Editor’s Note: Over the years, Siemens has acquired several well-known suppliers in the compressor segment, including Mannesmann Demag, Demag Delaval, Delaval-Stork, Delaval, Kühnle, Kopp & Kausch (KK&K), PGW Turbo, and most recently, Dresser-Rand. Today, the Duisburg, Germany site is a major operation within the Dresser-Rand business, part of Siemens Power and Gas Division.
Chimneys, industrial firms and the facilities of the world’s largest inland port paint the portrait of Duisburg, Germany – and have since the Industrial Revolution. With its proximity to coal beds and the Rhine and Ruhr rivers, Duisburg established itself as an important player in the metals and mining industries.
Duisburg suffered from the paradigm shift away from heavy industry to services during the steel crisis in the 1970s. However, it relied on its strengths. The Gerhard-Mercator-University Duisburg (today University Duisburg-Essen), built in 1972, elevated its technology-oriented reputation. Traditional steel production and metal processing continued to give way to high-tech production and abandoned sites became industrial monuments. In 2010, the Ruhr region became the “cultural capital of Europe.”
Today, with a population of around 500,000, Duisburg remains an important anchor for central Europe’s steel and coal industries. In fact, the remaining seven operating blast furnaces in the Ruhr region produce half of Germany’s pig iron. Siemens’ Duisburg manufacturing site has been building compressors for the processing industry and the oil and gas sector for almost 90 years. The roots of this plant go back to the mechanical engineering company, Bechem und Keetman, founded in 1862. Wolfgang Reuter established Deutsche Maschinenfabrik AG in 1910, which grew into Duisburg’s largest mechanical engineering firm in the 1920s under the name “Demag.” Demag produced its first turbocompressor in 1929. The company’s success continued beyond the Second World War with products like the world’s first four-stage, integrally-geared compressor. Business reached a high point during its period of cooperation with Mannesmann AG in the 1970s.
Siemens AG bought Demag Delaval Turbomachinery Group from Atecs Mannesman AG in 2001. With the acquisition, ownership of all Demag manufacturing facilities transferred to Siemens, including those in Duisburg, Germany and Hengelo, The Netherlands.
Manufactured in Duisburg today
In June 2015, Siemens’ Duisburg facility, home to approximately 2,500 employees (including more than 600 production workers and around 200 apprentices) became part of the Dresser-Rand business with Siemens’ acquisition of Dresser-Rand.
The principal activities at the Duisburg plant include manufacturing and servicing turbocompressors – integrally geared compressors and different types of single-shaft compressors – for the process, chemical and oil and gas industries. The manufacturing space, where approximately 200 compressors are produced each year, spans 678,126 ft2 (63,000 m²) in a functional arrangement across the campus. Other activities include sales, development and engineering, product management, testing and after-sales service and support.
The integrally geared STC-GV compressor series offers high efficiencies and pressures up to 2,901 psi (200 bar). Designed to customer and API 617 and API 672 specifications, these compressors guarantee high quality and highly technical standards for a broad range of industrial applications in air separation, metallurgy and petrochemicals.
The Duisburg portfolio also includes the STC-GC and STC-SI series of standardized compressors. The STC-GC is the standardized version of the STC-GV series available as a high-pressure version of the STC-GC (H). It’s ideal for use in air separation plants to compress process air or nitrogen. The STC-SI compressor is the best solution for high capacity (2,000 up to 3,500 tons of oxygen per day) air separation due to its high volume flows (400,000 – 700,000 m³ of air/hour).
The single-shaft centrifugal compressors (including STC-SH and STC-SV series) are appropriate for medium-pressure process requirements for a wide range of volume flows. The horizontally-split STC-SH series, used for cracked gas, coker gas, process air, or carbon dioxide, has discharge pressures to approximately 725 psi (50 bar) for hydrocarbons and 1,450 psi (100) bar for inert gases and oxygen. The vertically-split STC-SV series, with up to 14,504 psi (1,000 bar) discharge pressure, is ideal for high-pressure applications such as hydrocracking, syngas or gas storage and injection.
Six pipeline compressor models are manufactured in Duisburg and offer a choice of axial or conventional opposed inlets, with flange sizes ranging from 508mm (20 inches) to 1,067mm (42 inches) – ideal for natural gas transmission applications.
Compressor solutions from Duisburg are in use throughout the world extracting, transporting and processing oil and gas in chemical and petrochemical industries, refineries, air separation plants, and in blast furnaces. ▪