Industrial steam turbines

The SST-800 is a single casing steam turbine with center steam admission and reverse steam flow inner casing, designed for a direct coupled generator or mechanical drive.

The highly customized turbine provides for an outstanding efficiency, fast start-up times and high reliability and availability. It supports all requirements for economical installation and operation in combination with highest flexibility for complex industrial processes. A double or even multicasing solution can also be provided.

The SST-800 steam turbine can be used for both condensing and back-pressure applications. Turbine auxiliary systems are also designed as pre-engineered modules covering the complete range of turbine sizes.

The turbine can be arranged on a foundation or as a package (includung oil system and on a base frame). The SST-800 steam turbine design is in accordance with DIN or API standards.

Technical Data:

Power output: ≤ 250 MW
Speed: 3,000 / 3,600 - up to 7,100 rpm
Live steam parameters:
- Inlet pressure: 165 bar(a) /2,393 psi
- Inlet temperature: 565 °C / 1,050 °F
Exhaust steam parameters:
- Exhaust pressure for backpressure: 72 bar(a) / 1,044 psi
- Exhaust pressure for condensing: up to 1.2 bar(a) / 16 psi
- Exhaust pressure for district heating: up to 3 bar(a) / 43 psi
Steam extraction parameters:
- Reheat temperature: 565 °C / 1,050 °F
- Controlled extraction pressure: 72 bar(a) / 1,044 psi
- Controlled extraction temperature: 480 °C / 895 °F
- Number of extraction valves for controlled extraction: up to 2
- Uncontrolled extraction pressure: 140.0 bar(a) / 2030.5 psi
- Number of extraction valves for uncontrolled extraction: up to 7

Typical Applications:

Combined cycle power plants (CCPP)
Combined heat and power plants (CHP)
Concentrated solar power plants (CSP)
Biomass plants and waste-to-energy plants (WtE)
Industrial power plants, e.g. captive power plants in chemical and petrochemical industries, manufacturing industries, paper mills, mines, metal, and cement plants, waste heat recovery
Oil & gas industries
District heating plants

The SST-700 / 900 is a standard turbine solution with short delivery time due to its fixed pre-engineered design. Predefined modules enable a short manufacturing period, cost-efficient material supply and a fast ex-works delivery.

The straight flow turbine solution with power output of up to 250 MW consists of a geared high-pressure steam turbine (backpressure), an intermediate / low-pressure steam turbine (condensing), both driving a generator installed in between.

The dual casing reheat turbine configuration with inner casing is a competitive and optimized product for combined cycle power plants and concentrated solar power plants.

Technical Data:

Power output: ≤ 250 MW
Speed: 3,000 / 3,600 rpm
Live steam parameters:
- Inlet pressure: 180 bar(a) / 2,611 psi
- Inlet temperature: 565 °C / 1,050 °F
Exhaust steam parameters:
- Exhaust pressure for condensing: 0.7 bar(a) / 10.1 psi
Steam extraction parameters:
- Reheat temperature: 565°C / 1,050°F
- Controlled extraction pressure: 72 bar(a) / 1,044 psi
- Controlled extraction temperature: 480 °C / 895 °F
- Number of extraction valves for controlled extraction: up to 3
- Uncontrolled extraction pressure: 85 bar(a) / 1,233 psi
- Number of extraction valves for uncontrolled extraction: up to 7

We deliver a standard steam turbine generator set including the SST-600 (with or without gearbox), a generator, oil system, piping and instrumentation and the control system. The standard package can be extended to include a condenser, condensing plant or pre-heating system. The SST-600 with its reliable and flexible design is available with axial or radial exhaust.

Mechanical Drive

The SST-600 is also an efficient and economic mechanical drive. Since the 1970s, hundreds of projects have been successfully implemented all over the world using the SST-600 to directly drive everything from the smallest boiler feedwater pump just as reliably as the largest compressor even in the most complex processes. The SST-600 complies with regulations including the API standard.

