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Siemens modernizes medium-strip mill of Hoesch Hohenlimburg GmbH

(PresseBox) (Linz, Austria, ) Siemens VAI Metals Technologies has received an order from Hoesch Hohenlimburg GmbH to modernize the company's medium-strip rolling mill. The project involves renewing the basic and process automation systems of the medium-strip mill and the servo-hydraulic control equipment for the roughing stand. The order is worth several million euros. The project is part of a multiple-stage modernization program and is scheduled to be completed in spring 2012.

Hoesch Hohenlimburg GmbH, a company belonging to ThyssenKruppSteel AG, produces medium wide hot strip in a wide range of qualities at its facility in Hagen-Hohenlimburg. The hot band is made at widths between 165 mm and 685 mm, thicknesses from 1.5 mm to 16 mm and tensile strengths of between 170 and 1200 mega pascal, mainly for use as input stock for the cold rolling industry as well as in direct processing, for example in the automotive supply industry. Modernized by Siemens in the 1980s, the Level 1 and Level 2 systems that have been developed continually since then are to be replaced with an integrated, all-inclusive automation solution under a comprehensive modernization program.

To this end Siemens is to supply and install modern automation technology based on the Siroll HM platform, specially designed for hot rolling mills and already in use in the cooling section of the medium-strip mill at the Hoesch Hohenlimburg works. The scope of supply includes the entire basic and process automation as well as the process models and technological controllers.

In order to reduce production outages to a minimum, modernization will be carried out in stages in close coordination with the operating requirements of Hoesch Hohenlimburg. Refurbishment work will start in the automation of the roughing mill and its servo-hydraulic control equipment which will be put into operation in the winter of 2009. Conversion to the Siroll HM platform is scheduled for the end of 2009/beginning of 2010. The replacement of the finishing mill automation system will begin at the start of 2010 and is scheduled for completion in the spring of 2012. Initially, switchover devices will be installed during scheduled maintenance shutdowns, after which the new automation system will be optimized to incorporate a monitoring function. Changeover to the new automation equipment will then take place gradually. This procedure will considerably reduce downtimes and avoid any initial loss of quality after the changeover.

Siemens is also responsible for assembling and installing the supplied systems and the switchover equipment. Siemens won the contract thanks to its extensive experience in modernization projects and its integrated Siroll solution which includes the mechanical, electrical and automation systems.

Further information on solutions for steelworks, rolling mills and processing lines at:

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The Siemens Industry Sector (Erlangen, Germany) is the world's leading supplier of production, transportation, building and lighting technologies. With integrated automation technologies as well as comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six Divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 222,000 employees worldwide Siemens Industry posted in fiscal year 2008 a profit of EUR3.86 billion with revenues totaling EUR38 billion.

With the business activities of Siemens VAI Metal Technologies, (Linz, Austria), Siemens Water Technologies (Warrendale, Pa., U.S.A.), and Industrial Technologies, (Erlangen, Germany), the Siemens Industry Solutions Division (Erlangen, Germany) is one of the world's leading solution and service providers for industrial and infrastructure facilities. Using its own products, systems and process technologies, Industry Solutions develops and builds plants for end customers, commissions them and provides support during their entire life cycle. With around 31,000 employees worldwide Siemens Industry Solutions achieved an order intake of EUR 8.415 billon in fiscal year 2008. Further information and downloads at: