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FLUSHING GUIDELINE B&E CLASS GAS TURBINE

FLUSHING GUIDELINE B&E CLASS GAS TURBINE

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Commissioning Guideline GPO / GFO / M&I 403A5502 Revision: A Unit: B & E GT Page : 1 / 32

Flushing Guideline B & E-Class Gas Turbine

Observations :

This document, sole property of our company, is strictly confidential. It must not be

communicated, copied or reproduced without our written consent.

Ce document, proprit exclusive de notre Socit, est strictement confidentiel. Il ne peut

tre communiqu, copi ou reproduit sans notre autorisation crite.

Este documento, proprietad exclusiva de nuestra Compania, es estricamente confidential. No puede

ser communicado, copiado o reproducido sin su autorizacion escrita.

1 GENERAL INFORMATION:

1.1 Purpose of the document: The purpose of this document is to guide trained, qualified and authorized GE-commissioning engineers or GE-technical advisors (TA) or GE-supervisors to perform the various flushing required during the start-up of a power plant. It has to be adapted according to site conditions and discussed with mechanical team to match specific site configuration.

Photos and drawings provided in this document are not contractual, they are only given to show how to install flushing parts and they may not reflect site reality as connections may differ depending supplier selected.

Gas turbine, generator and skids are generally delivered at site in a clean condition. Flushing at site concerns mainly the off base piping. As per design, pipes used for on-base piping are stainless steel or already factory cleaned. In spite of keeping pipes in a clean condition during installation, dust and debris may remain inside the system; therefore the purpose of flushing is to remove these foreign particles. Piping lengths which cannot be flushed are blown with compressed air and visually inspected.

It is once more recalled that during construction, piping must be stored in dry, dustless and safe area (shelter is recommended), plugged at each end with relevant caps.

This document can be used as a check-list during flushing, but it is not an official record of the operation. The official record is the commissioning book of the unit that must include evidence of flushing and results.

1.2 Safety policy: All EHS (Environment, Hygiene and Safety) rules and recommendations, recorded in the EHS Construction Plan must be applied, particularly wearing required PPE (Personal Protective Equipment). No job can be started if people or equipment safety is compromised. This is a GE Global Policy requirement and nothing can lead to ignore these safety rules.

Commissioning activity generates mainly 2 types of risk: Electrical hazards: all needed precautions have to be taken to avoid contact with electrical parts

under voltage. Be conscious that on generator, residual voltage is present even if machine is at standstill and not excited ; Mechanical hazards: all needed precautions have to be taken to prevent contact with rotating parts

(shaft line, motor, pumps, etc.).

1.3 Flushing acceptance criteria: For all circuits, please refer to GEK-110483 for flushing acceptance criteria to be met. The criteria mentioned in this guideline are for information only and must be verified with the latest version of the GEK before use.

DT-7C



Observations :







1.4 Summary: 1 General Information: .................................................................................................................................... 1

1.1 Purpose of the document: .................................................................................................................... 11.2 Safety policy:........................................................................................................................................ 11.3 Flushing acceptance criteria: ............................................................................................................... 11.4 Summary: ............................................................................................................................................. 21.5 Revision status: ................................................................................................................................... 3

2 Lube Oil Flushing: ........................................................................................................................................ 42.1 Safety complement: ............................................................................................................................. 42.2 Acceptance Criteria: ............................................................................................................................ 42.3 Flushing process for B-class unit: ........................................................................................................ 52.4 Flushing process for E-class unit: ...................................................................................................... 122.5 Lube oil flushing record sheet: ........................................................................................................... 21

3 Gas Fuel Flushing: ..................................................................................................................................... 223.1 Safety complement: ........................................................................................................................... 223.2 Acceptance Criteria: .......................................................................................................................... 223.3 Gas fuel flushing: ............................................................................................................................... 22

