audit the vacuum in the condenser. 2- Close air valve MAJ10AA010 / MAJ20AA005, from CCR 3- Wait few minutes till pressure drops in the ejector unit. 4- Be sure that the vacuum in condenser is ok not increasing up. 5- Close steam valves MAJ30AA023,025/008,010. 6- Close valve MAJ40/60AA005. 7- Close valve MAJ50/70AA005. 8- Close valve MAJ50/70AA010.

U Note: • Work can be done only on the isolated area. • No work can be done on condenser MAJ10AC005. • Isolation can be done only when the system in service, when the system is out

of service isolation is not required to perform the job. • When work is to be done on isolated area wait till it cool down.

De- Isolation of steam jet air ejector unit ½

1- Open valve MAJ50/70AA010. 2- Open MAJ50/70AA005. 3- Open valve MAJ40/60AA005. 4- Open steam valves MAJ30AA023,025/008,010 slowly (heat up the system first). 5- When the ejector is to be put in service DCS operator opens air valve MAJ10AA010 /

MAJ20AA005.


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UCONDENSER SYSTEM Isolation of condenser MAG10AC010

1- The steam turbine out of service - Shut down job (steam turbine). 2- Close main cooling inlet isolating valve PAC10AA001. 3- Close main cooling outlet isolating valve PAC20AA001. 4- Open drain valve PAC20AA201. 5- Open drain valve PAC10AA201. 6- Open vent valve MAG10AA215,216. 7- Open drain valves MAG10AA211,212,213,214. 8- Open vent valves MAG10AA220,222,221,223. 9- If hot well is to be drained open drain valves LCA11,12AA202.

De- Isolation of condenser MAG10AC010 the

1- Close drain valves LCA11, 12AA202. 2- Close drain valve PAC20AA201. 3- Close drain valve PAC10AA201. 4- Close drain valves MAG10AA211, 212,213,214. 5- Close vent valves MAG10AA215, 216. 6- Close vent valves MAG10AA220, 222,221,223. 7- Open main cooling outlet valve PAC20AA001, gradually and keep the pressure above limit

wait till sea water coming out from the vents then close all vents and open the outlet v/v fully.

8- Open main cooling inlet valve PAC10AA001, from DSS during start up process.


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UCONDENSATE SYSTEM Isolation of condensate pump LCB11/12AP001

A) UNIT IN SERVICE

1- Stop the pump, power supply and circuit breaker switch off and racked out 2- Close suction valve LCA11/12AA001. 3- Close discharge valve LCA15/16AA002. 4- Slowly open drain valve LCA11/12AA204. 5- Keep in contact with DCS operator to ensure that the vacuum in the condenser hasn’t

been affected. 6- Open drain valves LCA15/16AA201, 202. 7- If the motor space heater was removed, it has to be connected back

B)UNIT OUT OF SERVICE

1- Condensate pump power supply and circuit breaker racked out 2- Open isolation valves (inlet+outlet) LCA11/12AA001 & LCA15/16AA002. 3- Open drain valves LCA11/12AA204 & LCA15/16AA201,202.

De- Isolation of condensate pump LCB11/12AP001

A) SYSTEM IN SERVICE

1- Close suction drain valve LCA11/12AA204. 2- Close discharge drain valve LCA15/16AA201,202. 3- Slowely open suction valve LCA11/12AA001. 4- Open discharge valve LCA15/16AA002. 5- Pump power supply ON and circuit breaker switch on.

B) SYSTEM OUT OF SERVICE

1- Close suction drain valve valve LCA11/12AA204. 2- Close discharge drain valve LCA15/16AA201,202. 3- Open suction valve LCA11/12AA001. 4- Open discharge valve LCA15/16AA002. 5- Pump power supply ON and circuit breaker switch on.

Isolation of control valve LCA42AA003


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

A) SYSTEM IN SERVICE

1- Keep in contact with DCS operator. 2- Start to open bypass valve LCA24AA005 slowly while keeping in close contact with

DCS operator to control the level in the hot well. 3- The control valve LCA42AA003 starts to close. 4- Keep opening bypass valve slowly till the control valve opens 0% (i.e. close 100%). 5- Close isolation valves LCA42AA002, 004. 6- Open the control valve LCA42AA003. 7- Open drain valve LCA42AA201. 8- DCS operator has to keep the hot well level under observation 9- Close control valve instrument air valve. 10- Keep observing the level, if the control valve is passing, the bypass valve

UNote: this isolation can be done for short time only.


