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Rotor Repair

Engines Serviced

With our complete services offering, we at APG take pride in being the industry's top industrial gas turbine maintenance provider. These services help us enhance our clients' power-generating assets' availability, dependability, and efficiency. By revitalizing, optimizing, and engineering your turbine components to fulfill electrical power consumption requirements, our Rotor Repair services are at the forefront of the industry. We offer unsurpassed competence in rotor repair, exceeding expectations with our solutions. We have a cutting-edge facility in Houston, Texas, and a staff of highly skilled repair professionals.



Frame 3 Frame 7
Frame 5 Frame 9
Frame 6 B, E, EA


W101 251
W171/191 501D5


All Manufacturers

Engineering Solutions

As rotor assets have aged over time, APG’s engineering team continues to work hand-in-hand with our repair technicians throughout the entire repair process. Our Rotor Lifetime Extension program is performed to provide an engineering assessment as to the integrity of the components for continued service:

  • Visual Testing
  • Phase Array volumetric ultrasonic testing (PAUT)
  • Eddy current testing (ET)
  • Magnetic Part Testing (WMPT)
  • Metallurgical examinations
  • Hardness Testing
  • Positive material identification
  • Optional – critical flaw modeling
Pf S2 Jason Lab 2

Shop Capabilities

At APG, we recognize the importance of maintaining your steam and gas turbines in top working order. Our company offers a wide range of services to meet different rotor maintenance needs, including:


Unstack &


Deblade and reblade


Tip grinding of new
compressor blades


Rabbet fit repairs


Individual component
vertical balancing


Computerized stacking
for balance optimization


Low speed horizontal


Non-Destructive Examination
includes MT, UT, ET, PT


Bearing journal machining
and final grinding


Spacer migration


Bucket anti-rock coatings


High temperature oxidation
and corrosion coatings


New Rotor through bolts


New Compressor blades

1. Unstack & Restack:

Our skilled technicians can deconstruct and rebuild rotor parts, enabling thorough inspections and accurate repairs.

2. Deblade and Reblade:

We restore the effectiveness and performance of the compressor blades of your turbine by thorough deb loading and reading procedures, assuring uninterrupted operations.

3. Tip Grinding of New Compressor Blades:

We utilize advanced techniques to perform precise tip grinding of new compressor blades, enhancing aerodynamic efficiency.

4. Rabbet Fit Repairs:

Our crew is skilled in Rabbet fit repairs, guaranteeing a flawless fit between rotor components for smooth performance.

5. Individual Component Vertical Balancing:

Each component must be balanced to the highest standards for a turbine's operation. Our computerized vertical balancing achieves this.

6. Stacking for Balance Optimization:

With our cutting-edge technology, the stacking procedure is optimized, enhancing your rotor's overall balance and functionality.

7. Non-Destructive Examination (NDE):

To find defects and maintain structural integrity, we use a variety of NDE techniques, such as Magnetic Testing (MT), Ultrasonic Testing (UT), Eddy Current Testing (ET), and Penetrant Testing (PT).

8. Bearing Journal Machining and Final Grinding:

By restoring bearing journals to their original specifications by precision machining and grinding, we can avoid any possible problems.

9. Spacer Migration:

We address the issue of spacer migration to guarantee the correct alignment and effective operation of rotor components.

10. Bucket Anti-Rock Coatings:

To stop bucket movement and increase the lifespan of your turbine, we apply specialist anti-rock coatings.

11. High-Temperature Oxidation and Corrosion Coatings:

These coatings shield rotor parts from corrosion and oxidation, extending their lifespan.

12. New Rotor Through Bolts and Compressor Blades:

APG supplies high-quality replacement through bolts and compressor blades to guarantee dependable turbine operation.

Rotor Repair

Optimize Performance and Life Cycle Costs at the Same Time.

Contact Component Solution Specialist