TG316 - Steam Turbine Overhauls & Repairs

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4.5 days - 2.9 Continuing Education Units Awarded

Course Dates Download Brochure PDF
USD 2,495.00

We all want to improve the effectiveness of steam turbine maintenance activities.  This course is an important step toward accomplishing this goal.  Collectively, we want to:
  • REDUCE: Outage Durations, Outage Extensions, Work Duplication, and Rework
  • INCREASE: Outage Intervals, Reliability, Availability, and Productivity
Extensive "Training Aids" exercises are utilized during the entire 4 1/2-day session. This course is opresented at our facility in Bradenton, FL due to extensive uses of steam turbine components for practical exercises.
This course has been designed for steam turbine facility foremen, supervisors, mechanics, engineers, and all other plant personnel who are concerned with increasing the effectiveness and reducing the cost of steam turbine/generator maintenance outages. A thorough understanding of turbine fundamentals is a prerequisite for this course. This basic knowledge may be obtained by "On-Job" experience or by completion of a turbine fundamentals course.
Topical Outline includes: Diaphragm Area Checks, Diaphragm Drop Checks, Diaphragm Repairs, Steam Path Audit, Bucket/Blade Repair, Shell/Casing Repair, Bearing Repairs, Valve Component Repairs, and Packing/Seal/Fitting Repairs as-well-as stationary and rotating component repairs.
Upon successful completion of this course the participant should be able to:
  1. Describe the major activities associated with turbine maintenance.
  2. Identify and define the items of concern related to turbine maintenance activity.
  3. Identify the types of defects encountered during turbine maintenance inspections.
  4. Identify the relationship between operational effects and maintenance activity.
  5. Describe the various inspections performed during disassembly of the turbine.
  6. Describe the procedures for cleaning and inspecting the turbine components.
  7. Describe the impact of the various types of defects on turbine efficiency and reliability.
  8. Describe the criteria used to evaluate turbine component defects.
  9. Describe the various repair methods for defective component condition.
  10. Describe the details required for an effective steam path audit.
  11. Describe the methods used to properly align turbine components.
  12. Describe the criteria used to establish unit specific maintenance clearances.
  13. Describe the tasks involved in and the duration of diaphragm area checks.
  14. Describe the tasks involved in and the duration of diaphragm drop checks.
  15. Describe the tasks involved in and the duration of minor and major diaphragm repairs.
  16. Describe the tasks involved in and the duration of steam path audits.
  17. Describe the tasks involved in and the duration of bucket/blade repairs.
  18. Describe the tasks involved in and the duration of bearing repairs.
  19. Describe the tasks involved in and the duration of valve repairs.
  20. Describe the tasks involved in and the duration of packing fitting and repairs.
  1. Introduction

  2. Maintenance
    1. Definition of Maintenance
    2. Maintenance Concern
    3. Types of Defects
    4. Operational Effects

  3. Turbine Overhaul
    1. Disassembly
    2. Component Cleaning
    3. Inspection Techniques
    4. Component Inspections
    5. Steam Path Audits
    6. Reassembly

  4. Bearing/Coupling Maintenance

  5. Steam Valve Maintenance
    1. Safety Considerations
    2. GE Valve Disassembly
    3. W Valve Disassembly
    4. Cleaning/Inspection
    5. Practical Lab Exercises
    6. Valve Assembly

  6. Alignment
    1. Provisions
    2. Alignment Checks
    3. Internal Alignment Methods
    4. Special Cases

  7. Diaphragm Area Checks
    1. Taking Data
    2. Calculating Areas
    3. Evaluating Data
    4. Corrections

  8. Diaphragm Drop Checks
    1. Taking Data
    2. Evaluating Data
    3. Other Techniques

  9. Diaphragm Repairs
    1. Inspections
    2. Evaluations
      1. Minor
      2. Major
    3. Repairs
      1. Inco 182/82
      2. 410 Stainless

  10. Steam Path Audits
    1. Operating Data
    2. Defect Effecting Performance
    3. Taking Data
      1. Seal Leakage
      2. Other Leakage
      3. Erosion
      4. Surface Finish
      5. Deposits
      6. Mechanical Damage
      7. Economic Evaluation

  11. Bucket/Blade Repair
    1. Cover/Shroud Band Removal
    2. Tenon Recontour
    3. Tenon Peening
    4. Cover/ Shroud Band Fitting
    5. Cover/Shroud Band Foxhole
    6. Tenon Welding
    7. Bucket Weld Repairs
    8. Erosion Shielding Replacement
    9. Tie Wire Repair

  12. Casing/Shell Repairs
    1. Defects
    2. Evaluations
    3. Repairs

  13. Bearing Repairs
    1. Defects
    2. Evaluation
    3. Repairs

  14. Valve Component Repairs
    1. Casings
    2. Stems
    3. Disks
    4. Seats

  15. Packing/Seal Fitting/Repair
    1. Casing/Diaphragm Bore Distortion
    2. Offset Seals
    3. Long Neck Seals

  16. Course Conclusion / Examination


  1. 1 copy of HPC Technical Services' instructor notes.

There are two levels of certification.

  1. Mechanical Maintenance Technician – this course is required
  2. Field Engineer – this course may be used for substitution for another course offering.

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.)