4 Liquid Fuel Flushing: .................................................................................................................................. 234.1 Safety complement: ........................................................................................................................... 234.2 Acceptance Criteria: .......................................................................................................................... 234.3 Flushing process: ............................................................................................................................... 234.4 Flushing completion: .......................................................................................................................... 26

5 Water-Cooling Flushing: ............................................................................................................................ 275.1 Safety complement: ........................................................................................................................... 275.2 Acceptance Criteria: .......................................................................................................................... 275.3 Flushing Process: .............................................................................................................................. 275.4 Flushing completion: .......................................................................................................................... 31

6 Reference Documents: .............................................................................................................................. 32



Observations :







1.5 Revision status:

REV. DATE (dd/mm/yyyy) DOCUMENT OBJET

A 02/04/2012 Flushing guideline First issue BR


Flushing Guideline Lube Oil Flushing

Observations :







2 LUBE OIL FLUSHING:

2.1 Safety complement: Oil generates mainly 3 types of risk:

Pollution: all precautions must be taken to avoid accidental leakages and spillage during preliminary tests. These safety precautions must be taken regarding the HSE Plan of the site and the local regulation. Pollution fighting means (basin, absorbent, etc.) must be available near the hazardous area. Fire: oil does not present fire risk by itself. Risks can arise when oil is near an ignition source (heat,

spark, naked flame, etc.). Respect of work permit and particularly, hot work permit should allow to bring the risk under control. Firefighting means (hydrocarbon fire extinguishers, sand, etc.) must be available near the hazardous area. Chemical: please refer to Material Safety Datasheet and take required precautions

2.2 Acceptance Criteria: GEK-110483 reminds what the acceptance criteria are for the cleanliness of the lube-oil and HP-oil systems. It also provides guidelines to evaluate this cleanliness.



Observations :







2.3 Flushing process for B-class unit: GT flushing is performed with operating oil, except if dedicated flushing load is specified by the contract. GT lube oil tank, GT auxiliary lube oil pump (88QA) and GT lube oil filters can be used for the flushing process. The oil demister (88QV) must not be used during the flushing. Main lube oil filter must be equipped with standard cartridges which are replaced after flushing completion as per MLI106.

Before flushing, take samples of the clean oil using procedure 91-438752 as a guideline. Use a clean, dry and appropriated recipient. Do not spoil sample with a dirty filing pipe / point. Ensure the dead volume between circulating line and sampling point has been flushed prior to take sample. Keep oil samples in a clean and safe place (respect EHS rules) during the total presence of GE Personnel at site. Protect samples from direct sun light.

During flushing, oil temperature must be higher than 40C. Lube oil flows through coolers with cooling water not running. If oil tank heaters are used to warm up flushing oil, this important guideline must be followed:

Lube oil level must be higher than the heaters when pump 88 QA is running. Lube oil must circulate when heaters are switched on. Heaters should be switched off when oil temperature reaches 54C. Oil temperature must not be over SpeedTronic alarm.

A temporary emergency push button to stop lube oil pump may be installed in the auxiliary compartment. Flushing supervisor and watchers must know where and how to stop the lube oil pump.

To insure a sufficient flow, flushing is performed in two main sequences: Phase 1: bearing #2 & load gear by-passed, generator line blocked Phase 2: bearing #2 & generator bearings by-passed, load-gear blocked

According to site experience, if all the necessary precautions have been taken during installation to keep piping in a clean condition, the minimum flushing durations are:

12 hours for phase 1 12 hours for phase 2

Remaining short length of feeding pipes, not flushed with a lube oil flow, must be cleaned using 6 bars compressed air and installed after visual inspection.

During flushing, parameters must be monitored and recorded frequently (15 minutes). Pump motor amps must be monitored at every change in the flushing circuit to be sure that full load amps are not exceeded. Proceed to phases 1 and 2 of the flushing sequences (See hereafter for a detailed procedure).

NB: Bearing #1 feeding pipe is not specifically flushed at site as the auxiliary module comes coupled with the gas turbine. The oil circulates through the bearing #1 during the 2 flushing phases.



