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Leading technology

Proven utility steam turbines

Siemens offers a comprehensive range of steam turbine products in the power output range from 90 to 1,900 MW. These are used in conventional fossil-fired steam power plants as well as in nuclear and combined cycle power plants. With more than 8,000 steam turbines in service worldwide we provide proven technology, adapted to the specific local conditions.

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Our utility steam turbines in detail

SST-3000 utility steam turbine package

Flexible steam turbine for applications in single-shaft and multi-shaft combined cycle configurations

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The compact arrangement features a two-cylinder design with an axial exhaust for use in combined cycle power plants. 

 

The SST-3000 series covers the power output range from 90 to 250 MW. It features a separate high-pressure (HP) turbine and combined intermediate-pressure / low-pressure (IP / LP) turbine with single flow axial exhaust for 50 and 60 Hz applications.

Technical data

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  • Power output 90 up to 250 MW   
    Frequency 50 or 60 Hz


  • Inlet pressure up to 177 bar / up to 2,567 psi 
  • Inlet temperature up to 565 °C / up to 1,049 ° F


  • Reheat steam conditions: Temperature up to 565 °C / up to 1,049 ° F

 

  • Last stage blade length:  50 Hz – 80 cm to 115 cm / 31 inches to 45 inches
    60 Hz – 76 cm to 95 cm / 30 inches to 38 inches

 

 

SST-4000 utility steam turbine package

Powerful and reliable – thanks to proven design for high efficiency

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The SST-4000 series is our specialized turbine for dual-pressure, combined cycle applications. With the specialized design of the blade path, the entire power range from 100 to 380 MW can be covered with the highest reliability and availability.

 

Almost 40 turbines of this type are already in operation or in the commissioning stage, with a total installed capacity of approximately 7,200 MW.

The SST-4000 series consists of an intermediate-pressure and a low-pressure turbine. The installation is either high or low level arrangement with down, double-side or single-side exhaust. The turbine is able to provide process steam e. g. for industry or sea water desalination and can provide industrial heating.

 

Thanks to its systematically modular design, we can easily adapt the SST-4000 series to the individual operating conditions and thermal cycle of a plant. Another advantage is its fast installation, thanks to prefabricated, tested modules delivered ready for connection.

Technical data

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  • Power output 100 up to 380 MW  
    Frequency 50 or 60 Hz

 

  • Inlet pressure up to 105 bar / up to 1,523 psi
    Inlet temperature up to 565 °C / up to 1,049 ° F

 

  • Last stage blade length:  50 Hz – 80 cm to 115 cm / 31 inches to 45 inches
    60 Hz – 76 cm to 95 cm / 30 inches to 38 inches

 

 

SST-5000 utility steam turbine package

Flexible condensing or back-pressure steam turbine

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The SST-5000 is capable for supercritical and ultra-supercritical steam power plants. Due to its higher pressure and temperature ratings, power plant efficiency increases more than 46 percent and overall performance is improved.

In steam power plants the SST-5000 consists of a combined highpressure / intermediate-pressure turbine, and one or two low-pressure turbines. It is installed as a low- or high-level arrangement. There are various exhaust configurations available to create an optimized plant layout: down-, single-sided, and double-sided. Various extractions (up to 9 stages) create an optimized plant layout with down-, single-sided or doubles sided exhaust.

Technical data

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  • Power output: CCPP – 120 to 650 MW
    SPP – 200 to 500 MW (SPP)   
  • Efficiency: CCPP – 61.5% (CCPP)
    SPP – 43% for subcritical variant, 45% for supercritical variant
  • Frequency 50 or 60 Hz

 

  • Main steam conditions
    CCPP – Inlet pressure up to 177 bar / up to 2,567 psi  
    Inlet temperature up to 600 °C / up to 1,112 ° F
    SPP – Inlet pressure up to 260 bar / up to 3,770 psi  
    Inlet temperature up to 600 °C / up to 1,112 ° F

 

  • Reheat steam conditions
    CCPP – temperature up to 610 °C / up to 1,130 ° F
    SPP – temperature up to 600 °C / up to 1,112 ° F

 

  • Last stage blade length:  50 Hz – 66 cm to 142 cm / 26 inches to 56 inches
    60 Hz – 66 cm to 95 cm / 26 inches to 38 inches

 

 

SST-6000 utility steam turbine package

Reduced life-cycle costs

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Siemens Steam Turbines of the SST-6000 series are widely operated in coal-fired steam power plants with a power output up to 1,200 MW and an efficiency up to more than 46 percent.

 

Products of the SST-6000 series consist of a high-pressure turbine, an intermediate-pressure (IP) turbine, and up to three low-pressure turbines for 50 and 60 Hz.

 

The SST-6000 is installed as a high-level arrangement with down exhaust. Various extractions (up to 10 stages) are possible for feed water preheating, process steam, and district heating. The installed capacity of SST-6000 all over the world is more than 100,000 MW.