1- Close isolation valves LCA42AA002,004. 2- Open control valve LCA42AA003. 3- Open drain valve LCA42AA201. 4- Close control valve instrument air valve.

De- Isolation of control valve LCA42AA003 A) SYSTEM IN SERVICE

1- Keep in contact with DCS operator. 2- Open control valve instrument air valve. 3- Close drain valve LCA42AA201. 4- Close control valve LCA42AA003. 5- Open isolation valves LCA42AA002,004.

UNote: UAt that point DCS operator has to observe the level in the hotwell,it may decrease because the control valve may passes.

6- Start to close the bypass valve LCA42AA005 slowly with coordination with DCS operator. 7- Full close the bypass valve while the control valve starts to control the condensate flow.



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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

1- Open control valve instrument air valve. 2- Close the control valve LCA42AA003. 3- Close drain valve LCA42AA201. 4- Open isolation valves LCA42AA002,004.

Isolation of condensate preheater LCA30AH001

A. If the plant is working on liquid fuel filter, the condensate preheater is already isolated. B. If the plant is working on natural gas: 1- Open feed water bypass valve LAB11AA001. 2- Close feed water valves LAB12,10AA001. 3- Open condensate bypass valve LCA51AA001. 4- Close condensate valves LCA45,46AA001. 5- Close condensate valves LCA50AA001,002.

De- Isolation of condensate preheater LCA30AH001

1- Open condensate valve LCA45,46AA001. 2- Open condensate valves LCA50AA001,002. 3- Close condensate bypass valve LCA51AA001. 4- Open feed water valves LAB12,10AA001. 5- Close feed water bypass valve LAB11AA001.

Isolation of condensate 3 way valve LCA50AA122

A. If the plant is working on liquid fuel, this valve is already isolated. B. If the plant is working on natural gas fuel 1- Open bypass valve LCA51AA001. 2- Close valves LCA50AA001,002. 3- Close valves LCA45,46AA001. 4- Open drain valve LCA50AA200. 5- Open drain valve LCA46AA200. 6- Close instrument air valve.

UNote: this isolation affects the efficiency of the HRSG’s

De- Isolation of condensate 3 way valve LCA50AA122

1- Open instrument air valve 2- Close LCA50,46AA200.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

3- Open valves LCA50AA001,002. 4- Open valves LCA45,46AA001. 5- Close bypass valve LCA51AA001.

Isolation of condensate system LCA

1- Shut down job. 2- Condensate pumps LCB11,12AP001 power supply and circuit breaker switch off. 3- Close suction valves LCA11,12AA001. 4- Close valve LCA43AA004/001 5- Open vent valve LCA50AA205. 6- Open drain valve LCA45AA200. 7- Open drain valve LCA15,16AA201,202. 8- Open bypass valve LCA42AA005. 9- Open drain valve LCA42AA202. 10- Open drain valve LCA43AA201.

De- Isolation of condensate system LCA

1- Close drain valve LCA43AA201. 2- Close drain valve LCA42AA202. 3- Close drain valve LCA15,16AA201,202. 4- Close drain valve LCA45AA200. 5- Close bypass valve LCA42AA005. 6- Open valve LCA43AA004. 7- Open suction valves LCA11,12AA001. 8- Condensate pumps LCB11,12AP001 power supply and circuit breaker switch on. 9- Close vent valve LCA50AA205. when system becomes full of water.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UCOMPRESSED AIR SYSTEM Isolation of air compressor QEA10/20 Make sure that other compressor is working normal

1- Air compressor power supply and circuit breaker switch off and Racked out. 2- Fan 00QEA60/70AN001 power supply switch off locally and from 00 switch gear 3- Close manual valve 00QEA10/20AA001. 4- Fans 00QEA60/70AN001 to be isolated while compressor is isolated

De- Isolation of air compressor QEA10/20

1- Air compressor power supply and circuit breaker switch on. 2- Fan 00QEA60/70AN001 power supply switch. 3- Push start button to start the compressor. 4- Open manual valve 00QEA10/20AA001.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UCLOSED COOLING SYSTEM

Isolation of closed cooling pump PGA11/12AP001

1- Stop the pump, power supply and circuit breaker switch off / racked out 2- Close inlet valve PGA11/12AA001. 3- Close outlet valve PGA13/14AA002. 4- Open drain valve PGA11/12AA202. 5- Open vent valve PGA13/14AA201.