Observations :







2.3.1 Mechanical preparation Phase 1:

General view of 6B turbine oil system

Remove all servo valves, and install relevant flushing blocks and gaskets Keep servo valves in a plastic bag to avoid any contamination. Make sure not to lose any O-ring gaskets.



Observations :







Disconnect feeding line to bearing #2, to allow oil to flow in the return line

Detail Bearing #2 feeding line WITH gap

By-pass the load gear and close the inlet (use relevant drawing for construction of blue pipe)



Observations :







Install a system to take sample at the oil pump outlet Disconnect and plug the control line of VPR2-1 to allow this valve to stay fully open during flushing

Set the transfer valves to one cooler, one main filter, and one HP filter Close inlet valve of torque converter strainer Check that electrical power supply is available for AC lube oil pump and heaters Check GT auxiliaries frame earth connections Check that the filters are equipped with cartridges :

o Lube oil filter #1 o Lube oil filter #2



Observations :







o HP oil filter #1 o HP oil filter #2 Check that the low tank drain pipes are closed and locked Check the cleanliness of the tank before filling up (you might perform TEP01 and tank inspection

before) Fill up the tank with 6000 liters (30 drums) of oil. (the quantity of oil used for flushing may be less

important than final load)

2.3.2 Flushing Phase 1: Walk-down all the lines, including instrumentation lines, to prevent any risk of leakages Proceed to motor-heater tests if not done (see TPE01 and TEP02) Start the lube oil pump (88QA-1). Check for leak. The motor AC current should not be higher than

nominal current. During flushing sequence, record AC current, oil pressure, oil temperature, oil filter pressure

drop, according to data sheets hereafter. Flushing is completed when oil sample reach GEK-110483 criteria

Flushing phase 1 completion date:

2.3.3 Mechanical preparation Phase 2: Apply proper LOTO procedures Keep by-pas at bearing #2 Prepare generator for flushing:

o Remove load gear by-pass and block inlet and outlet o Open generator feeding and return lines o By-pass feed lines to return lines as close as possible from the bearings



Observations :









Observations :







2.3.4 Flushing Phase 2: Start the lube oil pump (88QA-1). Check for leak. The motor AC current should not be higher than


drop, according to data sheets hereafter. Flushing is completed when oil sample reach GEK-110483 criteria.


2.3.5 Flushing completion: Remove all blank plates special fitting and by-pass Restore all piping and check the system conformity according to P&ID (orifice plates, instrumentation),

do not forget VPR2-1 control line Regarding jacking oil, length of site installed tubing must be air blown and thoroughly inspected before

final installation. Run 88 HQ pump for 2 hours. Carefully monitor 88 HQ motor current and HP filter differential

pressure: o If differential pressure is above 4 bars investigate for any concern (leaks, opened valves in

instrument lines, filters clogged, etc), change filter if clogged. o Run 88HQ till differential pressure is normal (see item 0414) o While performing hydraulic oil flushing, jacking oil length of site installed tubing should be

flushed with jacking oil pumps Reinstall servo valves Drain the filters Replace lube oil main filter cartridges Add oil in the tank After restoration, check for any leak and verify bearings return oil flow through sight glasses. Check the oil tank level, 10 minutes after stopping the pump, and adjust it if necessary.

Flushing restoration completed date:



Observations :







2.4 Flushing process for E-class unit: GT flushing is performed with operating oil, except if dedicated flushing load is specified by the contract. GT lube oil tank, GT auxiliary lube oil pump (88QA) and GT lube oil filters can be used for the flushing process. The oil demister (88QV) must not be used during the flushing. Main lube oil filter must be equipped with standard cartridges which are replaced after flushing completion as per MLI106.