Technical Data:

Power output: ≤ 200 MW
Speed: 3,000 / 3,600 - up to 18,000 rpm
Live steam parameters:
- Inlet pressure: 165 bar(a) / 2,393 psi
- Inlet temperature: 565 °C / 1,050 °F
Exhaust steam parameters:
- Exhaust pressure for backpressure: 72 bar(a) / 1,044 psi
- Exhaust pressure for condensing: up to 1.2 bar(a) / 16 psi
- Exhaust pressure for district heating: up to 3 bar(a) / 43 psi
Steam extraction parameters:
- Controlled extraction pressure: 72 bar(a) / 1,044 psi
- Controlled extraction temperature: 480 °C / 895 °F
- Number of extraction valves for controlled extraction: up to 2
- Uncontrolled extraction pressure: 85 bar(a) / 1,233 psi
- Number of extraction valves for controlled extraction: up to 6

The SST-500 is a single casing, double exhaust flow steam turbine, which can be used as an entire drive or as the lowpressure module of a multiple-casing turboset, directly driven or geared. This turbine, with its capacity to operate over a wide range of speed and power, is ideal for large steam volume flows. Steam flows into the turbine via two tangential inlets to equalize thermal loading and blade stress.

Emergency stop valves and control valves are installed in the steam inlet pipes. The steam flows tangentially into the inner casing and then axially to both exhausts. The customized design of the steam path allows exact adjustment to surpass general physical limitations of the last stage blades. Double-end drive is available, if required, e.g. for booster pump drive

Technical Data:

Power output: ≤ 150 MW
Speed: 3,000 / 3,600 - up to 15,000 rpm
Live steam parameters:
- Inlet pressure: 30 bar(a) / 435 psi
- Inlet temperature: 400 °C / 750 °F
Exhaust steam parameters:
- Exhaust pressure for backpressure: up to 3.0 bar(a) / 43.5 psi
- Exhaust pressure for condensing: 0.7 bar(a) / 10.1 psi
- Exhaust pressure for district heating: up to 3 bar(a) / 43 psi
Steam extraction parameters:
- Uncontrolled extraction pressure: 8 bar(a) / 116 psi
- Number of extraction valves for uncontrolled extraction: up to 4

The SST-400 is a single casing steam turbine, providing geared or direct drive to 50 and 60 Hz generators, or to compressors and pumps. The symmetrical casing with horizontal joint flange enables the SST-400 to accept short start-up times and rapid load changes.

The modular package design allows a wide variety of configurations to satisfy the customer’s individual needs in the most economical way. The utilization of selected proven components assures high reliability and easy maintenance.

The SST-400 can be equipped with upward, downward or axial exhaust to fit with the selected installation. The turbine skid can be combined with a standardized gearbox, oil units, and generators to a turboset, according to the customer’s needs. The turbine skid and gearbox/oil unit are fully assembled in the workshop before being shipped to the site. Our proven installation and maintenance concept lowers maintenance costs by enabling easy access to the installed components, the turbine, gearbox, and generator.

Technical Data:

Power output: ≤ 65 MW
Speed: up to 7,100 rpm
Live steam parameters:
- Inlet pressure: 140 bar(a) / 2,030 psi
- Inlet temperature: 540 °C / 1,004 °F
Exhaust steam parameters:
- Exhaust pressure for backpressure: 25 bar(a) / 365 psi
- Exhaust pressure for condensing: 0.5 bar(a) / 7.1 psi
Steam extraction parameters:
- Controlled extraction pressure: 40 bar(a) / 580 psi
- Controlled extraction temperature: 450 °C / 842 °F
- Number of extraction valves for controlled extraction: up to 2
- Uncontrolled extraction pressure: 60 bar(a) / 870 psi
- Number of extraction valves for uncontrolled extraction: up to 5

The SST-300 is an optimal solution for a wide range of applications due to the implementation of the best technology combined with over 20 years of experience. In the last decade alone, this turbine has been installed in over 500 industrial and power applications by customers all over the world.

All components and auxiliaries including the lube oil system are mounted on a common base frame. The turbine can be configured with either an upward, downward or axial exhaust orientation depending on the layout of the plant.

The turbine can also accommodate multiple steam extraction / steam induction points as well. The compact design and simple layout of the turbine significantly reduce the cost and time associated with its construction, inspection and maintenance.