De- Isolation of closed cooling pump PGA11/12AP001

1- Close drain valve PGA11/12AA202. 2- Open inlet valve PGA11/12AA001. 3- Be close to make up water valve PGF20AA001 to compensate the closed cooling system

pressure drop. 4- When solid water comes through vent valve PGA13/14AA201 close it. 5- Slowly open outlet valve PGA13/14AA002 while keeping an eye on pressure of the other

pump (in service). 6- Pump power supply and circuit breaker switch on.

Isolation of heat exchanger 00PGD10/20/30AH001

1- Close auxiliary cooling inlet valve 00PAC71/72/73AA001. 2- Close auxiliary cooling outlet valve 00PAC74/75/76AA001. 3- Close closed cooling outlet valve 00PGB42/43/44AA001. 4- Open auxiliary cooling drain valve 00PAC71/72/73AA203. 5- Close closed cooling inlet valve 00PGB32/33/34AA001. 6- Open closed cooling drain valve 00PGB42/43/44AA201.

De- Isolation of heat exchanger 00PGD10/20/30AH001

1- Close auxiliary cooling drain valve 00PAC71/72/73AA203. 2- Open auxiliary cooling inlet valve 00PAC71/72/73AA001. 3- Open auxiliary cooling outlet valve 00PAC74/75/76AA001.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

4- Close closed cooling drain valve 00PGB42/43/44AA201. 5- Slowly open closed cooling inlet valve 00PGB32/33/34AA001. 6- Open closed cooling outlet valve 00PGB42/43/44AA001. 7- In the last two steps the pressure in the closed cooling system will drop very sharply ,so

open make up water valve PGF20AA001 accordingly.

Isolation of closed cooling on boiler (HRSG13&24 side only)

1- HP FW pumps LAC40,50,60AP001 power supply and circuit breaker switch off. 2- Sample system must be isolated. 3- Close inlet valve PGA63AA001. 4- Close outlet valve PGA75AA001. 5- Open drain valves PGA64,65,67AA201. 6- Open vent valves PGA75AA201 & PGA63AA203.

De- Isolation of closed cooling on boiler (HRSG13&24 side only)

1- Close drain valves PGA64,65,67AA201. 2- Slightly open inlet valve PGA63AA001. 3- You have to compensate the drop in closed cooling water pressure immediately by

make up water valve PGF20AA001. 4- When solid water comes through vent valves PGA75AA201 & PGA63AA203 close

them. 5- Full open inlet valve PGA63AA001. 6- Open outlet valve PGA75AA001. 7- HP FW pumps LAC40,50,60AP001 power supply and circuit breaker switch on.

Isolation of closed cooling on boiler (HRSG11&22 only) 1- Close inlet valve PGA66AA001. 2- Close outlet valve PGA73AA002. 3- Open drain valve PGA66AA202.

De- Isolation of closed cooling on boiler (HRSG11&22 only)

1- Close drain valve PGA66AA202. 2- Open inlet valve PGA66AA001. 3- Open outlet valve PGA73AA002.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

4- Compensate the drop in closed cooling system pressure by make up valve PGF20AA001.

Isolation of closed cooling system on GT13 & ST10

1- GT13 must be under shut down and cooled down. 2- ST10 must be under shut down and cooled down. 3- Block10 HP FW pumps LAC40,50,60AP001 must be blocked, power supply and circuit

breaker switch off. 4- Block 10 sample system must be isolated. 5- Close inlet valve 13PGA10AA001. 6- Close outlet valve 13PGA81AA001. 7- Open drain valves 13PGA10,81AA201. 8- Open vent valves 10PGA63AA203 & 10PGA75AA201. 9- Open drain valve 13PGA20AA201. 10- Open drain valves 10PGA21,22AA201. 11- Open drain valves 10PGA64,65,67AA201.

UNote: same isolation is used for GT24 & ST20.

De- Isolation of closed cooling system on GT13 & ST10

1- Close drain valves 13PGA10,81AA201. 2- Close drain valve 13PGA20AA201. 3- Close drain valves 10PGA21,22AA201. 4- Close drain valves 10PGA64,65,67AA201. 5- Slightly open inlet valve 13PGA10AA001. 6- You have to be very close to make up water valve PGF20AA001 to maintain the

pressure in the system. 7- When solid water comes through vent valves 10PGA63AA203 & 10PGA75AA201

close them. 8- Full open inlet valve 13PGA10AA001. 9- Open outlet valve 13PGA81AA001. 10- Normalize HP pump. 11- Normalize sample system.

Isolation of closed cooling system on GT22

1- GT22 must be under shut down and cooled down. 2- Close inlet valve 22PGA10AA001. 3- Close manual valve 11PGA10AA002.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

4- Close manual valve 22PGA71AA002. 5- Close outlet valve 22PGA21AA001. 6- Open drain valve 11PGA10AA205. 7- Open drain valve 24PGA66AA202. 8- Open drain valve 22PGA21AA201.