Before flushing, take samples of the clean oil using procedure 91-438752 as a guideline. Use a clean, dry and appropriated recipient. Do not spoil sample with a dirty filing pipe / point. Ensure the dead volume between circulating line and sampling point has been flushed prior to take sample. Keep oil samples in a clean and safe place (respect EHS rules) during the total presence of GE Personnel at site. Protect samples from direct sun light.

During flushing, oil temperature must be higher than 40C. Lube oil flows through coolers with cooling water not running. If oil tank heaters are used to warm up flushing oil, this important guideline must be followed:

Lube oil level must be higher than the heaters when pump 88 QA is running. Lube oil must circulate when heaters are switched on. Heaters should be switched off when oil temperature reaches 54C. Oil temperature must not be over SpeedTronic alarm.

A temporary emergency push button to stop lube oil pump may be installed in the auxiliary compartment. Flushing supervisor and watchers must know where and how to stop the lube oil pump.

To insure a sufficient flow, flushing is performed in two main sequences: Phase 1: gas turbine bearings #2 and #3 feeding lines, Phase 2: gas turbine bearing #3 and generator bearings feeding lines.

According to site experience, if all the necessary precautions have been taken during installation to keep piping in a clean condition, the maximum average time to flush is around 48 hours circulation. However, the minimum flushing durations are:

12 hours for phase 1 12 hours for phase 2

Remaining short length of feeding pipes, not flushed with a lube oil flow, must be cleaned using 6 bars compressed air and installed after visual inspection.

During flushing, parameters must be monitored and recorded frequently (15 minutes). Pump motor amps must be monitored at every change in the flushing circuit to be sure that full load amps are not exceeded. Proceed to phases 1 and 2 of the flushing sequences (See hereafter for a detailed procedure).

NB: Bearing #1 feeding pipe is not flushed at site but has to be cleaned by hand, air-blown and carefully inspected before final installation.



Observations :







2.4.1 Mechanical preparation Phase 1:

General view of 9E turbine oil system



Observations :







For 9E-frame, material is part of MLI A125 Remove all servo valves, and install relevant flushing blocks and gaskets

Keep servo valves in a plastic bag to avoid any contamination. Make sure not to lose any O-ring gaskets. Disconnect feeding line to the gas module (if part of the requisition), to allow oil to flow in the return

line

Detail A Gas module connection WITH gap

Install a closure plate in GT Bearing #1 feeding line

Detail E Bearing #1 feeding line blocked



Observations :







Install a blank plate in GT Bearing #2 feeding line, leave a gap for lube oil flowing to return line

Detail B Bearing #2 feeding line WITH gap

Disconnect feeding line to bearing #3, to allow oil to flow in the return line

Detail C Bearing #3 feeding line WITH gap



Observations :







Disconnect IGV connections and partially plug them

Detail D IGV connection PARTIALLY plugged

Install bypasses made on site on each generator bearing to prevent oil from going into the bearing (U-pipe between supply and return line) Leave valves closed if any. Check that generator lifting oil feeding pipe is closed or plugged on supply side

Generator bearing #4 (turbine side)



Observations :







Generator bearing #5 (excitation side)

Install a system to take sample at the oil pump outlet Disconnect and plug the control line of VPR2-1 to allow this valve to stay fully open during flushing

Set the transfer valves to one cooler, one main filter, and one HP filter Close inlet valve of torque converter strainer Check that electrical power supply is available for AC lube oil pump and heaters Check GT auxiliaries frame earth connections Check that the filters are equipped with cartridges :

o Lube oil filter #1 o Lube oil filter #2 o HP oil filter #1 o HP oil filter #2 Check that the low tank drain pipes are closed and locked Check the cleanliness of the tank before filling up (you might perform TEP01 and tank inspection

before) Fill up the tank with 10000 liters (50 drums) of oil. (the quantity of oil used for flushing may be less

important than final load)



Observations :







2.4.2 Flushing Phase 1: Walk-down all the lines, including instrumentation lines, to prevent any risk of leakages Proceed to motor-heater tests if not done (see TPE01 and TEP02) Start the lube oil pump (88QA-1). Check for leak. The motor AC current should not be higher than




