TPi May 2014

products & developments

Tubing for gasoline direct injection Engineering and advanced materials group Sandvik is introducing a new type of seamless stainless steel tube called Pressurfect TM to meet growing demands from car makers to handle higher fuel pressures in gasoline direct injection (GDI) engines. China, manufacturers are seeking better ways to get “clean power” from smaller combustion engines. The race is on to find the ultimate combustion, a process that often involves raising pressure in the fuel management system and so requiring stronger and lighter tubing.

and low carbon content, which have been optimised to avoid jeopardising properties like corrosion resistance and mechanical strength. The material has also been optimised for machinability, including drilling, turning and other tasks. Pressurfect XP is a lightweight Duplex stainless tube for GDI fuel systems. The material’s mechanical strength enables tube walls to be 30 to 40 per cent thinner, while still handling the same pressure as thicker tubes. The Duplex material has also been optimised to reduce stress corrosion cracking and fatigue. In addition, it improves the brazing process, with little pre-heating or retouch required when mounting the injector ports or other fuel systems. Sandvik Materials Technology – Sweden www.smt.sandvik.com

The new tube will be available in two grades: standard Pressurfect, an austenitic chromium-nickel steel for fuel rails and fuel lines; and Pressurfect XP, a Duplex (austenitic ferritic) stainless steel for demanding fuel rail applications. As the automotive industry seeks out different paths towards “sustainable mobility”, GDI is proving to be one attractive alternative. The technology enables car makers to produce more compact engines with lower emissions and sustained power, while being affordable for mass production.

The growing use of corrosive ethanol blends at higher pressure in the fuel systems is another driver behind Sandvik’s materials development. According to the company, the goal was to develop a strong, corrosion- resistant material that could handle higher pressures with zero risk of stress corrosion cracking. The new Pressurfect is claimed to offer mechanical strength and consistent quality that is superior to conventional welded or carbon steel tube. This is largely due to the steel’s microstructure

Faced with tougher emissions regulations in Europe, the USA and

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Our company is specialised in the industrial production of pipe clamps in small and large series and in special constructions including further processing, coating, pre-assembly and packing. Based on our internal high quality requirements we endeavour to always obtain new quality certificates for our products, having been certified according to ISO 9001 for 20 years and according to EN 1090 class 2 since 2012. Convince yourself of the quality, flexibility and know-how by Rohrbefestigungen Hammerschmid GmbH. If you have any further questions, please contact Jacqueline Hammerschmid. e-mail: jacqueline.hammerschmid@hammerschmid.at

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May 2014 Tube Products International