SEH Engineering GmbH

Future-proof steel technology

Complex bridge construction with Kemppi SuperSnake

SEH Engineering GmbH operates in the steel construction industry. The company has been located in Hanover for over 200 years. In recent years it has shifted from a pure steel construction company to an engineering company. In the fields of steel construction, special construction, bridge and other civil engineering, the internationally operating SEH Engineering GmbH earns between annual revenue of EUR 80-100 million. The company belongs to the French EIFFAGE Group.

SEH Engineering employs about 230 people in Germany. Both the headquarters and  the 22,500 m² manufacturing plant are located in Hanover. Each year, building components and modules of up to 100 tons/item are manufactured within approximately 200,000 production hours. The most renowned, globally recognized constructions include the Center Pompidou in Paris, the Olympic Stadium in Munich, the Shanghai Bank, the Conference Center at the Hanover Fair, several power plants, the Automotive Towers of VW’s Autostadt in Wolfsburg, the Svinesund Bridge between Sweden and Norway, the Swing Bridge El-Ferdan and some bridges over the Rhine River.

Steel construction and structures

Hannover, Germany

Main Challenge

At the end of 2018, another imposing construct will be added into the list after a production time of about seven years – the Hochmoselbrücke Bridge. After completion, this bridge will be one of Germany’s largest bridges with a height of 160 meters and a length of 1.7 kilometers. It will connect both the Belgian/Dutch North Sea ports and Belgian metropolitan areas with the Rhine-Main-area. The bridge leads directly across the Mosel valley from Ürzig to Zeltlingen-Rachtig.

At the production plants in Hanover and Lauterbourg (France), the rolled steel sheets are machined for the superstructure, prefabricated and then transported to the construction site with heavy load carriers. The final assembly is performed with the help of on site SEH-developed displacement technology. The bridge superstructure consists of approx. 900 prefabricated components. With a length of 15-25 meters and a weight of 20-100 tons almost every single component is unique. During execution, production and assembly, current regulations as well as customer requirements had to be taken into consideration.

The world of welding equipment is getting significantly more competitive. It is difficult to find a manufacturer who is willing to assert itself consistently in this domain. With its service, commitment and cooperation, Kemppi meets this challenge. The innovation power and the support of the service and development departments are above average.

Stephan Fabrig, Head of Manufacturing, SEH Engineering GmbH

The WeldEye Solution

The welding equipment and burners from Kemppi have been successfully used in this project to satisfy the specific quality requirements. Kemppi’s SuperSnake sub-feeder especially facilitated operations. With this special equipment, distances of up to 25 meters could be reached with different filler wires between the MIG power sources and wire feeders. So, difficult accessibilities no longer caused problems for the expert staff. Thanks to the SuperSnake, heavy wire feeders did not have to be moved over long distances, which greatly reduced the physical load on the welders and maximized productivity.

The production and assembly of this large-scale project were performed and completed according to DIN 18800. At the same time, however, all orders of the SEH Engineering GmbH are performed according to the regulations of the EN 1090 valid since 1st July 2014. In order to meet the high-quality requirements, SEH decided to start using the WeldEye welding management software. By recording and analyzing the welding data, SEH can use this unique software solution to actively monitor and coordinate the ever-increasing demands for increased quality and productivity. In addition, the software makes it possible to assign the project and building component to a specific project, which is very important for professional project calculation.

The system collects the necessary measured data from welding operations in real time using the corresponding Smart Readers and stores these into the cloud. The acquired welding and production data is then used to determine the quality, operating structure and work phases of the customer – SmartData. After the data analysis, this information becomes a valuable source for quality assurance and thus for the entire production flow of the company. The conclusions drawn are used to ensure continuous productivity improvement. Better calculation values for future projects enable a considerable competitive advantage. It is unique that all welding data can be handed over automatically to the client when the project is completed.

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