2.4.3 Mechanical preparation Phase 2: Apply proper LOTO procedures Install a plug to the gas module (if part of the requisition)

Detail A Gas module connection WITHOUT gap

Keep the blank plate in GT Bearing #1 feeding line



Observations :







Keep the blank plate and close the gap at GT Bearing #2

Detail B Bearing #2 feeding line WITHOUT gap

Keep the by-pass in the GT Bearing #3 feeding line

Plug the remaining IGV connections

Detail D IGV connection TOTALLY plugged

Open valves located in generator bearings bypasses



Observations :







2.4.4 Flushing Phase 2: Start the lube oil pump (88QA-1). Check for leak. The motor AC current should not be higher than




2.4.5 Flushing completion: Remove all blank plates special fitting and by-pass Restore all piping and check the system conformity according to P&ID (orifice plates, instrumentation),

do not forget VPR2-1 control line Regarding jacking oil, length of site installed tubing must be air blown and thoroughly inspected before

final installation. Run 88 HQ pump for 2 hours. Carefully monitor 88 HQ motor current and HP filter differential

pressure: o If differential pressure is above 4 bars investigate for any concern (leaks, opened valves in

instrument lines, filters clogged, etc), change filter if clogged. o Run 88HQ till differential pressure is normal (see item 0414 ) o While performing hydraulic oil flushing, jacking oil length of site installed tubing should be

flushed with jacking oil pumps Reinstall servo valves Drain the filters Replace lube oil main filter cartridges Add oil in the tank After restoration, check for any leak and verify bearings return oil flow through sight glasses. Check the oil tank level, 10 minutes after stopping the pump, and adjust it if necessary.

Flushing restoration completed date:



Observations :







2.5 Lube oil flushing record sheet:

LUBE OIL FLUSHING PHASE #________

DATE TIME 88 QA / AC CURRENT LUBE OIL

TEMPERATURE88QA

OUTLET PRESSURE

OIL FILTER PRESSURE

DROP


Flushing Guideline Gas Fuel Flushing

Observations :







3 GAS FUEL FLUSHING:

3.1 Safety complement: Please be remembered that flammable gas blows are prohibited on GE sites and that

GE personal cannot stay at site if such means are used for gas pipes cleaning.

Please refer to GEK-116771: GE Energy recommendations, Fuel Supply System Cleaning for Gas Turbines and EPRI Guideline 1023628: Guidelines for Fuel Gas Line Cleaning Using Compressed Air or Nitrogen for more details on proved alternative cleaning methods

Fuel gas generates mainly 2 types of risk: Fire or explosion hazards: all needed precautions have to be taken to avoid fire or explosion at

site, especially when working on Gas, Liquid Fuel, Oil systems ; risks can arise when gas is near an ignition source (heat, spark, naked flame, etc.). Respect of work permits and particularly, hot work permits should allow to bring the risk under control.

3.2 Acceptance Criteria: GEK-110483 reminds what the acceptance criteria are for the cleanliness of the gas system. It also provides guidelines to evaluate this cleanliness.

3.3 Gas fuel flushing: Our recommendation for the cleaning of the gas system is to perform air-blows of limited lengths of pipes. These air-blows will allow chasing out most of the pieces left in the pipes during erection. We want to emphasize once more that building a clean circuit makes it easier and cheaper to clean by reaching the acceptance criteria quicker.

The 2 documents cited in the first part of this section are explicit enough and we do not want to reproduce them here. Please refer to these documents to perform the safest and the most efficient cleaning as possible.