Technical data

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  • Power output 300 up to 1,200 MW
  • Efficiency 46,5 % (Double reheat: 48 %)   
  • Frequency 50 or 60 Hz

 

  • Inlet pressure up to 330 bar / up to 4786 psi
    Inlet temperature up to 610 °C / up to 1,130 ° F
  • Reheat conditions for single and double reheat: Temperature 630 °C / up to 1,166 ° F

 

  • Last stage blade length:  50 Hz – 66 cm to 142 cm / 26 inches to 56 inches
    60 Hz – 66 cm to 95 cm / 26 inches to 38 inches

 

 

 

SST-9000 utility steam turbine package

Leading technology for efficient, flexible and reliable power generation

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The SST5-9000 is a highly reliable steam turbine for applications in the conventional islands of advanced pressurized water reactors, with a power output up to 1,900 MW.

 

The half-speed SST5-9000 features a double-flow saturated steam high-pressure (HP) turbine and up to three double-flow low-pressure (LP) turbines with shrunk-on disk rotors.  Shrunk-on disk design features proven technology: no stress-corrosion cracking that will require replacement of the low-pressure rotors or disks during the design life-time.

Technical data

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  • Power output 1,000 up to 1,900 MW  
    Frequency 50 or 60 Hz

 

  • Inlet pressure up to 80 bar / up to 1,160 psi
    Inlet temperature up to 310 °C / up to 590 ° F

 

  • Last stage blade length:  50 Hz – 117 cm to 183 cm / 46 inches to 72 inches
    60 Hz – 107 cm to 142 cm / 42 inches to 56 inches

Technical data | all utility turbines

Everything at a glance

Download table as: PDF Excel
Power output
Frequency
Inlet steam pressure
Inlet steam temperature
Reheat steam temperature
Last stage blade length 50 / 60 Hz
SST-3000 90 – 250 MW 50 / 60 Hz up to 177 bar up to 565 °C up to 565 °C 80 – 115 cm / 76 – 95 cm
SST-4000 100 – 380 MW 50 / 60 Hz up to 105 bar up to 565 °C 80 – 115 cm / 76 – 95 cm
SST-5000 (CCPP)* 120 – 700 MW 50 / 60 Hz up to 177 bar up to 600 °C up to 610 °C 66 – 142 cm / 66 – 95 cm
SST-5000 (SPP)* 200 – 500 MW 50 / 60 Hz up to 260 bar up to 600 °C up to 600 °C 66 – 142 cm / 66 – 95 cm
SST-6000 300 – 1,200 MW 50 / 60 Hz up to 330 bar up to 610 °C up to 630 °C** 66 – 142 cm / 66 – 95 cm
SST-9000 1,000 – 1,900 MW 50 / 60 Hz up to 80 bar up to 310 °C 117 – 183 cm / 107 – 142 cm

*SST-5000 Efficiency:

  • CCPP: 61.5%
  • SPP: 43% for subcritical variant, 45% for supercritical variant

**Reheat conditions for single and double reheat

 

All data from 07/2017

Download table as: PDF Excel
Power output
Frequency
Inlet steam pressure
Inlet steam temperature
Reheat steam temperature
Last stage blade length 50 / 60 Hz
SST-3000 90 – 250 MW 50 / 60 Hz up to 2,567 psi up to 1,049 °F up to 1,049 °F 31 – 45 inches / 30 – 38 inches
SST-4000 100 – 380 MW 50 / 60 Hz up to 1,523 psi up to 1,049 °F 31 – 45 inches / 30 – 38 inches
SST-5000 (CCPP)* 120 – 700 MW 50 / 60 Hz up to 2,567 psi up to 1,112 °F up to 1,130 °F 26 – 56 inches / 26 – 38 inches
SST-5000 (SPP)* 200 – 500 MW 50 / 60 Hz up to 3,770 psi up to 1,112 °F up to 1,112 °F 26 – 56 inches / 26 – 38 inches
SST-6000 300 – 1,200 MW 50 / 60 Hz up to 4,786 psi up to 1,130 °F up to 1,166 °F** 26 – 56 inches / 26 – 38 inches
SST-9000 1,000 – 1,900 MW 50 / 60 Hz up to 1,160 psi up to 590 °F 46 – 72 inches / 42 – 56 inches

*SST-5000 Efficiency:

  • CCPP: 61.5%
  • SPP: 43% for subcritical variant, 45% for supercritical variant

**Reheat conditions for single and double reheat

 

All data from 07/2017

Downloads and support

Find out more about our products and services

In our download section, you can find brochures, technical papers, and more. Or you can contact us directly for specific inquiries.

References

More than 20,000 steam turbines were delivered to sites all over the world within the past 100 years.

Find below some chosen examples

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