Oil & Gas Technology: Siemens develops world’s largest turbo compressor for sulphuric acid industry

Abu Dhabi, May 7, 2013

Siemens is expanding its compressor portfolio with a turbo compressor which has been especially developed for the sulphuric acid industry. With a rotor diameter of 2,240 millimetres (mm) and a capacity range of between 8 and 14 megawatts, the new single-stage STC-SOF (22) turbo compressor is the largest and highest capacity machine of its class.

This compressor can replace two machines operated in parallel in plants with a production capacity of up to 6,000 tons of sulphuric acid per day. Operating in combination with optimized control and drive systems, the new unit can reduce overall costs by up to 20 percent compared with a solution with two model STC-SOF compressors with a rotor diameter of 1,400 mm.

The STC-SOF (22) turbo compressor is characterized by low procurement and operating costs. It synthesizes proven technology from the existing Siemens compressor family, custom-combining individual standardized modules for the specific application. Efficiencies of 87 percent are thereby achieved at the compressor coupling – ranking high among comparable compressors in the industry.

"The new STC-SOF (22) is based on a well-established compressor design concept and therefore extremely reliable. It combines robustness and adaptability with the most advanced aerodynamic and mechanical design. This unit will help us successfully strengthen our position as the global technology leader for predesigned turbo compressors," says Lennart Nilsson, Head of the Compression Business Unit at Siemens’ Energy Sector.

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Siemens AG

Wittelsbacherplatz 2, 80333 Munich, Germany

Corporate Communications and Government Affairs

Head: Stephan Heimbach

Energy Sector Oil & Gas Division

Sheikh Zayed 2nd Street, Abu Dhabi

Reference number: EOG201305.033e fp

Siemens AG Press Release

Reference number: EOG201305.033e fp Page 2/2

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Contact for journalists:

Siemens AG, Media Relations

Kerstin Eckert, phone: +49 9131 18-83481

E-mail: kerstin.eckert@siemens.com

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This press release can be found at:

www.siemens.com/press/pi/EOG201305033e

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For further information on the STC-SOF turbo compressor, please see http://www.energy.siemens.com/fi/en/compression-expansion/turbocompressors/single-stage-compressors/stc-sof.htm as well as http://www.energy.siemens.com/fi/pool/hq/compression/single-stage-compressors/downloads/Pre-Designed_Turbocompressors_Blowers.pdf

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Siemens’ Energy Sector is the world’s leading supplier of a broad spectrum of products, services and solutions for power generation in thermal power plants and using renewables, power transmission in grids and for the extraction, processing and transport of oil and gas. In fiscal year 2012 (ended September 30), the Energy Sector had revenues of EUR 27.5 billion and received new orders totalling approximately EUR 26.9 billion and posted a profit of EUR 2.2 billion. On September 30, 2012, the Energy Sector had a work force of almost 86,000.

Further information is available at: www.siemens.com/energy.