Demag Cranes supplies three process cranes to Interfer Rohrunion
- Total crane solution tailored precisely to the requirements of the steel trade
- Industry solution impresses with availability, performance and safety
Demag Cranes supplied three process cranes for the new external store of Interfer Rohrunion at the Voerde site, Germany. The three identical cranes of the Steelmaster type, each with a lifting capacity of 12 tonnes, place steel tubes and profiles into storage and transfer them for further processing to an adjacent hall complex.
In the new external store created over an area of 12,500 square metres, three highly versatile single-girder overhead travelling cranes equipped with magnet spreaders travel on a 450-metre-long crane runway. The cranes ensure that both the newly equipped high-performance sawing centre and processing area, and the zones for coating and order picking are supplied on schedule with the required steel tubes. The industry-specific requirements with regard to the availability and cargo handling performance of the crane installation, in addition to its safety design features, were correspondingly high.
Crane solution pursues corporate strategy
“Each year approx. 100,000 tonnes of steel tubes are ordered, sawn, processed or coated and delivered to our international customers as requested”, explains Werner Peters, operational manager at Interfer Rohrunion. “In order to actually be able to implement our requirements for maximum service and delivery performance, it was important for us to work with a partner such as Demag Cranes, who is precisely aware of the specific requirements of our industry and whose product and service quality can be relied upon in equal measure.”
Lutz Dowy, Head of Process Cranes adds: “Within the Demag product portfolio, Steelmaster is considered the logical response to the special process requirements of the steel trade. In practice, this process crane impresses by virtue of flexible applications, safe operation, fast handling and minimum wear of the installation. From the commercial viewpoint, the high availability and low costs also speak for the Steelmaster.
Flexible application for complex tasks
The three Demag single-girder travelling cranes used on a common crane runway have a span of 27.5 metres. They are each equipped with two synchronised hoists with a lifting capacity of 6.5 tonnes and can be used for variable tasks. The hoists are arranged on cantilever crabs and travel sideways along the crane carrier. This achieves a considerably larger hook path. Magnet spreaders are used as load handling attachments. They facilitate short attachment times for picking up tubes and ensure that the tubes are handled gently. High handling rates require high speeds: with long travel up to 80 m/min, cross travel up to 30 m/min and load-dependent hoisting speeds of up to 22 m/min, the requirements are fully met.
The cranes unload the road trucks, which deliver the material to three travel paths that cross the crane runway. Via this transport route, the tubes and profiles are taken by transport vehicles to the processing hall parallel to the external store.
Safety under strong wind and adverse weather conditions
Besides the required power of the crane, the top priority for Interfer Rohrunion is safety, which is related not least to factors influencing the availability of the installation. So it must first be ensured that the cranes do not collide on the crane runway. Demag Cranes solved this by means of integrated optical spacing, which ensures the required distance between the cranes.
Moreover, the process cranes are equipped with a mechanical load sway damping system. Sway motions are reduced to a minimum via a rope stabiliser arrangement in the crane and cross-travel direction. The result is more safety for staff, material and operation and higher speeds when handling, and gentle handling of the tubes.
Since the cranes in the external store are subjected to constantly changing weather conditions, Demag Cranes has equipped the hoists with weather protection roofs. Moreover, the crane installations have been equipped with two electromechanical wind drift safety catches, which prevent unintentional crane motions in strong wind or storm conditions. These wind drift safety catches, which click into place on the rail if required, can be activated by remote control.
About Interfer Rohrunion GmbH
Within the Knauf Interfer Group, Interfer Rohrunion is the specialist for seamless and welded distilling and boiler tubes and hollow steel profiles. For more than 30 years, thanks to storage in line with the market and modern logistics, the company has offered its customers high delivery performance and the advantages of a high-performance partner. The most recent investments in the location in Voerde, Germany include the construction of an external store on an area of 12,500 m².
In total, the company belonging to the Knauf Interfer Group today stores more than 30,000 tonnes of tubes of all grades and dimensions on the factory premises in Voerde. With the completed expansion of the production and logistics structures at the Voerde location, Interfer Rohrunion offers even more efficient service and even faster order processing.
About Demag Cranes
The Demag Cranes Group is one of the world’s leading suppliers of industrial cranes and crane components, harbour cranes and terminal automation technology. Services, in particular maintenance and refurbishment, are another key element of the Group’s business activities. The Group is divided into the business segments Industrial Cranes, Port Technology and Services and has strong and well-established Demag and Gottwald brands. Demag Cranes sees its core competence in the development and construction of technically sophisticated cranes and hoists as well as automated transport and logistics systems in ports and terminals, the provision of services for these products and the manufacture of high-quality components.
As a global supplier, Demag Cranes manufactures in 16 countries on five continents and operates a worldwide sales and service network that is present in over 60 countries through its subsidiaries such as Demag Cranes & Components GmbH and Gottwald Port Technology GmbH, agencies and a joint venture. In financial year 2010/2011, the Group, with its 6,115 employees, generated revenue of EUR 1,062.3 million. Since August 2011, the Terex Group in the United States (www.terex.com) has held a majority share in the company.
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