UGT LUBE OIL SYSTEM

Isolation of lube oil pump MBV21/22/23AP005

1- If we are going to isolate one pump the other two MUST be in service. 2- Pump MBV21/22/23AP005 power supply and circuit breaker switch off , that can be done

only as a group with HP lube oil pump MBV51/52/53AP005. 3- Close outlet valve MBV21/22/23AA015.

De- Isolation of lube oil pump MBV21/22/23AP005

1- Open outlet valve MBV21/22/23AA015. 2- Pump MBV21/22/23AP005 power supply and circuit breaker switch on.

UNote: be sure that the in group HP lube oil pump is normalized.

Isolation of lube oil pump MBV51/52/53AP005

1- If we are going to isolate one pump, the other two MUST be in service. 2- Pump MBV51/52/53AP005 power supply and circuit breaker switch off, that can be only

along with LP lube oil pump MBV21/22/23AP005 (both pumps with one group) 3- Close inlet valve MBV51/52/53AA005. 4- Close outlet valve MBV51/52/53AA015.

De- Isolation of lube oil pump MBV51/52/53AP005

1- Open inlet valve MBV51/52/53AA005. 2- Open outlet valve MBV51/52/53AA015. 3- Pump MBV51/52/53AP005 power supply and circuit breaker switch on.

UNote: be sure that the in group LP lube oil pump is normalized.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

Isolation of lube oil filter MBV40AT005/010

1- Be sure that the filter we are going to change over to, it is charged. 2- Close 3 way valve MBV40AA005,010 to the filter we isolate. 3- Close the equalizing valve MBV40AA015 4- Open drain valve MBV40AA235/240. 5- Open vent valve MBV40AA225/230. 6- The vent of the isolated filter is to be closed to keep the tank under vacuum

De- Isolation of lube oil filter MBV40AT005/010

1- Close drain valve MBV40AA235/240. 2- Open equalizing valve MBV40AA015 till the filter charged then close the equalizing valve.

Isolation of lube oil cooler MBV30AC005/010

1- Close closed cooling water inlet valve PGA51/52AA001. 2- Close closed cooling water outlet valve PGA53/54AA001. 3- Open closed cooling water drain valve PGA52/53AA201. 4- Close the equalizing valve MBV40AA015 if open 5- Close 3 way valve MBV30AA005,010 on the cooler we isolate. 6- Open drain valve MBV30AA210/215. 7- Open vent valve MBV30AA240/245.

De- Isolation of lube oil cooler MBV30AC005/010

1- Close drain valve MBV30AA210/215. 2- Open equalizing valve MBV30AA015. 3- When the cooler has been charged close equalizing valve MBV30AA015. 4- Close closed cooling water drain valve PGA52/53AA201. 5- Open closed cooling water inlet inlet valve PGA51/52AA001. 6- Open closed cooling water outlet valve PGA53/54AA001. 7- Compensate the pressure drop in the closed cooling water system.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UWATER INJECTION SYSTEM Isolation of water injection pump MBU30AP005

1- Stop the pump MBU30AP005. 2- Pump power supply and circuit breaker switch off. 3- Close inlet valve MBU30AA010. 4- Open drain valves MBU30AA205,215

De- Isolation of water injection pump MBU30AP005

1- Close drain valves MBU30AA205,215 2- Open inlet valve MBU30AA010. 3- Water injection pump power supply and circuit breaker switch on.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UGAS IGNITION SYSTEM Isolation of propane gas system

1- Close valve MBQ10AA030. 2- Close valve MBQ10AA050.

De- Isolation of propane gas system

1- Open MBQ10AA030. 2- Open MBQ10AA050.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

ULIQUID FUEL SYSTEM Isolation of liquid fuel filter MBN10AT005

1- Be sure that the other filter is charged. 2- Open the vent of the stand by filter till the fuel coming out 3- Close 3 way valves on the filter we isolate. 4- Open drain valve MBN10AA220/225. 5- Open vent valve MBN10AA235/240.

De- Isolation of liquid fuel filter MBN10AT005

1- Close drain valve MBN10AA220/225. 2- Open equalizing valve. 3- When the filter has been charged close vent valve MBN10AA235/240. 4- Close equalizing valve.

