Ansaldo Thomassen Heavy-Duty Gas Turbine Services

With more than a century of experience working on all aspects of heavy-duty gas turbine technology, Ansaldo Thomassen (ATH) continues to meet the demand for clean, efficient and reliable power in an environmentally responsible manner.

Ansaldo Thomassen leverages its expertise as a leading specialist on General Electric (GE)-type heavy-duty gas turbines by providing flexible service solutions that optimise unit availability, minimise maintenance and component costs and increase operating safety.

Gas turbine remanufacturing and relocation

Ansaldo Thomassen can globally source GE-design heavy-duty gas turbines to remanufacture and upgrade them at our facility in the Netherlands. Remanufactured units are offered with short lead times and reduced investment levels. Within our gas turbine remanufacturing programme, we integrate custom solutions such as emission reductions, control system upgrades and extended lifetime programmes, for example on the gas turbine rotor.

Conversions, modifications and upgrades

Ansaldo Thomassen is a company with extensive experience in servicing and improving GE heavy-duty gas turbines due to its OEM heritage. With nearly 50 years of accumulated knowledge and expertise, we offer specialised engineering solutions. Our added value conversion, modification and upgrade solutions are based on increasing customers’ gas turbine power output, improving the heat-rate and reducing emissions.

Flexible service agreements for GE-type gasturbine technology

Ansaldo Thomassen offers clients a total maintenance concept. It is the product of decades of experience in all aspects of GE-type heavy-duty gas turbine technology. Our flexible service agreements are based on a total maintenance concept, offering customers enhanced unit availability and reliability along with reduced maintenance and operation costs. This concept includes the gas turbine itself, all auxiliaries and load gear, generator, boiler and steam turbine maintenance in full-service flexible service agreements (FSAs).

Spare parts for heavy-duty gas turbines

Ansaldo Thomassen designs, manufactures and delivers a complete range of capital parts for hot gas path, combustion and fuel nozzles, including consumables for GE frame 6, frame 9, frame 3 and frame 5, as well as frame 6FA and frame 9FA heavy-duty gas turbines.

We also supply pre-owned parts that are inspected and repaired to our high–performance standards. Gas turbine components are reconditioned at our well-established service centres in the Netherlands and in our workshop in the United Arab Emirates.

Field services for turbine maintenance

The Ansaldo Thomassen field service department consists of maintenance specialists who have extensive knowledge of GE heavy-duty gas turbines, both E and F-class. We have skilled field service engineers available worldwide to get to your site and help you with your scheduled and unscheduled maintenance.


Customers’ gas turbine components are in safe hands with us. Two fully equipped centres of excellence for repairs are available to recondition your E and F-class rotating equipment into perfect shape.

Our service centres are equipped with advanced tools and machinery. Experienced engineers and in-house capabilities enable us to perform repairs in a controlled manner.


We like to share our knowledge by offering numerous high-quality training courses at our training centre or at clients’ facilities. We are offering standard mechanical training courses, as well as control training. Training programmes can also be designed in line with special requirements.

We also organise ‘open’ courses for individual subscription in the Netherlands, as well as courses abroad in cooperation with local offices.

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Ansaldo Thomassen BV

6991 GS Rheden

PO Box 95

6990 AB Rheden



+31 26 497 5800 +31 26 497 5857 Youtube Company Video

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Ansaldo Thomassen BV

6991 GS Rheden

PO Box 95

6990 AB Rheden



+31 26 497 5800 +31 26 497 5857 Youtube Company Video
Ansaldo Thomassen Gulf


Abu Dhabi

United Arab Emirates

+971 2 6270954 +971 2 6119500 +971 2 6262066

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