TPT May 2014

Technology News

Composite tubes from Hoesch HOESCH Schwerter Profile develops products in collaboration with specific fields of industry and customers. Modern power stations and industrial plants are two areas where special steel solutions are used that are required to withstand extreme loads. material. The intention behind this combination of materials is to allow the carbon steel to handle the thermal- mechanical load on the tube, while the austenite provides protection against corrosion from the prevailing environment. of corrosion-resistant outer covering, approximately 2.5mm thick. This is applied using fusion welding, which creates overlapping welding beads. Hoesch Schwerter Profile GmbH – Germany Fax: +49 2304 106 591

Clad pipes (where the corrosion- resistant layer is applied to the tube body by welding) have one or two layers

The classic seamless steel tube for pressure vessels represents a key construction element in the building of thermal plants. The requirements for boiler construction steels become more exacting if, instead of conventional boiler fuels such as coal, oil or gas, other sources of energy are used that result in strongly corrosive combustion products. For instance, boiler tubes in a waste incineration plant are not only exposed to thermal loads, but are also subject to corrosive attack, fundamentally triggered by the chemical element chlorine. For this specific application, the conventional boiler tube used in plant construction with its proven component strength was equipped with a ‘coating’ using a corrosion-resistant austenitic

Email: info@hoesch-profile.com Website: www.hoesch-profile.com

Extruded tubing with internal and external layer

56

www.read-tpt.com

M ay 2014