CT204 – Principles of Combined Cycle Turbine Maintenance

CT204 – Principles of Combined Cycle Turbine Maintenance

4.5 days - 32 PDH Credits Awarded


No future dates scheduled


In today’s environment it is important to be properly prepared for turbine outages.  Even if you are not expected to be the “technical advisor”, it is still important for you to appreciate all the activities that are important to the outage plan and implementation of that plan.  This course is intended to improve the effectiveness of your combined cycle turbine maintenance activities.  Reduced number of forced outages and increased unit reliability and availability can be the result. We start by reviewing the basics.  One cannot implement an effective outage plan if one does not understand the fundamentals of how a combustion and steam turbine functions.  Learn how operating duty affects turbine components AND how the integrity of turbine components affects operations.  Learn important issues associated with disassembly / reassembly, in-situ inspections, and the differing type of inspections found on a gas turbine.  Equipment needs to be taken apart safely and properly.  Learn what components should be cleaned and how.  Learn the basics of a good visual inspection, use of in-situ inspection vehicles, and what mechanical / electrical tests might be performed. Topics include: Gas & Steam Turbine Construction • Outage Planning • Combustion / Hot Gas Path / Major Gas Turbine Outages • Major Disassembly Considerations • Inspection • Routine Repairs This course has been designed for plant personnel who are involved in safely and effectively operating and maintaining combined cycle plants.


The overall objective is to increase participants’ capability to plan and implement future combined cycle turbine maintenance outages.  Upon completion of this course the participant will be able to:
  1. State the purpose of a combustion turbine and describe the major components that make up the combustion turbine.
  2. State the purpose of the steam turbine and describe the major components making up the steam turbine.
  3. Identify and state the purpose of those auxiliary systems associated with combined cycle turbines.
  4. Describe the sequencing that occurs in a normal startup, synchronization and operation.
  5. Describe the different fuel systems and requirements for operation.
  6. Demonstrate having the knowledge necessary to use effective and safe maintenance procedures.
  7. Demonstrate the ability to properly plan a maintenance outage prior to shutdown.
  8. Demonstrate the knowledge necessary to measure and interpret information as it relates to the unit outage.
  9. Demonstrate the knowledge necessary to disassemble/reassemble equipment in an orderly and safe manner.
  10. Demonstrate the knowledge necessary to properly clean and inspect combustion turbine components.
  11. Demonstrate the knowledge necessary to conduct non-destructive testing and automated inspections.

Course Dates / Location / Fee

See www.TurbineGeneratorTraining.com for detail on the course dates / locations / and registration fees. HPC’s 3-4-2 policy applies:  Sign up 3 for the same course/date, pay in advance, and pay for only 2 (the 3rd participant is free)! HPC Technical Services reserves the right to cancel any course/seminar within 10-working days of the scheduled date.  Fees are 100% refunded or credited to another Seminar (clients' choice) if HPC should cancel any Seminar.  HPC is not responsible for non-refundable airline tickets or other travel expenses under any circumstance.

Course Outline

  1. Review of Combined Cycle Components:  Gas & Steam Paths
  2. Combustion (Gas) Turbine Fundamentals: Basic Cycle: Gas Turbine Relationships, Power Relationships between Compressor, Combustor and Turbine, Overview of Differences in Gas Turbine Designs, IGV and Casing, Compressor Section, Combustion Section, Turbine Section, Exhaust, Bearings, Compressor/Turbine Rotors, Cooling & Sealing, Fuel
  3. CC Steam Turbine Fundamentals: Basic Steam Cycle, HP Shell, LP Casings, Impulse/Reaction Designs, Stationary Nozzles, Turbine Blades, Shaft Seals, Bearings, Couplings
  4. Maintenance Preparation & Planning: Periodic Inspections, Records, Running Inspections, Combustion Section Inspection, Hot Gas Path Inspection, Major Inspection, Steam Path Inspections, Documentation, Component and Parts Requirements, Safety, Tools & Measuring Equipment, Scheduling
  5. Combustion Section Inspection: Accessibility, Parts Identification, Fuel System, Ignition and Flame Detection, Combustion Components, Borescope Inspection, Inspection Data, Reassembly
  6. Hot Gas Path Inspection: Accessibility, Turbine Shell Disassembly, Nozzle Disassembly, Inspection, Reassembly
  7. Major Inspection: Accessibility, Disassembly, Bearings, Rotor, Compressor Stator, Reassembly
  8. Steam Turbine Inspection:Disassembly, HP Turbine Shell and Rotor, LP Turbine Casing & Rotor, Journal & Thrust Bearings, Inner Stage Seals, Steam Seals.
  9. Alignment: Readings, Procedure
  10. Startup & Test: Pre-Startup Checks, Startup Checks, Evaluation

Frequently Asked Questions

  • Will HPC Technical Services bring this course to our location for our personnel only? YES, call or email Stephen Parker,Stephen@TurbineGeneratorTraining.com for a price quotation.
  • Will HPC Technical Services customize the presentation at our site to suit our particular needs?
  • Is HPC Technical Services' textbook available for purchase as a reference document? Available Soon.
  • What is the cost for HPC Technical Service to deliver this course at our location? Well, of course that can vary, but generally speaking, if you're planning on having 6+ attend, when considering your T&L, it is to your advantage to perform the course at your plant (office).  You gain from the customization and price.
  • Can HPC Technical Services provide "Technical Assistance" in conducting functional checkouts or troubleshooting problems? Yes we can.  Call or contact Stephen Parker,Stephen@TurbineGeneratorTraining.com for our rate sheets and any further information required.

What You Will receive

  1. 1 copy of HPC Technical Services' textbook, CT204 Principles of Combined Cycle Turbine Maintenance. It is a valuable desktop reference in addition to being able to enhance the learning process.
  2. A Certificate of Completion

Gas Turbine Certification

There are two levels of certification (Both levels require this course):
  1. Field Engineer
  2. Maintenance Technician
Those who attend this course are automatically qualified to take HPC Technical Services' Certification Examination.  This examination is offered at no additional expense to the participant.  An 80% passing grade is required.  The examination length will not exceed 2-hours.  Those who complete this examination will receive a revised "certificate of completion" that recognizes this accomplishment along with two-copies of a "To Whom It May Concern" letter that states their accomplishment.  (Two copies are provided, one for the participants' employer and one for the participants' personal file.)  Consult HPC's website, www.TurbineGeneratorTraining.com, for detail on this certification program.