Isolation of fuel additive pump MBU10AP405

1- Stop the pump, and isolate(close) the instrument air valve, MBU10AA425 2- Pump power supply and circuit breaker switch off. 3- Close manual valves MBU10AA410,420. 4- Close outlet valve MBU10AA435. 5- Isolate the sight glass by closing the valve, mbu10aa420

De- Isolation of fuel additive pump MBU10AP405

1- Open manual valves MBU10AA410,420. 2- Open outlet valve MBU10AA435. 3- Pump power supply and circuit breaker switch on. 4- Open instrument air isolation valve. MBU10AA425


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

Isolation of fuel additive tank MBU10BB005

1- Stop fuel additive pump MBU10AP405, power supply and circuit breaker switch off. 2- Open outlet valves MBU10AA410,420. 3- Empty the tank by drain valve MBU10AA415. 4- Close instrument air isolation valve, MBU10AA425, 5- Close pump inlet isolation valve

De-Isolation of fuel additive tank MBU10BB005

1- Close drain valve MBU10AA415. 2- Fill the tank by manual pump MBU10AP403. 3- Open outlet valves MBU10AA410,420. 4- Pump MBU10AP405 power supply and circuit breaker switch on. 5- Open instrument air isolation valve, MBU10AA425

Isolation of fuel additive tank sight glass MBU10CF045

1- Close upper and lower isolation valves. 2- Open drain valve. 3- Drain can be done by disconnecting the outlet line

De- Isolation of fuel additive tank sight glass MBU10CF045

1- Close drain valve. 2- Open lower isolation valve. 3- Open upper isolation valve.

Isolation of fuel tank MBN10BB005

1- Unit shut down. 2- Pump MBN10AP005 power supply and circuit breaker switch off. 3- Close valve MBN10AA005 (from CCR). 4- Close valve MBN10AA030 (from CCR) and shut of valve MBN10AA025 5- Empty the tank by drain valve MBN10AA205.

De- Isolation of fuel tank MBN10BB005

1- Close drain valve MBN10AA205. 2- Open valve MBN10AA005 (from CCR).


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

3- Pump MBN10AP005 power supply and circuit breaker switch on.

UAIR INTAKE SYSTEM

Isolation of air intake system

1- GT must be shut down. 2- Stop fans MBL21,22,23,24AN005. 3- Fans power supply and circuit breaker switch off. 4- Close instrument air valve MBL20AA005.

De- Isolation of air intake system

1- Open instrument air valve MBL20AA005. 2- Fans power supply and circuit breaker switch on.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UHYDRAULIC SYSTEM

Isolation of hydraulic filter MAX72AT001

1- Stop circulation pump MAX71AP001. 2- Pump power supply and circuit breaker switch off.

De- Isolation of hydraulic filter MAX72AT001

1- Circulation pump MAX71AP001 power supply and circuit breaker switch on.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UST LUBE OIL SYSTEM Isolation of lube oil AC pumps MAV21/22AP005

1- Stop the pump. 2- circuit breaker switched off and rack out 3- Close outlet valve MAV21/22AA015. 4- Close inlet valve MAV21/22AA005.

De- Isolation of lube oil AC pump MAV21/22AP005

1- Open inlet valve MAV21/22AA005. 2- Slowly open outlet valve MAV21/22AA015. 3- Pump power supply and circuit breaker switch on.

Isolation of lube oil DC pump MAV23AP005

1- Power supply switch off. 2- Close outlet valve MAV23AA015. 3- Close inlet valve MAV23AA005.

De- Isolation of lube oil DC pump MAV23AP005

1- Open inlet valve MAV23AA005. 2- Open outlet valve MAV23AA015. 3- Power supply switch on.

Isolation of lube oil cooler MAV30AC005/010


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

1- Close valve MAV30AA015. 2- Close closed cooling inlet valve PGA21/22AA001. 3- Close closed cooling outlet valve PGA23/24AA001. 4- Open closed cooling drain valve PGA21/22AA201. 5- Close 3 way valve MBV30AA005 to the cooler we isolate. 6- Close 3 way valve MBV30AA010 to the cooler we isolate. 7- Open drain valve MBV30AA210/215. **** 8- Open vent valve MAV30AA220/225.

De- Isolation of lube oil cooler MAV30AC005/010

1- Close drain valve MBV30AA210/215. **** 2- Open equalizing valve MBV30AA015 to charge the cooler. 3- When the cooler has been charged close vent valve MAV30AA220/225 & equalizing valve

MBV30AA015. 4- Close closed cooling drain valve PGA21/22AA201. 5- Open closed cooling inlet valve PGA21/22AA001. 6- Slowly open closed cooling outlet valve PGA23/24AA001. 7- Compensate the pressure drop in the closed cooling system.