Technical Data:

Power output: ≤ 60 MW
Speed: up to 12,000 rpm
Live steam parameters:
- Inlet pressure: 140 bar(a) / 2,030 psi
- Inlet temperature: 540 °C / 1,004 °F
Exhaust steam parameters:
- Exhaust pressure for backpressure: 20 bar(a) / 290 psi
- Exhaust pressure for condensing: 0.7 bar(a) / 10.2 psi
Steam extraction parameters:
- Controlled extraction pressure: 30 bar(a) / 435 psi
- Controlled extraction temperature: 400 °C / 752 °F
- Number of extraction valves for controlled extraction: up to 2
- Uncontrolled extraction pressure: 60 bar(a) / 870 psi
- Number of extraction valves for uncontrolled extraction: up to 5

The SST-200 is a single casing steam turbine provided in a packaged, skid-mounted configuration. It represents a solution based on long experience with both mechanical and generator drives and is characterized by ease of installation, facilitated by the modular package. The tailor-made, flexible steam turbine exactly fits to the customer needs.

The Siemens SST-200 industrial steam turbine product line is based on the reaction blade technology. The turbine series follows a modular product philosophy, ensuring a high level of performance and reliability. The ability to combine standardized casing modules enable optimal design flexibility. This allows the turbine series to achieve high performance in combination with an optimal cost position.

A high degree of standardization and lean specifications reduce the time to take the steam turbine in operation and provide easy maintenance. The combination of these factors lead Siemens to deliver a highly reliable products, with the short delivery times that suit this market segment.
Implementation of the latest blading technology has led to efficiency improvements of up to 2% compared to previous turbine design.
Optimal total cost ownership due to standardized components, highest efficiency, and optimized maintenance concept.

Technical Data:

Power output: ≤ 25 MW
Speed: up to 13,500 rpm
Live steam parameters:
- Inlet pressure: 120 bar(a) / 1,740 psi
- Inlet temperature: 540 °C / 1,004 °F
Exhaust steam parameters:
- Exhaust pressure for backpressure: 20 bar(a) / 290 psi
- Exhaust pressure for condensing: 0.7 bar(a) / 10.2 psi
Steam extraction parameters:
- Controlled extraction pressure: 16 bar(a) / 232 psi
- Controlled extraction temperature: 350 ° C / 662° F
- Number of extraction valves for controlled extraction: up to 1
- Uncontrolled extraction pressure: 60 bar(a) / 870 psi
- Number of extraction valves for uncontrolled extraction: up to 4

One of our key service goals is to minimize system downtime and resulting productivity losses

Our stand-by heating system maintains the turbine at a high temperature during standstills and thereby greatly reduces the start-up time. Keeping the steam turbine generator units warm increases the remaining service time for the most important components, such as the turbine casing and the rotor.

	SST-700 / 900	SST-800	SST-600	SST-500	SST-400	SST-300	SST-200
Output SPP MW	≤ 250	≤ 250	≤ 200	≤ 150	≤ 65	≤ 60	≤ 25
Rotational Speed rpm	3,000 / 3,600	3,000 / 3,600 - up to 7,100	3,000 / 3,600 - up to 18,000	3,000 / 3,600 – up to 15,000	up to 7,100	up to 12,000	up to 13,500
Inlet pressure bar / psi	180 / 2,611	165 / 2,393	165 / 2,393	30 / 435	140 / 2,030	140 / 2,030	120 / 1,740
Inlet temperature °C / °F	565 / 1,050	565 / 1,050	565 / 1,050	400 / 750	540 / 1,004	540 / 1,004	540 / 1,004
Exhaust Pressure (back) bar / psi		72 / 1,044	72 / 1,044	up to 3.0 / 43.5	25 / 365	20 / 290	20 / 290
Exhaust Pressure (cond.) bar / psi	0.7 / 10.1	up to 1.2 / 16	up to 1.2 / 16	0.7 / 10.1	0.5 / 7.1	0.7 / 10.2	0.7 / 10.2
Exhaust Pressure (distr.) bar / psi		up to 3 / 43	up to 3 / 43	up to 3 / 43
Reheat temperature °C / °F	565 / 1,050	565 / 1,050
Controlled extraction pressure bar / psi	72 / 1,044	72 / 1,044	72 / 1,044		40 / 580	30 / 435	16 / 232
Controlled extraction temperature °C / °F	480 / 895	480 / 895	480 / 895		450 / 842	400 / 752	350 / 662
Number of extraction valves for controlled extraction	up to 3	up to 2	up to 2		up to 2	up to 2	up to 1
Uncontrolled extraction pressure bar / psi	85 / 1,233	140.0 / 2030.5	85 / 1,233	8 / 116	60 / 870	60 / 870	60 / 870
Number of extraction valves for uncontrolled extraction	up to 7	up to 7	up to 6	up to 4	up to 5	up to 5	up to 4