Gas turbine rotor OEM expertise and experience

For the 7F gas turbine there have been over 30 turbine rotor modifications, more than 10 compressor rotor enhancements, and more than 100 different blade changes since 1990. When it comes to addressing gas turbine rotor needs there are many different solutions, but GE has the knowledge, history, and expertise to perform a full rotor life assessment, addressing all phases of the lifecycle—for today and tomorrow.

Proven gas turbine rotor life management

Through years of fleet and engineering analysis, we have developed proprietary gas turbine rotor manufacturing processes that cannot be duplicated. As rotor assets have aged over the last few years, our customers have worked with us to replace more than 250 B and E turbine rotors and over 500 F turbine rotors. For the 7F gas turbine there have been more than 30 turbine rotor modifications, 10+ compressor rotor enhancements, and more than 100 different blade changes since 1990. 

On-demand webinar

Let's Talk: 7F rotor life management

How does your plant's rotor fit in with your long-term strategy? Has changing operating modes and the evolving energy landscape made you look at your rotor needs different? View our webinar on demand to learn about your options for managing the life of your 7F rotor.


Gas turbine rotor life management and extension solutions

Interested in finding out which rotor life solution is right for you? Start by choosing your rotor type to see and compare the available solutions.

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Frequently asked questions

Learn more about rotor life management

Rotor life extension

How to choose between start- or hours-based extension?

Rotor life extension

Tom Freeman, Chief Consultant for GE Gas Power, takes a look at one option power plants have to address rotor life: rotor life extension.

Rotor life management

What goes into rotor life management?

Rotor life management

Matthew Ferslew, Services GT Rotor Principal Engineer for GE Gas Power, reviews GE’s rotor life strategy, which revolves around three pillars: analytical assessments, operational experiences, and variation sources.

Rotor corrosion

What is rotor corrosion and how does it impact my rotor?

Rotor corrosion

Matthew Ferslew, Services GT Rotor Principal Engineer for GE Gas Power, explains corrosion, which is a major source of variation in generator rotors. Learn about the environmental factors that can lead to corrosion, and what you can do to address the issue.

Turbine rotor configuration and using nickel-based alloy wheels

Why is it important to use wheels that have been properly forged, machined and processed?

Using wheels that have not been manufactured and properly processed can result in forced downtime, longer outages, and performance and emissions issues. The process to create rotor wheels is extremely complex and has been developed by GE and our suppliers over 50 years. GE has millions of operating hours on its nickel-based alloy wheels, and based on lessons learned and proprietary analysis, we have made more than 30 design modifications to the 7FA gas turbine rotor. This vast experience, coupled with design analytics and inspection data, have given us a full understanding of the capability of these wheels.

Compressor rotor and understanding configurations, clearances, and performance

Why is configuration management important when installing GE’s compressor packages on my 7F gas turbine?

GE has developed our compressor packages with full instrumented testing, coupled with design analytics and fleet operating experience. In addition, we have made 10 compressor rotor design changes and hundreds of blade design changes on the 7FA gas turbine over the past 30 years, so we have a comprehensive understanding of the configuration. When configuration is not fully analyzed by GE engineering, errors can be made that result in outage delays of several months and performance losses of more than 5 MW.

Specialized inspection processes and tooling

Why is it important to use a qualified inspection process during rotor life management?

GE’s inspection criteria is defined based on years of analytical modeling and inspection data in shops or in the field. Addressing inspection findings requires engineering knowledge of the rotor system, and inspecting equipment also requires calibration and maintenance. GE has completed thousands of 7FA gas turbine inspections both in the shop and in the field.

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Want to learn more about gas turbine rotor life management and extension?