Isolation of lube oil filter MAV40AT005/010

1- Be sure that equalizing valve MAV40AA015 is closed. 2- Be sure that the other filter is charged. 3- Close 3 way valves MAV40AA005,010 to filter we isolate. 4- Open drain valve MAV40AA215/220. 5- Open vent valve MAV40AA205/210. 6- Open drain valve MAV40AA225/230.

De- Isolation of lube oil filter MAV40AT005/010

1- Close drain valve MAV40AA215/220. 2- Close drain valve MAV40AA225/230. 3- Open equalizing valve MAV40AA015. 4- When the filter has been charged, close vent valve MAV40AA205/210 & equalizing valve

MAV40AA015. Isolation of oil purifying unit


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

1- Stop the pump MAV16AP005, power supply and circuit breaker switch off. 2- Close inlet valve MAV16AA215. 3- Open filter MAV15AT005 drain valve.

**** To be checked De- Isolation of oil purifying unit

1- Close filter MAV15AT005 drain valve. 2- Open inlet valve MAV16AA215. 3- Pump MAV16AP005, power supply and circuit breaker switch on.

Isolation of jacking oil pump MBV80AP005

1- Stop the pump, power supply and circuit breaker switch off. 2- Close inlet valve MAV40AA005.

De- Isolation of jacking oil pump MBV80AP005

1- Open inlet valve MAV40AA005. 2- Pump power supply and circuit breaker switch on.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

UDEMI. WATER SYSTEM Isolation of Demi. Water pump 00GHC21/22AP001

1- Stop the pump 00GHC21/22AP001. 2- Pump power supply and circuit breaker switch off and racked out 3- Close suction valve 00GHC21/22AA001. 4- Close discharge valve 00GHC23/24AA002. 5- Open vent valve 00GHC23/24AA201.

De- Isolation of Demi. Water pump 00GHC21/22AP001

1- Open suction valve 00GHC21/22AA001. 2- When solid water comes through vent valve 00GHC23/24AA201 close it. 3- Open discharge valve 00GHC23/24AA002. 4- Pump power supply and circuit breaker switch on


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

EXTERNAL FUEL SYSTEMU

-Note:U All works to be done on fuel system MUST be cold work using hand tools only.

Isolation of unloading pump 00EGA05/10/15/20AP001

1- No fuel unloading on the filling unit to be isolated. 2- Put warning sign on the filling unit to be isolated (DO NOT USE). 3- Stop the pump, power supply and circuit breaker switch off. 4- Keep valve 00EGA05/15AA007 close. 5- Close outlet valve 00EGA05/10/15/20AA015. 6- Open vent valve 00EGA05/10/15/20AA240.**** 7- Open drain valve 00EGA05/10/15/20AA202. 8- Open drain valve 00EGA05/10/15/20AA205. 9- Open drain valve 00EGA05/10/15/20AA210.

De-Isolation of unloading pump 00EGA05/10/15/20AP001

1- Close drain valve 00EGA05/10/15/20AA205. 2- Open outlet valve 00EGA05/10/15/20AA015. 3- Pump power supply and circuit breaker switch on. 4- Connect the fuel supply (road tanker). 5- When no air is still present in the unloading station close vent valve

00EGA05/10/15/20AA240. 6- Close drain valve 00EGA05/10/15/20AA210 when solid liquid fuel comes through. 7- Start the pump if necessary. 8- Close drain valves, 00EGA05/10/15/20AA202

Isolation of fuel strainer 00EGA30AT005/010


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

1-Close isolation valves 00EGA30AA005,010/015,020. 2- Open drain valve 00EGA30AA205/210.

De-Isolation of strainer 00EGA30AT005/010

1- Close drain valve 00EGA30AA205/210. 2- Open isolation valve 00EGA30AA005,010/015,020.

Isolation of flow meter 00EGA30CF005/010

1- Close isolation valves 00EGA30AA025,030/035,040. 2- Open drain valve 00EGA30AA215/220.

De-Isolation of flow meter 00EGA30CF005/010

1- Close drain valve 00EGA30AA215/220. 2- Open isolation valves 00EGA30AA025,030/035,040.

Isolation of 3 way control valve 00EGA30AA050

1- No unloading unit should be in service. 2- Unloading pumps power supply and circuit breaker switch off. 3- Close valves 00EGA30AA025/035. 4- Close manual valves 00EGA35AA015,020 (on fuel storage tanks). 5- Open drain valves 00EGA30AA215,220.

De- Isolation of 3 way control valve 00EGA30AA050.