Flushing Guideline Liquid Fuel Flushing

Observations :







4 LIQUID FUEL FLUSHING:

4.1 Safety complement: Light Distillate Oil and Heavy Fuel Oil generate mainly 3 types of risk:

Pollution: all precautions must be taken to avoid accidental leakages and spillage during preliminary tests. These safety precautions must be taken regarding the HSE Plan of the site and the local regulation. Pollution fighting means (basin, absorbent, etc.) must be available near the hazardous area. Fire: oil does not present fire risk by itself. Risks can arise when oil is near an ignition source (heat,

spark, naked flame, etc.). Respect of work permit and particularly, hot work permit should allow to bring the risk under control. Firefighting means (hydrocarbon fire extinguishers, sand, etc.) must be available near the hazardous area. Chemical: please refer to Material Safety Datasheet and take required precautions

4.2 Acceptance Criteria: GEK-110483 reminds what the acceptance criteria are for the cleanliness of the fuel oil system. It also provides guidelines to evaluate this cleanliness.

4.3 Flushing process: Liquid fuel systems flushing are performed with light distillate oil. The existing tank and the LDO forwarding pumps (centrifugal) may be used for flushing. Tank level must be sufficient to ensure proper circulation without priming problem. Please note that in the case there are 2 liquid fuels (LDO and HFO for example), it can be interesting to flush the 2 feeding lines at the same time to maximize flow. Once feeding lines are clean, return lines are flushed in a second phase.

Please note that in case of 2 liquid fuels (LDO + HFO), HFO volumetric pump must not be used to flush HFO lines with LDO. There is a high risk of damaging the pumps.



Observations :







4.3.1 Mono-liquid fuel system:

4.3.2 Bi-liquid fuel system:



Observations :







4.3.3 Mechanical preparation for Off-base flushing:

4.3.3.1 Mono-liquid fuel system: Mechanical preparation consists mainly in following items:

Check that baskets are present in forwarding pumps strainers Add a by-pass on fuel heaters Add a by-pass on filtering skid Add a filter system on the return line to prevent pollution of the tank, this system must be isolable to

clean the filter without emptying the lines Ensure that any leakage on flanges will be recovered (basin + mechanical helpers)

By-pass for LDO heating skid By-pass for LDO Filtering skid



Observations :







4.3.3.2 Bi-liquid fuel system: Mechanical preparation consists mainly in following items:

Add a by-pass on fuel heaters Add a by-pass on filtering skid Add a filter system on the return line to prevent pollution of the tank, this system must be isolable to

clean the filter without emptying the lines and return to HFO tank Ensure that any leakage on flanges will be recovered (basin + mechanical helpers)

Please note that in both cases, the stainless steel pipe between the filtration skid and the unit must be air-blown and carefully inspected prior to final assembly.

4.3.4 Off-base flushing: Ensure proper commissioning of at least one forwarding pump (see TEP01 & TEP02) Start one pump and circulate fuel till filters are clogged Clean the filters and star again circulation till filters GEK-110483 criteria are met

To be more efficient it is possible to use the 2 LDO forwarding pumps in parallel, current must be carefully monitored to avoid electric motor overheat and damage.

Off-base flushing completed on the:

4.3.5 On-base flushing: For On-base flushing, please refer to document 586A1072: Liquid Fuel Flushing Procedure. This document is not dedicated to B and E-Class units but can provides guideline if you have any doubt on the On-Base cleanliness.

On-base flushing completed on the:

4.4 Flushing completion: When both Off-base and On-base flushing are completed, commissioning can be initiated.


Flushing Guideline Water-Cooling Flushing

Observations :







5 WATER-COOLING FLUSHING:

5.1 Safety complement: Cooling water generates mainly 2 risks:

Burn: all precautions must be taken to avoid contact with hot pipes and hot water at release points. If permanent barriers or insulation are not in place, use temporary signalization to prevent access to hazardous zone (for example vent of the heat-exchanger on atomizing air cooler) Chemical: please refer to Material Safety Datasheet and take required precautions

5.2 Acceptance Criteria: GEK-110483 reminds what the acceptance criteria are for the cleanliness of the fuel oil system. It also provides guidelines to evaluate this cleanliness.

