TPi November 2019

Products & developments

Composite tubes from Hoesch Schwerter Hoesch Schwerter Extruded Profiles GmbH develops its products in close collaboration with individual branches and customers. Special profiles are employed in almost all sectors of the steel-processing industry. Steel-specific solutions are implemented that must withstand even the most severe loads, especially in modern power stations or industrial facilities. be solved by using composite tubes, which generally consist of two different individual materials as their outside and inside surfaces. Butterfly valve engineered for long life With thousands of field installations in municipal, industrial and power applications throughout the world, Val- Matic’s American-BFV ® butterfly valves are engineered to provide long life and trouble-free performance. The ductile iron disc adds strength, allowing a smaller cross section and providing improved head loss characteristics. Stainless steel taper pins are designed

to utilise tangential forces to provide a secure method of locking the disc. Val-Matic Valve Corp – USA www.valmatic.com

for such composite tubes are cauldrons for regeneration of leach in the cellulose industry, cropping of control rods in nuclear technology, steam boiler pipes in incinerator plants, cooling pipes in furnaces for gravel roasting, pipes in exhaust heat cauldrons, and overheating pipes in fossil-fired steam cauldrons. The advantages provided by the extrusion process include resistance against wear; multi-functionality (heat conductivity and corrosion resistance); possibility of further processing (eg bending); and delivery of finned tubes that can be welded together. Hoesch Schwerter Extruded Profiles GmbH – Germany

To manufacture composite tubes of this type with metallurgical fusion between the two materials, Hoesch Schwerter Extruded Profiles uses a special procedure: the tubes are manufactured by extruding a pressed blank or pre- block made of two material components, combining them at the high pressure and the high temperature prevailing during extruding. The company states that it is possible, chiefly due to the implementation of a new technology for block manufacturing, to achieve an excellent metallurgical fusion. Application areas

Modern industrial processes have so many different requirements for tube materials that these often cannot be fulfilled by a singlematerial. For instance, individual or combined operational demands may trigger different, even contrary, requirements in terms of corrosion-, oxidation- or wear-resistance of tube surfaces, as well as strength. Constructive problems of this kind may

info@hoeschsep.com www.hoeschsep.com

Steel-specific solutions from Hoesch

25

www.read-tpi.com

November 2019 TUBE PRODUCTS INTERNATIONAL