1- Close drain valves 00EGA30AA215,220. 2- Open valves 00EGA30AA025/035. 3- Open manual valves 00EGA35AA015,020 (on fuel storage tanks).

Isolation of 3 way motorized valve 00EGA15AA005

1- Stop transfer pumps 00EGC20,25AP005. 2- Transfer pumps power supply and circuit breaker switch off. 3- Close manual valves 00EGC05,10AA005 & 00EGA10AA006. 4- Close isolation valves 00EGC20,25AA005.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

5- Open drain valves 00EGC05,10AA203. 6- Open 3 way valve 00EGC15AA005 for full drain.

De- Isolation of 3 way motorized valve 00EGA15AA005

1- Close drain valves 00EGC05,10AA203. 2- Open manual valves 00EGC05,10AA005 & 00EGA10AA006. 3- Open isolation valves 00EGC20,25AA005. 4- Open filters 00EGC20,25AT005 vent valves 00EGC20,25AA205 till solid liquid fuel comes

then close them. 5- Release safety valves 00EGC05,10AA205 by pulling the lever till liquid fuel comes through

them. 6- Open isolation valves 00EGC20,20AA015. 7- Open vent valve 00EGA20AA217 till solid liquid fuel comes through then close it. 8- Transfer pumps power supply and circuit breaker switch on.

Isolation of transfer pump 00EGA20/25AP005

1- Pump power supply and circuit breaker switch off and racked out 2- Close isolation valve 00EGC20/25AA005. 3- Close isolation valve 00EGC20/25AA015. 4- Open drain valve 00EGC20/25AA215. 5- Open filter 00EGC20/25AT005 drain valve 00EGC20/25AA210. 6- Open filter 00EGC20/25AT005 vent valve 00EGC20/25AA205.

De- Isolation of transfer pump 00EGA20/25AP005.

A. System in service.

1- Close drain valve 00EGA20/25AA215. 2- Close filter 00EGC20/25AT005 drain valve 00EGC20/25AA210. 3- Open inlet valve 00EGC20/25AA005. 4- When solid liquid fuel comes through filter vent valve 00EGC20/25AA205 close it. 5- Slowly open discharge valve 00EGC20/25AA015. 6- Pump power supply and circuit breaker switch on.

B. System out of service.

1- Close drain valve 00EGA20/25AA215. 2- Close filter 00EGC20/25AT005 drain valve 00EGC20/25AA210. 3- Open inlet valve 00EGC20/25AA005.


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_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

4- When solid liquid fuel comes through filter vent valve 00EGC20/25AA205 close it. 5- Close manual valve 00EGC27,28AA005. 6- open discharge valve 00EGC20/25AA015. 7- Open vent valve 00EGC20AA217 till solid liquid fuel comes through, then close it. 8- Open manual valves 00EGC27,28AA005. 9- Transfer pump power supply and circuit breaker switch on.

Isolation of W/F separator 00EGC30/40/AT005 A. System in service

1- Seperator 00EGC30/40AT005 and fan 00EGC35/40AN005 power supply and circuit breaker switch off.

2- Close fuel inlet valve 00EGC35/40AA005. 3- Close fuel outlet valve 00EGC35/40AA020. 4- Close demi. water inlet valve 00EGC35/40AA025. 5- Close cooling water outlet valve 00EGC35/40AA275. 6- Close cooling water inlet valve 00EGC35/40AA270.

B. System out of service (isolation including all separator equipments)

1- Separator 00EGC30/40AT005 and fan 00EGC35/40AN005 power supply and circuit breaker switch off.

2- Sludge pump 00EGR15,20AP005 power supply switch off. 3- Cooling water pump 00EGC34AP005 power supply switch off. 4- Close fuel inlet valve 00EGC27AA005. 5- Close fuel outlet valve 00EGC55AA005. 6- Close demi. water inlet valves 00EGC32AA010,020. 7- Close fuel valves 00EGC53AA016,018. 8- Close sludge valves 00EGR15,20AA015. 9- Open drain valves 00EGC30,35,40AA405. 10- Close cooling water valve 00EGC34AA020.