5.3 Flushing Process: Please note that for some 6B units with only shaft-driven water cooling pump, you will need to use an external skid for the flushing of the circuit. Truck equipped with autonomous pumps and separated tanks is a good option to save time and money when this case arises.

If your cooling water installation has its own circulating pumps, you may proceed as follows.



Observations :







5.3.1 Mechanical preparation for phase 1 flushing:



Observations :









Observations :







Mechanical preparation consists mainly in following items: Check that witch hats are installed upstream circulating pumps

Install by-pass on generator coolers (install vent points if needed) Install by-pass on turbine coolers (Remove VTR1-1 and VTR2-1) Install by-pass on finfan radiators Close valves to flame detectors Close valves to HP fuel pump (HFO option) Close line to fuel check valve coolers (Liquid option) and close valve on the return line

Generator By-pass FinFan Cooler By-pass

5.3.2 Phase 1 flushing (Turbine On-base then generator piping): Ensure proper commissioning of at least one circulating pump (see TEP01 & TEP02) Close valves to generator coolers to maximize flow in turbine Start one pump and circulate water till filters are clogged, monitor pressure and noise to keep safe

situation (site experience proved that first runs can stay less than 15 seconds!) Clean the filters and start again circulation till filters can run 2 hours without dirt inside Open valves to generator and close valves to turbine to maximize flow in generator piping Start one pump and circulate water till filters are clogged, monitor pressure and noise to keep safe

situation (site experience proved that first runs can stay less than 15 seconds!) Clean the filters and start again circulation till filters can run 2 hours without dirt inside



Observations :







5.3.3 Mechanical preparation for phase 2 flushing (Finfan radiators): Apply needed LOTO procedure to change configuration Remove Finfan radiators by-pass

5.3.4 Phase 2 flushing (Finfan radiators): Start one pump and circulate water till filters are clogged, monitor pressure and noise to keep safe


5.3.5 Mechanical preparation for normalization: Apply needed LOTO procedure to change configuration Remove all by-pass Install VTR1-1 and VTR2-1

Open valves to HP fuel pump Remove plug to fuel check valve coolers (optional) and open the return line Fill the circuit with clean tap water

5.3.6 Phase 3 flushing: Open all valves to get final configuration (force open the solenoid valve to optional fuel check valve

coolers) Start one pump and circulate water till filters are clogged, monitor pressure and noise to keep safe


5.4 Flushing completion: When circulation can be let for several hours a day without filters clogged, the flushing is considered OK. Normalize the circuit and circulate in normal configuration.

Change water for demineralized one and add needed chemicals according procedure #249A4685

Cooling water flushing completion date:


Flushing Guideline Reference Documents

Observations :







6 REFERENCE DOCUMENTS: Please find here below the list of the documents used to establish this guideline. Please check that there are still up-to-date prior to use information published in this guideline.

EPRI Guideline 1023628 (Update Dec. 2011): Guidelines for Fuel Gas Line Cleaning Using Compressed Air or Nitrogen. EPRI, Palo Alto, CA: 2011

GE Energy drawing # 145E6599 (Rev.A): Piping Lube-Oil Flush Field (6B)

GE Energy drawing #249A4685 (Rev.A): Commissioning Manual Cooling Water Chemicals GE Water

GE Energy drawing #586A1072 (Rev.B): Liquid Fuel Flushing Procedure

GE Energy drawing #91-438752 (Rev.C): Monitoring of Lubricating Oil

GE Energy GEK-110483 (Rev.D): Cleanliness Requirements for Power Plant Installation, Commissioning, and Maintenance

GE Energy GEK-116771 (Dec. 2012): GE Energy recommendations, Fuel Supply System Cleaning for Gas Turbines

GE Energy GEK-116944 (Nov.2011): Flushing Recommendations for Turbine Lube Oil Systems with Motor Driven Main Oil Pumps

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