GE Frame 5 Service Manual

							47
List of Figures
Figure 1. Key factors affecting maintenance planning
Figure 2. Key technical reference documents to include in 
maintenance planning
Figure 3. 7E.03 gas turbine borescope inspection access locations
Figure 4. Borescope inspection planning
Figure 5. Causes of wear – hot gas path components
Figure 6. GE bases gas turbine maintenance requirements on 
independent counts of starts and hours
Figure 7. Hot gas path maintenance interval comparisons. GE 
method vs. EOH method
Figure 8. Maintenance factors
Figure 9. GE maintenance intervals
Figure 10. Estimated effect of fuel type on maintenance
Figure 11. Peak fire severity factors - natural gas and light distillates
Figure 12. Firing temperature and load relationship – heat recovery 
vs. simple cycle operation
Figure 13. Exhaust temperature control curve – dry vs. wet control 
7E.03
Figure 14. Peaking-fast start factors
Figure 15. 7F.03 fast start factors
Figure 16. Turbine start/stop cycle – firing temperature changes
Figure 17. Second stage bucket transient temperature distribution
Figure 18. Bucket low cycle fatigue (LCF)
Figure 19. Low cycle fatigue life sensitivities – first stage bucket
Figure 20. Maintenance factor – trips from load
Figure 21. Maintenance factor – effect of start cycle maximum load 
level
Figure 22. Operation-related maintenance factors
Figure 23. 7F gas turbine typical operational profile
Figure 24. Baseline for starts-based maintenance factor definition
Figure 25. DLN combustion mode effect on combustion hardware 
life
Figure 26. F-class axial diffuser 
Figure 27. E-class radial diffuser
Figure 28. Maintenance factor for overspeed operation ~constant 
TF
Figure 29. Deterioration of gas turbine performance due to 
compressor blade fouling
Figure 30. Long-term material property degradation in a wet 
environmentFigure 31. Susceptibility of compressor blade materials and 
coatings
Figure 32. 7E.03 heavy-duty gas turbine – disassembly inspections
Figure 33. Operating inspection data parameters
Figure 34. Combustion inspection – key elements
Figure 35. Hot gas path inspection – key elements
Figure 36. Stage 1 bucket oxidation and bucket life
Figure 37. Gas turbine major inspection – key elements
Figure 38. First-stage nozzle repair program: natural gas fired – 
continuous dry – base load
Figure 39. Baseline recommended inspection intervals: base load – 
natural gas fuel – dry
Figure 40. Combustion inspection hours-based maintenance 
factors
Figure 41. Combustion inspection starts-based maintenance 
factors
Figure 42. Hot gas path maintenance interval: hours-based criterion
Figure 43. Hot gas path maintenance interval: starts-based criterion
Figure 44. Rotor maintenance interval: hours-based criterion
Figure 45. Rotor maintenance interval: starts-based criterion
Figure D-1. Estimated repair and replacement intervals
Figure D-2. Estimated repair and replacement intervals
Figure D-3. Estimated repair and replacement intervals
Figure D-4. Estimated repair and replacement intervals
Figure D-5. Estimated repair and replacement intervals
Figure D-6. Estimated repair and replacement intervals
Figure D-7. Estimated repair and replacement intervals
Figure D-8. Estimated repair and replacement intervals
Figure D-9. Estimated repair and replacement intervals
Figure D-10. Estimated repair and replacement intervals
Figure D-11. Estimated repair and replacement intervals
Figure E-1. Borescope inspection access locations for 6F machines
Figure E-2. Borescope inspection access locations for 7F and 9F 
machines
Figure F-1. Turning gear guidelines
Figure G-1. F-class gas turbine naming
Figure G-2. B/E-class gas turbine naming
GE Power & Water | GER-3620M (00015001200140018
)  
						

							48
Revision History
9/89 Original
8/91 Rev A
9/93 Rev B
3/95 Rev C
•	Nozzle Clearances section removed
•	 Steam/Water Injection section added
•	 Cyclic Effects section added
5/96 Rev D
•	 Estimated Repair and Replacement Cycles added for F/FA
11/96 Rev E
11/98 Rev F
•	 Rotor Parts section added
•	 Estimated Repair and Replace Cycles added for FA+E
•	 Starts and hours-based rotor maintenance interval
equations added
9/00 Rev G
11/02 Rev H
•	 Estimated Repair and Replace Cycles updated and moved to
Appendix D
•	 Combustion Parts section added
•	 Inlet Fogging section added
1/03 Rev J
•	 Off Frequency Operation section added
10/04 Rev K
•	 GE design intent and predication upon proper components
and use added
•	 Added recommendation for coalescing filters installation
upstream of gas heaters
•	 Added recommendations for shutdown on gas fuel, dual fuel
transfers, and FSDS maintenance
•	 Trip from peak load maintenance factor added
•	 Lube Oil Cleanliness section added
•	 Inlet Fogging section updated to Moisture Intake
•	 Best practices for turning gear operation added
•	 Rapid Cool-down section added •	
Procedural clarifications for HGP inspection added
•	 Added inspections for galling/fretting in turbine dovetails to
major inspection scope
•	 HGP factored starts calculation updated for application of
trip factors
•	 Turning gear maintenance factor removed for F-class hours-
based rotor life
•	 Removed reference to turning gear effects on cyclic
customers’ rotor lives
•	 HGP factored starts example added
•	 F-class borescope inspection access locations added
•	 Various HGP parts replacement cycles updated and
additional 6B table added
•	 Revision History added
11/09 Rev L
•	 Updated text throughout
•	 Casing section added
•	 Exhaust Diffuser section added
•	 Added new Fig. 26: F-class axial diffuser
•	 Added new Fig. 27: E-class radial diffuser
•	 Revised Fig. 3, 5, 7, 8, 11, 19, 20, 23, 35, 37, 38, 40, 41, 42, 43,
44, E-1, and E-2
•	 Appendix D – updated repair and replacement cycles
•	 Added PG6111 (FA) Estimated repair and replacement cycles
•	 Added PG9371 (FB) Estimated repair and replacement cycles
10/10 Correc tion L .1
•	 Corrected Fig. D-4, D-5, and D-11 combustion hardware
repair and replacement cycles 2/15 Rev M
•	
Updated text throughout
•	 Added Fig. 14, 15, 25
•	 Revised Fig. 8, 10, 12, 22, 29, 34, 35, 37, 39, 41, 42, 43, 44,  45
•	 Updated Appendix A
•	 Updated Appendix D
•	 Added 7F.04 Estimated repair and replacement intervals
•	 Added Appendix G 
						

							49
GE Power & Water | GER-3620M (00015001200140018
)  
						

							50 
						

							4GTD-222, GTD-241, GTD-450, GECC-1, and Extendor are trademarks of the Ge\
neral Electric Company.
 
©201
5, General Electric Company. All rights reserved.
GER-3620M (0
2/15)