De-isolation of W/F separator 00EGC35/40AT005 A. System in service

1- Open cooling water inlet valve 00EGC35/40AA270. 2- Open cooling water outlet valve 00EGC35/40AA275. 3- Open fuel inlet valve 00EGC35/40AA005. 4- Open fuel outlet valve 00EGC35/40AA020.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

5- Open demi. water inlet valve 00EGC35/40AA025. 6- Seperator 00EGC30/40AT005 and fan 00EGC35/40AN005 power supply and circuit

breaker switch on. B. System out of service

1- Close drain valves 00EGC30,35,40AA405. 2- Open cooling water valve 00EGC34AA020. 3- Open fuel inlet valve 00EGC27AA005. 4- Open fuel outlet valve 00EGC55AA005. 5- Open fuel valves 00EGC53AA016,018. 6- Open demi. water valves 00EGC32AA010,020. 7- Open sludge valves 00EGR15,20AA015. 8- Cooling water pump 00EGC34AP005 power supply switch on. 9- Sludge pump 00EGR15,20AP005 power supply switch 10- Seperator 00EGC30/40AT005 and fan 00EGC35/40AN005 power supply and circuit breaker switch on.

Isolation of fuel heater EGC95AC005/010

A. System in service 1- Heater EGC95AC005/010 power supply switch off and circuit breaker rack out. 2- Open bypass valve 00EGCAA015/030. 3- Close inlet valve 00EGC95AA005/020. 4- Close outlet valve 00EGC95AA010/025. 5- Open vent valve 00EGC95AA230/235. 6- Open drain valves 00EGC95AA210/220. 7- Be sure that other heater bypass valve 00EGCAA030/015.

B. Both heaters out of service, but system in service

1- Heaters EGC95AC005,010 power supply switch off and circuit breaker rack out. 2- Open bypass valves 00EGC95AA015,030. 3- Close isolation valves 00EGC95AA005,025. 4- Open vent valves 00EGC95AA230,235. 5- Open drain valves 00EGC95AA210,220.

De- Isolation of fuel heater EGC95AC005/010


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

A. System in service (other heater is in service)

1- Close drain valve 00EGC95AA210/220. 2- Open inlet valve 00EGC95AA005/020. 3- Open outlet valve 00EGC95AA010/025. 4- Close bypass valve 00EGC95AA015/030. 5- When solid liquid fuel comes through vent valve 00EGC95AA230/235 close it. 6- Heaters EGC95AC005,010 power supply and circuit breaker switch on.

B. System out of service (both heaters out of service)

1- Close drain valves 00EGC95AA210,220. 2- Open isolation valves 00EGC95AA005,025. 3- Close bypass valves 00EGC95AA015/030. 4- When solid liquid fuel comes through vent valves 00EGC95AA230,235 close them. 5- Heaters EGC95AC005,010 power supply and circuit breaker switch on.

Isolation of coalescher pump 00EGC85/90AP005

1- Stop the pump 00EGC85/90AP005 2- Pumps power supply and circuit breaker switch off. 3- Close inlet valve 00EGC85/90AA005. 4- Close outlet valve 00EGC85/90AA015. 5- Open drain valve 00EGC85/90AA210. 6- Open drain valve 00EGC85/90AA215.

De- Isolation of coalescher pump 00EGC85/90AP005

1- Close drain valve 00EGC85/90AA210. 2- Open inlet valve 00EGC85/90AA005. 3- When solid liquid fuel comes through upper drain valve 00EGC85/90AA215 close it. 4- Open outlet valve 00EGC85/90AA015. 5- Pumps power supply and circuit breaker switch on.

Isolation of coalescher filter 00EGC85AT010

1- Be sure that the other filter is charged. 2- Close 3 way valve to filter to be isolated. 3- Open drain valve 00EGC85AA220/035.


GAZA


_________________________________________________________________________________________ GPGC SOP-019 of 46 MAR, 2010

4- Open vent valve on the top of the filter. 5- Open drain valve 00EGC85AA225/230. 6- Keep equalizing valve closed.

De- Isolation of coalescher filter 00EGC85AT010

1- Close drain valve 00EGC85AA225/230. 2- Close drain valve 00EGC85AA220/035. 3- Open equalizing valve. 4- When solid liquid fuel comes through the vent valve at the top of the filter, close it. 5- Close equalizing valve.

Isolation of sludge pump 00EGR40AP005

1- Stop the pump. 2- Pump power supply and circuit breaker switch off. 3- Close inlet valve 00EGR40AA005. 4- Close outlet valve 00EGR40AA010. 5- Open drain valve 00EGR40AA205.

De- Isolation of sludge pump 00EGR40AP005

1- Close drain valve 00EGR40AA205. 2- Open inlet valve 00EGR40AA005. 3- Open outlet valve 00EGR40AA010. 4- Pump power supply and circuit breaker switch on.

isolation / de isolation procedure - gpgc sop-019-isol, de-isol...1- stop the pump. 2- electrically,...

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